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f. Furnishing, placing, and compacting trench backfill per the Contract Documents. g. Furnishing, placing, and compacting of surface stabilization as applicable for the original surface removed including but not limited to restoration of existing landscaping, retaining walls, gutters, curbs, driveways, and fencing disturbed by the work. Furnishing, placing, and compacting of temporary asphalt pavement as applicable for the original surface removed including daily placement of temporary hot mix asphalt, followed by phased placement of trench-only asphalt concrete base, resetting valve boxes, monuments, and other surface features disturbed by the work; protection of landscaping and trees; and restoration of landscaping and trees.
h. Cleaning, post installation CCTV inspection, and testing of the installed pipe. i. Record drawing preparation and submittal
Bid Item 15 Reconnect Existing Sanitary Sewer Lateral (Per Each Lateral)
This bid item shall be paid at the unit price bid per each existing sanitary sewer service lateral to be reconnected to the main. The work includes furnishing all equipment, materials and personnel associated with the following and in accordance with the Contract Documents and as directed by the Engineer.
This bid item includes:
a. Locating and protecting existing utilities.
b. Locating and exposing existing sewer lateral and removing all roots in portions of laterals to be reconnected.
c. Saw cutting, grinding, excavating and properly disposing of surface concrete, including sidewalk, curb, and gutter, and asphalt concrete surfaces, including asphalt containing reinforcing fabric; and where applicable, excavation of unpaved surfaces, retaining walls or curbs, landscaping, and fencing. d. Trenching and proper handling and disposal of excavation spoils, including dust control, trench dewatering and wastewater bypass pumping and rerouting as needed.
e. Removal of existing lateral piping, furnishing and installing new sewer lateral pipe between main and the section of the lateral to remain by open cut methods; and connecting the service lateral at a wye installed in the main sewer line as shown on the Contract Drawings. Work includes preparing and compacting service lateral sub-base; furnishing, placing and compacting pipe bedding. f. Furnishing, placing, and compacting trench backfill per the Contract Documents. g. Furnishing, placing, and compacting of surface stabilization as applicable for the original surface removed including but not limited to restoration of existing landscaping, retaining walls and curbs, and fencing disturbed by the work.
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Furnishing, placing, and compacting of temporary asphalt pavement as applicable for the original surface removed including daily placement of temporary hot mix asphalt, followed by phased placement of trench-only asphalt concrete base, resetting valve boxes, monuments, and other surface features disturbed by the work; protection of landscaping and trees; and restoration of landscaping and trees.
h. Cleaning, post installation CCTV inspection, and testing of the installed pipe. i. Record drawing preparation and submittal
Bid Item 16 Manhole Vacuum Testing
(Per Each Location)
This bid item shall be paid at the unit price bid per each manhole vacuum tested in accordance with ASTM C1244 and Section 02735 Sanitary Sewer System Testing and Cleaning.
This bid item includes furnishing all equipment, materials, and personnel associated with therewith, and in accordance with the Contract Documents.
Bid Item 17 Compaction Testing
(Per Lump Sum)
Payment for this item shall be lump sum, prorated over the course of the project based upon the percentage complete of all items.
This bid item includes compaction testing of all backfilled areas; furnishing all equipment, materials and personnel associated with the foregoing, and in accordance with the Contract Documents.
Bid Item 18 Point Repair (up to 6 feet in length)
(Per Each Location)
Measurement and payment for this item shall be on a unit basis per each location. The contract price for this bid item shall include full compensation for furnishing all labor, equipment, tools, materials, appurtenances, and incidentals for doing all the work necessary to replace up to 6 feet in length of the sewer location by open cut construction, in accordance with City Standard Detail No. 16, Standard Sewer Lateral, and City Standard Detail No. 13, Standard Connection to Manhole Walls , including, but not limited to: site clearing; sawcutting; excavation; dewatering; prote ction of existing utilities; diversion of sewage flow; potholing; pipeline segment removal; s ubgrade stabilization if required; installation of bedding; pipeline segment and fittings to match the size and material of the existing lateral (either 4, 5, or 6); manhole or sewer main connection ( including replacement of wye or saddle , regardless of existing condition, with wye or sad dle to match the material of the existing main); backfill and compaction; site and surface restoration including reconstruction of concrete curb, gutter, sidewalk, or driveway to the nearest score joint, replacing asphalt, traffic striping, and pavement markings; testing and services related to collection, removal, and dispos al of materials to a Class II/III facility; cleanup; post-CCTV; and pipeline testing in accordance with the Contract Documents.
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Bid Item Descriptions 2025 On-Call Sewer Replacement Project Page B-9 Project No. C1702
This bid item shall include up to 6 feet in length of pipe replacement. Pipe length shall be based on the linear footage of pipe installed, and depth as measured at the connection to the main from top of pipe to surface.
This bid item shall include up to 8 feet of pipe depth. Pipe depth shall be based upon the greatest distance from the top of pipe to the ground surface above the pipe centerline.
Bid Item 19 - Additional Point (beyond 6 feet in length) (Per Linear Foot)
Measurement and payment for this item shall be on a linear foot basis. Pipe length shall be based on the linear footage of pipe installed, and depth as measured at the connection to the main from top of pipe to surface. The contract price for this bid item shall include full compensation for furnishing all labor, equipment, tools, materials, appurtenances, and incidentals for doing all the work necessary to replace the additional length of pipe beyond the 6 feet of length of the sewer by open cut construction, in accordance with City Standard Detail No. 16, “Standard Sewer Lateral”, and City Standard Detail No. 13, “Standard Connection to Manhole Walls”, including, but not limited to: site clearing; sawcutting; excavation; dewatering; protection of existing utilities; diversion of sewage flow; potholing; pipeline segment removal; subgrade stabilization if required; installation of bedding; pipeline segment and fittings to match the size and material of the existing lateral (either 4”, 5”, or 6”); manhole or sewer main connection (including replacement of wye or saddle, regardless of existing condition, with wye or saddle to match the material of the existing main); backfill and compaction; site and surface restoration including reconstruction of concrete curb, gutter, sidewalk, or driveway to the nearest score joint, replacing asphalt, traffic striping, and pavement markings; testing and services related to collection, removal, and disposal of materials to a Class II/III facility; cleanup; post-CCTV; and pipeline testing in accordance with the Contract Documents.
This bid item shall include up to 8 feet of depth. Pipe depth shall be based upon the greatest distance from the top of pipe to the ground surface above the pipe centerline.
Bid Item 20 and/or 29- Remove and Replace 6” or 8” Sanitary Sewer Main (Pipe Burst)
(Per Linear Foot)
Measurement and payment for this item shall be on a linear foot basis. The contract price for this bid item shall include full compensation for furnishing all labor, equipment, backup equipment, tools, materials, appurtenances, and incidentals for doing all the work necessary to replace the sewer by pipe bursting, in accordance with City Standard Detail No. 16, “Standard Sewer Lateral”, and City Standard Detail No. 13, “Standard Connection to Manhole Walls”, including, but not limited to: site clearing; sawcutting; excavation of insertion and receiving pits; dewatering; protection of existing utilities; diversion of sewage flow; potholing; pipe bursting; fusing and installation of HDPE pipe; lubrication; manhole or sewer main connection (including replacement of wye or saddle, regardless of existing condition, with wye or saddle to match the material of the existing main); backfill and compaction of entry and exit pits; site and surface restoration including reconstruction of concrete curb, gutter, sidewalk, or driveway to the nearest score joint, replacing asphalt, traffic striping, and pavement markings; testing and services
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related to collection, removal, and disposal of materials to a Class II/III facility; cleanup; post-CCTV; and pipeline testing in accordance with the Contract Documents.
Pipe length shall be based on the linear footage of pipe installed, and depth as measured at the connection to the main from top of pipe to surface.
This bid item shall include up to 9 feet of pipe depth. Pipe depth shall be based upon the greatest distance from the top of pipe to the ground surface above the pipe centerline.
Bid Item 21 Excavate Bedrock (Revocable)
(Per Cubic Feet)
This bid item shall be paid at the unit price bid per cubic feet of bedrock excavation indicated on the Drawings or as directed by the Engineer. This payment item will be measured in the trench.
This bid item includes excavating bedrock and prope r disposal of materials. The work includes furnishing all equipment, materials and personnel associated with the foregoing, and in accordance with the Contract Documents. The Engineer during construction operations will make the determination of bedrock material.
Bid Item 22 Demolition of Asphalt Concrete
(Per Square Foot)
Measurement and payment for this item shall be on a square foot basis. The demolition of asphalt concrete shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in removal and disposal of asphalt concrete, base, subgrade, including furnishing, constructing, maintaining, removing, and disposing of temporary asphalt concrete tapers (eg, at driveways and utility structures), complete in place as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 23 Demolition of Concrete Curb and Gutter
(Per Linear Foot)
Measurement and payment for this item shall be on a linear foot basis. The demolition of concrete curb and gutter shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals, and for doing all work involved in saw cutting, demolishing, and removing the existing concrete curb and gutter and base and/or other material as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 24 Demolition of Concrete Sidewalk
(Per Square Foot)
Measurement and payment for this item shall be on a square foot basis. The demolition of concrete sidewalk shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals, and for doing all work involved in saw cutting, demolishing,
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removing the existing concrete sidewalk and base, preparing the subgrade, furnishing and compacting the aggregate base, protecting and incorporating existing pipe drains as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 25 Excavation of Aggregate Base and Soil
(Per Cubic Yard)
The cubic yard paid for excavation of aggregate bas e and soil shall include full compensation for furnishing all labor, equipment, t ools, and incidentals necessary to excavate existing aggregate base and soil as specified herein in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 26 Removal of Unsuitable Material
(Per Cubic Yard)
The cubic yard paid for the removal of unsuitable material shall include full compensation for furnishing all labor, equipment, tools, and incidentals necessary to excavate, remove, off haul, and including proper disposal of unsuitable m aterials from the project limits, as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 27 Import of Suitable Fill Material
(Per Cubic Yard)
The cubic yard paid for import of suitable fill mat erial shall include full compensation for furnishing all labor, equipment, tools, and inciden tals necessary to import, haul, place, spread, and compact suitable fill material to the p roject limits, as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 30 Light-Weight Fill
(Per Cubic Yard)
The contract price paid per cubic yard for light-weight fill shall include full compensation for furnishing all labor, tools, equipment, and incidentals and for doing all the work involved, including filling the pipe with slurry, complete in place as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 31 Backfill and Compaction
(Per Cubic Yard)
The cubic yard paid for backfill and compaction shall include full compensation for furnishing all labor, equipment, tools, and incidentals necess ary to for doing all the work involved, complete in place to backfill and compact suitable fill material necessary to reach relative compaction, as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
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Bid Item Descriptions 2025 On-Call Sewer Replacement Project Page B-12 Project No. C1702
Bid Item 32 Dewatering (Revocable)
(Per Lump Sum)
The contract price paid per lump sum to dewatering shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals for doing all the work involved in removing groundwater and/or surface runoff complete in place, as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 33 Roadway Aggregate Base (AB) Placement
(Per Square Foot)
The contract price paid per square foot for aggregate base shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in installing aggregate base and compacting as necessary to reach relative compaction, complete in place, as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 34 Asphalt Concrete
(Per Ton)
The contract price paid per ton for asphalt concrete shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved including furnishing and placing asphalt concrete, tack coat, leveling courses, patch paving, AC conforms, restoring AC on the gutter lip, complete in place as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 35 Installation of Concrete Curb and Gutter with AB (Per Linear Foot)
The Contract price paid per linear foot for the installation of concrete curb and gutter with AB, and shall include full compensation for furnishing all labor, materials, tools, equipment and incidentals, and for doing all work involved including surveying, staking, layout, and 1 foot width removal of asphalt concrete, sawcutting, demolishing, protecting and incorporating existing pipe drains into the new work, preparing the subgrade, furnishing and compacting the aggregate base, doweling into the existing concrete, furnishing, placing and finishing concrete, and placing curing compound as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 36 Installation of Concrete Sidewalk with AB (Per Square Foot)
The contract unit price per square foot for the installation of concrete sidewalk with AB shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved, including surveying, staking, layout, preparing the subgrade, furnishing and compacting the aggregate base, doweling into the existing concrete, furnishing, placing and finishing concrete, replacing and adjusting to
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grade utility boxes (shall be non-skid), protecting and incorporating existing pipe drains into the new works, and placing curing compound as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 38 Coordination with PG&E (Revocable)
(Per Lump Sum)
The contract price paid per lump sum for coordinati on with PG&E shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals for doing all the work involved in completing repairs as spec ified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
Bid Item 39 Additional Pavement, Sidewalk, and Soil Removal and Replacement if Benched Cut at Location 2 (Revocable)
(Per Lump Sum)
The contract price paid per lump sum for additional pavement, sidewalk, and soil removal and replacement if benched cut at location 2 shall include full compensation for furnishing all labor, materials, tools, equipment, and inciden tals for doing all the work involved in completing repairs as specified in the Specifications, the Special Provisions, Appendix C, and as directed by the Engineer and no additional compensation will be allowed therefor.
END OF SECTION
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TECHNICAL PROVISIONS
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TABLE OF CONTENTS
SECTION 1 DEMOLITION OF PIPELINES AND STRUCTURES....................................................................1 SECTION 2 DEWATERING .......................................................................................................................6 SECTION 3 BYPASSING WASTEWATER............................................................................................ .......9 SECTION 4 EARTHWORK ......................................................................................................................11 SECTION 5 CONTROLLED LOW-STRENGTH MATERIAL.........................................................................25 SECTION 6 PIPEBURSTING....................................................................................................................30 SECTION 7 SHORING ............................................................................................................................36 SECTION 8 ASPHALTIC CONCRETE PAVING....................................................................................... ...42 SECTION 9 CURBS, GUTTERS, SIDEWALKS, CURB RAMPS, VALLEY GUTTERS, AND DRIVEWAYS .........50 SECTION 10 TRAFFIC STRIPES AND PAVEMENT MARKINGS ................................................................54 SECTION 11 SANITARY SEWER LATERALS ............................................................................................56 SECTION 12 PRECAST CONCRETE MANHOLES .....................................................................................59 SECTION 13 SANITARY SEWER SYSTEM TESTING.................................................................................62 SECTION 14 SEWER CLEANING ............................................................................................................66 SECTION 15 CCTV INSPECTION OF EXISTING AND REHABILITATED SEWERS .......................................69 SECTION 16 REINFORCEMENT STEEL ...................................................................................................76 SECTION 17 CAST-IN-PLACE CONCRETE.............................................................................................. .81 SECTION 18 GENERAL PIPING ..............................................................................................................91 SECTION 19 POLYVINYL-CHLORIDE PIPE ..............................................................................................94 SECTION 20 HIGH-DENSITY POLYETHYLENE PIPE.................................................................................99
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Technical Provisions 2025 On-Call Sewer Replacement Project Page TP-3 Project No. C1702
SECTION 1 DEMOLITION OF PIPELINES AND STRUCTURES
PART 1 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall furnish all tools, equipment, materials, and supplies and shall perform all labor as required for the demolition, removal, disposal, and salvage of all structures, improvements, utilities, and facilities in accordance with the Contract Documents.
B. The WORK of this Section shall include, but shall not be limited to, the following items:
1. Demolition and disposal of asphalt pavement, concrete pavement, curbs and gutters, and other pavement features.
2. Demolition and disposal of concrete pavement, concrete sidewalks, concrete driveways, and other property improvements.
3. Demolition, salvage, and disposal of existing sewer, water, storm drain, drainage inlets/outlets, and other utilities as required to complete the WORK. Items to be salvaged shall be as indicated in the Contract Documents and/or as directed by the City.
C. All salvaged items shall become the property of the CONTRACTOR. No salvaged items shall be used in the new WORK without the written approval of the ENGINEER.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
All work in connection with demolition and salvage shall be in accordance with applicable local, state, and federal regulations and safety orders. Demolition, abandonment, or salvage work shall not begin until all required permits have been obtained and required reports have been filed.
1.3 BURNING AND BLASTING
A. The use of burning for the disposal of refuse, debris, and waste materials resulting from abandonment, demolition, and site clearing operations will not be permitted.
B. Blasting is not permitted.
1.4 JOB CONDITIONS
A. The CITY assumes no responsibility for actual condition of the facilities to be demolished.
The CONTRACTOR shall visit the site, inspect all facilities, and become familiarized with all existing conditions and utilities.
B. No existing pipeline or structure shall be demolished without appropriate provision for continuous service.
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PART 2 - PRODUCTS
1.1 Not Used.
PART 3 - EXECUTION
1.1 DEMOLITION
A. General: Demolition WORK shall be conducted in a manner that protects against damage to facilities to remain and that provides necessary protection against injury to the CONTRACTORs and CITYs personnel, as well as the general public. In general the CONTRACTOR shall perform the WORK with prime consideration to the following:
1. Protection of CONTRACTOR and CITY personnel, as well as the public.
2. Protection of existing facilities to remain.
3. Control noise, shocks, and vibration.
4. Control dust and debris.
5. Access to existing facilities for operation and maintenance by CITY personnel.
6. Coordination and cooperation with the CITY and other contractors, particularly with respect to shutdown of existing facilities.
7. Timely and proper disposal of demolition debris.
B. Disposal of all materials shall be performed in compliance with applicable local, state, and federal codes and requirements. No trace of these structures shall remain prior to placing of backfill in the areas from which structures were removed.
C. The CONTRACTOR shall note that the Project Drawings are approximate and are a compilation of local agencies and survey data. The plans and sections have been reproduced to clarify the scope of WORK as much as possible.
D. The identification and extent of demolition, such as, but not limited to, pavement demolition and utility demolition are the responsibility of the CONTRACTOR. The CONTRACTOR shall make every attempt to minimize the extent of the demolition unless noted otherwise.
E. Asphalt pavement, concrete sidewalk, and concrete curbs and gutters shall be removed as necessary to perform the specified WORK. The limits of removal shall be saw cut.
When the required improvements have been constructed, new asphalt pavement, concrete sidewalk, and concrete curbs and gutters shall be constructed in accordance with the City of San Carlos Standard Details.
F. When existing pipe is removed, the CONTRACTOR shall plug all resulting abandoned connections whether or not shown. Where removed piping is exposed, the remaining piping shall be blind-flanged or fitted with a removable cap or plug.
G. When the existing piping is removed from existing structures, the CONTRACTOR shall fill all resulting holes in the structures and repair any damage such that the finished rehabilitated structure shall appear as a new homogeneous unit with little or no indication of where the new and old materials join. The holes in water-bearing structures shall be filled with non-shrink grout to be watertight and reinforced, as required. In all locations
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where the surface of the grout will be exposed to view, the non-shrink grout shall be recessed to approximately ½ inch back of the exposed surface, and the recessed area shall be filled with cement mortar grout.
H. Where existing piping is to be abandoned, the CONTRACTOR shall cut back the abandoned pipe for a distance of 5 feet from any connecting structures. All holes at the existing structures shall be repaired. The abandoned pipe shall be filled with CLSM and capped at both ends prior to backfill.
1.2 STRUCTURE AND PIPING REHABILITATION
A. Certain areas of existing structures, piping, conduits, and the like will be affected by work necessary to complete modifications under this Contract. The CONTRACTOR shall rehabilitate those areas affected by its construction activities.
B. When new piping is installed in existing structures, the CONTRACTOR shall accurately position core-drilled openings in the concrete. Openings shall be of sufficient size to permit a final alignment of pipelines and fittings without deflection of any part and to allow adequate space for satisfactory packing where the pipe passes through the wall to ensure water tightness around openings so formed. The boxes or cores shall be provided with continuous keyways to hold the filling material in place, and shall have a slight flare to facilitate grouting and the escape of entrained air during grouting. Before placing the non-shrink grout, concrete surfaces shall be sandblasted, thoroughly cleaned of sand and any other foreign matter, and shall be coated with epoxy bonding compound.
C. When new piping is to be connected to existing piping, the existing piping shall be cut square and ends properly prepared for the connection required. Any damage to the lining and coating of the existing piping shall be repaired by the CONTRACTOR. Dielectric insulating joints shall be installed at interconnections between new and existing piping, if required.
D. Existing reinforcement to remain in place shall be protected, cleaned, and extended into new concrete. Existing reinforcement not to be retained shall be cut off as follows:
1. Where new concrete joins existing concrete at the removal line, reinforcement shall be cut off flush with the concrete surface at the removal line.
2. Where the concrete surface at the removal line is the finished surface, the reinforcement shall be cut back 2 inches below the finished concrete surface, the ends painted with epoxy paint, and the remaining holes patched with cement mortar grout.
1.3 BELOW-GRADE DEMOLITION
A. Footings, foundation walls, below-grade construction, and concrete slabs on grade shall be demolished and removed to a depth which will not interfere with new construction, but not less than 12 inches below existing ground surface or future ground surface, whichever is lower.
B. Below-grade areas and voids resulting from demolition of structures shall be completely filled.
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C. All fill and compaction shall be in accordance with Section 4, Earthwork.
D. After fill and compaction, surfaces shall be graded to meet adjacent contours and to provide flow to surface drainage structures, unless noted otherwise.
1.4 DISPOSAL OF DEMOLISHED MATERIALS
A. Demolition and removal of debris shall be conducted to ensure minimum interferences with roads, streets, walks, and other adjacent occupied or used facilities. Alternate routes shall be provided around closed or obstructed traffic ways.
B. Site debris, rubbish, and other materials resulting from demolition operations shall be legally removed and disposed of at the CONTRACTORs expense.
1.5 SALVAGE
A. The CONTRACTOR may salvage and restore such items as, but not limited to, fences, gates, street signs, retaining walls, road barriers, guard rails, and other items when in good and reasonable condition and approved by the ENGINEER. The salvage shall be performed in a manner that will preserve the condition of the item being salvaged. Items not in salvageable condition shall be demolished, removed, and replaced. All items not in usable condition at the time of replacement shall be removed and replaced at the CONTRACTORs cost to the satisfaction of the ENGINEER.
1.6 OCCUPANCY AND POLLUTION CONTROL
A. Water sprinkling, temporary enclosures, chutes, and other suitable methods shall be used to limit dust and dirt rising and scattering in the area. The CONTRACTOR shall comply with government regulations pertaining to environmental protection.
B. Water shall not be used when it creates hazardous or objectionable conditions such as mud, flooding, or pollution.
1.7 PROTECTION
A. Safe passage of persons around the area of demolition shall be ensured. Operations shall be conducted to prevent injury to people and damage to adjacent buildings, structures, or other facilities.
B. Interior and exterior shoring, bracing, or supports shall be provided to prevent movement, settlement, or collapse of structures to be demolished, and to adjacent facilities to remain.
C. Existing landscaping materials, structures, and appurtenances that are not to be demolished shall be protected.
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1.8 CLEANING
A. During and upon completion of WORK, the CONTRACTOR shall promptly remove unused tools and equipment, surplus materials, rubbish, debris, and dust and shall leave areas affected by the WORK in a clean, approved condition.
B. Adjacent structures shall be cleaned of dust, dirt, and debris caused by demolition, as directed by the ENGINEER or governing authorities, and adjacent areas shall be returned to the condition existing prior to start of WORK.
END OF SECTION
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SECTION 2 DEWATERING
PART 1 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall provide all labor, materials, and equipment necessary to dewater trench and structure excavations, in accordance with the requirements of the Contract Documents, to enable the pipes and structures to be installed in excavations that are free from standing or flowing water that may be due to groundwater, surface water, storm water, precipitation, or wastewater.
1.2 CONTRACTOR SUBMITTALS
Prior to commencement of excavation, the CONTRACTOR shall submit a detailed plan and operation schedule for dewatering of all excavations. The CONTRACTOR shall be able to demonstrate the system proposed and verify that adequate equipment, personnel, and materials are provided to dewater the excavations at all locations and times. Additional requirements are identified in Section 4, Earthwork. The dewatering submittal shall be submitted to the ENGINEER at the same time as the shoring submittal.
1.3 QUALITY CONTROL
A. The CONTRACTOR shall control the rate and effect of the dewatering in such a manner as to avoid all settlement and subsidence.
B. All dewatering operations shall be adequate to assure the integrity of the finished project.
C. Where critical structures or facilities exist immediately adjacent to areas of proposed dewatering, reference points shall be established and observed at daily intervals to detect any settlement that may develop. The CONTRACTOR shall conduct the dewatering operation in a manner that protects adjacent structures and facilities. The cost of repairing any damage to adjacent structures and restoration of facilities shall be the responsibility of the CONTRACTOR.
PART 2 - PRODUCTS
1.1 EQUIPMENT
Dewatering, where required, may include the use of wells, well points, sump pumps, temporary pipelines for water disposal, rock or gravel placement, and other means.
Standby pumping equipment shall be maintained on the jobsite.
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PART 3 - EXECUTION
1.1 GENERAL REQUIREMENTS
A. The CONTRACTOR shall provide all equipment necessary for dewatering. It shall have on hand, at all times, sufficient pumping equipment and machinery in good working condition and shall have available, at all times, competent workers for the operation of the pumping equipment. Adequate standby equipment shall be kept available at all times to ensure efficient dewatering and maintenance of dewatering operation during equipment or power failure.
B. Dewatering for structures and pipelines shall commence no later than when groundwater is first encountered, and shall be continuous until such time as water can be allowed to rise in accordance with the provisions of this Section and to protect structures, piping, and other project features.
C. At all times, site grading shall promote drainage away from excavations. Surface runoff shall be diverted from excavations. Water entering the excavation from surface runoff shall be collected in shallow ditches around the perimeter of the excavation, drained to sumps, and be pumped or drained by gravity from the excavation to maintain a bottom free from standing water.
D. Dewatering shall at all times be conducted in such a manner as to preserve the undisturbed bearing capacity of the subgrade soils at proposed bottom of excavation.
Dewatering shall lower the water outside the excavation to ensure that seepage and migration of soil particles do not occur through openings in the shoring.
E. If subgrade soils are disturbed or loosened by the upward seepage of water or an uncontrolled flow of water, the affected areas shall be excavated and replaced in accordance with Section 4, Earthwork, at no additional cost to the CITY.
F. The CONTRACTOR shall maintain the water level 3 feet below the bottom of any excavation in all WORK areas where groundwater occurs during excavation, construction, backfilling, and up to acceptance.
G. Flotation of pipe, manholes, and equipment shall be prevented by the CONTRACTOR by maintaining a positive and continuous removal of water. The CONTRACTOR shall adequately keep excavations dewatered.
H. If well points or wells are used, they shall be adequately spaced to provide the necessary dewatering and shall be sand packed and/or other means used to prevent pumping of fine sands or silts from the subsurface. Subsurface soil shall not be removed by the dewatering operation.
I. The release of groundwater to its static level shall be performed in such a manner as to maintain the undisturbed state of the natural foundation soils, prevent disturbance of compacted backfill, and prevent flotation or movement of structures or pipelines.
J. The CONTRACTORs dewatering operations shall not interfere with vehicle or pedestrian traffic. Under no circumstances shall dewatering water be allowed to flood
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streets and cause hazardous conditions for vehicular or pedestrian traffic. Dewatering pump noise shall be mitigated, especially at night. Any mitigating measures taken to conform to these requirements shall be at no extra expense to the CITY. The CONTRACTOR shall obtain any and all permits required in conjunction with dewatering operations, including permits for construction of dewatering wells.
K. The CONTRACTOR shall dispose of water from the WORK in a suitable manner without nuisance or damage to adjacent property. No water shall be discharged into sanitary sewers or storm drains without the prior written consent of the CITY. Water shall be filtered using an approved method to remove sand, silt, and fine-sized soil particles before disposal into any drainage system. The CONTRACTOR shall remove and dispose of any sand or silt that accumulates in the drainage systems used for water discharge, at no additional cost to the CITY.
END OF SECTION
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SECTION 3 BYPASSING WASTEWATER
PART 4 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish all tools, equipment, materials, and supplies, and shall perform all labor as required for the bypassing of wastewater in order to complete the WORK of this Contract. CONTRACTOR shall be responsible for bypassing wastewater in a way that assures that no wastewater is allowed to leak outside of the sanitary sewer system or the bypass pipelines. If leakage does occur, CONTRACTOR shall pay all fines and reimburse the City for all costs associated with the cleanup of the leakage, as well as costs associated with legal actions.
1.2 SUBMITTALS
The CONTRACTOR shall submit a plan for bypassing wastewater as required to complete the WORK indicated in the Contract Documents. The submittal shall identify the type, size, and quantity of all pumps, motors, and power equipment; type and size of all piping, fittings, and connections; location of bypass pumps, standby pumps, and pipes; and anticipated schedule for bypass operation.
The Contractor shall also submit to the Engineer, for review, a contingency plan that outlines procedures to be implemented to prevent: sewage spills onto streets or into basements of buildings, backup into service laterals, and sewage from entering the storm drain system.
PART 5 - PRODUCTS
Not used.
PART 6 - EXECUTION
1.1 GENERAL
A. Flow in the existing sewers shall not be restricted or dammed for any period of time without the approval of the ENGINEER. Prior to plugging any lines, the CONTRACTOR shall notify the ENGINEER at least 24 hours in advance. All wastewater facilities shall remain in continuous and full operation during construction.
B. Bypassing of untreated wastewater to surface water or drainage courses shall not be permitted. The CONTRACTOR shall adhere to all agency restrictions regarding the transport and conveyance of wastewater.
C. All pumps and piping shall be sized to adequately convey the flows anticipated at each bypass application. The bypass system shall be watertight; no leakage will be allowed.
Diversion pumping equipment and piping shall be tested for leaks prior to pumping
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sewage. At no time shall the sanitary sewer system become surcharged due to diversion of flow.
D. Diversion of sewage flow shall not be implemented during rainy weather, unless authorized by the ENGINEER. High sewage flow conditions may require the CONTRACTOR to temporarily suspend work. Work that requires sewage diversion shall be suspended until sewage flow conditions allow for resumption of diversion activities.
Days in which the suspension is in effect shall not be considered working days, and no additional compensation will be allowed therefor.
E. The CONTRACTOR shall take all necessary measures to ensure that sewage does not spill onto the street or onto private properties. The CONTRACTOR shall be responsible for all costs associated with the clean-up or damage from any sewage spills or debris resulting from diversion of flows.
1.2 TEMPORARY PUMPING
A. Where temporary pumps are required to bypass any sewage, the CONTRACTOR shall not start the bypassing until the bypassing submittal has been favorably reviewed by the CITY.
B. Wastewater shall be bypassed during the connection of new pipelines to existing pipelines, unless the connection is made at a manhole and all wastewater can be contained within the collection system.
C. Where bypass pipelines are required to cross traffic lanes, and will be in place for more than three (3) days, the piping and fittings shall be buried a minimum of 4 inches below the pavement surface and backfilled with temporary asphalt concrete surfacing. At no time shall traffic lanes be blocked or closed, unless specifically allowed in writing by the CITY.
D. Temporary ramps may be constructed over pipelines 6 inches in diameter, or less, to allow access to driveways. Where pipelines larger than 6 inches in diameter cross driveways, they shall be buried a minimum of 4 inches below the existing ground or pavement surface and backfilled with temporary asphalt concrete surfacing. No driveway access shall be blocked without the written authorization of the affected property owner.
E. Pressure relief valves shall be provided at the high point in each section of elevated piping.
F. Pumped bypass systems shall be continuously monitored.
END OF SECTION
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SECTION 4 EARTHWORK
PART 7 - GENERAL
1.1 THE REQUIREMENT
The work of this Section includes all earthwork required for construction of the project.
Such earthwork shall include, but not be limited to, the loosening, removing, loading, transporting, depositing, and compacting in its final location of all materials wet and dry, as required for the purposes of completing the work, which shall include, but not be limited to, the furnishing, placing, and removing of sheeting and bracing necessary to safely support the sides of all excavations; the supporting of structures above and below the ground; all backfilling around pipes and structures and all backfilling of trenches and pits; the disposal of excess excavated materials; borrow of materials to make up deficiencies for fills; and all other incidental earthwork.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
C. Commercial Standards:
ASTM D 422 Method for Particle-Size Analysis of Soils.
ASTM D 698 Test Methods for Moisture-Density Relations of Soils and Soil- Aggregate Mixtures, Using 5.5-1b/ (2.49-kg) Rammer and 12-in (304.8-mm) Drop.
ASTM D 1556 Test Method for Density and Unit Weight of Soil in Place by the Sand-Cone Method.
ASTM D 1557 Test Methods for Moisture-Density Relations of Soils and Soil-Aggregate Mixtures Using 10-lb (4.54-kg) Rammer and 18-in (457-mm) Drop.
ASTM D 1633 Test Method for Compressive Strength of Molded Soil-Cement Cylinders.
ASTM D 2419 Test Method for Sand Equivalent Value of Soils and Fine Aggregate.
ASTM D 2487 Classification of Soils for Engineering Purposes.
ASTM D 2901 Test Method for Cement Content of Freshly Mixed Soil-Cement.
ASTM D 2922 Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth).
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ASTM D 3744 Test Method for Aggregate Durability Index
ASTM D 3786 Test Method for Hydraulic Bursting Strength of Knitted Goods and Nonwoven Fabrics: Diaphragm Bursting Strength Tester Method.
ASTM D 3787 Test Method for Bursting Strength Knitted Goods: Constant- Rate-of-Traverse (CRT), Ball Burst Test
ASTM D 4253 Test Methods for Maximum Index Density of Soils Using a Vibratory Table.
ASTM D 4254 Test Methods for Minimum Index Density of Soils and Calculation of Relative Density.
ASTM D 4318 Test Method for Liquid Limit, Plastic Limit, and Plasticity Index of Soils.
ASTM D 4491 Test Methods for Water Permeability of Geotextiles by Permittivity.
ASTM D 4632 Test Method for Grab Breaking Load and Elongation of Geotextiles.
ASTM D 4751 Test Method for Determining the Apparent Opening Size of a Geotextile.
1.3 CONTRACTOR SUBMITTALS
A. The CONTRACTOR's attention is directed to the provisions for Shoring and Bracing Drawings" in Section 9 of the California Labor Code.
B. The type of shoring shall be chosen and designed by the CONTRACTOR.
C. The CONTRACTOR shall prepare and submit a trench and structure excavation dewatering plan which describes in detail the means by which the construction of pipelines and structures under dry conditions is to be accomplished. Also see Section 2, Dewatering, for additional requirements pertaining to dewatering.
D. Backfill Materials: Prior to beginning the WORK, the CONTRACTOR shall submit to the ENGINEER, for review, properties and gradations of all backfill materials proposed for use on the project as specified herein. Testing shall be performed by an independent testing laboratory. All costs related to such testing shall be borne by the CONTRACTOR.
1.4 QUALITY ASSURANCE
A. General: All soils testing will be done by a testing laboratory of the CITY's choice at the CONTRACTORs expense, except as otherwise noted. The CONTRACTOR shall provide the ENGINEER at least 24 hours notice in advance of required tests.
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B. Where soil material is required to be compacted to a percentage of maximum density, the maximum density at optimum moisture content will be determined in accordance with ASTM D 1557. Where cohesionless, free-draining soil material is required to be compacted to a percentage of relative density, the calculation of relative density will be determined in accordance with ASTM D 4253 and D 4254. In-place, field-density tests will be performed in accordance with ASTM D 1556, ASTM D 2922, or by such other means acceptable to the ENGINEER.
C. In case the tests of the fill or backfill show noncompliance with the required density, the CONTRACTOR shall accomplish such remedy as may be required to ensure compliance. Subsequent testing to show compliance shall be by a testing laboratory selected by the CITY and shall be at the CONTRACTOR's expense.
D. The CONTRACTOR shall provide access in the trench for the CITY's soil compaction testing technician or inspector. This shall include providing and properly installing safety equipment and temporary shoring to enable compaction testing at SEVERAL LEVELS in the trench. Should the CONTRACTOR have backfilled to an elevation above that required to be tested, then the backfill shall be excavated down to the necessary level for testing and provided at the CONTRACTORs cost. Subsequent backfilling shall also be at the CONTRACTOR's cost.
E. Particle size analysis of soils and aggregates will be performed using ASTM D 422.
F. Determination of sand equivalent value will be performed using ASTM D 2419.
G. Unified Soil Classification System: References in these specifications to soil classification types and standards are set forth in ASTM D 2487. The CONTRACTOR shall be bound by all applicable provisions of said ASTM D 2487 in the interpretation of soil classifications.
H. The determination of durability index will be made using ASTM D 3744.
I. The determination of the resistance (R-value) will be made using ASTM D 2824 or California Test Method No. 301, State of California, Department of Transportation.
PART 8 - PRODUCTS
1.1 SUITABLE BACKFILL
A. Backfill shall be suitable, selected, or processed clean, fine earth, rock, or sand, free from grass, roots, brush, or other vegetation.
B. Backfill placed within 6 inches of any structure or pipe shall be free of rocks or unbroken masses of earth materials having a maximum dimension larger than 3 inches.
C. The following types of backfill materials are designated and defined as follows:
1. Sand: 100 percent passing a 3/8-inch sieve, at least 90 percent passing a Number 4 sieve, and a sand equivalent value not less than 28.
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2. Class 2 Aggregate Base: The use of recycled aggregate base for trench backfill shall not be allowed in the trench section. The aggregate base shall conform to the provisions of Section 26 (Class 2 Aggregate Base) of the State Standard Specifications for 3/4-inch maximum grading. The material shall have a minimum Resistance (R-value) of 78, and shall meet the following gradation requirements:
Sieve Size Percentage Passing
1 inch 100
3/4 inch 87 - 100
No. 4 30 - 65
No. 30 5 - 35
No.200 0 - 12
3. Drain Rock and Foundation Support shall be crushed stone, or gravel, durable and free from slaking or decomposition under action or alternate wetting or drying.
The material shall meet the following gradation requirements:
Sieve Size Percentage Passing
2-inch 100
1 ½-inch 90 - 100
3/4-inch 5 - 30
3/8-inch 5 - 20
No.200 0 - 4
4. Class 1 Bedding Material shall be used for City maintained utilities and shall have a durability index of not less than 30 and sand equivalent shall not be less than 40.
The material shall meet the following gradation requirements:
Sieve Size Percentage Passing
1-inch 100
3/4-inch 90 - 100
1/2-inch -
3/8-inch 20 - 55
No.4 0 - 10
No. 8 0 - 5
5. Controlled Low-Strength Material shall conform to the requirements of Section 5, Controlled Low-Strength Material.
6. Topsoil: Material that has been obtained at the site by removing soil to a depth not exceeding 2 feet. Removal of the topsoil shall be done after the area has been stripped of vegetation and debris.
D. See paragraph 2.2B hereinafter for imported materials corrosivity requirements.
1.2 UNSUITABLE MATERIAL
A. Unsuitable Material : Unsuitable soils for backfill material shall include soils which, when classified under ASTM D 2487, fall in the classifications of Pt, OH, CH, MH, or OL.
In addition, any soil that cannot be compacted sufficiently to achieve the percentage of maximum density specified for the intended use shall be classified as unsuitable material.
B. Chemical testing for corrosivity shall be performed for all materials proposed for use as backfill for metallic or reinforced concrete pipe. The testing shall be in accordance with the requirements of California Test Methods 532 and 643 of the California Department
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of Transportation. Backfill materials shall be considered unsuitable when the chloride concentration exceeds 500 ppm, sulfate concentration exceeds 1,500 ppm, resistivity is less than 2,000 ohm-cm or pH is less than 6.5. Testing shall be performed by a qualified laboratory as approved by the ENGINEER. The test results shall be submitted to the ENGINEER for acceptance during the submittal process.
C. Saturated native materials which are over optimum moisture content shall not be considered "unsuitable" simply because they are too wet for proper compaction. The CONTRACTOR shall, at its cost, prepare these materials in accordance with paragraph
3.9D. Alternatively, the CONTRACTOR may remove the native materials and provide imported backfill material, at no additional cost to the CITY.
1.3 USE OF SUITABLE BACKFILL MATERIAL TYPES
A. The CONTRACTOR shall use the types of materials as designated herein for all required backfill construction hereunder.
B. Backfill types shall be used in accordance with the following provisions:
1. Bedding shall be Class 2 Aggregate Base unless indicated otherwise on the plans.
2. Pipe zone backfill, as defined in paragraph 3.8 of this Section, shall consist of Class 2 Aggregate Base unless otherwise indicated on the plans.
3. Trench zone backfill for pipelines, as defined in paragraph 3.8, shall be Class 2 Aggregate Base unless otherwise indicated on the plans.
4. Trench backfill for pipelines under structures shall be the same material as used in the pipe zone, unless noted otherwise in the Contract Documents.
5. Final backfill, as defined in paragraph 3.8, shall consist of Class 2 Aggregate Base unless otherwise indicated on the plans.
6. Backfill around structures, vaults, and valve boxes shall be Class 2 Aggregate Base. At its option and without additional cost to the CITY, the CONTRACTOR may elect to use CLSM for backfill around structures in lieu of Class 2 Aggregate Base.
7. Backfill materials beneath structures shall be as follows:
a. Under structures where groundwater must be removed to allow placement of concrete or where soft bottom conditions are present, drain rock material shall be used with a geotextile fabric envelope (minimum 1-foot overlap) around the rock to prevent migration of fines.
b. In all other cases, Class 2 Aggregate Base materials shall be used.
8. Backfill used to replace pipeline trench overexcavation shall be a layer of drain rock material with a geotextile fabric envelope around the drain rock (minimum 1- foot overlap) to prevent migration of fines for wet or soft bottom trench conditions.
Backfill used to replace pipeline trench overexcavation shall be the same material as used for the pipe bedding if the trench conditions are not wet or soft, and a geotextile fabric envelope shall not be required.
9. Controlled low-strength material may be used for pipe bedding, pipe zone fill, and trench zone fill when approved by the ENGINEER or shown in the Contract Documents. Substitution for imported bedding or backfill material shall be at no additional cost to the CITY.
10. Foundation support materials shall be the same as defined for drain rock, shall be to the thicknesses identified in the Contract Documents, and shall be wrapped with a geotextile fabric envelope.
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PART 9 - EXECUTION
1.1 STRUCTURE EXCAVATION
A. General: Except when specifically provided to the contrary, excavation shall include the removal of all materials of whatever nature encountered, including all obstructions of any nature that would interfere with the proper execution and completion of the work. The removal of said materials shall conform to the lines and grades shown or ordered. Unless otherwise provided, the entire construction site shall be stripped of all vegetation and debris, and such material shall be removed from the site prior to performing any excavation or placing any fill. The CONTRACTOR shall furnish, place, and maintain all supports and shoring that may be required for the sides of the excavations, and all pumping, ditching, or other measures required for the removal or exclusion of water, including storm water, groundwater, and wastewater reaching the site of the work from any source so as to provide dry working conditions and to prevent damage to the work or adjoining property. Excavations shall be sloped or otherwise supported in a safe manner in accordance with applicable State safety requirements and the requirements of OSHA Safety and Health Standards for Construction (29CFR1926).
B. Excavation Beneath Structures, Manholes, Vaults, and Others : Except where otherwise specified for a particular structure or ordered by the ENGINEER, excavation shall be carried to the grade of the bottom of the bedding. Where indicated in the Contract Documents or ordered by the ENGINEER, areas beneath structures shall be overexcavated. When such overexcavation is shown, both overexcavation and subsequent backfill to the required grade shall be performed at the cost of the CONTRACTOR. When overexcavation is ordered by the ENGINEER, the CONTRACTOR shall be compensated on a unit price basis. The exposed surface shall be scarified to a depth of 6 inches, brought to optimum moisture content, and compacted to 95 percent of maximum density. Where overexcavation is ordered by the ENGINEER to place drain rock over wet or soft soils, scarification and recompaction shall not be performed.
1.2 PIPELINE AND UTILITY TRENCH EXCAVATION
A. General: Unless otherwise shown or ordered, excavation for pipelines and utilities shall be open-cut trenches. Trench widths shall be kept as narrow as is practical for the method of pipe zone densification selected by the CONTRACTOR, but shall have a minimum width at the bottom of the trench equal to the outside diameter of the pipe plus 8 inches. The maximum width at the top of the pipe shall be equal to the outside diameter of the pipe plus 12 inches.
B. Trench Bottom: The pipe bedding shall be given a final trim, using a string line for establishing grade, such that each pipe section when first laid will be continually in contact with the bedding along the extreme bottom of the pipe. Rounding out the trench to form a cradle for the pipe will not be required. Excavation for bell holes at pipe joints and for fittings shall be made as required.
C. Open Trench: The maximum amount of open trench permitted in any one location shall be 300 feet, or the length necessary to accommodate the amount of pipe installed in a single day, whichever is greater. All trenches shall be fully backfilled at the end of each
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day or, in lieu thereof, shall be covered by heavy steel plates adequately braced and capable of supporting vehicular traffic in those locations where it is impractical to backfill at the end of each day. Use of steel traffic plates is subject to the prior approval of the agency issuing the encroachment permit. Traffic plates shall be provided with non-skid coating and cold mix asphalt around the plate perimeter.
D. Foundation Support : When ordered by the ENGINEER, trenches shall be overexcavated beyond the depth shown. Such overexcavation shall be to the depth ordered. The trench shall then be backfilled to the grade of the bottom of the bedding.
The CONTRACTOR shall be compensated on a unit price basis in accordance with the bid item for overexcavation.
E. Overexcavation Not Ordered, Specified, or Shown: Any overexcavation carried below the grade ordered, specified, or shown shall be backfilled to the required grade with the specified material and compaction. Such work shall be performed by the CONTRACTOR at its own expense.
1.3 EXCAVATION IN LAWN AREAS
Where excavation occurs in lawn areas, the sod shall be carefully removed and stockpiled, watered, and preserved for replacement. Excavated material may be placed on the lawn, provided that a drop cloth or other suitable method is employed to protect the area from damage. The area shall not remain covered for more than 72 hours.
Immediately after completion of backfilling and testing of the pipeline, the sod shall be replaced in a manner so as to restore the lawn as near as possible to its original condition. CONTRACTOR shall provide new sod in kind if stockpiled sod has remained so for more than 72 hours.
1.4 EXCAVATION IN VICINITY OF TREES
Except where trees are shown to be removed, trees shall be protected from injury during construction operations. CONTRACTOR shall secure approval from the ENGINEER before cutting tree roots larger than 2 inches in diameter. The ENGINEER reserves the right to not allow cutting of roots greater than 2 inches in diameter and to order digging around the root in question. There is to be no additional payment for avoiding such roots.
All other roots that need to be cut shall be cut with a saw or pruning shears and shall be cleanly cut.
1.5 ROCK EXCAVATION
A. Rock excavation shall include removal and disposal of the following:
1. All boulders measuring 1/3 of a cubic yard or more in volume.
2. Concrete or masonry structures which have been abandoned, excluding concrete pavement sections.
3. Rock which exceeds medium rock hardness, as defined in Subsurface Manual for Design and Construction of Buildings," 1976, published by the American Society of Civil Engineers. These definitions are summarized in the following:
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ROCK HARDNESS CRITERIA
Very Hard Cannot be scratched with knife or sharp pick. Breaking of hand specimen requires several hard blows of geologist's pick.
Hard Can be scratched with knife or pick only with difficulty. Hard blow of hammer required to detach hand specimen.
Moderately Can be scratched with knife or pick. Gouges or Hard grooves to 1/4 inch deep can be excavated by hard blow of point of a geologist's pick. Hand specimens can be
detached by moderate blow.
Medium Can be grooved or gouged 1/16 inch deep by firm pressure on knife or pick point. Can be excavated in small chips to pieces about 1 inch maximum size by hard blows of the
point of a geologist's pick.
Soft Can be gouged or grooved readily with knife or pick point.
Can be excavated in chips to pieces several inches in size by moderate blows of pick point. Small thin pieces can be broken by finger pressure.
Very Soft Can be carved with knife. Can be excavated readily with point of pick. Pieces 1 inch or more in thickness can be broken with finger pressure. Can be scratched readily by fingernail.
Material exceeding medium rock hardness shall be excavated by mechanical means.
B. Explosives and Blasting: Blasting will not be permitted.
1.6 DISPOSAL OF EXCESS EXCAVATED MATERIAL
The CONTRACTOR shall remove and dispose of all excess excavated material at a suitable site(s) selected by the CONTRACTOR. The CONTRACTOR shall obtain all necessary fill and grading permits and a written release from property owners prior to use of said sites.
1.7 BACKFILL - GENERAL
A. Backfill shall not be dropped directly upon any structure or pipe. Backfill shall not be placed around or upon any structure until the concrete has attained sufficient strength to withstand the loads imposed.
B. Except for drain rock materials being placed in overexcavated areas or trenches, backfill shall not be placed until after all water is removed from the excavation.
1.8 PIPE AND UTILITY TRENCH BACKFILL
A. Pipe Zone Backfill : Pipe zone backfill shall be performed in accordance with the following requirements:
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1. The pipe zone is defined as that portion of the vertical trench cross-section lying between a plane 9 inches below the bottom surface of the pipe (i.e., the trench subgrade) and a plane at a point 12 inches above the top outside surface of the pipe bell. The bedding is defined as that portion of the pipe zone backfill material between the trench subgrade and a level line that varies from the bottom of the pipe to the spring line. The bedding for flexible pipe is defined as that portion of the pipe zone backfill material between the trench subgrade and the bottom of the pipe.
2. Bedding shall be provided for all pipelines, unless the pipe is installed using trenchless drilling methods.
3. After compacting the bedding the CONTRACTOR shall perform a final trim using a string line for establishing grade, such that each pipe section when first laid will be continually in contact with the bedding along the extreme bottom of the pipe.
Excavations for bell holes at each pipe joint shall be made as required.
4. The pipe zone shall be backfilled with the specified backfill material. The CONTRACTOR shall exercise care to prevent damage to the pipe and, if applicable, the pipeline coating and/or cathodic bonds during the installation and backfill operations. The CONTRACTOR shall hand shovel slice the bedding along the sides of the pipe in order to ensure filling any voids under the pipe haunches.
B. Trench Zone Backfill: After the pipe zone backfill has been placed as specified above, and after all excess water has completely drained from the trench, backfilling of the trench zone may proceed. The trench zone is defined as that portion of the vertical trench cross-section lying between a plane 12 inches above the top outside surface of the pipe bell and a plane at a point 18 inches below the finished surface grade, or if the trench is under pavement, 36 inches below the finished surface grade.
C. Sewer Warning Tape : Install warning tape per Section 17, General Piping, wherever pipe is installed by open-cut or spot repair construction methods.
D. Final Backfill: Final backfill is all backfill in the trench cross-sectional area within 18 inches of finished grade in landscaped or agricultural areas, or if the trench is under pavement, all backfill within 36 inches of finished grade. Final backfill for gravel roads or other areas shall be as indicated in the Contract Documents.
E. Final Backfill in Lawn Areas: The CONTRACTOR shall final backfill all excavations in areas within 18 inches of finished grade with topsoil. Said topsoil may be segregated from excavated materials or may be imported topsoil material. Sod or other surface improvements shall then be installed.
1.9 PLACING AND SPREADING OF BACKFILL MATERIALS
A. Backfill materials shall be placed and spread evenly in layers. The backfill layers shall be evenly spread so that each layer shall not exceed 8 inches in uncompacted thickness.
Backfill layers greater than 8 inches but no more than 12 inches may be used after the CONTRACTOR demonstrates to the ENGINEER a suitable compaction method that achieves required compaction levels.
B. During spreading, each layer shall be thoroughly mixed as necessary to promote uniformity of material in each layer. Pipe zone backfill materials shall be manually spread
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around the pipe so that when compacted, the pipe zone backfill provides uniform bearing and side support.
C. Where the backfill material moisture content is below the optimum moisture content, water shall be added before or during spreading until the proper moisture content for compaction is achieved.
D. Where the backfill material moisture content is too high to permit the specified degree of compaction, the material shall be bladed, aerated, or dried and/or mixed with suitable material with lower moisture content until the moisture content is satisfactory.
1.10 COMPACTION OF BACKFILL MATERIALS
A. Each layer of backfill material shall be mechanically compacted to the specified percentage of maximum density. Equipment that is consistently capable of achieving the required degree of compaction shall be used, and each layer shall be compacted over its entire area while the material is at the required moisture content.
B. Flooding, ponding, or jetting shall not be used.
C. Equipment weighing more than 10,000 pounds shall not be used closer to trench walls than a horizontal distance equal to the depth of the fill against the wall at that time. Hand- operated power compaction equipment shall be used where use of heavier equipment is impractical or restricted due to weight limitations.
D. Compaction Requirements : The following compaction requirements shall be in accordance with ASTM D 1557 for cohesive-type materials and in accordance with ASTM D 4253 and D 4254 for cohesionless, free-draining-type materials. Where agency, utility company, or encroachment permit requirements govern, the highest compaction standards shall apply.
Percentage of
Location or Use of Fill Maximum Density
Pipe zone backfill including bedding
and overexcavated zone 90
Trench zone backfill 95
Final backfill, beneath paved areas or
structures 95
Final backfill, in landscaped or
agricultural areas 90
Backfill beneath structures 95
Backfill around structures beneath paved areas 95
Backfill around structures in landscaped or
agricultural areas 90
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Topsoil 80
E. Trench Backfill Requirements : The pipe has been structurally designed based upon the trench configuration specified herein. The CONTRACTOR shall maintain the indicated trench cross-section up to a horizontal plane lying 12 inches above the top of the pipe.
1. If, at any location under said horizontal plane, the CONTRACTOR slopes the trench walls or exceeds the maximum trench widths indicated in the Contract Documents, the pipe zone backfill shall be improved, or the pipe class improved, at no additional cost to the CITY. "Improved" backfill shall mean controlled low- strength material or other materials acceptable to the ENGINEER.
2. If the allowable deflection specified for the pipe is exceeded, the CONTRACTOR shall expose and reround or replace the pipe, repair all damaged lining and coating, and reinstall the pipe zone material and trench backfill, as specified, at no additional expense to the CITY.
F. Shoring Removal: Shoring shall be removed as soon as the trench backfill has been placed and compacted to a level adequate to support the trench walls, unless otherwise indicated. Compaction of the backfill shall be continuous throughout the shoring removal process in order to minimize the potential creation of voids between trench walls and compacted trench backfill. Alternatively, voids created by removal of shoring may be filled by allowing low-density concrete placed on top of backfill to flow into the voids or by grouting with air-entrained concrete grout. Shoring shall be completely removed prior to compaction of the top 5 feet of trench depth.
1.11 TRENCH PLATES
When backfilling trenches and excavations, whether transverse or longitudinal, and the work cannot be properly completed within the same working day, trench plates with non-
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skid surface treatment will be required to maintain all vehicular, bicycle and pedestrian traffic flow. The following conditions shall apply:
1. All trench plates shall have a skid resistant surface treatment having a minimum coefficient of friction equivalent to 0.35 per California Test Method 342.
2. For trenches and excavation with spans greater than four feet (4), a structural design shall be prepared by a Civil Engineer licensed by the State of California.
Designs shall be submitted to the Engineer.
3. A Rough Road Sign (W33) shall be used in advance of all trench plates.
4. All trench plating shall be designed for HS20-44 Truck loading per the Caltrans Bridge Design Manual.
5. All steel trench plates shall extend beyond the edge of the trench wall a minimum of twelve inches (12).
6. All steel trench plates shall be fully supported around the perimeter to prevent tipping.
7. Trenches and excavations shall be adequately shored or braced to withstand highway traffic loads.
8. All trench plates shall be tack welded together at the end of each day.
9. All trench plates shall be pinned in each corner to prevent movement.
10. Temporary paving or cold-mix asphalt concrete (cutback) shall be placed around all edges of the trench plates.
11. A maximum of fifty (50) lineal feet of trench plating shall be allowed unless otherwise approved in writing by the Engineer.
12. Trench plates shall be minimum 1 ¼ inches thick.
13. Steel trench plate deformation my occur during loading; however, if a steel plate is deformed without loading to at least ½-inch per 8 feet of length, the plate shall be removed and replaced.
1.12 TEMPORARY PAVING
A minimum of 2 inches of cold- or hot-mix temporary asphalt shall be placed in finished trenches and rolled to a smooth surface at the end of each day unless final paving can be completed or steel plates are used to cover trenches in paved streets. Traffic plates shall be subject to the requirements of paragraph 3.2C. The temporary asphalt shall be placed within 1/4 inch of finished pavement grade.
END OF SECTION
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SECTION 5 CONTROLLED LOW-STRENGTH MATERIAL
PART 10 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall furnish all materials for controlled low-strength material (CLSM) in accordance with the provisions of this Section and shall mix, place, finish, and do all other work as required to produce a cementitious, hand- excavatable mixture of aggregate, cement, pozzolan, water, and admixtures used as pipe zone backfill, trench zone backfill, and structure backfill in accordance with the Contract Documents.
B. The CONTRACTOR is hereby advised that flotation or displacement of the pipe may occur during installation of the CLSM. The CONTRACTOR shall make necessary provisions to prevent flotation and ensure that the pipe is installed in accordance with the Contract Documents.
C. CLSM is also referred to as controlled density fill (CDF).
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
Commercial Standards
ACI 229 Controlled Low Strength Materials
ACI 232 Fly Ash/Other Pozzolans in Concrete
ASTM C 31 Practices for Making and Curing Concrete Test Specimens in the Field
ASTM C 39 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens
ASTM C 42 Standard Test Method for Obtaining and Testing Drilled Cores and Sawed Beams of Concrete
ASTM C 94 Specifications for Ready-Mixed Concrete
ASTM C 150 Specification for Portland Cement
ASTM C 260 Specification for Air-Entraining Admixtures for Concrete ASTM C 494 Specification for Chemical Admixtures for Concrete ASTM C 618 Specification for Fly Ash and Raw or Calcined Natural Pozzolan for Use as a Mineral Filler in Portland Cement Concrete
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ASTM D 1586 Method of Penetration Test and Split Barrel Sampling of Soils
ASTM D 1633 Test Method for Compressive Strength of Molded Soil- Cement Cylinders
ASTM D 2922 Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow-Depth)
1.3 CONTRACTOR SUBMITTALS
Mix Design: Prior to beginning the WORK, the CONTRACTOR shall submit to the ENGINEER, for review, CLSM mix designs which shall show the proportions and gradations of all materials proposed for each class and type of CLSM specified herein. The mix designs shall be tested by an independent testing laboratory for properties specified herein. The results of the independent testing laboratory shall be submitted with the CLSM mix designs. All costs related to such testing shall be borne by the CONTRACTOR.
1.4 QUALITY ASSURANCE
A. General:
1. All testing during the WORK will be done by a testing laboratory of the CITYs choice at the CITYs expense, except as otherwise noted.
2. In case the test of the CLSM shows noncompliance with the specifications, the CONTRACTOR shall accomplish such remedy as may be required to ensure compliance. Subsequent testing to show compliance shall be by a testing laboratory selected by the CITY and shall be at the CONTRACTORs expense.
B. Density: The installed density of the material will be determined in accordance with ASTM D 2922.
C. Compressive Strength : The compressive strength will be determined in accordance with ASTM C 39.
PART 11 - PRODUCTS
1.1 CLSM shall be hand-excavatable mixture of cement, pozzolan, coarse and fine aggregate and water that has been mixed in accordance with ASTM C 94.
1.2 USE OF CLSM
CLSM for trench backfill may have lesser slump provided that specified strength requirements are met.
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1.3 CEMENT
Cement shall be Type II in accordance with the requirements of ASTM C 150.
1.4 POZZOLAN
Pozzolan shall be added to improve the flowability and shall be Type F in accordance with the requirements of ASTM C 618.
1.5 AGGREGATE
Coarse aggregate shall consist of a well-graded mixture of crushed rock, soil, or sand with a maximum size aggregate of 3/8 inch. One hundred percent (100%) shall pass the ½-inch sieve. Not more than 30 percent shall be retained by the 3/8-inch sieve and not more than 12 percent shall pass the No. 200 sieve. All material shall be free from organic matter and not contain more alkali, sulfates, or salts than the native materials at the site of the WORK.
1.6 ADMIXTURES
A. Air entraining admixtures shall be added to improve the workability and shall be in accordance with the requirements of ASTM C 260.
B. Water reducing agent shall be added to improve the workability and shall be in accordance with the requirements of ASTM C 494.
1.7 WATER
Water shall be potable, clean, and free from objectionable quantities of silty organic matter, alkali, salts, and other impurities.
1.8 CONTROLLED LOW-STRENGTH MATERIAL
A. CLSM shall be a mixture of cement, pozzolan, coarse and fine aggregate, admixtures, and water batched by a ready-mix concrete plant and delivered to the WORK by means of standard, transit mixing trucks. The mixture shall produce a cementitious hand-excavatable material. The material supplied shall be Controlled Density Fill supplied by Pozzolanic International, Flowable Compacting Fill by RMC Lonestar, or approved equal.
B. The actual mix proportion, slump, and water-reducing agent shall be determined by the CONTRACTOR to meet the uses specified herein.
C. The entrained air content shall be a minimum of 8 percent and a maximum of 20 percent as required by the CONTRACTOR to meet the uses specified herein.
D. The mix design shall consist of 2 sacks cement.
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E. The minimum 28-day compressive strength shall be 50 psi, and the maximum 28-day compressive strength shall be 150 psi.
PART 12 - EXECUTION
1.1 PREPARING PLACEMENT FOR CLSM
The subgrade and compacted fill and/or trench to receive CLSM shall be complete and acceptable in accordance with Section 4, Earthwork.
1.2 MIXING AND DELIVERING CLSM
A. CLSM shall be batched by a ready-mix batching plant acceptable to the ENGINEER.
B. CLSM shall be delivered to the WORK in standard transit mix trucks.
1.3 PLACING CLSM
A. CLSM shall be delivered in place by means of tailgate discharge, conveyor belts, pumped in place, or other means acceptable to the ENGINEER.
B. CLSM shall be directed in place by means of a vibrator to ensure that all voids, crevices, and pockets are filled with CLSM. Care shall be taken to avoid over- consolidation of the material. The CLSM shall be thoroughly settled and compacted through the entire depth of the layer that is being consolidated into a dense, homogeneous mass.
C. CLSM shall be continuously placed against fresh material, unless otherwise approved by the ENGINEER. Where new CLSM must be placed against existing CLSM, the placement shall be clean of all loose and foreign material. The surface of existing CLSM shall be soaked a minimum of one (1) hour before placement of fresh CLSM. No standing water will be allowed before starting placement of fresh CLSM.
1.4 FINISHING CLSM
The finish surface of CLSM shall be smooth and to the grade shown or directed by the ENGINEER. Finishing by wood float, steel trowel, or other similar methods is not required.
1.5 PROTECTING CLSM
CLSM shall be protected from running water, rain, freezing, or other conditions that could damage the material until the material has been accepted and final fill complete.
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1.6 TRENCH BACKFILL
A. No equipment, traffic, or backfill shall be allowed on the CLSM until the surface of the CLSM is able to withstand a 20 psi load without displacement or damage.
If necessary, the CONTRACTOR shall provide steel trench plates that span the trench, as specified in Section 4, Earthwork, until the CLSM has reached the required strength.
END OF SECTION
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SECTION 6 PIPEBURSTING
PART 13 - GENERAL
1.1 THE REQUIREMENT
This specification covers the work necessary to furnish and install, complete and in place, high-density polyethylene pipe (HDPE) by the pipebursting method, as shown on the drawings and specified herein. The CONTRACTOR shall provide all materials, labor, equipment, and services necessary for bypass pumping and/or diversion of sewage flows, installation of HDPE pipe, reconnection of active sewer laterals, and CCTV inspection and testing of the completed pipe system.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. The following references are part of this Specification. In case of conflict between the requirements of this Specification and those of the listed documents, the requirements of this Specification shall prevail. The latest edition of the following references shall be used:
ASTM D1248 Polyethylene Plastics Molding and Extrusion Materials ASTM D2657 Heat Joining of Thermoplastic Pipe and Fittings ASTM D3035 Polyethylene Plastic Pipe (SDR-PR) Based on Controlled Outside Diameter
ASTM D3261 Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
ASTM D3350 Polyethylene Plastic Pipe and Fittings Materials ASTM F714 Standard Specification for Polyethylene Plastic Pipe Based on Outside Diameter
1.3 CONTRACTOR SUBMITTALS
A. Shop Drawings.
1. The CONTRACTOR shall submit catalog cuts, specifications, dimensioned drawings, installation details and sketches, and other pertinent information for the HDPE pipe installation work. All materials provided shall be fully in accordance with the requirements of the reference specifications specified above.
2. The CONTRACTOR shall verify with the pipe manufacturer all connection details.
3. The CONTRACTOR shall submit detail drawings and a written description of the construction procedure and sequence to bypass sewage flow, install pipe, and reconnect sewer laterals.
B. Certification. The CONTRACTOR shall furnish a certified affidavit of compliance for all HDPE pipe and fittings furnished confirming that the materials supplied fully conform to
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the requirements specified herein and are compatible with the pipebursting equipment and installation method.
C. The CONTRACTOR shall perform trial fusion welds and submit samples to the ENGINEER for review prior to installation of the pipe. Full penetration welds shall provide a homogeneous material across the cross section of the weld. The fusion machine employed for the trial welds shall be the same machine to be utilized for the installation work.
D. Only technicians whom the pipe manufacturer or supplier has certified and who have a minimum of two (2) years of experience fusion welding 8-inch or larger diameter pipelines shall operate fusion equipment. Submit documentation on the technician's experience shall be documented in the HDPE pipe submittal.
E. CONTRACTOR shall submit pre-construction video inspection tapes and logs to the ENGINEER at least five (5) days before start of pipebursting work on any specific line.
1.4 QUALITY ASSURANCE
A. Quality assurance procedures shall be performed by the pipe manufacturer fully in accordance with the requirements of Section 19, High-Density Polyethylene Pipe. The certification shall include certified laboratory data confirming that said tests have been performed on a sample of the pipe to be provided under this contract, or pipe from that production run, and that satisfactory results were obtained.
B. Fusion joining and other procedures necessary for correct assembly of the polyethylene pipe shall be done only by personnel trained in those skills to the satisfaction of the ENGINEER and the pipe supplier, in accordance with the requirements of Section 19, High-Density Polyethylene Pipe.
C. Pipe insertion equipment shall be operated only by technicians who have a minimum of three years experience in the installation of the pipe material as specified herein. The technician's experience shall be documented in the HDPE pipe submittal.
D. The CONTRACTOR shall televise the installed pipe after existing services have been reconnected and manhole work has been completed. The original television inspection videotape shall be provided to the ENGINEER.
1.5 WARRANTY
A. The CONTRACTOR shall provide to the CITY a warranty to be in force and effect for a period of one (1) year from the date of final acceptance by the CITY. The warranty shall require the CONTRACTOR to repair or replace the pipe should leakage, separation, collapse or other failure result from faulty materials or installation as determined by the ENGINEER.
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PART 14 - PRODUCTS
1.1 GENERAL
The CONTRACTOR shall provide high-density polyethylene pipe as specified in Section
19. 1.2 JOINTS
High-density polyethylene pipe shall be joined by butt fusion welding, as specified in Section 19.
1.3 LATERAL SEWER CONNECTIONS
Lateral sewers shall be connected to the main line by installation of an Inserta Wye fitting consisting of a PVC hub, rubber sleeve and stainless steel band, as manufactured by Inserta Tee.
1.4 LUBRICATION
The pipe bursting equipment shall include a bentonite or polymer slurry lubrication system in accordance with the pipe bursting equipment manufacturers recommendations, to reduce friction developed on the surface of the replacement pipe during insertion. Maintain an envelope of bentonite or polymer slurry as required around the exterior of the pipe during the pipe bursting operation to reduce the exterior friction and the possibility of the pipe seizing in place.
PART 15 - EXECUTION
1.1 GENERAL
The CONTRACTOR shall protect facilities from damage by forces generated by the pipe bursting equipment. Surface heave shall be limited to one-half inch (1/2) after allowing one week for settling. If heave occurs in excess of this amount, the CONTRACTOR shall remove the heaved area to a depth below the finished grade of the existing pavement equal to the thickness of the asphalt section and repave. The costs for this work shall be included in the unit cost for pipe bursting. Any surface cracks caused by the pipe bursting work in areas where pavement is not required to be replaced shall be crack sealed. Removal areas shall be a minimum of four feet wide.
The CONTRACTOR may elect (at own cost) to sawcut a single cut along the pipeline alignment as a surface heave countermeasure. If the heave is less than one-half inch, the sawcut shall be joint sealed. If contractor chooses to do a double sawcut on either side of the pipeline, the pavement between the sawcuts shall be removed and replaced at the CONTRACTORs own expense.
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1.2 PREPARATION
A. All work shall be performed as specified herein and supervised by personnel experienced in the installation of the pipe.
B. Each line to be replaced by pipebursting shall be inspected by closed-circuit television inspection prior to the start of work on each line to assure that existing conditions are conducive to pipebursting and to locate active service laterals.
1.3 HANDLING AND STORAGE
A. The CONTRACTOR shall exercise special care during the unloading, handling, and storage of all high-density polyethylene pipe to ensure that the pipe is not cut, gouged, scored or otherwise damaged. Any pipe segment that has cuts in the pipe wall exceeding 10 percent of the wall thickness shall be cut out and removed from the site at the CONTRACTOR's cost. The pipe shall be stored so that it is not deformed axially or circumferentially which may hinder pipe installation.
B. High-density polyethylene pipe without an ultraviolet inhibitor shall not be stored uncovered outside.
1.4 BYPASS PUMPING
A. The CONTRACTOR shall provide bypass pumping and/or diversion when required for acceptable completion of the pipe installation. Bypass pumping shall consist of furnishing, installing, and maintaining all power, primary and standby pumps, appurtenances and bypass piping required to maintain existing flows and services, and shall be in accordance with the requirements of Section 3, Bypassing Wastewater.
B. Bypass pumping shall be done in such a manner as not to damage private or public property, or create a nuisance or public menace. The pumped sewage shall be in an enclosed hose or pipe that is adequately protected from traffic, and shall be redirected into a sanitary sewer system. Dumping or free flow of sewage on private property, gutters, streets, sidewalks, or into storm sewers is prohibited. The CONTRACTOR shall be liable for all cleanup, damages, and resultant fines in the event of a spill. After the work is completed, flow shall be returned to the replaced sewer and all temporary equipment removed.
C. The CONTRACTOR shall take all necessary precautions to ensure that no private properties are subjected to a sewage backup or spill.
D. The CONTRACTOR shall pump out or otherwise positively drain all locations, a minimum of once every 24 hours, where the building sewer is disconnected from the main sewer for more than one day. More frequent pumping shall be used in locations where wastewater flows exceed the capacity of temporary storage provided by the CONTRACTOR.
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1.5 POINT REPAIRS
The CONTRACTOR shall repair the pipe where point repairs are identified on the plans.
If this is not shown, it will constitute extra work when approved by the ENGINEER. The work shall include verifying the location of the point repair, locating all interfering utilities, temporary flow bypassing, traffic control, excavation, shoring, dewatering, pipe repairs or replacement, backfilling, and surface restoration.
1.6 PIPE INSTALLATION
A. The CONTRACTOR shall install the pipe by utilizing a constant tension system with a hydraulic or pneumatic bursting device that breaks apart the existing pipe. The void created by the bursting device shall be sufficient in size to accommodate the HDPE pipe, which shall be installed immediately after the void has been formed.
B. The CONTRACTOR shall utilize existing manholes where practical, unless indicated otherwise. Manhole inverts and bottoms shall be removed to permit access for installation equipment.
C. The CONTRACTOR shall anchor the pipe to concrete structures or manholes after the pipe has been installed along the length of sewer replaced. The CONTRACTOR shall use a water stop or flange adaptor, as supplied by the pipe manufacturer, which is firmly seated perpendicular to the pipe axis, around the pipe exterior and cast into the structure base or near the structure wall center. The structure or manhole connection shall be made a minimum of 12 hours after pipe insertion.
1.7 PIPE TESTING
A. The CONTRACTOR shall successfully pressure test the installed pipe, in accordance with the requirements of Section 12, Sanitary Sewer System Testing.
B. The CONTRACTOR shall mandrel test the installed pipe, in accordance with the requirements of Section 12, Sanitary Sewer System Testing.
1.8 RECONNECTION OF SEWER LATERALS
A. The CONTRACTOR shall excavate, expose, and isolate all sewer lateral connections prior to replacing the existing sewer. The existing connections may be encased in mortar, concrete, or reinforced concrete. There will be no additional compensation for demolition of this concrete.
B. The CONTRACTOR shall successfully test the installed pipe prior to reconnecting sewer laterals.
C. All sewer laterals that are determined by the CONTRACTOR to be active shall be connected by installation of an Inserta Wye fitting in accordance with pipe manufacturer's recommendations. Fitting shall be tested prior to reconnection of active sewer laterals.
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1.9 FINAL CLEANING AND TELEVISION INSPECTION
A. Prior to final acceptance and final inspection of the pipe by the ENGINEER, the CONTRACTOR shall flush and clean all parts of the system by removing all accumulated construction debris, rocks, gravel, sand, silt, and other foreign material from the pipe.
B. After completion of the pipe installation, service reconnections, finish work at the manholes and final cleaning, the sewer shall be televised in accordance with Section 14.
All inspection video shall be submitted to the City.
END OF SECTION
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SECTION 7 SHORING
PART 16 - GENERAL
1.1 THE REQUIREMENT
A. The WORK specified in this section includes shoring systems for the support of excavations including, but not limited to, trench and structure excavations. The CONTRACTOR shall furnish, install, and remove upon completion of the required construction, all systems of supports, including all bracing and associated items to retain the sides of the excavations. The CONTRACTOR shall select the methods, design, construct, and remove all shoring systems.
1.2 REFERENCE CODES, REGULATIONS, SPECIFICATIONS, AND STANDARDS A. Reference codes, regulations, specifications, and standards include, but are not limited to:
1. Commercial Standards:
ASTM A 328 Specification for Steel Sheet Piling
2. Codes:
a. California Labor Code
b. Occupational Safety and Health Administrative Code
B. The CONTRACTORs attention is directed to the provisions for Shoring and Bracing Drawings in Section 6705 of the California Labor Code. The CONTRACTOR, prior to beginning any trench or structure excavation exceeding 5 feet in depth, shall submit to the ENGINEER and shall be in receipt of the ENGINEERs written acceptance of the CONTRACTORs detailed plan showing design of all shoring, bracing, sloping of the sides of excavation, or other provisions for workers protection against the hazard of caving ground during the excavation of such trenches or structure excavation. Plans shall be prepared and sealed by a civil or structural engineer registered in the State of California.
1.3 DESIGN CRITERIA
A. General: In all areas, the shoring system, including all the components, shall be designed by the CONTRACTOR to support earth and rock pressure, unrelieved hydrostatic pressures, utility loads, equipment, applicable traffic and construction loads, and other surcharge loads in such manner as to allow the safe and expeditious construction of the permanent structures without movement or settlement of the ground and to prevent damage to or movement of adjacent structures and utilities. Shoring systems shall meet the following minimum performance requirements and design criteria.
1. Comply with all governing regulations pertaining to excavation safety (e.g., the most current edition of Cal/OSHA construction safety orders, article 6).
2. Be compatible with the surface and subsurface soil and groundwater conditions mapped and encountered and resist lateral earth pressures and hydrostatic pressures (where not dewatered).
3. Protect personnel that enter the excavation.
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4. Protect existing utilities, pavements, and structures.
5. Installation of the shoring system must occur in a manner and sequence that does not damage existing structures, pavements, and utilities including through settlement, heave or vibrations.
6. Prevent caving (i.e., raveling, running, or flowing) or lateral movement of excavation walls and associated loss of adjacent ground and adjacent ground surface settlement, even when subjected to construction vibrations.
7. Provide stable excavation walls and bottom (e.g., prevent bottom heave).
8. As permitted by the specifications, allow for removal or abandonment of shoring in a manner and sequence that (1) is in step with the backfilling sequence (i.e., shoring should not be removed ahead of backfilling) and (2) does not damage the finished pipeline or structures or existing structures, pavements, and utilities including through settlement, heave or vibrations.
9. Resist lateral earth pressures including those from hydrostatic pressures and lateral loads from vehicular traffic, construction equipment and spoils.
10. Special shoring and/or ground improvement, including grout stabilization may be required and designs shall be provided by the CONTRACTOR, where excavations are in close proximity to structures, utilities, or unlined drainage to minimize potential excavation-related damage. Special shoring and/or ground improvement designs shall be required where excavations are:
a. Within an imaginary plane protected downward at an inclination of 2H:1V from the nearest foundation edge or pipeline.
b. Below the depth of flow within adjacent unlined drainageways. c. Experiencing flowing, running and/or raveling ground conditions (i.e., soils with little to no stand-up time).
11. The CONTRACTOR shall design each member to support the maximum loads that can occur during construction. For the purpose of this Section, the design load means the maximum load the support member of the shoring system will have to carry in actual practice.
12. The submittals shall provide design calculations for each stage of the excavation, including installation and removal of the shoring system. The CONTRACTOR shall submit all design assumptions and design criteria, as well as references for the design criteria and assumptions used. The strut preloading procedure, including information on the jacking system and calibration data for the hydraulic jacks, shall also be submitted for review.
13. The CONTRACTOR shall design the bottom of the support system to be carried to a depth below the main excavation adequate to prevent excessive lateral and vertical movements and ensure stability of the excavation.
14. Review of the CONTRACTORs plans and methods of construction shall not relieve the CONTRACTOR of its responsibility to provide an adequate support system to support all load configurations encountered to complete the required WORK.
15. The struts shall be preloaded to fifty percent (50%) of the design load. Preloading shall be accomplished by jacking between the struts and wales. Provisions shall be made for permanently fixing each member, after preloading, with steel shims or wedges welded in place. Wood wedges shall not be allowed.
16. The sequence of excavation, installation, and removal of the shoring and preloading of the struts shall be carried out in a manner such that lateral movement and settlement of the soil surrounding the excavations is minimized.
17. The vertical spacing of the struts shall not exceed 10 feet.
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18. Sheet piles, if used, shall penetrate into underlying stiff clays a minimum distance of 5 feet to provide positive cut-off against underseepage. In areas where sand deposits are present below stiff clays, the sheet piles shall penetrate through the sand sediments to reach into the stiff clays for a minimum distance of 5 feet.
19. Wales shall bear tightly against the sheet pile walls. Where necessary, steel wedges shall be installed or other appropriate means used to transfer loads between the wales and the sheet pile walls. The wedges shall be secured by welding.
B. The CONTRACTOR shall review the existing underground utilities. CONTRACTOR shall make its own interpretation regarding the ground conditions as described in the project soils boring logs, and shall make any other additional surveys and/or borings necessary to determine the types and extent of sloping, bracing, and shoring system(s) required to accomplish the WORK. All of the foregoing costs shall be included in the CONTRACTORs total price for performing the WORK.
C. Sloped excavations shall not be permitted, unless otherwise approved by the ENGINEER.
1.4 CONTRACTOR SUBMITTALS
A. The CONTRACTOR shall provide submittals of excavation support systems. The submittals shall be prepared and sealed by a civil or structural engineer registered in the State of California. The shoring submittal shall be submitted to the ENGINEER at the same time as the dewatering submittal.
1. The CONTRACTOR, prior to beginning any trench or structure excavation 5 feet deep or over, shall submit to the ENGINEER and shall be in receipt of the ENGINEERs written acceptance of the CONTRACTORs detailed plan showing design of all shoring, bracing, sloping of the sides of excavation, or other provisions for worker protection against the hazard of caving ground during the excavation of such trenches or structure excavation. The CONTRACTORs attention is directed to the provisions for Shoring and Bracing Drawings in Section 6705 of the California Labor Code. A civil or structural engineer licensed by the State of California shall prepare plans.
2. The CONTRACTOR shall prepare and submit drawings and supporting calculations showing proposed shoring systems. The submittals shall include details, arrangements, and the method of construction for the proposed piling system, including levels of struts and shores, as applicable, and permissible depth to which excavation may be carried before supports are installed.
3. The submittal shall show the full excavation depth load to be carried by various members of the support system and, as required, the preloads. Design calculations shall include design surcharge loads and calculated deflections of shoring and support members.
4. The CONTRACTOR shall submit proposed method of installing shoring, including the sequence of driving, template, and driving equipment description. The proposed construction sequence, including strut placement and strut and shore removal, as related to excavation, construction and backfilling operations, shall be shown.
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B. All expenses incurred in performing the WORK described in this Section shall be borne by the CONTRACTOR.
1.5 JOB CONDITIONS
A. Provision for Contingencies:
1. The CONTRACTOR shall provide contingency plans or alternative procedures to be implemented if unfavorable shoring system performance is evidenced.
2. The CONTRACTOR shall keep on hand materials and equipment necessary to implement contingency plan.
B. The CONTRACTOR shall proceed with caution in areas where utilities are within the shoring and excavation prism. Such utilities shall be exposed by hand excavation or other methods acceptable to the CITY.
C. If existing utilities interfere with proposed method of support, the CONTRACTOR shall modify the support system at its own expense.
1.6 TOLERANCES
A. Location of the necessary shoring shall be within 3 inches, vertically and horizontally, of that shown on the shop drawings.
B. In the areas adjacent to existing facilities, the excavation shoring system shall deflect vertically and/or horizontally no more than 1 inch from its original position.
PART 17 - PRODUCTS
1.1 PRODUCTS
A. All timber and structural steel used for the supporting system, whether new or used, shall be sound and free from defects that may impair their strength.
B. Sheet piling shall be of a continuous-interlocking type forming a continuous wall. Sheet piling and all accessories shall conform to the requirements of ASTM A 328.
PART 18 - EXECUTION
1.1 INSTALLATION
A. Excavation support shall be installed as indicated in the approved submittals.
B. Excavations, including trenching, shall not begin until the excavation support submittals have been accepted and until the materials necessary for the installation are on site.
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1.2 STEEL SHEET PILING
A. The CONTRACTOR shall drive sheet piling to the depth indicated in the submittals, with the bulbs preceding the sockets, in a plumb position, with each pile interlocked with adjoining piles for its entire length so as to form a continuous diaphragm throughout the length of each run of wall, bearing tightly against original ground.
B. The CONTRACTOR shall exercise care in driving to avoid damage to existing utilities so that interlocking members can be subsequently extracted without injury to adjacent fills or existing utilities.
C. The method of driving, cutting, and splicing shall conform to the CONTRACTORs submittals.
D. The CONTRACTOR shall maintain a sufficient quantity of material on hand for sheeting, shoring, bracing, and other operations to protect the WORK and for use in case of emergency.
1.3 INTERNAL BRACING SUPPORT SYSTEM
A. The CONTRACTOR shall provide internal bracing support system, including lagging and sheeting, sheet piles, wales, struts, and/or shores.
1. All struts with intermediate bracing shall be provided as needed to enable them to carry maximum design load without distortion or buckling.
2. All web stiffeners, plates, or angles shall be provided as needed to prevent rotation, crippling, or buckling of connections and points of bearing between structural steel members that allow for eccentricities caused by field fabrication and assembly.
B. The CONTRACTOR shall install and maintain all bracing support members in tight contact with each other and with the surface being supported. Support system monitoring provisions shall be installed as indicated on the favorably reviewed shop drawings.
C. If necessary to control shoring movement, the CONTRACTOR shall preload bracing members by jacking struts to fifty percent (50%) of the design load. Preload bracing members shall be loaded in accordance with methods, procedures, and sequence as described on the favorably reviewed shop drawings. Excavation work shall be coordinated with the installation or bracing and preloading. Steel shims and steel wedges welded or bolted in place to maintain the preloading force shall be used in the bracing after release of the jacking equipment pressure.
1. Procedures that produce uniform loading of bracing members to avoid eccentricities or overstressing and distortion of members of wall system shall be used.
2. Preloading system shall include a method to measure the amount of preload induced into bracing members to within five percent (5%).
D. Excavation shall proceed to no more than 2 feet below point of the support about to be placed. The support shall be installed and preloaded immediately after installation and prior to continuing excavation.
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1.4 REMOVAL OF SUPPORTING SYSTEM
The CONTRACTOR shall remove shoring, including sheet piles, wales, struts, lagging, and shores from the excavation unless indicated otherwise. Removal of the supporting system shall be performed in a manner that avoids damage of adjacent construction or facilities. All voids created by the removal of the supporting system shall be immediately filled with well-graded cohesionless sand, lean concrete, or sand cement grout. If soldier piles, sheet piles, and caissons cannot be removed without damaging adjacent construction or facilities, each element shall be removed to a depth of 5 feet below the ground surface, or to a point 1 foot above the crown of the pipe, whichever is less; the soldier piles, sheet piles, or caissons shall be left in place below the point of removal.
END OF SECTION
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SECTION 8 ASPHALTIC CONCRETE PAVING
PART 19 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall perform all work associated with asphaltic concrete (AC) pavement and base in accordance with the Contract Documents, including all labor, materials, equipment, supplies, and facilities associated with providing a finished product satisfying all the requirements of the Contract Documents and the various encroachment permit requirements of agencies having right-of-way jurisdiction, whichever are more stringent.
B. CONTRACTOR shall replace all asphalt concrete pavement damaged or demolished while performing the Work under this contract to pre-existing conditions.
C. All pavement areas that are not required to be repaved shall be protected by the CONTRACTOR. Such areas shall not be damaged in anyway and shall be fully restored to the pre-construction condition at the CONTRACTORs expense. Pictures of the existing roadways shall be taken prior to work to document the pre-construction condition.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
C. Commercial Standards:
AASHTO M 82 Cut-Back Asphalt (Medium Curing Type).
AASHTO M 140 Emulsified Asphalt.
AASHTO M 208 Cationic Emulsified Asphalt.
AASHTO M 226 Viscosity Graded Asphalt Cement.
AASHTO T 209 Maximum Specified Gravity of Paving Mixtures.
ASTM D 242 Specification for Mineral Filler for Bituminous Paving Mixtures.
ASTM D 692 Specification for Coarse Aggregate for Bituminous Paving Mixtures.
ASTM D 977 Specification for Emulsified Asphalt.
ASTM D 1073 Specification for Fine Aggregate for Bituminous Paving Mixtures.
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ASTM D 1188 Test Method for Bulk Specific Gravity and Density of Compacted Bituminous Mixtures Using Paraffin-Coated
Specimens.
ASTM D 1557 Test Methods for Moisture-Density Relations of Soils and Soil - Aggregate Mixtures Using 10-lb (4.54-kg) Rammer and 18-in (457-mm) Drop.
ASTM D 2397 Specification for Cationic Emulsified Asphalt.
ASTM D 3381 Specification for Viscosity-Graded Asphalt Cement for Use in Pavement Construction.
ASTM D 3515 Specification for Hot-Mixed, Hot-Laid Bituminous Paving Mixtures.
D. State Standard Specifications (2015):
Section 26 Aggregate Bases
Section 37 Bituminous Seals
Section 39 Asphalt Concrete
Section 92 Asphalts
Section 93 Liquid Asphalt for Prime Coat
Section 94 Asphaltic Emulsions
1.3 CONTRACTOR SUBMITTALS
A. Certificate of Compliance of Proposed Materials : Certificate of Compliance with the specifications shall be provided prior to start of the WORK. The Certificate of Compliance shall identify the name of the material, aggregate source, name of the supplier, contract number, and the segment of the WORK where the material represented by the sample is to be used. Results of all tests shall be submitted to the ENGINEER for approval.
Materials to be tested shall include aggregate base, coarse and fine aggregate for paving mixtures, mineral filler, liquid asphalt, asphaltic binder, and asphalt concrete mixture properties in accordance with State Standard Specifications and theoretical maximum asphalt concrete density in accordance with AASHTO T 209.
B. Load Slips. The CONTRACTOR shall submit batch data and load slips to the Engineer as asphalt is delivered to the project site to allow verification of location and use.
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PART 20 - PRODUCTS
1.1 AGGREGATE BASE
Materials for aggregate base shall be Class 2 Aggregate Base material, as specified in Section 4, Earthwork.
1.2 PRIME COAT
Material shall be Grade SC-70 liquid asphalt complying with the requirements of State Standard Specification Section 93.
1.3 TACK COAT
Tack coat shall be SS-1H, furnished and applied in conformance with the provisions of Section 94, Asphaltic Emulsions, of the State Standard Specifications.
1.4 ASPHALT BINDER
Asphalt binder to be mixed with the mineral aggregate shall be steam-refined paving asphalt Type PG 64-10 conforming to Section 92 of the California State Standard Specifications.
1.5 AGGREGATE MIXTURE
Aggregate for asphalt concrete placed in City streets shall conform to 1/2-inch Type A HMA specified in Section 39 of the California State Standard Specifications.
Sieve Size Total Percent Passing by Weight
3/4 inch 100
1/2 inch 95-99
3/8 inch 75-95
No. 4 55-66
No. 8 38-49
No. 30 15-27
No. 200 2.0-8.0
1.6 ASPHALT-AGGREGATE MIXTURE
A. Mixture Test Criteria : The asphalt-aggregate mixture shall meet the following test criteria:
Stability (Hveem): 37 min.
Swell (Hveem Method): 0.030 inch max.
Air Voids: 4 percent max.
Voids in Mineral Aggregate: 14 percent min.
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B. Asphalt-Aggregate Mixture Tolerances : The following tolerances for the job-mix formula will be allowed per single test:
Passing Sieve Percent
1/2 inch ±6
3/8 inch ±6
No. 4 ±7
No. 8 ±5
No. 30 ±4
No. 200 ±2
Asphalt Content, Wt. percent by weight of total mixture ±0.45 Results of single extraction and sieve tests shall not be used as the sole basis for acceptance or rejection of the mixture. Any variation from the job-mix formula greater than the tolerances shown above shall be investigated and the conditions causing the variations corrected.
PART 21 - EXECUTION
1.1 GENERAL PAVING AND GRADING
A. Where pavement restoration is required due to excavation, the pavement section shall be restored to the as-built section. In no case shall the section be less than that indicated in the Contract Documents.
B. Longitudinal and transverse conforms between existing pavement and newly constructed pavement shall be made by cutting the existing pavement to a neat, smooth line at the conform line and constructing a vertical-face butt joint.
C. Adjustment of Iron. Valve boxes, survey monument boxes, manholes, cleanouts, and blowouts shall be brought to finished grade after the final pavement lift has been installed.
D. If removal of road section for piping or structures results in more than 50 percent of road area being removed in any 100 foot length, the entire road section shall be removed and replaced in accordance with the Contract Documents.
E. A drop off of more than 0.15-foot will not be allowed at any time between adjacent to traveled lanes of asphalt concrete surfacing, unless approved by the Engineer.
F. Where trenches are within 3 feet from the curb, lip of the gutter or the edge of the pavement, the CONTRACTOR shall remove and replace the pavement to the curb, lip of the gutter or the edge of the pavement.
G. Failed pavement adjacent to the trench shall be removed and replaced by the CONTRACTOR. Any pavement damaged by the CONTRACTOR shall be removed and replaced by the CONTRACTOR.
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H. All residents or merchants in each area to be paved shall be notified by the CONTRACTOR at least 72 hours in advance of the paving work. Each notice shall indicate the approximate duration that the road will be closed.
1.2 TIMING OF FINAL PAVEMENT
Final pavement shall be installed within fourteen (14) days of successful testing as described in Section 12, Sanitary Sewer System Testing, of each sewer reach.
1.3 SUBGRADE PREPARATION
The subgrade shall be prepared as specified in Section 4, Earthwork. The surface of the subgrade after compaction shall be hard, uniform, smooth, self-draining, and true to grade and cross-section. Subgrade for pavement shall not vary more than 0.02 foot from the specified grade and cross-section. Subgrade for base material shall not vary more than 0.04 foot from the specified grade and cross-section.
1.4 PREPARATION OF EXISTING AC PAVEMENT
The edge of existing AC pavement shall be sawcut to provide a smooth joint for new pavement. The CONTRACTOR may saw cut or mechanically grind the pavement before excavating to facilitate removal of pavement. After backfill and compaction, the CONTRACTOR shall saw cut and remove a minimum of 12 inches AC beyond any irregular or damaged pavement on each side of the trench before installation of the trench pavement patch.
The CONTRACTOR shall clean all pavement surfaces by sweeping or other dry cleanup means to remove all loose particles of paving, all dirt, and all other extraneous material immediately before applying the prime coat.
1.5 AGGREGATE BASE
Aggregate base shall be provided where required and to the thickness indicated.
Imported aggregate bases shall be delivered to the job site as uniform mixtures, and each layer shall be spread in one operation. Segregation shall be avoided, and the base shall be free of pockets of coarse or fine material. Where the required thickness is 6 inches or less, the base materials may be spread and compacted in one layer. Where the required thickness is more than 6 inches, the base material shall be spread and compacted in two or more layers of approximately equal thickness, and the maximum compacted thickness of any one layer shall not exceed 6 inches. The relative compaction of each layer of aggregate base shall be not less than 95 percent of maximum density when measured in accordance with ASTM D 1557. The compacted surface of the finished aggregate shall be hard, uniform, smooth, and at any point shall not vary more than 0.02 foot from the specified grade or cross-section. In no case shall the aggregate base allow ponding or standing water.
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1.6 TACK COAT
A. A tack coat shall be applied to existing paved surfaces where new asphalt concrete is to be placed on or against existing pavement. It shall also be applied to the contact surfaces of all cold pavement joints, curbs, gutters, manholes, and the like immediately before the adjoining asphalt pavement is placed. Care shall be taken to prevent the application of tack coat material to surfaces that will not be in contact with the new asphalt concrete pavement. Diluted emulsified asphalt shall be applied at the rate of 0.10 to
0.20 gallon/square yard. Undiluted emulsified asphalt shall be applied at the rate of
0.05 to 0.15 gallon/square yard.
B. No traffic shall be allowed on the tack coat with the exception of vehicles unloading asphalt concrete. All vehicles involved with the CONTRACTOR's operations shall turn around within the roadway right-of-way. Driveways and other private property shall not be used without prior written consent of the involved owner, a dated copy of which must be delivered to the Engineer prior to the use thereof.
1.7 ASPHALT CONCRETE
A. The CONTRACTOR shall install all concrete, steel, piping, backfill, and bedding before placing asphalt concrete.
B. Asphalt concrete shall not be placed on any surface that contains ponded water or excessive moisture in the opinion of the Engineer.
C. At the time of compaction, the temperature of mixture shall not be lower than 250 degrees Fahrenheit or higher than 320 degrees Fahrenheit, the lower limit to be approached in warm weather and the higher in cold weather.
D. Asphalt concrete shall not be placed when the atmospheric temperature is below 50 degrees Fahrenheit or during unsuitable weather, including rain or fog. Should unsuitable weather conditions develop during paving operations and force a shut down, loaded trucks in transit shall return to the plant and no additional compensation will be allowed.
E. Asphalt concrete shall be placed in lifts no thicker than 2½-inches and no thinner than 1½-inches.
F. The asphalt concrete shall be evenly spread upon the subgrade or base to such a depth that, after rolling, it will be of the specified cross-section and grade of the coarse being constructed. All spreading and compacting shall be in conformance with Section 39 of the California State Standard Specifications. Loaders (pick-up machines) shall not be used.
G. The depositing, distributing, and spreading of the asphalt concrete shall be accomplished in a single, continuous operation by means of a self-propelled mechanical spreading and finishing machine designed specifically for that purpose. The machine shall be equipped with a screed or strike-off assembly capable of being accurately regulated and adjusted to distribute a layer of the material to a definite predetermined thickness. When paving is of a size or in a location that use of a self-propelled machine is impractical, the ENGINEER may waive the self-propelled requirement.
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H. Spreading, once commenced, shall continue without interruption.
I. The mix shall be compacted immediately after placing. Initial rolling with a steel-wheeled, tandem roller; steel-three-wheeled roller; vibratory roller; or a pneumatic-tired roller shall follow the paver as closely as possible. If needed, intermediate rolling with a pneumatic- tired roller shall be done immediately behind the initial rolling. Final rolling shall eliminate marks from previous rolling. In areas too small for the roller, a vibrating plate compactor or a hand tamper shall be used to achieve thorough compaction.
J. The relative density after compaction shall be 95 percent of the density obtained by using ASTM D1188 or D2726. A properly calibrated nuclear asphalt testing device shall be used for determining the field density of compacted asphalt concrete, or slabs or cores may be laboratory tested in accordance with ASTM D1188. A minimum of one compaction test per day shall be provided and an additional compaction test for each 500 square feet completed. If the test results for any lot of asphalt concrete indicate that the relative compaction is less than 95.0%, the asphalt concrete represented by that lot shall be removed and replaced at CONTRACTOR's expense. Asphalt concrete spreading operations shall not continue until the Contractor makes significant adjustments to the materials, procedures or both in order to meet the required compaction. The adjustments shall be as agreed to by the Engineer.
K. Upon completion, the pavement shall be true to grade and cross-section. When a 10 foot straightedge is laid on the finished surface parallel to the center of the roadway, the surface shall not vary from the edge of the straightedge more than 1/8 inch, except at intersections or changes of grade. In the transverse direction, the surface shall not vary from the edge of the straightedge more than 1/4 inch.
L. Upon completion, slope of street draining to the gutter shall match existing.
1.8 PROTECTION OF STRUCTURES
Provide whatever protective coverings may be necessary to protect the exposed portions of buildings, curbs, posts, guard fences, equipment pads, and any other structures from splashing oil and asphalt from the paving undesirable matter that may come upon these structures by reason of the paving operations.
1.9 CONTRACTOR'S RESPONSIBILITY
Settlement of replaced pavement over trenches within the warranty period shall be considered the result of improper or inadequate compaction of the subbase or base materials. The CONTRACTOR shall promptly repair all pavement deficiencies noted during the warranty period at the CONTRACTOR's sole expense.
1.10 TEMPORARY PAVING
A. The same day the trench is backfilled, it will be graded to conform to the existing surface and temporary pavement consisting of a minimum of 2 inches of premixed asphaltic paving material will be placed over the trench. Temporary pavement shall be maintained in a safe and drivable condition until permanent paving is placed.
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B. Temporary pavement shall be removed and permanent pavement shall be installed within the time period designated in Part 3.2 above unless otherwise specified by the CITY. The permanent pavement shall be maintained to the satisfaction of the ENGINEER for the full guarantee period.
END OF SECTION
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SECTION 9 CURBS, GUTTERS, SIDEWALKS, CURB RAMPS, VALLEY GUTTERS, AND
DRIVEWAYS
PART 22 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish all labor, materials, and equipment necessary to construct the curbs, gutters, sidewalks, curb ramps, valley gutters, and driveways, in accordance with the Contract Documents.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
Without limiting the generality of other requirements of the Contract Documents, all WORK specified herein shall conform to or exceed the requirements of the Building Code for San Mateo County and/or the City of San Carlos.
1.3 CONTRACTOR SUBMITTALS
A. Submit manufacturers literature for all machines specifically designed for such work (i.e., machines to construct asphaltic concrete curbs).
B. Submittals for asphaltic concrete shall be in accordance with Section 8, Asphaltic Concrete Paving.
C. Material submittals for concrete shall be in accordance with the requirements of Section 16, Cast-in-Place Concrete.
1.4 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
C. Concrete surface improvements shall conform to Section 73, Concrete Curbs and Sidewalks, of the State Standard Specifications.
PART 23 - PRODUCTS
1.1 MATERIALS
A. Concrete shall conform to the requirements of City Standard Detail 7, Concrete General Notes.
B. All concrete curb and gutter, sidewalk, driveway and driveway apron, and wheelchair ramp that interfere with the proposed construction shall be removed to an existing joint or joint sawed with a vertical face. Replacement of concrete curb and gutter, sidewalk, driveway and driveway apron, and wheelchair ramp shall match existing.
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C. Portland cement concrete is designated by class based on 28-day compressive strengths (when tested in accordance with ASTM C 39) as specified herein:
Class A Concrete shall contain approximately 564 pounds of portland cement per cubic yard and have a 28-day compressive strength of not less than 3000 psi.
Class D Concrete shall contain not less than 658 pounds of portland cement per cubic yard and have a 28-day compressive strength of not less than 3500 psi.
Class Intended Use
A General Construction -structures, curbs, gutters, sidewalks, , minor structures, thrust and anchor blocks.
D Concrete driveways, driveway conforms, driveway curb and gutters, emergency pavement, underwater placement, and seals.
If the class of concrete is not specified on the plans or in these specifications, or otherwise directed by the Engineer, it shall be Class A.
D. Asphaltic concrete is specified in Section 8, Asphaltic Concrete Paving.
PART 24 - EXECUTION
1.1 GENERAL
Curbs, gutters, sidewalks, curb ramps, valley gutters, and driveways shall be constructed by the conventional use of forms unless the ENGINEER has favorably reviewed the CONTRACTORs submittal proposing the use of a curb and gutter machine. Curb and gutter machines shall be specifically designed for such work, and the resulting products shall be equal to or better than would typically be obtained using forms. If the results are not satisfactory, then use of machines shall be discontinued.
1.2 SURFACE PREPARATION
Where any curb, gutter, sidewalk, curb ramp, valley gutter, or driveway has been removed, destroyed, or displaced, the same shall be replaced to the nearest score line or construction joint to the same dimensions and finish as the original construction that was removed. Features to be demolished shall be saw cut at the limiting construction joints and all curbs, gutters, sidewalks, curb ramps, valley gutters, or driveways shall be removed and disposed of by the CONTRACTOR.
The subgrade shall be constructed and compacted true to line and grade, as required.
All soft or unsuitable material shall be removed to a depth of not less than 6 inches below subgrade elevation and replaced with satisfactory material.
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1.3 FORMS
Forms conforming to the dimensions of the curb, gutter, sidewalk, curb ramp, valley gutter, or driveway shall be carefully set to line and grade and shall be securely staked in place. The forms and subgrade shall be watered immediately in advance of placing concrete. Forms shall be thoroughly cleaned each time they are used and shall be coated with light oil or another releasing agent of a type that will not discolor the concrete.
1.4 PLACEMENT
A. Concrete shall be thoroughly spaded away from the forms to eliminate rock pockets next to the forms. The concrete may be compacted by mechanical vibrators acceptable to the ENGINEER. Tamping or vibrating shall continue until the mortar flushes to the surface and the coarse aggregate is below the concrete surface.
B. Expansion joints shall be located to match the expansion joints in the removed curb, gutter, sidewalk, curb ramp, valley gutter, or driveway, unless otherwise indicated in the Contract Documents. Expansion joints shall be constructed vertical and at right angles to the centerline of the street. Joints shall be constructed at all radius points, driveways, alley entrances, and at adjoining structures.
C. Contraction joints shall be constructed not more than 10 feet apart. Joints shall be made by the use of steel dividers, scoring or saw cutting to a depth of not less than 1-1/2 inches and matching joints in adjacent sidewalks and/or driveways.
1.5 FINISH
Exposed surfaces of sidewalk, driveway, curb and gutter shall be teel troweled followed by a medium broom finish. The front-face form shall not be removed before the concrete has taken the initial set and has sufficient strength to carry its own weight. Gutter forms and rear forms shall not be removed until the concrete has hardened sufficiently to prevent damage to the edges. Any portion of the curb, gutter, sidewalk, or driveway that is damaged shall be repaired or replaced at no additional cost to the CITY.
1.6 TESTING AND TOLERANCES
All surfaces shall be tested by laying a 10 foot long straightedge along the surface. Any deviation from the lines and grades indicated in the Contract Documents of more than 1/4 inch in the 10 foot length shall be cause for rejection. Similarly, any section of the WORK that is deficient in depth shall be removed and replaced.
When required by the ENGINEER, gutters having a slope of 0.8 foot per 100 feet, or less, or gutters having unusual or special conditions that cast doubt on the capability of the gutter to drain, shall be water tested for proper drainage. Water testing shall consist of establishing flow in the length of gutter to be tested by supplying water from a hydrant, tank truck, or other source. One (1) hour after the water source is removed the gutter shall be visually inspected for evidence of ponding or improper shape. In the event water is found ponded in the gutter to a depth of 1/8 inch or greater, or on the adjacent asphalt pavement, all defects shall be corrected in a manner acceptable to the ENGINEER, at no additional cost to the CITY.
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END OF SECTION
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SECTION 10 TRAFFIC STRIPES AND PAVEMENT MARKINGS
PART 25 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall furnish all tools, materials, labor, and equipment required to furnish, install and restore, complete and in place, thermoplastic traffic stripes and pavement markings damaged during construction, all in accordance with the requirements of the Contract Documents.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. Work shall be in conformance with Sections 84 and 85 of the State Standard Specifications.
PART 26 - PRODUCTS
1.1 MATERIALS
A. Thermoplastic materials shall conform to the provisions in Sections 84-1, General, and 84-2.02, Thermoplastic Traffic Stripes and Pavement Markings Materials of the State Standard Specifications and these special provisions.
B. The thermoplastic material shall be PTH-02SPRAY.
C. Glass beads to be applied to the surface of the molten thermoplastic material shall conform to the requirements of State Specification 8010-004, or AASHTO Designation:
M 247 (Type 1). Copies of State Specifications are available at the State of California Transportation Laboratory, Sacramento, California.
D. At the option of the Contractor, STAMARK Brand Pavement Tape, Pliant Polymer Grade, manufactured by 3M Company; or Cata-Tile Elastoplastic Roadmarking Tile, manufactured by the Cataphote Division of the Ferro Corporation may be placed instead of the thermoplastic material specified herein. Pavement tape or roadmarking tile, if used, shall be installed in accordance with the manufacturers specifications. If pavement tape or road marking tile is placed instead of thermoplastic materials, the pavement tape or road marking tile will be measured and paid for as thermoplastic pavement marking.
E. Delineators (Fire Hydrant) Two-way reflective blue Stimsonite No. 88, or approved equal.
F. Pavement Markers Type A, D, G, and AY reflective pavement markers conforming to Section 85 of the State Specifications.
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G. Epoxy Rapid set epoxy adhesive conforming to Section 95 of the State Specifications.
PART 27 - EXECUTION
1.1 GENERAL
A. Application shall be in accordance with Section 84 of the State Specifications.
Thermoplastic and paint shall be placed as close as possible to utility structures without covering them.
B. All work necessary to establish satisfactory lines for markings shall be performed by the Contractor.
C. Installation of striping and markings shall be completed no sooner than 2 days and no later than 10 days after completion of pavement construction.
END OF SECTION
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SECTION 11 SANITARY SEWER LATERALS
PART 28 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall furnish all pipe, fittings, tools, materials, and labor required to install and test, complete and in place, the sanitary sewer laterals, all in accordance with the requirements of the Contract Documents.
B. The Contractor shall be responsible to locate all laterals and CCTV video inspect all active lower laterals (easement laterals do not require CCTV video inspection prior to replacement).
C. The City assumes no responsibility for the accuracy of the sewer maps provided or the inadvertent omission of information. Not all existing sewer laterals are guaranteed to be located and the Contractor may, therefore, encounter sanitary sewer laterals not specified on the Contract Drawings. The Contractor shall have the sole responsibility for locating all existing live laterals within the project limits.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
1. City Standard Detail No. 13, Standard Connection to Manhole Walls
2. City Standard Detail No. 16, Standard Sewer Lateral
3. City Standard Detail No. 17, Standard Sewer Lateral Cleanout
1.3 CONTRACTOR SUBMITTALS
A. The CONTRACTOR shall submit drawings to the ENGINEER clearly indicating which laterals have been identified as active and which have been identified as inactive, and showing the field-verified location of each lateral.
B. The CONTRACTOR shall provide manufacturers information describing the pipe material, manufactured wyes and fittings, cleanouts, utility boxes and lids, and any pipe connectors proposed.
C. The CONTRACTOR shall furnish certificates to the ENGINEER certifying that all pipe and fittings furnished hereunder are in compliance with the requirements of the Contract Documents.
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PART 29 - PRODUCTS
1.1 GENERAL
A. Laterals to be reconnected or replaced shall be of the same size as the existing lateral, unless otherwise approved in writing by the ENGINEER. Referenced pipe sizes are nominal pipe diameters. Typically, single-family dwellings have 4-inch diameter laterals.
All other dwellings have 5-inch or 6-inch diameter laterals.
B. Laterals shall be reconnected to the sewer main or manhole in approximately the same location.
C. All materials delivered to the job site shall be new, free from defects, and marked to identify manufacturer, material, class, and other appropriate information.
D. Acceptance of materials will be subject to strength and quality testing, in addition to inspection of the completed product. Acceptance of the installed piping system will be based on inspection and leakage tests.
1.2 PIPING MATERIALS
A. Connection of the sanitary sewer laterals to sewer pipelines installed using open-cut construction techniques shall be made at pre-manufactured wyes only. The wye shall be positioned such that the lateral connects near the crown of the sewer pipeline.
B. For sewer pipelines installed using trenchless techniques (pipe bursting), the lateral shall be connected to the sewer using an Inserta Wye, a three piece service connection consisting of a PVC hub, rubber sleeve, and stainless steel band compression fit into the cored wall of the sewer main. The core shall be positioned such that the lateral connects near the crown of the sewer pipeline.
C. Pipe used for laterals and risers shall be either polyvinyl chloride in accordance with Section 18, Polyvinyl-Chloride Pipe, or high-density polyethylene pipe, in accordance with Section 19, High-Density Polyethylene Pipe.
D. Banded rubber couplings for use in joining of new pipe to existing laterals shall be compression type couplings with external, adjustable Type 316 stainless steel shear rings, such as Band Seal®, manufactured by Mission Clay Products, Corp.; Ceramicweld, as manufactured by Joints, Inc.; or approved equal. Use of couplings without external shear support, or of couplings with shear rings in direct contact with the pipe at joints (internal of the rubber collar), will not be permitted except when joining dissimilar pipe materials.
PART 30 - EXECUTION
1.1 GENERAL
A. The CONTRACTOR shall reconnect all active laterals from the new main to a point a minimum of three (3) feet from the main, unless directed by the ENGINEER to replace
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the entire lower lateral. All connections to existing laterals shall be made at sound joints and sections of pipe.
B. Sanitary sewer laterals may be installed using open cut or pipebursting construction methods.
1. Excavation and trench backfilling shall be in accordance with the requirements of Section 4, Earthwork. At the CONTRACTORs option, and at no additional expense to the CITY, the CONTRACTOR may backfill the trench around the two- way cleanout with controlled low-strength material (CLSM), as specified in Section 5, Controlled Low-Strength Material; if CLSM is used to backfill the area around the cleanout, the CLSM shall extend to a level 12 inches above the crown of the lateral, but no less than three inches below the bottom of the utility box or extension (if applicable).
2. Pipebursting shall be in accordance with Section 6, Pipebursting.
C. The CONTRACTOR shall bypass wastewater from the lateral in accordance with the requirements of Section 4, Bypassing Wastewater or shall arrange with the property owner to temporarily shut down lateral service in order to connect the new and existing laterals. The CONTRACTOR shall exercise great care to ensure that no wastewater is allowed to spill from the lateral.
1.2 PIPE INSTALLATION
A. Connect the appropriately-sized lateral to the new main sewer near the crown of the pipe. Connection method and material shall be as indicated in Part 2.2 above and the Contract Drawings.
B. Lateral pipelines shall be laid with the bell portion of the pipe in an upstream orientation.
Only manufactured fittings shall be used to adjust grade, where required. The minimum slope for 4 inch laterals shall be 2 percent (1/4 inch per foot). For 6 inch sewers, the minimum slope shall be 1.1 percent. The maximum slope for any lateral shall be 150 percent.
C. Connect the new lateral to the existing lateral using a dual shear band rubber coupling with stainless steel shield and clamp bands.
1.3 LANDSCAPE RESTORATION
The CONTRACTOR shall restore the area affected by its operations in accordance with the requirements of Section 4, Earthwork.
1.4 TESTING
The laterals shall be tested as a part of the main sewer system in accordance with the requirements of Section 12, Sanitary Sewer System Testing. The CONTRACTOR shall install an inflatable plug through each cleanout or other appropriate location to isolate the new system from the existing system.
END OF SECTION
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SECTION 12 PRECAST CONCRETE MANHOLES
PART 31 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish and install all prefabricated manholes, complete with grade rings, frame, cover, pipe connections, preformed joint sealant, and any other necessary appurtenances, in accordance with the requirements of the Contract Documents.
Prefabricated manholes shall be installed on top of cast-in-place bases. Refer to Section 16, Cast-in-Place Concrete, for cast-in-place base requirements.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
1. City Standard Detail No. 11, Standard Manhole
2. City Standard Detail No. 13, Standard Connection to Manhole Walls
3. City Standard Detail No. 14, Standard Manhole Cover and Frame C. Commercial Standards:
ACI 318 Building Code Requirements for Reinforced Concrete ASTM A 48 Specification for Gray Iron Castings
ASTM C 150 Specification for Portland Cement
ASTM C 478 Specification for Precast Reinforced Concrete Manhole Sections
1.3 CONTRACTOR SUBMITTALS
Shop Drawings : The CONTRACTOR shall furnish complete shop drawings for all precast manhole sections, cast-iron frames and covers, and appurtenances for review by the ENGINEER.
1.4 QUALITY ASSURANCE
Inspection: After installation, the CONTRACTOR shall demonstrate that all manholes have been properly installed, level, with tight joints, at the correct elevations and orientations, and that the backfilling has been carried out in accordance with the Contract
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Documents. All manholes shall be tested in accordance with Section 12, Sanitary Sewer System Testing.
PART 32 - PRODUCTS
1.1 MATERIALS
A. Manholes: Manholes shall be constructed of precast concrete manhole rings and shall conform to ASTM C 478. Precast concrete rings shall be manufactured by a process that will produce a dense, homogeneous concrete ring of first quality. The rings shall be steel reinforced and have a minimum wall thickness of 4 inches. Cement used in manufacturing the rings shall be Type V, Portland cement, as specified in ASTM C 150.
Manhole sections, cones, and grade rings shall be joined using preformed joint sealant only. Use of mortar will not be allowed. All manholes shall have concrete bases and formed channels with inverts to match the adjoining pipes.
1. Manhole Manufacturers, or Approved Equal:
a. Associated Concrete Products, Livermore, California
b. Hanson Concrete Products, Inc., Milpitas, California c. Oldcastle Precast, Sacramento, California
B. Castings: Castings for manhole frames and covers shall be non-rocking and shall conform to the requirements of ASTM A 48, Class 30. Cast-iron covers and frames shall be heavy-traffic type with a minimum weight and diameter as required. Frame and cover shall be designed for minimum load as indicated in the Contract Drawings. All sanitary sewer covers shall be marked SEWER. Each item in a set of frames and covers shall be supplied by the same manufacturer. The manhole covers shall have a curved pick hole and side pry hole.
C. Concrete Sealant: Concrete sealant and waterproofing compound shall be applied to the outside of the manhole barrel prior to backfill. Sealant material shall be submitted to the ENGINEER for approval.
1.2 DESIGN LOADS
A. Vertical Loads: Design all precast manhole rings and accessories to support an AASHTO HS-20 truck loading, in addition to soil weight above sloping ring sections and the dead load of all material supported above.
B. Lateral Loads: Lateral loads shall be as dictated by the following formula or the geotechnical report requirements, whichever are more stringent.
Operating: 95 x H (psf) triangular equivalent fluid pressure for dead load plus a live load surcharge from an H-20 truck, including impact.
Seismic: 23 x H 2 (psf) uniform pressure distribution.
Where H = depth below finished grade.
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PART 33 - EXECUTION
1.1 WORKMANSHIP
A. Precast Concrete Manhole Sections: Precast concrete manhole sections shall be set so as to be vertical, with sections in true alignment. The joint of the previously set section shall be covered with sealing compound primer and joint sealant before the next section is placed.
B. Connections: Connections to manufactured, precast items shall be made by casting sections of pipe into the items, using non-shrink grout, and/or using an approved resilient connector.
C. All precast concrete manholes shall be installed in strict conformance with the manufacturers written instructions, on a well-compacted foundation, as specified in Section 4, Earthwork. After installation of concrete manholes, the CONTRACTOR shall apply concrete waterproofing sealant to the outside of manhole barrels. The CONTRACTOR shall allow sufficient time for sealant to cure, prior to backfill, in accordance with the manufacturers written instructions.
D. Existing and new manhole frames and covers shall not be set to final grade until the pavement has been completed, unless otherwise approved by the ENGINEER. Concrete manhole collars shall be installed as indicated. Paving around the manhole shall be in accordance with Section 8, Asphaltic Concrete Paving. Openings in manholes shall be protected from construction loads, debris, and unauthorized entry.
E. Connection to existing manholes: When a new sewer main is connected to an existing manhole, the manhole shall be modified to accept the new size of pipe and grouted to form a new flow channel in the manhole base. The wall of the manhole shall be breached by core drilling, sawing, or other approved method that does not disturb the manhole.
The Contractor shall seal the penetration with StopAQ or SealGuard II, or an approved equivalent water stop, and shall grout the sealed penetration with a rapid set, high strength, non-shrink cementitious mortar to protect the sealer. The Contractor shall backfill the exterior of the manhole around the pipe penetration with concrete to stabilize the connection. When any other modifications are required to a new or existing manhole, the Contractor shall use a bonding agent such as Sakrete Concrete Bonder and Fortifier, or an approved equivalent, to adhere modification material to the existing structure.
F. Testing: All manholes shall be tested in accordance with Section 12, Sanitary Sewer System Testing.
END OF SECTION
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SECTION 13 SANITARY SEWER SYSTEM TESTING
PART 34 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall perform all pipeline flushing and testing, complete, for sanitary sewerage system piping in accordance with the Contract Documents.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. Commercial Standards:
ANSI/ASTM C 828 Practice for Low-Pressure Air Test of Vitrified Clay Pipe Lines 100 to 300 mm (4 to 12-inch)
ASTM F1417 Practice for Installation Acceptance of Plastic Non-pressure Sewer Lines Using Low-Pressure Air
1.3 CONTRACTOR SUBMITTALS
A. A testing schedule shall be submitted in writing for approval a minimum of seventy-two (72) hours before testing is to start.
B. CONTRACTOR shall identify the equipment to be used for testing pipelines and manholes and describe all procedures.
C. CONTRACTOR shall submit all testing results, indicating whether the results represent a successful or unsuccessful test, within twenty-four (24) hours of each test.
PART 35 - PRODUCTS
1.1 MATERIALS REQUIREMENTS
Temporary valves, bulkheads, plugs, and other pressure-testing equipment materials shall be provided by the CONTRACTOR subject to the ENGINEER's review. No materials shall be used which would be injurious to the public, personnel, adjacent improvements, nor the pipeline structure and future function. Air test gauges shall be laboratory-calibrated test gauges and shall be recalibrated by a certified laboratory, at the CONTRACTOR's expense, prior to the leakage test.
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PART 36 - EXECUTION
1.1 GENERAL
A. All pipelines shall be cleaned by balling, flushing, and/or other approved methods prior to testing. Debris shall be removed from the downstream manhole until all pipelines are clean.
B. All testing operations shall be performed in the presence of the City.
1.2 TESTING OF PIPING
A. General: All gravity sewer pipes and service laterals shall be tested for exfiltration and/or infiltration and deflection, as specified. All manholes shall be tested for leakage, as specified. Manholes shall be tested prior to backfill placement, whereas all pipe shall be backfilled prior to testing. All leakage tests shall be completed and approved prior to placing of permanent resurfacing. When leakage or infiltration exceeds the amount allowed by the Contract Documents, the CONTRACTOR at its expense, shall locate the leaks, submit a repair procedure(s) for the Citys review, and make the necessary repairs or replacements in accordance with the Contract Documents to reduce the leakage or infiltration to the specified limits. Any individually detectable leaks shall be repaired, regardless of the results of the tests. Pipe joint leakage repair solely with cement grout will not be permitted. Pipe shall be repaired at Contractors expense and retested until requirements are met.
B. Leakage Tests: Sanitary sewer systems shall be subjected to an air pressure test. The CONTRACTOR shall furnish all materials, equipment and labor for making an air test.
Air test equipment shall be approved by the City.
Each section of sewer main and service lateral shall be tested between successive manholes by plugging and bracing all openings in the sewer lines. Air shall be slowly added until the internal pressure is raised to 4.0 pounds per square inch gage (psig).
The compressor used to add air to the pipe shall have a blowoff valve set at 5 psig to ensure that at no time the internal pressure in the pipe exceeds 5 psig. The internal pressure of 4 psig shall be maintained for at least two minutes to allow the air temperature to stabilize, after which the air supply shall be disconnected and the pressure allowed to decrease to 3.5 psig.
The time in minutes that is required for the internal air pressure to drop from 3.5 psig to
2.5 psig shall be measured. The results shall not be less than the minimum permissible duration for air test pressure drop shown in the following table:
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ACCEPTANCE TESTING FOR SANITARY SEWERS
LOW PRESSURE AIR TEST
TIME ALLOWED FOR PRESSURE LOSS FROM 3.5 PSIG TO 2.5 PSIG C. Deflection Test : All flexible and semi-rigid pipe shall be tested for deflection, joint displacement, or other obstruction by passing a rigid mandrel through the pipe by hand, not less than 30 days after completion of the trench backfill, but prior to permanent resurfacing. The mandrel shall be a full circle, solid cylinder, or a rigid, non-adjustable, odd-numbered leg (9 leg minimum), steel cylinder, approved by the City as to design and manufacture. The circular cross-section of the mandrel shall have a diameter of at least 95 percent of the specified average inside pipe diameter of the pipe, and the minimum length of the circular portion of the mandrel shall be equal to the nominal diameter of the pipe. Obstructions and excessive deflection encountered by the mandrel shall be corrected by the CONTRACTOR at no additional expense to the CITY.
D. Television Inspection: After cleaning the sewers, the CONTRACTOR shall perform a television inspection of the sanitary sewer mains upon substantial completion of the WORK. Defects discovered by the video inspection shall be corrected and reinspected at the CONTRACTOR's cost. The pipeline shall then be inspected a second time to confirm satisfactory correction of all defects previously identified. The second and any subsequent inspections, if necessary, shall be performed by a contractor approved by the CITY and at the CONTRACTORs cost.
1.3 TESTING OF MANHOLES
A. All sewer manholes shall be vacuum tested for leakage in accordance with ASTM C1244 after installation, but prior to being backfilled. Prior to vacuum testing, all manhole risers shall be visually inspected for leaks. All leaks or cracks shall be repaired by the CONTRACTOR, prior to testing, to the satisfaction of the City.
B. Plug influent and effluent lines, including service lines, with suitably sized pneumatic or mechanical plugs. Ensure plugs are properly rated for pressures required for test. Follow manufacturers safety and installation recommendations. Place plugs minimum of 6 inches outside of structure walls. Brace inverts to prevent lines from being dislodged when lines entering structure have not been backfilled.
C. Vacuum testing:
1. Install vacuum tester head assembly at top access point of structure and adjust for proper seal on straight top section of structure. Following manufacturer's
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instructions and safety precautions, inflate sealing element to recommended maximum inflation pressure; do not over-inflate.
2. Evacuate structure with vacuum pump to 10 inches mercury (Hg), disconnect pump, and monitor vacuum for time period specified in the following table:
MINIMUM VACUUM TESTING TIMES FOR SANITARY MANHOLES
TIME IN SECONDS BY
MANHOLE DIAMETER
MANHOLE
DEPTH IN
FEET 48 60 72
4 10 13 16
8 20 26 32
12 30 39 48
16 40 52 64
20 50 65 80
24 60 78 96
3. If drop in vacuum exceeds 1 inch Hg over specified time period tabulated in above table, locate leaks, complete repairs necessary to seal structure and repeat test procedure until satisfactory results are obtained.
END OF SECTION
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SECTION 14 SEWER CLEANING
PART 37 - GENERAL
1.1 DESCRIPTION
A. SCOPE
This section specifies the requirements for cleaning of sewer pipes prior to CCTV and after rehabilitation. The pipe is very fragile and in poor condition. The Contractor shall take extra care for cleaning and CCTV inspection.
B. REQUIREMENTS
The Contractor shall clean the sewers specified for CCTV inspection and replacement.
All materials dislodged during cleaning shall be removed from the sewer and disposed of by the Contractor. Sewer cleaning methods shall include water jetting and foam pigging.
CCTV inspection is not required during cleaning operations. However, the Contractor shall at Contractors expense, inspect the sewer to view current line conditions prior to rehabilitation.
1.2 MAJOR BLOCKAGE
A. A major blockage shall be defined as an obstruction within the sewer which cannot be removed by cleaning with commercially available hydraulic or mechanical cleaning equipment.
1.3 SUBMITTALS
A. Submit written description of cleaning procedure and all equipment to be used.
PART 38 - PRODUCTS
1.1 EQUIPMENT
A. GENERAL
All equipment specified in this section shall be in good working condition and manufactured or fabricated to withstand the severity of the work covered under this section.
B. HYDRAULIC AND MECHANICAL CLEANING
All hydraulic cleaning equipment shall be truck mounted. Water jet cleaning equipment shall include a water tank, auxiliary engine, pumps, and hydraulically driven hose reel.
The Contractor shall provide a minimum of 600 feet of high-pressure hose and a
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selection of high velocity nozzles, each having a capacity of 50 gallons per minute at working pressures of 1,000 to maximum 1,500 pounds per square inch. Pressure to the nozzle shall be regulated by a relief valve adjustable from 1 to 1,500 psi. Nozzles shall be capable of producing a jet stream angle of 15 to 45 degrees from the horizontal. The Contractor shall also provide a high velocity gun with sufficient discharge and pressure to thoroughly clean manhole interiors.
C. ROOT REMOVAL
The Contractor shall be responsible for removal of roots within the sanitary sewer pipelines as part of the cleaning of the pipeline and no additional compensation will be allowed therefor. Roots shall be removed where revealed by the video inspection.
Special attention shall be used during the cleaning operation to assure a removal of roots from the joints. Procedures may include, but not limited to, the use of mechanical equipment such as rodding machines and bucket machines using root cutters and porcupines, and equipment such as high velocity jet cleaners. Care shall be taken not to damage the existing pipe.
D. DEBRIS REMOVAL
The Contractor shall provide suitable equipment to catch and remove all debris dislodged during cleaning operations from the nearest downstream manhole. Equipment or methods which require a member or members of the CONTRACTORs crew, to physically excavate debris from within the manhole is prohibited. All debris shall be promptly removed from the sewer from the nearest manhole and shall be disposed of off- site in a lawful manner at a City-approved location. Hauling containers shall be watertight.
PART 39 - EXECUTION
1.1 GENERAL
The Contractor shall at all times conduct the work so as to prevent any blockage and minimize surcharging in the sewer manholes and connecting sewer pipelines. Damage to existing facilities as a result of the CONTRACTOR's work shall be promptly repaired in kind at the CONTRACTOR's expense. Prior to cleaning operations, the Contractor shall remove gripper plugs at cleanouts along the main pipeline being cleaned.
1.2 CLEANING
Cleaning shall remove all sludge, rocks, debris, roots, grease accumulations and obstructions from the sewer. Sewer cleaning methods may include water jetting, rodding, or bucketing. Unless otherwise directed by the Construction Manager, the Contractor shall select the most effective of these cleaning methods according to the prevailing site condition. Where bucketing is warranted, bucket machines shall be used to remove the major portion of debris. Bucket operations shall proceed in the upstream direction in one sewer reach at a time. The operation shall continue until the buckets can pass the entire reach with minimum collection of debris. Upon completion, the line shall be hydraulically cleaned.
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During cleaning operations, the Contractor shall provide a means of catching and removing the dislodged debris conveyed with the sewer flow, to the nearest downstream manhole. The method chosen shall not allow the transport of debris to downstream sewer reaches. All debris shall be disposed of at the end of each day.
END OF SECTION
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SECTION 15 CCTV INSPECTION OF EXISTING AND REHABILITATED SEWERS PART 40 - GENERAL
1.1 DESCRIPTION
A. SCOPE
The Contractor shall perform Closed Circuit Television (CCTV) inspections of the pipelines and record any defect discovered. The Contractor shall perform CCTV inspections of all active lower laterals located between City clean-out and sewer main prior to replacement, and submit the videos for review by the Engineer.
The Contractor will also perform CCTV inspections of all laterals located between City clean-out and sewer main after replacement to verify compliance with the Contract Documents.
The City has performed CCTV inspection of sewer main pipelines included in the project.
The inspections are available at the Public Works Department and are for information purposes only. The Contractor shall review the CCTV inspection videos and field verify.
B. REQUIREMENTS
The Contractor shall inspect the sewer interior using a color CCTV and document the inspection on a digital recorder. All inspection video shall be submitted in MPEG file format (.mpg) and saved on DVDs for submittal. DVD submittals on proprietary software are not permitted. Each inspected sewer reach, manhole to manhole, should have an associated MPEG file. Electronic PDF (.pdf) files of each inspection log and digital photographs (.jpg) files shall accompany the video inspections for each sewer reach (manhole to manhole) inspected.
The purpose of the pre-rehabilitation inspections shall be to verify condition of the existing sewers, assess cleaning needs, locate and log defects such as obstacles and breaks and to provide a permanent record of the existing sewer and lateral condition as it relates to line dimensions, material, changes and connections.
The purpose of the post-rehabilitation inspections will be to verify condition of the lining of the sewer and to provide a permanent record of the rehabilitated sewer and lateral connection (if any) conditions.
1.2 QUALITY ASSURANCE
A. CONTRACTORs Qualifications: The Contractor shall have a minimum of three (3) years of experience in such work necessary to successfully meet this specification and provide references for five (5) sewer inspection projects involving remote CCTV pan and tilt inspection.
B. The Contractor shall have all operators who are responsible for locating and logging defects into the data collection software successfully trained and certified through
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National Association of Sewer Service Companies (NASSCO) Pipeline Assessment and Certification Program (PACP).
1.3 SUBMITTALS
A. List of at least five (5) similar pipeline projects within the past five (5) years that required remote pan and tilt inspection. The reference projects shall contain a minimum total of 10,000 linear feet of CCTV pan and tilt.
B. Resume(s) and project references for the field personnel who will be employed for this project, including the NASSCO PACP Certification number for each operator.
C. Example of previous work for approval. The example shall consist of one DVD of previous sewer inspection work complete with audio commentary and inspection log(s).
The submitted example shall be the work of the field supervisor or foreman to be used on this project. Contractor shall be responsible for modifications to equipment and/or inspection procedures to achieve report material of acceptable quality.
D. Manufacturer's product literature for all video equipment including but not limited to cabling, camera, monitor, footage counter, video titling device, and recorder.
E. Written plan for verification of active laterals.
PART 41 - PRODUCTS
1.1 SEWER MAIN CCTV CAMERA
A. The camera(s) shall be operative in 100 percent humidity/submerged conditions. The CCTV camera equipment shall provide a view of the pipe ahead of the equipment and of features to the side and rear of the equipment through turning and rotation of the lens.
The camera shall be capable of tilting at right angles along the axis of the pipe while panning the camera lens through a full circle about the circumference of the pipe. The lights on the camera shall also be capable of panning 90-degrees to the axis of the pipe.
If the equipment proves to be unsatisfactory, it shall be replaced with adequate equipment. The camera unit shall have sufficient quantities of line and video cable to inspect sewers with access as far apart as 450 feet.
The CCTV camera, electronic systems and monitor shall provide an image that meets the following specifications:
1. The gray scale shall show equal changes in brightness ranging from black to white with a minimum of five stages.
2. With the monitor control correctly adjusted, the six colors - Yellow, Cyan, Green, Magenta, Red, and Blue, plus Black and White, shall be clearly resolved with the primary colors in order of decreasing luminance. The gray scale shall appear in contrasting shades of gray with no color tint.
3. The picture shall show no convergence or divergence over the whole of the picture.
The monitor shall be at least 13 inches diagonally across the picture tube.
4. The live picture on the CCTV monitor shall be capable of registering a minimum of 500 lines horizontal resolution and be a clear, stable image with no interference.
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B. Lighting intensity shall be remote controlled and shall be adjusted to minimize reflective glare. Lighting and camera quality shall provide a clear, in-focus picture of the entire inside periphery of the sewers and laterals for all conditions except submergence. Under ideal conditions (no fog in the sewer) the camera lighting shall allow a clear picture up to five pipe diameter lengths away for the entire periphery of the sewer. The lighting shall provide uniform light free from shadows or hot spots.
C. Camera focal distance shall be remotely adjustable through a range of 6 inches to infinity.
D. The monitor and software shall also be able to capture and save screen images of typical sewer details and all defects. Screen image files shall be named using upstream manhole number and footage and submitted on DVD following paragraph 3.8 of this section.
1.2 VIDEO RECORDINGS
A. The video and audio recordings of the sewer inspections shall be made using digital video equipment. The digital recording equipment shall capture sewer inspection on DVD with each sewer reach inspection recorded as an individual movie file (.mpeg, .mpg).
The files shall be named according to Upstream/Downstream manhole numbers or per requirements established elsewhere in the Specifications.
B. The audio portion of the composite video shall be sufficiently free from electrical interference and background noise to provide complete intelligibility of the oral report.
Audio shall be recorded by the operating technician on the inspection video as the sewer is inspected and shall include the sewer location, identification of beginning and terminating manholes including location (address or cross streets), inspection direction, length of inspection, side sewer identification, flow information, complete descriptions of the sewer line conditions as they are encountered, description of the rehabilitation work, reason for termination, and other relevant commentary to the inspections. In addition, the audio reports shall include the distance traveled on the specific run, a description of abnormal conditions in the sewer and side sewer connections as they are encountered, explanations for pausing, backing up, or stopping the survey, and the final measured center to center distances between consecutive manholes. Audio dubbing after the inspection is prohibited.
C. The reaches shall be inspected from upstream to downstream, wherever possible. The images recorded on the CCTV video shall be the same images that are required to be displayed on the CCTV monitor. The footage counter shall be zeroed at the beginning of each inspection and at each intermediate manhole along the inspection run. The video recorder shall be paused if the camera progress is stopped for a period longer than 30 seconds due to breakdown of the equipment, or any purpose other than analyzing conditions of the sewer. The operator shall document the delay on the recording when progress resumes.
D. The equipment used for the inspection must provide for simultaneous monitoring of the in-sewer inspection by the Construction Manager or City. Equipment that does not allow for out of sewer observation of the inspection will not be allowed.
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E. Typed labels shall be attached to the face of each CD or DVD. The typed index labels shall include the following information:
1. Content (CCTV)
2. Contractor name
3. Type of survey (CCTV)
4. Interceptor name
5. Reaches included (from Manhole Number ## to Manhole Number ##)
6. Date of survey
7. Work order number (if applicable)
8. Sheet number in plans
F. The inspection video shall be delivered on a medium that is not re-recordable. Contractor shall maintain a copy of all inspection documentation (DVDs, databases, and logs) for the duration of the work and warranty period.
1.3 PRODUCT DATA
A. The Contractor shall provide the following information in accordance with Section General Provisions, GP- 4.19; Submittals:
1. TV inspection reports as specified in paragraph 3.7 of this section shall be submitted each week covering the previous week's work.
PART 42 - EXECUTION
1.1 GENERAL
A. The CCTV camera shall be positioned as close to the spring line as possible while maintaining the required equipment stability. If the flow levels are above the spring line, then the vertical position of the camera shall be just above the free water surface. The Contractor shall identify and record wrinkles, folds, drips, and other defects found during the CCTV inspection. The Contractor shall inspect and document all manholes encountered during the inspection activities. The camera shall pan the periphery of the manhole from casting to invert. Inspections shall be conducted during low flow periods to increase the viewable sidewall area of the pipe.
B. The speed that the camera or survey unit is conveyed through the sewer while performing general inspections shall be uniform and shall be limited to a maximum of 30-feet per minute. The survey unit shall be slowed, stopped, or backed-up to perform detailed inspections of significant features. The camera shall be stopped at all defects, changes in material, water level, size, side connections, manholes, junctions, or other unusual areas. When stopped at the defect or feature, the operator shall pan the camera to the area and along the circumference of the pipe. The operator shall also record audio of the type of defect or feature, clock position, footage, extent or other pertinent data. Still photographs or screen captures shall be taken at all defects and general line condition photographs should be taken at least every 50 feet.
C. During period of camera advancement along the reach, the operator should pan to view the flow line conditions along both sides of the pipe and the crown at regular intervals.
This may be done while the camera is moving forward as long as the recorded
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picture quality is not adversely affected. When viewing the flow line area, the camera should be returned to the forward position providing a full view of the pipe before panning to view the opposite side of the sewer or the crown conditions.
D. At the Contractor's discretion or direction of the Construction Manager, the camera shall be stopped or backed up (when conditions allow) to view and analyze conditions that appear to be unusual or uncommon for a sound sewer. The lens and lighting shall be readjusted, if need be, in order to ensure a clear, distinct, and properly lighted feature.
The video recorder shall be paused if the camera progress is stopped for a period longer than 30 seconds due to breakdown of the equipment, or any purpose other than analyzing conditions of the sewer. The operator shall document the delay on the recording when progress resumes.
E. The Contractor shall be responsible for all traffic control measures required.
1.2 LINEAR MEASUREMENT
A. The Contractor shall measure the camera progress along the full length of each reach.
The length counter shall be zeroed at the beginning of each inspection, and at any intermediate manhole. In the case of resuming an inspection at an intermediate point along the pipeline, the length counter shall start at the last point recorded. The Contractor shall ensure that the counter starts to register immediately when camera progress starts.
The device shall be observable at ground level. Markings on the cable, instruments requiring observation inside a manhole, or correction of the length for the depth of the manhole are not acceptable.
B. Prior to commencing inspections, the Contractor shall demonstrate compliance with the linear measurement tolerance specified below:
1. The equipment shall measure the location of the camera unit in 1-foot increments from the beginning (upstream end) of each continuous section. This footage location must be displayed on the CCTV monitor and recorded.
2. The accuracy of the measured location shall be within + 0.5% of the actual length of the sewer reaches being surveyed, or 1 foot, whichever is greater.
1.3 CCTV MONITOR DISPLAY
A. The images displayed on the CCTV monitors shall be a view of the pipe above the water surface as seen by the CCTV camera as the unit is conveyed through the sewer.
B. The camera lighting shall be fixed in intensity prior to commencing the survey and the white balance set to the color temperature emitted. In order to ensure color constancy, ideally no variation in illumination shall take place during the survey.
1.4 DATA DISPLAYS
A. The CCTV images shall include an initial data display that identifies the sewer reach being surveyed and a survey status display that provides continuously updated information on the location of the survey unit as the survey is being performed. These data displays shall be in alphanumeric form. The size and position of the data shall not interfere with the main subject of the monitor picture.
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B. The on-screen display should be white during inspections where the background behind the display is dark and, conversely, black where the background is light.
C. At the beginning of each reach of sewer being inspected, the following information shall be electronically generated and displayed on the CCTV monitors as well as included in the audio track:
1. Date of survey
2. Interceptor name/location
3. Manhole number to manhole number (in order of inspection)
4. Direction of survey (upstream or downstream)
5. Time of start of survey.
D. During inspections, the following information shall be electronically generated, automatically updated, and displayed on the CCTV monitors:
1. Survey unit location in the sewer line in feet and tenths of feet from adjusted zero.
2. Sewer diameter
3. Abbreviated manhole reference numbers (upstream and downstream manholes in order of survey direction).
1.5 MANHOLE NUMBERING, INSPECTION FORMS AND DEFECT CODES A. The Contractor shall use the Citys manhole numbering system when performing the inspections for this project. The entire manhole number must be used when referring to an upstream/downstream manhole for a pipe reach. Defect codes shall conform to those specified in the NASSCO PACP specification.
1.6 PRE-CLEANING INSPECTIONS
A. If the camera cannot pass the entire sewer reach from its starting direction, the reach shall be inspected as much as possible from both upstream and downstream directions.
If the pipe cannot be fully inspected from either the upstream and downstream manholes the Contractor shall notify the Construction Manager. Such notification shall be written and include manhole to manhole reach numbers and the reason why inspection cannot be completed.
B. If any Contractor equipment becomes stuck in the sewer, the Contractor shall be responsible for all costs associated with extracting the equipment from the sewer.
C. Any damages to public or private property resulting from Contractor activities shall be repaired by the Contractor at no cost to the City.
D. City shall be present and observe pre-construction CCTV inspection.
1.7 REPORT
A. Two copies of the pre-rehabilitation and post-installation (4 copies total) inspection videos in sequential order from upstream manhole to downstream manhole saved in mpeg format on DVDs; electronic version (.jpg) of still photographs saved on DVDs; a digital Microsoft Access database conforming to the NASSCO PACP database standard
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populated with all inspection and defect information; and hard copies and electronic pdf files of the inspection logs shall be submitted to the Construction Manager for review and approval. DVDs or sections thereof that do not conform to the specifications shall be re- recorded in the field at the Contractor's expense. Original DVDs and re-recorded runs shall be edited to provide a record with all inspections in sequential order from upstream to downstream. DVDs not in sequential order are unacceptable.
B. The TV inspection report shall include video recordings, pictures and any City required inspection forms and defect codes. Contractor shall provide equal documentation on both the videos and forms. Contractor shall maintain a copy of all report material. The Contractor shall provide comments as necessary to fully describe the existing condition of the sewer, both through the voice over on the videos and on the inspection forms.
Photographs shall further document both typical sewer features, and defects. The photographs shall be copied to a DVD and submitted to the Construction Manager along with the videos and logs.
1.8 DVDs
A. TV inspections shall be recorded in DVD format.
B. Each recording shall continuously display the following:
1. Name of the sewer or storm drain.
2. City project number.
3. Manhole number (on construction drawings) from which the camera is traveling.
4. Manhole number to which the camera is traveling.
5. Distance measurements (within 1 percent accuracy)
6. Date of recording and inspector.
7. Pipe diameter.
8. Pipe material.
C. DVD recordings shall include an audio track recorded by the inspection technician during the actual inspection work describing the parameters of the line being inspected (i.e., location, depth, diameter, pipe type), as well as describing connections, defects and unusual conditions observed during inspection.
D. DVDs shall be professionally labeled showing the project name, the lines recorded on the tape, date, and name of Contractor/Inspector.
END OF SECTION
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SECTION 16 REINFORCEMENT STEEL
PART 43 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish, fabricate, and place all concrete-reinforcement steel, welded wire fabric, couplers, and concrete inserts for use in reinforced concrete and shall perform all appurtenant WORK, including all wires, clips, supports, chairs, spacers, and other accessories, all in accordance with the Contract Documents.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall be performed in accordance with codes as referenced herein.
B. Commercial Standards:
ACI 315 Details and Detailing of Concrete Reinforcement ACI 318 Building Code Requirements for Reinforced Concrete ASTM A 615 Specification for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement.
CRSI MSP-1 Concrete Reinforcing Steel Institute Manual of Standard Practice
1.3 CONTRACTOR SUBMITTALS
A. The CONTRACTOR shall furnish shop-bending diagrams and reinforcing bar lists, placing lists, and drawings of all reinforcement steel prior to fabrication.
B. Where mechanical couplers are required or permitted to be used to splice reinforcement steel, the CONTRACTOR shall submit manufacturers literature that contains instructions and recommendations for installation for each type of coupler used; certified test reports that verify the load capacity of each type and size of coupler used; and shop drawings that show the location of each coupler with details of how they are to be installed in the form work.
1.4 QUALITY ASSURANCE
A. If requested by the ENGINEER, the CONTRACTOR shall provide samples from each heat of reinforcement steel delivered in a quantity adequate for testing. Costs of initial tests will be paid by the CITY. Costs of additional tests due to material failing initial tests shall be paid by the CONTRACTOR.
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PART 44 - PRODUCTS
1.1 REINFORCEMENT STEEL
A. Reinforcement Steel for all cast-in-place, reinforced-concrete construction shall conform to the following requirements:
1. Bar reinforcement shall conform to the requirements of ASTM A 615 for Grade 60 Billet Steel Reinforcement with supplementary requirement S-1, or as otherwise shown.
B. Accessories:
1. Accessories shall include all necessary chairs, slab bolsters, concrete blocks, tie wires, dips, supports, spacers, and other devices to position reinforcement during concrete placement. All bar supports shall meet the requirements of the CRSI Manual of Standard Practice
2. Concrete blocks (dobies), used to support and position reinforcement steel, shall have the same or higher compressive strength as specified for the concrete in which it is located. Wire ties shall be embedded in concrete block bar supports.
1.2 MECHANICAL COUPLERS
A. At CONTRACTORs option, mechanical couplers may be used in lieu of lap splices or dowels. Submit mechanical coupler data sheet and layout for approval by the ENGINEER. The couplers shall develop a tensile strength that exceeds 125 percent of (125%) the yield strength of the reinforcement bars being spliced at each splice.
B. Where the type of coupler used is composed of more than one (1) component, all components required for a complete splice shall be supplied. This shall apply to all mechanical splices, including those splices intended for future connections.
C. The reinforcement-steel coupler used shall be compatible for obtaining the required strength of the connection. Straight threaded-type couplers shall require the use of the next larger size reinforcing bar or shall be used with reinforcing bars with specially forged ends that provide upset threads that do not decrease the basic cross-section of the bar.
D. Couplers shall be Lenton Form Saver as manufactured by Erico Products; Dowel Bar Splicer System as manufactured by Richmond Screw Anchor Company , or approved equal.
1.3 WELDED SPLICES
A. Welded splices shall not be used.
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PART 45 - EXECUTION
1.1 GENERAL
All reinforcement-steel, couplers, and other appurtenances shall be fabricated and placed in accordance with the requirements of the Building Code and the supplementary requirements specified herein.
1.2 FABRICATION
A. General:
1. Reinforcement steel shall be accurately formed, and the fabricating details shall be prepared in accordance with ACI 315 and ACI 318, unless otherwise indicated in the Contract Documents. Stirrups and tie bars shall be bent around a pin having a diameter not less than 1-1/2 inches for No. 3 bars, 2 inches for No. 4 bars, and 2-1/2 inches for No. 5 bars. Bends for other bars shall be made around a pin having a diameter not less than six (6) times the bar diameter, except for bars larger than 1 inch, in which case the bends shall be made around a pin of eight (8) bar diameters. Bars shall be bent cold.
2. The CONTRACTOR shall fabricate reinforcement bars for structures in accordance with bending diagrams, placing lists, and placing drawings. Said drawings, diagrams, and lists shall be prepared by the CONTRACTOR.
B. Fabricating Tolerances: Bars used for concrete reinforcement shall meet the following requirements for fabricating tolerances:
1. Sheared length: ±1 inch
2. Depth of truss bars: +0, -1/2 inch
3. Stirrups, ties, and spirals: ±1/2 inch
4. All other bends: ±1 inch
1.3 PLACING
A. Reinforcement steel shall be accurately positioned and shall be supported and wired together to prevent displacement, using annealed-iron, wire ties or suitable clips at intersections. All reinforcement steel shall be supported by concrete, plastic supports or spacers, or metal hangers that are strong and rigid enough to prevent any displacement of the reinforcement steel. Where concrete is to be placed on the ground, supporting concrete blocks (or dobies) shall be used, in sufficient numbers to support the bars without settlement, but in no case shall such support be continuous. All concrete blocks used to support reinforcement steel shall be tied to the steel with wire ties that are embedded in the blocks. For concrete over form work, the CONTRACTOR shall furnish concrete, plastic, or other acceptable bar chairs and spacers.
B. Limitations on the use of bar support materials shall be as follows:
1. Concrete dobies are permitted at all locations, except where architectural finish is required.
2. Plastic bar supports are permitted at all locations, except on grade.
C. Tie wires shall be bent away from the forms in order to provide the specified concrete coverage.
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D. Bars additional to those shown that may be found necessary or desirable by the CONTRACTOR for the purpose of securing reinforcement in position shall be provided by the CONTRACTOR at its own expense.
E. Unless otherwise specified, reinforcement placing tolerances shall be within the limits specified in Section 7.5 of ACI 318, except where in conflict with the requirements of the Building Code.
F. Bars may be moved as necessary to avoid interference with other reinforcement steel, conduits, or embedded items. If bars are moved more than one (1) bar diameter or enough to exceed the specified tolerances, the resulting arrangement of bars shall be as acceptable to the ENGINEER.
G. Accessories supporting reinforcing bars shall be spaced such that there is no deflection of the accessory from the weight of the supported bars. When used to space the reinforcing bars from wall forms, the forms and bars shall be located so that there is no deflection of the accessory when the forms are tightened into position.
1.4 SPACING OF BARS
A. The clear distance between parallel bars shall be not less than the nominal diameter of the bars, not less than 1 times the maximum size of the coarse aggregate, nor less than 1 inch.
B. The clear distance between bars shall also apply to the distance between a contact splice and adjacent splices or bars.
1.5 SPLICING
A. General: Reinforcement bar splices shall only be used at locations shown. When it is necessary to splice reinforcement at points other than where shown, the character of the splice shall be as acceptable to the ENGINEER.
B. Splices of Reinforcement:
1. The length of lap for reinforcement bars, unless otherwise shown, shall be in accordance with ACI 318.
C. Bending or Straightening : Reinforcement shall not be straightened or rebent in a manner that will injure the material. Bars with kinks or bends not shown shall not be used. All bars shall be bent cold, unless otherwise permitted by the ENGINEER. No bars partially embedded in concrete shall be field-bent, except as shown or specifically permitted by the ENGINEER.
D. Couplers that are located at a joint face shall be a type that can be set either flush or recessed from the face. The couplers shall be sealed during concrete placement to completely eliminate concrete or cement paste from entering. Couplers intended for future connections shall be recessed a minimum of 1/2 inch from the concrete surface.
After the concrete is placed, the coupler shall be plugged with plastic plugs that have an O-ring seal and the recess filled with sealant to prevent any contact with water or other corrosive materials. Threaded couplers shall be plugged.
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E. Unless noted otherwise, mechanical coupler spacing and capacity shall match the spacing and capacity of the reinforcing shown for the adjacent section.
1.6 CLEANING AND PROTECTION
A. Reinforcement steel shall at all times be protected from conditions conducive to corrosion until concrete is placed around it.
B. The surfaces of all reinforcement steel and other metal work to be in contact with concrete shall be thoroughly cleaned of all dirt, grease, loose scale, rust, grout, mortar, and other foreign substances immediately before the concrete is placed. Where there is delay in depositing concrete, reinforcement shall be reinspected and, if necessary, recleaned.
1.7 EMBEDMENT OF DRILLED, REINFORCING-STEEL DOWELS
A. Hole Preparation:
1. The hole diameter shall be as recommended by the epoxy manufacturer but shall be no larger than 1/4 inch greater than the diameter of the outer surface of the reinforcing bar deformations.
2. The depth of the hole shall be as recommended by the epoxy manufacturer to fully develop the bar but shall not be less than twelve (12) bar diameters, unless noted otherwise.
3. The hole shall be drilled by methods that do not interfere with the proper bonding of epoxy.
4. Existing reinforcing steel in the vicinity of proposed holes shall be located prior to drilling. The location of holes to be drilled shall be adjusted to avoid drilling through or nicking any existing reinforcing bars.
5. The hole shall be blown clean with clean, dry compressed air to remove all dust and loose particles.
B. Epoxy shall be injected into the hole through a tube placed to the bottom of the hole. The tube shall be withdrawn as epoxy is placed but kept immersed to prevent formation of air pockets. The hole shall be filled to a depth that ensures that excess material will be expelled from the hole during dowel placement.
C. Dowels shall be twisted during insertion into the partially filled hole so as to guarantee full wetting of the bar surface with epoxy. The bar shall be inserted slowly enough to avoid developing air pockets.
END OF SECTION
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SECTION 17 CAST-IN-PLACE CONCRETE
PART 46 - GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall furnish all materials for concrete in accordance with the provisions of this Section and shall form, mix, place, cure, repair, finish, and do all other work as required to produce finished concrete, all in accordance with the requirements of the Contract Documents.
B. Concrete items used on this Project include manhole bases and collars. All new manholes shall have cast-in-place concrete bases and formed channels with inverts to match the adjoining pipes.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall be performed in accordance with all codes as referenced herein.
B. Commercial Standards: Without limiting the generality of other requirements of these Specifications, all WORK specified herein shall conform to or exceed the applicable requirements of the referenced standards provided that wherever the provisions of said publications are in conflict with the requirements specified herein, the more stringent requirement shall apply.
ACI 214 Recommended Practice for Evaluation of Strength Test Results of Concrete
ACI 301 Specifications for Structural Concrete for Buildings ACI 318 Building Code Requirements for Reinforced Concrete ACI 347 Recommended Practice for Concrete Formwork
ASTM C 31 Test Methods of Making and Curing Concrete Test Specimens in the Field.
ASTM C 33 Specification for Concrete Aggregates.
ASTM C 39 Test Method for Compressive Strength of Cylindrical Concrete Specimens.
ASTM C 94 Specification for Ready-Mixed Concrete.
ASTM C 136 Test Method for Chemical Analysis of Fine and Coarse Aggregates.
ASTM C 143 Test Method for Slump of Hydraulic Cement Concrete.
ASTM C 150 Specification for Portland Cement.
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ASTM C 156 Test Method for Water Retention by Concrete Curing Materials.
ASTM C 192 Test Method of Making and Curing Concrete Test Specimens in the Laboratory.
ASTM C 260 Specification for Air-Entraining Admixtures for Concrete.
ASTM C 494 Specification for Chemical Admixtures for Concrete.
ASTM C 618 Standard Specification for Coal Fly ash and Raw or Calcined Natural Pozzolan for Use in Concrete.
1.3 CONTRACTOR SUBMITTALS
A. Mix Designs: Prior to beginning the WORK, the CONTRACTOR shall submit to the ENGINEER, for review, preliminary concrete mix designs that show the proportions and gradations of all materials proposed for each class and type of concrete specified herein.
The mix designs shall be designed by an independent testing laboratory acceptable to the ENGINEER. All costs related to such mix design shall be borne by the CONTRACTOR. This Specification sets the minimum requirements for mix design that meets all requirements specified herein.
B. Certified Delivery Tickets: Where ready-mix concrete is used, the CONTRACTOR shall furnish certified weighmaster delivery tickets at the time of delivery of each load of concrete. Each certificate shall show the public weighmasters signature, and the total quantities by weight of cement, sand, each class of aggregate, admixtures, and the amounts of water in the aggregate and added at the batching plant, as well as the amount of water allowed to be added at the site for the specific design mix. Each certificate shall, in addition, state the mix number, total yield in cubic yards, and the time of day to the nearest minute, corresponding to the times when the batch was dispatched, when it left the plant, when it arrived at the job, the time that unloading began, and the time that unloading was finished.
C. When a water-reducing admixture is to be used, the CONTRACTOR shall furnish mix designs for concrete both with and without the admixture.
1.4 QUALITY ASSURANCE
A. Unless otherwise specified, all formwork shall conform to ACI 347.
B. The cost of all laboratory tests on cement, aggregates, and concrete will be borne by the CITY. However, the CONTRACTOR shall be charged for the cost of any additional tests and investigation on WORK performed that does not meet the requirements of the Contract Documents.
C. Concrete for testing shall be supplied by the CONTRACTOR at no additional cost to the CITY, and the CONTRACTOR shall provide assistance to the ENGINEER in obtaining samples and disposing and cleaning up excess material. Concrete samples for slump, air content, and test cylinders will be taken at the placement (discharge) end of the line.
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D. Field Compression Tests:
1. Compression test specimens will be taken during construction from the first placement of each class of concrete specified herein and at intervals thereafter as selected by the ENGINEER to ensure continued compliance with the Contract Documents. Each set of test specimens will be a minimum of four (4) cylinders.
2. Compression test specimens for concrete shall be made in accordance with ASTM C 31, Section 9.2. Specimens shall be 6 inch diameter by 12 inch high cylinders.
3. Compression tests shall be performed in accordance with ASTM C 39. One (1) test cylinder will be tested at seven (7) days and two (2) test cylinders will be tested at twenty-eight (28) days. The remaining cylinder will be held to verify test results, if needed.
E. Evaluation and Acceptance of Concrete
1. Evaluation and acceptance of the compressive strength of concrete shall be according to the requirements of ACI 381, Chapter 5, Concrete Quality, and as specified herein.
2. A statistical analysis of compression test results will be performed according to the requirements of ACI 214. The standard deviation of the test results shall not exceed 640 psi.
3. If any concrete fails to meet these requirements, immediate corrective action shall be taken to increase the compressive strength for all subsequent batches of the type of concrete affected.
4. When the standard deviation of the test results exceeds 640 psi, the average strength for which the mix is designed shall be increased by an amount necessary to satisfy the statistical requirement that the probability of any test being more than 500 psi below or the average of any three (3) consecutive tests being below the specified compressive strength is 1 in 100. The required average strength shall be calculated by Criterion No. 3 of ACI 214 using the actual standard of deviation.
5. All concrete that fails to meet the ACI requirements and these Contract Documents is subject to removal and replacement at the expense of the CONTRACTOR.
PART 47 - PRODUCTS
1.1 CONCRETE MATERIALS
A. Materials shall be delivered, stored, and handled so as to prevent breakage or damage by water or sunlight. Only one (1) brand of cement shall be used. Cement reclaimed from cleaning bags or leaking containers shall not be used. All cement shall be used in the sequence of receipt of shipments.
B. All materials furnished for the WORK shall comply with the requirements of ACI 301, Sections 201, 203, and 204, as applicable.
C. Materials for concrete shall conform to the following requirements:
1. Cement shall be standard brand, Portland cement conforming to ASTM C 150 for Type II or Type V, containing not more than 0.60 percent alkalies.
2. Water for mixing and curing shall be potable, clean, and free from objectionable quantities of silty organic matter, alkali, salts, and other impurities.
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3. Aggregates shall be obtained from pits acceptable to the ENGINEER, shall be nonreactive, and shall conform to ASTM C 33. Lightweight sand for fine aggregate will not be permitted.
4. Ready-mix concrete shall conform to the requirements of ASTM C 94.
5. Admixtures: All admixtures shall be compatible and by a single manufacturer capable of providing qualified field service representation. Admixtures shall be used in accordance with manufacturers recommendations. If the use of an admixture is producing an inferior end result, the CONTRACTOR shall discontinue use of the admixture. Admixtures shall not contain thiocyanates nor more than 0.05 percent chloride ion and shall be nontoxic after thirty (30) days. a. Set controlling and water reducing admixtures : Admixtures may be added at the CONTRACTORs option to control the set, effect water reduction, and increase workability. The addition of an admixture shall be at the CONTRACTORs expense. The use of an admixture shall be subject to acceptance by the ENGINEER. Admixtures specified herein shall conform to the requirements of ASTM C 494. The required quantity of cement shall be used in the mix regardless of whether or not an admixture is used. 1) Concrete shall not contain more than one (1) water reducing mixture.
Concrete containing an admixture shall be first placed at a location determined by the ENGINEER.
2) Set controlling admixture shall be either with or without water-reducing properties. Where the air temperature at the time of placement is expected to be consistently over 80 degrees Fahrenheit, a set retarding admixture such as Plastocrete by Sika Corporation; Pozzolith 300R by BASF; Daratard by W.R. Grace ; or approved equal shall be used. Where the air temperature at the time of placement is expected to be consistently under 40 degrees Fahrenheit, a noncorrosive set accelerating admixture such as Plastocrete 161FL by Sika Corporation; Pozzutec 20 by BASF; Daraset by W.R. Grace; or approved equal shall be used. 3) Normal range water reducer shall conform to ASTM C 494, Type A, such as WRDA 79 by W.R. Grace; Pozzolith 322-N by BASF; Plastocrete 161 by Sika Corporation; or approved equal. The quantity of admixture used and the method of mixing shall be in accordance with the manufacturers instructions and
recommendations.
4) High range water reducer shall conform to ASTM C 494, Type F or G, such as Duracem 100 or WDRA 19 by W.R. Grace; Sikament FF or Sikament 86 by Sika Corporation; Rheobuild 1000 or Rheobuild 716 by BASF; or approved equal. High range water reducer shall be added to the concrete after all other ingredients have been mixed and initial slump has been verified. No more than fourteen (14) ounces of water reducer per sack of cement shall be used. Water reducer shall be considered as part of the mixing water when calculating water/cement ratio.
5) If the high-range water reducer is added to the concrete at the job site, it may be used in conjunction with the same water reducer added at the batch plant. Concrete shall have a slump of 3 inches plus or minus 1/2 inch prior to adding the high-range, water-reducing admixture at the job site. The high-range, water-reducing mixture shall be
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accurately measured and pressure injected into the mixer as a single dose by an experienced technician. A standby system shall be provided and tested prior to each days operation of the job site system.
6) Concrete shall be mixed at mixing speed for a minimum of thirty (30) mixer revolutions after the addition of the high-range water reducer.
6. Fly ash shall conform with ASTM C 618, Type F. Fly Ash may replace 15-25 percent of cement, by weight.
1.2 CURING MATERIALS
Materials for curing concrete, as specified herein, shall conform to the following requirements and ASTM C 309:
A. Concrete curing compound shall be white-pigmented and resin-based. Sodium silicate compounds will not be allowed. Concrete curing compound shall be MC 429 by the BASF Company; Spartan Cote Cure-Seal Hardener by the Burke Company; Super Rez Seal by Euclid Chemical Company; or approved equal.
B. Polyethylene sheet for use as concrete curing blanket shall be white and shall have a nominal thickness of 6 mils. The loss of moisture, when determined in accordance with the requirements of ASTM C 156, shall not exceed 0.0078 pounds per square inch of surface.
1.3 EPOXY ADHESIVES
Epoxy adhesives for bonding freshly mixed, plastic concrete to hardened concrete shall be Sikadur 32 Hi-Mod Epoxy Adhesive, as manufactured by Sika Chemical Corporation; Concresive Liquid (LPL), as manufactured by BASF; BurkEpoxy mV, as manufactured by the Burke Company, or approved equal.
Epoxy adhesives for bonding hardened concrete to steel shall be Sikadur 31 Hi-Mod Gel, as manufactured by Sika Corporation; BurkEpoxy NS, as manufactured by the Burke Company; Concresive Paste (LPL), as manufactured by BASF, or approved equal.
1.4 CONCRETE DESIGN REQUIREMENTS
A. General: Concrete shall be composed of cement, admixtures, aggregates, and water.
These materials shall be of the qualities specified. The exact proportions in which these materials are to be used for different parts of the WORK will be determined during the trial batch. In general the mix shall be designed to produce a concrete capable of being deposited so as to obtain maximum density and minimum shrinkage and, where deposited in forms, to have good consolidation properties and maximum smoothness of surface. Mix designs with more than 41 percent of sand of the total weight of the fine and coarse aggregate shall not be used. The aggregate gradations shall be formulated to provide fresh concrete that will not promote rock pockets around reinforcing steel or embedded items. The proportions shall be changed whenever necessary or desirable to meet the required results at no additional cost to the CITY. All changes shall be subject to review by the ENGINEER.
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B. Water/Cement Ratio and Compressive Strength: The minimum twenty-eight (28) day compressive strength of the concrete shall be 4,000 psi. The minimum cement content of concrete shall be 564 pounds per cubic yard. The maximum aggregate size shall be 1 inch, and the maximum water/cement ratio, by weight, shall be 0.45.
NOTE: The CONTRACTOR is cautioned that the limiting parameters specified above are not a mix design. Additional cement or water-reducing agent may be required to achieve workability demanded by the CONTRACTORs construction methods and aggregates. The CONTRACTOR is responsible for any costs associated with furnishing concrete with the required workability.
C. Adjustments to Mix Design: The mixes used shall be changed whenever such change is necessary or desirable to secure the required strength, density, workability, and surface finish, and the CONTRACTOR shall be entitled to no additional compensation because of such changes.
1.5 CONSISTENCY
The quantity of water entering into a batch of concrete shall be just sufficient, with a normal mixing period, to produce a concrete which can be worked properly into place without segregation and which can be compacted by the vibratory methods herein specified to give the desired density, impermeability, and smoothness of surface. The quantity of water shall be changed as necessary, with variations in the nature or moisture content of the aggregates, to maintain uniform production of a desired consistency. The consistency of the concrete in successive batches shall be determined by slump tests in accordance with ASTM C 143. The slump shall be 3 inches, plus or minus 1 inch.
1.6 LABORATORY TESTS
The determination of compressive strength will be made by testing 6 inch diameter by 12 inch high cylinders. Test cylinders shall be made, cured, and tested in accordance with ASTM C 192 and ASTM C 39. Three (3) compression test cylinders will be tested at seven (7) days, and three test cylinders will be tested at twenty-eight (28) days. The average compressive strength for the three (3) cylinders tested at twenty-eight (28) days for any given trial batch shall not be less than 125 percent of the specified compressive strength.
1.7 MEASUREMENT OF CEMENT AND AGGREGATE
The amount of cement and of each separate size of aggregate entering into each batch of concrete shall be determined by direct weighing equipment furnished by the CONTRACTOR and acceptable to the ENGINEER, provided that where batches are so proportioned as to contain an integral number of conventional sacks of cement and the cement is delivered at the mixer in the original unbroken sacks, the weight of the cement contained in each sack may be taken without weighing as ninety-four (94) pounds.
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1.8 MEASUREMENT OF WATER
The quantity of water entering the mixer shall be measured by a suitable water meter or other measuring device of a type acceptable to the ENGINEER and capable of measuring the water in variable amounts within a tolerance of one percent (1%). The water feed control mechanism shall be capable of being locked in position so as to deliver constantly any specified amount of water to each batch of concrete. A positive, quick- acting valve shall be used for a cut-off in the water line to the mixer. The operating mechanism shall be such that leakage does not occur when the valves are closed.
1.9 READY-MIXED CONCRETE
A. At the CONTRACTORs option, ready-mixed concrete meeting the requirements as to materials, batching, mixing, transporting, and placing, as specified herein and in accordance with ASTM C 94, including the supplementary requirements, may be used.
B. Ready-mixed concrete shall be delivered to the site of the WORK, and discharge shall be completed within one (1) hour after the addition of the cement to the aggregates or before the drum has been revolved two hundred fifty (250) revolutions, whichever is first.
In hot weather, or under conditions contributing to quick stiffening of the concrete, or when the temperature of the concrete is 85 degrees Fahrenheit or above, the time between the introduction of the cement to the aggregates and discharge shall not exceed forty-five (45) minutes.
C. Truck mixers shall be equipped with electrically actuated counters by which the number of revolutions of the drum or blades may be readily verified. The counter shall be of the resettable, recording type and shall be mounted in the drivers cab. The counters shall be actuated at the time of starting mixers at mixing speeds.
D. Each batch of concrete shall be mixed in a truck mixer for not less than seventy (70) revolutions of the drum or blades at the rate of rotation designated by the manufacturer of the equipment. Additional mixing, if any, shall be at the speed designated by the manufacturer of the equipment as agitating speed. All materials, including mixing water, shall be in the mixer drum before actuating the revolution counter for determining the number of revolutions of mixing.
E. Truck mixers and their operation shall be such that the concrete throughout the mixed batch as discharged is within acceptable limits of uniformity with respect to consistency, mix, and grading. If slump tests taken at approximately the one-quarter and three-quarter points of the load during discharge give slumps differing by more than 1 inch, then the mixer shall not be used on the WORK unless the causing condition is corrected and satisfactory performance is verified by additional slump tests. All mechanical details of the mixer, such as water measuring and discharge apparatus, condition of the blades, speed of rotation, general mechanical condition of the unit, and clearance of the drum shall be checked before a further attempt to use the unit will be permitted.
F. Each batch of ready-mixed concrete delivered at the job site shall be accompanied by a certified weighmaster delivery ticket furnished to the ENGINEER.
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G. The use of non-agitating equipment for transporting ready-mixed concrete will not be permitted. Combination truck and trailer equipment for transporting ready-mixed concrete will not be permitted.
PART 48 - EXECUTION
1.1 PROPORTIONING AND MIXING
A. Proportioning: Proportioning of the concrete mix shall conform to the requirements of ACI 301, Chapter 3, Proportioning.
B. Mixing: Mixing of concrete shall conform to ACI 301, Chapter 7.
C. Slump: Maximum slumps shall be as specified herein.
D. Retempering: Retempering of concrete or mortar that has partially hardened shall not be permitted.
1.2 PREPARATION OF SURFACES FOR CONCRETING
A. Earth surfaces shall be thoroughly wetted by sprinkling prior to the placing of any concrete, and these surfaces shall be kept moist by frequent sprinkling up to the time of placing concrete thereon. The surface shall be free from standing water, mud, and debris at the time of placing concrete.
B. All reinforcement and similar items shall be set and secured in the forms where shown on the Project Drawings or by shop drawings and shall be acceptable to the ENGINEER before any concrete is placed. Accuracy of placement is the responsibility of the CONTRACTOR.
C. Embedded Items: No concrete shall be placed until all form work, installation of parts to be embedded, reinforcing steel, and preparation of surfaces involved in the placing have been completed and accepted by the ENGINEER at least four (4) hours before placement of concrete. All surfaces of forms and embedded items that have become encrusted with dried grout from concrete previously placed shall be cleaned of all such grout before the surrounding or adjacent concrete is placed.
D. All reinforcement, anchor bolts, sleeves, inserts, and similar items shall be set and secured in the forms where shown on the Project Drawings or by shop drawings and shall be acceptable to the ENGINEER before any concrete is placed. Accuracy of placement is the responsibility of the CONTRACTOR.
E. Casting New Concrete Against Old: Where concrete is to be cast against old concrete (any concrete which is greater than sixty (60) day of age), the surface of the old concrete shall be thoroughly cleaned and roughened by sandblasting (exposing aggregate). An epoxy adhesive bonding agent shall be applied to the old surface according to the manufacturers written recommendations.
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F. No concrete shall be placed in any structure until all water entering the space to be filled with concrete has been properly cut off or has been diverted by pipes (or other means), and carried out of the forms, clear of the WORK. No concrete shall be deposited underwater nor shall the CONTRACTOR allow still water to rise on any concrete until the concrete has attained its initial set. Water shall not be permitted to flow over the surface of any concrete in such manner and at such velocity as will injure the surface finish of the concrete. Pumping or other necessary dewatering operations for removing groundwater, if required, will be subject to the review of the ENGINEER.
G. Openings for pipes, inserts for pipe hangers and brackets, and the setting of anchors shall, where practicable, be provided for during the placing of concrete.
H. Anchor bolts shall be accurately set and shall be maintained in position by templates while being embedded in concrete.
I. Cleaning: The surfaces of all metalwork to be in contact with concrete shall be thoroughly cleaned of all dirt, grease, loose scale and rust, grout, mortar, and other foreign substances immediately before the concrete is placed.
1.3 HANDLING, TRANSPORTING, AND PLACING
A. General: Placing of concrete shall conform to the applicable requirements of ACI 301, Chapter 8, and the requirements of this Section. No aluminum materials shall be used in conveying any concrete.
B. Unauthorized Placement: No concrete shall be placed except in the presence of the ENGINEER. The CONTRACTOR shall notify the ENGINEER in writing at least twenty- four (24) hours in advance of placement of any concrete.
C. Cold Weather Placement: Earth foundations shall be free from frost or ice to a minimum depth of 6 inches when concrete is placed upon or against them. The concrete temperature shall be maintained above 50 degrees Fahrenheit for at least three (3) days after placement.
1.4 FINISHING CONCRETE SURFACES
A. General: Surfaces of curbs, gutters, sidewalks, and driveways shall be free from fins, bulges, ridges, offsets, or honeycombing and shall present a finished, continuously hard surface. Aluminum finishing tools shall not be used.
B. Unformed Surfaces: After proper and adequate vibration and tamping, all unformed top surfaces shall be brought to a uniform surface with suitable tools. For unformed concrete surfaces, sufficient leveling and screeding shall be provided to produce an even, uniform surface with surface irregularities not to exceed 3/8 inch. No further special finish is required.
1.5 PROTECTION
A. The CONTRACTOR shall protect all concrete against injury until final acceptance by the CITY.
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B. Fresh concrete shall be protected from damage due to rain, hail, sleet, or snow. The CONTRACTOR shall provide such protection while the concrete is still plastic and whenever precipitation is imminent or occurring.
1.6 CARE AND REPAIR OF CONCRETE
The CONTRACTOR shall protect all concrete against injury or damage from excessive heat, lack of moisture, overstress, or any other cause until final acceptance by the CITY.
Particular care shall be taken to prevent the drying of concrete and to avoid roughening or otherwise damaging the surface. Any concrete found to be damaged, or that may have been originally defective, or which becomes defective at any time prior to the final acceptance of the completed WORK, or which departs from the established line or grade, or which for any other reason does not conform to the requirements of the Contract Documents shall be satisfactorily repaired or removed and replaced with acceptable concrete at the CONTRACTORs expense.
END OF SECTION
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SECTION 18 GENERAL PIPING
PART 49 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish all labor, materials, and tools necessary to install, test, and complete the piping in accordance with the Contract Documents.
1.2 QUALITY ASSURANCE
A. Like items of materials provided hereunder shall be the end products of one manufacturer in order to achieve standardization for appearance and manufacturers service.
B. To assure uniformity and compatibility of piping components in piping systems, fittings and couplings shall be furnished by the same manufacturer.
1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. CITY standards and specifications shall be met at all times unless otherwise noted.
C. The materials and work performed in this Section shall conform to the applicable standards of the latest edition of the following references. In case of a conflict between the requirements of this Section and those of the listed documents, the requirements of this Section shall prevail.
Commercial Standards:
ANSI American National Standards Institute
ASTM American Society for Testing and Materials
UBC Uniform Building Code
UPC Uniform Plumbing Code
PART 50 - PRODUCTS
1.1 GENERAL
Provide all required piping and fittings in accordance with the individual piping sections.
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1.2 WARNING TAPE
Warning tape shall indicate type of pipeline and shall be specifically designed for this use. Warning tape shall be green in color. The warning tape shall be minimum 12-inches wide and printed continuously with the words "CAUTION: SEWER LINE BELOW". The warning tape shall be 4.0 mil thickness minimum, linear low-density polyethylene specifically formulated for extended use underground and shall be placed in accordance with the Contract Documents.
PART 51 - EXECUTION
1.1 PREPARATION
A. Prior work: Dewatering shall be accomplished in accordance with the requirements of Section 2, Dewatering.
B. Layout of Controls : The CONTRACTOR shall establish line and grade control and staking in accordance with the Contract Documents.
1.2 EXCAVATION AND TRENCHING
Perform all excavations for pipelines and appurtenances, of whatever substances encountered, to the depths indicated in the Contract Documents and in accordance with Section 4, Earthwork.
1.3 INSTALLATION
A. General:
1. Each pipe and fitting shall be carefully inspected before the buried pipe or fitting is lowered into the trench. The interior and exterior protective coating shall be inspected, and all damaged areas patched in the field with material similar to the original. Clean ends of pipe thoroughly. Remove foreign matter and dirt from inside of pipe and keep clean during and after laying.
2. Clean out fittings and pipe sections before installing.
3. Furnish and assemble pipe and fittings to provide accurate alignment for joints.
4. Make all joints watertight.
5. Provide temporary plugs or bulkheads for closure of the open ends of piping whenever WORK is stopped.
6. Use proper implements, tools, and facilities for the safe and proper protection of the pipe. Carefully handle pipe in such a manner as to avoid any physical damage to the pipe. Do not drop or dump pipe into trenches under any circumstances.
B. Buried Pipe:
1. Do not deviate more than 1 inch from lines or 1/4 inch from grade, unless reviewed and accepted by the ENGINEER. Measure for grade at the pipe invert, not at the top of the pipe, because of permissible variation in pipe wall thickness.
2. Grade the bottom of the trench by hand to the line and grade to which the pipe is to be laid, with proper allowance for pipe thickness and for gravel bedding when required. Remove hard spots that would prevent a uniform thickness of bedding.
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Before laying each section of the pipe, check the grade with a straight edge and correct any irregularities found. The trench bed shall form a continuous and uniform bearing and support for the pipe at every point between bell holes, except that the grade may be disturbed for the removal of lifting tackle.
3. At the location of each joint, dig bell (joint) holes of ample dimensions in the bottom of the trench and at the sides, where necessary, to permit easy visual inspection of the entire joint.
4. Provide and maintain ample means and devices at all times to remove and dispose of all water entering the trench during the process of pipe laying. The trench shall be kept dry until the pipe laying and jointing are completed.
5. When pipe laying is not in progress, including the noon hours, the open ends of pipe shall be closed by approved means, and no trench water, animals, or foreign material shall be permitted to enter the pipe.
6. Minimum pipe cover in the trench shall be 3 feet, unless otherwise indicated.
7. All buried pipe shall be prepared as hereinbefore specified and shall be laid on the prepared granular base and bedded in accordance with the Contract Documents to ensure uniform bearing. No pipe shall be laid in water or when, in the opinion of the ENGINEER, trench conditions are unsuitable. Joints shall be made as herein specified for the respective types. Take all precautions necessary to prevent uplift and floating of the pipe prior to backfilling.
8. Where the pipe is to be connected to concrete structures, the connection shall be made as indicated in the Contract Documents.
1.4 CLEANING
A. Care shall be exercised during fabrication to prevent the accumulation of pipe cuttings, and filings, gravel, cleaning rags, etc., within piping sections. All piping shall be examined to assure removal of these and other foreign objects prior to assembly. Shop cleaning may employ any conventional commercial cleaning method if it does not corrode, deform, swell, or otherwise alter the physical properties of the material being cleaned.
B. Following assembly and testing and prior to final acceptance, all pipelines installed under this Section shall be flushed with high-velocity water or flushed with cleaning ball, and all accumulated construction debris and other foreign matter removed. Flushing velocities shall be a minimum of 2½ feet per second.
END OF SECTION
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SECTION 19 POLYVINYL-CHLORIDE PIPE
PART 52 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish and install all underground polyvinyl-chloride (PVC), non-pressure pipe and all appurtenant WORK, complete and in place, all in accordance with the Contract Documents.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. Commercial Standards:
ASTM C 425 Specification for Compression Joints for Vitrified Clay Pipe and Fittings
ASTM D 1784 Specification for Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds
ASTM D 2241 Specification for Poly (Vinyl Chloride) (PVC) Pressure-Rated Pipe (SDR-Series)
ASTM D 2321 Recommended Practice for Underground Installation of Flexible Thermoplastic Sewer Pipe
ASTM D 3034 Specification for Type PSM Poly (Vinyl Chloride) (PVC) Sewer Pipe and Fittings
ASTM F477 Standard Specification for Elastomeric Seals (Gaskets) for Joining Plastic Pipe
ASTM F 794 Standard Specification for Poly (Vinyl Chloride) (PVC) Profile Gravity Sewer Pipe and Fittings Based on Controlled Inside Diameter
ASTM F 1803 Standard Specification for Closed Profile Polyvinyl (PVC) Chloride Pipe with a Controlled Inside Diameter
1.3 CONTRACTOR SUBMITTALS
A. Shop Drawings : The CONTRACTOR shall submit shop drawings of all pipe, joints, bends, special fittings, and piping appurtenances.
B. Certificates: The CONTRACTOR shall provide manufacturers certificates for all materials indicating conformance to the Contract Documents.
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1.4 QUALITY ASSURANCE
A. Testing: All materials testing will be based upon applicable ASTM Test Methods, as referenced herein for the materials specified.
B. All costs of such inspection and tests shall be borne by the CONTRACTOR.
C. Certificates: Manufacturers notarized certificates of compliance shall be furnished by the CONTRACTOR.
1.5 DELIVERY, STORAGE, AND HANDLING
A. All plastic materials should be stored out of direct sunlight.
PART 53 - PRODUCTS
1.1 GENERAL
A. All PVC pipe shall be continuously and permanently marked with the manufacturers name, pipe size, and pressure rating in psi and in conformance with the appropriate ASTM.
B. The CONTRACTOR shall require the manufacturer to mark the date of extrusion on the pipe. This dating shall be done in conjunction with records to be held by the manufacturer for two (2) years, covering quality control tests, raw material batch number, and other information deemed necessary by the manufacturer.
C. Pipe and fittings shall be colored green for in-ground identification as sewer pipe.
1.2 PIPE
A. All PVC pipe shall conform to the requirements of ASTM D 3034, Class SDR 26. Material for PVC pipe shall be manufactured from rigid, unplasticized polyvinyl chloride compound conforming to the requirements of ASTM D 1784 for Class 12454 or 12364.
1.3 FITTINGS
A. Pipe fittings shall be of the same material and rated for the same pressure as the pipe.
Fittings shall conform to the appropriate dimensions to accept the pipe as described above.
1.4 JOINTS
A. Pipe and fittings shall be joined by gasketed compression joints with integral bell and spigot unless otherwise indicated in the Contract Documents.
B. Gaskets for compression-type joints for PVC pipe and fittings shall conform to the requirements of ASTM F477.
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1.5 BEDDING MATERIAL
Pipe bedding material shall conform to the requirements of Section 4, Earthwork.
1.6 FLEXIBLE COUPLINGS
Flexible couplings shall be rubber, full-circle, clamp-on type conforming to ASTM C 425 and provided with two stainless-steel band, screw clamps to secure the coupling tightly to entering and exiting pipes. All screw-clamp hardware shall be Type 316 stainless steel.
Rubber material shall be suitable for sewage service.
1.7 WARNING TAPE
Install warning tape in accordance with Section 17, General Piping.
PART 54 - EXECUTION
1.1 GENERAL
A. All laying, jointing, and testing for defects and for leakage shall be performed in the presence of the ENGINEER and shall be subject to inspection before acceptance. All material found during the progress of the WORK to have defects will be rejected, and the CONTRACTOR shall promptly remove such defective materials from the site of the WORK.
B. Installation shall conform to the requirements of ASTM D 2321 and to the supplementary requirements or modifications specified herein. Wherever the provisions of this Section and the requirements of ASTM D 2321 are in conflict, the more stringent provision shall apply.
1.2 TRENCHING AND BACKFILL
A. Trench excavation and backfill shall conform to the requirements of Section 4, Earthwork.
1.3 LAYING PIPE
A. The pipe shall be installed in accordance with the requirements of ASTM D 2321 and as indicated in the Contract Documents. The Sections shall be closely jointed to form a smooth flow line. Immediately before placing each section of pipe in final position for jointings, the bedding for the pipe shall be checked for firmness and uniformity of surface.
B. Proper implements, tools, and facilities, as recommended by the pipe manufacturers standard printed installation instructions, shall be provided and used by the CONTRACTOR for safe and efficient execution of the WORK. All pipe, fittings, and accessories shall be carefully lowered into the trench by means of derrick, ropes, or other suitable equipment in such a manner as to prevent damage to pipe and fittings. Under no circumstances shall pipe or accessories be dropped or dumped into the trench.
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C. Cutting and machining of the pipe shall be accomplished in accordance with the pipe manufacturers standard procedures for this operation. Pipe shall not be cut with a cold- chisel, standard-iron, pipe cutter, nor any other method that may fracture the pipe or produce ragged, uneven edges.
D. The pipe and accessories shall be inspected for defects prior to lowering into the trench.
Any defective, damaged, or unsound pipe shall be repaired or replaced. All foreign matter or dirt shall be removed from the interior of the pipe before lowering into position in the trench. Pipe shall be kept clean during and after laying. All openings in the pipeline shall be closed with watertight, expandable-type sewer plugs or PVC test plugs at the end of each days operation or whenever the pipe openings are left unattended. The use of burlap, wood, or other similar temporary plugs will not be permitted.
E. Adequate protection and maintenance of all underground and surface utility structures, drains, sewers, and other obstructions encountered in the progress of the WORK shall be furnished by the CONTRACTOR, at its own expense, under the direction of the ENGINEER.
F. Where the grade or alignment of the pipe is obstructed by existing utility structures, such as conduits, ducts, pipes, branch connections to main sewers, or main drains, the obstruction shall be permanently supported, relocated, removed, or reconstructed by the CONTRACTOR in cooperation with owners of such utility structures. Unless otherwise indicated, this WORK shall be performed at the CONTRACTORs expense.
1.4 HANDLING
A. Handling of the PVC pipe shall be done with care to ensure that the pipe is not damaged in any manner during storage, transit, loading, unloading, and installation.
B. Pipe shall be inspected both prior to and after installation in the trench, and all defective lengths shall be rejected and immediately removed from the working area.
1.5 FIELD JOINTING
A. Each pipe-compression-type joint shall be joined with a lock-in rubber ring and a ring groove that is designed to resist displacement during pipe insertion.
B. The ring and the ring seat inside the bell shall be wiped clean before the gasket is inserted. At this time, a thin film of lubricant shall be applied to the exposed surface of the ring and to the outside of the clean pipe end. Lubricant other than that furnished with the pipe shall not be used. The end of the pipe shall then be forced into the ring to complete the joint.
C. The pipe shall not be deflected either vertically or horizontally in excess of the printed recommendations of the manufacturer of the coupling.
D. When pipe laying is not in progress, the open ends of the pipe shall be closed to prevent trench water from entering pipe. Adequate backfill shall be deposited on pipe to prevent floating of pipe. Any pipe that has floated shall be removed from the trench, cleaned, and
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relaid in an acceptable manner. No pipe shall be laid when, in the opinion of the ENGINEER, the trench conditions or weather are unsuitable for such work.
1.6 INSTALLATION OF FITTINGS
Fittings shall be installed utilizing standard installation procedures. Fittings shall be lowered into trench by means of rope, cable, chain, or other acceptable means without damage to the fittings. Cable, rope, or other devices used for lowering fittings into trenches shall be attached around exterior of fittings for handling. Under no circumstances shall the cable, rope, or other device be attached through the fittings interior for handling. Fittings shall be carefully connected to pipe or other facility, and joint shall be checked to ensure a sound and proper joint.
1.7 WARNING TAPE INSTALLATION
Warning tape shall be installed with all PVC sewer main pipes. The tape shall be installed along the pipe axis in the backfill minimum 12 inches above the crown of the pipe.
1.8 TESTING
Field testing of PVC gravity sewer pipe shall conform to the requirements of Section 12, Sanitary Sewer System Testing.
END OF SECTION
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SECTION 20 HIGH-DENSITY POLYETHYLENE PIPE
PART 55 - GENERAL
1.1 THE REQUIREMENT
The CONTRACTOR shall furnish, install, and test, complete and in place, high-density polyethylene (HDPE) pipe and fittings, in accordance with the Contract Documents. The HDPE pipe and fittings specified herein shall be used only in association with pipe bursting, unless otherwise approved by the ENGINEER.
1.2 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Codes: All WORK shall comply with all codes, as referenced herein.
B. Commercial Standards:
ASTM D 638 Test Method for Tensile Properties of Plastics ASTM D 790 Standard Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials ASTM D 1238 Test Method for Flow Rates of Thermoplastics by Extrusion Plastometer
ASTM D 1248 Specification for Polyethylene Plastics Molding and Extrusion Materials
ASTM D 1505 Test Method for Density of Plastics by the Density-Gradient Technique
ASTM D 2657 Practice for Heat Joining of Polyolefin Pipe and Fittings ASTM D 3261 Specification for Butt Heat Fusion Polyethylene (PE) Plastic Fittings for Polyethylene (PE) Plastic Pipe and Tubing
ASTM D 3350 Specification for Polyethylene Plastic Pipes and Fittings Materials
ASTM F 585 Standard Guide for Insertion of Flexible Polyethylene Pipe into Existing Sewers
ASTM F 714 Specification for Polyethylene (PE) Plastic Pipe (SDR-PR) Based on Outside Diameter
1.3 SUBMITTALS
A. The CONTRACTOR shall furnish certificates to the ENGINEER certifying that the pipe and fittings furnished hereunder is in compliance with the requirements of the Contract Documents.
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B. All submittals shall be in accordance with the requirements of the Contract Documents.
C. Submit list of pipe and fittings to be used, which includes the following information where applicable:
1. List of pipe and fittings to be used
2. Manufacturer
3. Model number, if applicable
4. Size and schedule
5. Material
6. Pressure rating
7. Catalog data
8. Pipe joining methods and equipment, including specific procedures for fusion welding (pipe end cleaning, facing, joining, control of heating plate operation, documentation of jointing, debeading, etc.)
D. Shop Drawings: The CONTRACTOR shall submit detailed layouts and schematics describing the installation of all piping and fittings. The CONTRACTOR shall include site maps indicating all locations where butt-fusion welding work will occur, lay-down areas, pipe storage areas, insertion pits, and pulling pits.
E. Only technicians whom the pipe manufacturer or supplier has certified and who have a minimum of (3) years of experience fusion welding 6-inch or larger diameter pipelines and similar DR as that specified for this project on a minimum of three projects shall operate fusion equipment. Submit documentation on the technician's experience including a current (within the past three years) training certificate.
F. Certified reports for each fusion joint. Submit certified reports within 24 hours of making each joint. Joints for which proper records cannot be produced are subject to rejection.
Reports shall include the following minimum information that is clearly legible using both text and graphics as appropriate for the information presented:
1. Project name.
2. Pipe fusing contractor company name.
3. Make and model of fusing machine and data logger plus a unique identifier for the actual machines used, e.g., serial numbers.
4. Pipe data including size, dimension ratio, manufacturer, plant identification and production date.
5. Date and time of day when fusing starts and ends.
6. Unique identifier for each joint that correlates with an identifier physically marked on the pipe wall.
7. Approximate stationing of joint at joints final installation location.
8. Name of fusing machine technician responsible for fusion of joint.
9. Both heater plate surface temperature and hydraulic pressure vs. time. Time plot shall be concurrent for both temperature and pressure.
10. Profiles at a number of locations sufficient to indicate that joining was correctly or incorrectly performed.
G. The CONTRACTOR shall furnish to the ENGINEER quality control records, as required herein.
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PART 56 - PRODUCTS
1.1 GENERAL
A. Referenced pipe sizes are nominal pipe diameters.
B. All materials delivered to the job site shall be new, free from defects, and marked to identify manufacturer, material, class, and other appropriate information.
C. Acceptance of materials will be subject to strength and quality testing, in addition to inspection of the completed product. Acceptance of installed piping system will be based on inspection and leakage tests.
1.2 PIPING MATERIALS
A. Pipe shall be high density, high molecular weight polyethylene. The material shall be listed by the Plastic Pipe Institute (PPI) with a designation of PE 4710 and have a minimum cell classification of 445474C or higher as described in ASTM D3350. The pipe shall contain no recycled compound except that generated in the manufacturer's own plant from resin of the same specification from the same raw material pipe.
B. Pipe shall be homogeneous throughout and shall be free of visible cracks, holes, foreign material, blisters, or other deleterious faults. It shall be uniform in density and other physical properties. Any pipe not meeting these criteria shall be rejected.
C. Pipe shall be made in conformance with ASTM F714 and ASTM D3261 as modified for the specified material. Pipe shall be minimum DR 17 with a minimum pressure rating of 125 psi at 73 degrees Fahrenheit.
D. The physical properties of the pipe and fittings material shall be as follows:
PROPERTY TEST METHOD VALUE
Density ASTM D 1505 >0.947-0.955 gm/cm3
Melt Index ASTM D 1238 <0.15
Tensile Strength, Yield ASTM D 638 3,000 - <3,500 psi
Flexural Modulus ASTM D 790 110,000-160,000 psi
E. The pipe and fittings shall have a white or light gray coloring on the interior. The exterior shall have a green stripe for in-ground identification as sewer pipe.
F. The high-density polyethylene pipe shall be provided by the following, or approved equal:
1. Performance Pipe, Division of Chevron Phillips Chemical Co., LP, Houston, Texas
2. Isco Industries, Louisville, Kentucky
1.3 JOINTS
A. Joints in HDPE pipe shall be made using the thermal butt-fusion method confirming to ASTM D2657 and shall be performed in strict accordance with the pipe manufacturers
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recommendations. Welding equipment shall be designed for the specific purpose of permanently connecting HDPE pipes. This equipment shall be capable of squarely facing the pipe ends to be joined, properly heating each pipe end to the temperature range specified by the pipe manufacturer, and applying and sustaining the appropriate pressure, as recommended by the pipe manufacturer.
B. The butt-fusion welding machine shall be outfitted with a measuring and recording unit that documents the conditions existing during the fusion of each individual weld. A printout that includes the date and time each joint was made, the joint number, the initials of the machine operator, the plate temperature at the time of mating, the pressure during the heating cycle, the time period for the heating cycle, the pressure during the soak cycle, and the time period of the soak cycle shall be machine-generated and delivered to the ENGINEER at the end of each work shift. The recording unit shall be a DataLogger, as manufactured by McElroy Manufacturing, Inc., or approved equal.
C. Fusion equipment shall be operated by technicians who have been certified by a major gas public utility such as Pacific Gas and Electric or Southern California-Edison for operation of such equipment. Furthermore, all technicians performing butt-fusion welding on this project shall have a minimum of two (2) years experience operating the same equipment used hereon.
D. Butt-fusion welding equipment shall be as follows, or approved equal:
1. McElroy No. 412 Hydraulic Fusion Machine, McElroy Manufacturing, Tulsa, Oklahoma
2. Proweld Field 12 (315)-R, Asahi/America, Malden, Massachusetts
1.4 FITTINGS
A. The CONTRACTOR shall provide fabricated fittings where required. Fabricated fittings shall be of the same material as, and shall have a minimum pressure rating equal to, and shall be from the same manufacturer as the pipe material. If the fitting is in-line with the pipeline (i.e., a flange adapter), then the I.D. of the fitting shall be the same as the pipe. If the fitting is off-line (i.e., a tee), then the fitting shall have an I.D. in accordance with the Contract Documents. Unless otherwise required, all fittings shall be butt-fusion welded.
B. Terminations to pipe or fittings made of other pipe materials shall be made by using couplings.
1.5 FLEXIBLE COUPLINGS
A. Flexible couplings shall be rubber, full-circle, clamp-on type conforming to ASTM C 425 and provided with two stainless-steel band, screw clamps to secure the coupling tightly to entering and exiting pipes. All screw-clamp hardware shall be Type 316 stainless steel.
Rubber material shall be suitable for sewage service.
1.6 WARNING TAPE
A. Install warning tape in accordance with Section 17, General Piping.
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PART 57 - EXECUTION
1.1 HANDLING AND STORAGE
A. All pipe, fittings, etc., shall be carefully handled and protected against damage, impact shock, free fall, and scoring. All pipe handling equipment shall be acceptable to the ENGINEER. Pipe shall be stored in a manner that protects the pipe against injury or damage. Stacking of polyethylene pipe will not be allowed. All plastic materials should be stored out of direct sunlight.
B. The CONTRACTOR shall inspect each pipe and fitting prior to butt-fusion welding and again prior to installation. Any damaged pipe or fittings shall be repaired or replaced by the CONTRACTOR, at no additional expense to the CITY and to the satisfaction of the ENGINEER. Damage shall include, but not be limited to, gouges, cuts, or scratches of a depth greater than five percent (5%) of the pipe wall.
C. Prior to butt-fusion welding or installation, each pipe or fitting shall be thoroughly cleaned of any foreign substance that may have collected thereon and shall be kept clean at all times thereafter. The material used to clean the pipe and fittings shall be as recommended by the pipe manufacturer.
1.2 BUTT-FUSION WELDING
A. Only technicians who have been certified in accordance with the requirements of paragraph 1.4.E shall be allowed to operate the butt-fusion welding equipment.
B. Butt-fusion welds shall be performed in accordance with manufacturers instructions. The butt-fusion welding procedures are summarized below:
1. Clean each pipe end with a clean cotton cloth to remove dirt, oil, grease, and other foreign materials.
2. Square (face) the mating surfaces of each of the pipes to be fused.
3. Bring the two (2) pipe ends together and adjust the pipe locations to ensure proper alignment.
4. Verify that the surface temperature of the heater plate is between 375-400 degrees Fahrenheit and then clean the heater surface with a clean cotton cloth.
5. Insert the heater plate between the pipe ends, bring the ends into firm contact with the heater plate without applying pressure, and achieve a proper melt pattern.
6. After achieving the proper melt bead, remove the heater plate and quickly examine the pipe ends for complete melt.
7. Once complete melt has been accomplished, rapidly bring the pipe ends together and apply pressure as recommended by the pipe manufacturer.
8. Hold the pressure constant and at the proper level throughout the cooling period, for the minimum time period recommended by the pipe manufacturer or as necessary to achieve proper cooling.
9. Do not backfill or expose pipe to water or any medium that may accelerate cooling of the pipe until fused joints have reached ambient temperature. Joints shall not be loaded until they have properly cooled.
C. The CONTRACTOR shall mark each joint with the individual joint number, corresponding to the joint identification number appearing on the printout of the data logger attached to
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the butt-fusion welding machine. The printout shall be attached to the pipe near the joint for collection by the ENGINEER.
D. The CONTRACTOR shall remove both the internal and external melt bead from the welded joint. Bead removal shall be accomplished in a manner that does not score or gouge the pipe.
1.3 INSTALLATION
A. HDPE pipe shall be used for pipe bursting applications only, unless indicated otherwise in the Contract Documents or approved by the ENGINEER. The CONTRACTOR shall insert the pipe into the horizontal boring through properly prepared insertion and receiving pits, in accordance with the requirements of ASTM F 585.
B. The maximum pulling force that may be applied to any pipe shall be calculated as follows:
F = SA
where F = maximum pulling force on pipe (lb.)
S = maximum allowable stress (1000 psi)
A = cross-sectional area of pipe wall (square inches)
The cross-sectional area of the pipe wall shall be calculated as follows:
A = (D-t)t
where D = outside diameter (in)
t = minimum wall thickness (in)
C. The CONTRACTOR shall take care not to drag the pipe over rocks or rough surfaces that may damage the pipe. An appropriate pulling head shall be attached to the end of the pipe and shall be used for pulling the pipe at all times.
D. Manhole connections shall be made by attaching a collar to the end of the pipe and encasing the collar in the manhole wall using grout, in accordance with the Contract Documents. The collar shall not be used for pulling the pipe into the horizontal boring.
E. Following installation, the insertion and receiving pits, and any other excavations used, shall be backfilled in accordance with the requirements of Section 4, Earthwork.
1.4 TESTING
HDPE pipeline testing shall be performed in accordance with Section 12, Sanitary Sewer System Testing.
END OF SECTION
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APPENDIX A
DAILY WORK REPORT FORM
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DAILY WORK REPORT
Project Name: File No.: Date:
Contractor: Foreman: Weather:
Item # Description Unit New and Unforeseen Work [ ] None [ ] Yes, describe:
Equip. # Description Hours Hourly Rate Ext. Amount Emp. # Employee Name Hours Hourly Rate Ext. Amount
SUBTOTAL COST OF EQUIPMENT
Inv. # Description Unit Unit Cost Ext. Amount
SUBTOTAL COST OF MATERIALS SUBTOTAL COST OF LABOR
Inv. # Description Amount Subsistence
Travel Expense
Other
TOTAL COST OF LABOR
SUBTOTAL COST OF WORK DONE BY SPECIALISTS
+ 3% on labor
TOTAL COST OF EQUIPMENT, MATERIALS AND WORK
+ 15% on equipment and material
+ 5% on work done by specialists
Contractor Foreman Date CS & Reviewed By Date TOTAL COST
MATERIAL
WORK done by specialists
LABOR
CONTRACT WORK PERFORMED
Survey Station
DIARY AND REMARKS
EQUIPMENT
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APPENDIX B
CITY STANDARD DETAILS
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CITY OF SAN CARLOS, CALIFORNIA STANDARD DETAIL
The City of Good
Living
MANHOLE WALLS 13
STANDARD CONNECTION TO
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CITY OF SAN CARLOS, CALIFORNIA STANDARD DETAIL
The City of GoodLiving COVER AND FRAME14STANDARD MANHOLE
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APPENDIX C
Monte Vista Drive Geotechnical Report
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GEOTECHNICAL
ENVIRONMENTAL
WATER RESOURCES
CONSTRUCTION SERVICES
COASTAL/MARINE GEOTECHNICS
2350 Mission College Boulevard, Suite 800, Santa Clara, CA 95054 (408) 574-4900 [email protected] www.engeo.com
Project No.
13387.000.036
May 6, 2025
Mr. Alex Tat
Principal Engineer
City of San Carlos, Public Works Department
600 Elm Street
San Carlos, CA 94070
Subject: Monte Vista Drive
San Carlos, California
RECOMMENDATIONS FOR PROPOSED REPAIRS AND IMPROVEMENTS
Dear Mr. Tat:
As authorized by you, this letter presents our geotechnical recommendations for the Monte Vista Drive pavement and infrastructure repairs in San Carlos, California. We understand that two areas of failure were observed in 2025 along the northwestern lane of Monte Vista Drive. The purpose of our services is to provide our consultation and develop recommendations to repair the two areas of concern. Additionally, as requested via email on April 14, 2025, we provide recommendations for the replacement of an existing 30-foot section of 8-inch VCP sewer pipe.
Along the two areas where failures occurred, existing site improvements have been damaged from ground settlement and loss of soil. Damage has been observed along the curbs, sidewalks, and pavement areas , as roughly shown in Exhibit 1. The repair locations, and the segment of sanitary sewer to be replaced, are shown in Exhibit 1.
EXHIBIT 1: Improvement Limits (Nearmap Image, February 20, 2025)
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SITE LOCATION AND PROJECT DESCRIPTION
The two distinct areas of observed pavement distress identified in Exhibit 1. According to the City of San Carlos facilities personnel and historical aerial photography, depression of the sidewalk, curb, and roadway at Location 2 have been observed since 2022. The segment of the street is located as shown in Figure 1. We understand the failure at Location 1 was first observed in early 2025.
Additionally, the proposed improvements include replacement of an existing 30 -foot segment of 8-inch VCP sewer pipe between manhole MT/01 and BY/01 as shown in Figure 3.
SITE RECONNAISSANCE
We met with City of San Carlos representatives on site to observe the conditions in the two repair areas on February 24, 2024. Subsequently, we performed field explorations on March 25, 2025, consisting of three shallow borings. On March 31, 2025, we documented the current pavement conditions.
FIELD EXPLORATION
We observed drilling of three borings at the locations shown in the Site Plan, Figure 2. An ENGEO representative observed the drilling and logged the subsurface conditions at each location. We retained a truck -mounted drill rig and crew to advance the borings using 4 -inch-diameter solid-flight auger methods. The borings were advanced to depths ranging from 13 ½ to 19½ feet below existing grade. We permitted and backfilled the borings in accordance with the requirements of San Mateo County Health department.
We retrieved soil samples at various intervals in the borings using standard penetration tests and a 2½-inch O.D. split -spoon sampler. The blow counts were obtained by dropping a 140 -pound hammer through a 30-inch free fall. The 2-inch outside diameter (O.D.) split-spoon sampler was driven 18 inches and the number of blows was recorded for each 6 inches of penetration. In addition, 2.5 -inch inside diameter (I.D.) samples were obtained using a Modified California Sampler driven into the soil with the 140-pound hammer previously described. Unless otherwise indicated, the blows per foot recorded on the boring log represent the accumulated n umber of blows to drive the last 1 foot of penetration; the blow counts have not been converted using any correction factors. The logs depict subsurface conditions at the exploration locations during the exploration; however, subsurface conditions may vary with time. The exploration logs are included in Appendix A.
SUBSURFACE CONDITIONS
We encountered 3 to 3½ feet of non -engineered fill in borings 1-B1 and 1-B2 consisting of very loose gravel material. In boring 1-B1, we encountered an approximately 6-inch void space below the concrete gutter (which was centrally located in the depression) . In boring 1 -B3, we encountered approximately 11 feet of non-engineered fill consisting of clayey gravel and gravelly lean clay with brick, wood, and debris fragments.
Underlying the fill, in boring 1-B1 and 1-B2, we encountered approximately 5 feet of dark gray to black very soft to medium stiff fat clay. This highly compressible clay is locally known as Young Bay Mud. (YBM).
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Underlying the fill and YBM, we encountered alluvium material consisting of stiff to very stiff lean clay with various amounts of sand and gravel, as well as loose to medium dense sand with various amounts of clayey fines.
FINDINGS AND DISCUSSION
PHOTO 1: Sinkhole Condition at Location 1
(Looking Southwest)
Location 1 - At Location 1, the distress is roughly
centered over existing utilities - an active
Pacific Gas & Electric (PG&E) line and an
abandoned 8-inch vitrified clay pipe (VCP) sewer
line. According to your team, the sewer line was
abandoned but the annulus of the pipe was not
infilled due to sewer blockage in the pipe . The
PG&E line is roughly 3 feet below the ground
surface, whereas the sewer line is around 1 3 feet
below the ground surface. At this location, a
roughly 2 -foot-wide by 15-foot-long section of
pavement has broken through and there is
significant soil loss underneath the pavement ,
which has created a void (Photos 1 and 2) that
extends beneath the portion of the pavement which
had not yet broken (Photo 2) . A review of recent
aerial photographs did not show evidence of
long-term movement in Location 1. The settlement
and broken pavement appear to have occurred
recently and suddenly.
PHOTO 2: Cavity Extending Beneath Pavement at
Location 1
Location 2 - At Location 2, there is a circular
ground depression that appears to have
developed. The depressed area is roughly
30 feet in diameter with the lowest point
centered at an existing curb. We understand that this depression has resulted in water pooling when it rains. On March 31, 2025, we observed that the central area of depression was in the order of 6 inches lower than the perimeter areas of the depression.
Significant cracking in the existing sidewalk is apparent. Some cracks within the pavement are also evident. There is also a slight mound in the wooden fence that retains the property to the northwest (which is situated at an elevation roughly 2 feet higher than Monte Vista Drive).
The depressed area is visible in historical Google street-view imagery, as shown in Photos 3 through 5. It is possible that it has been present for an even longer time. It is not clear whether the depression is still progressing and worsening, or whether the movement has stopped.
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PHOTO 3: Depression Visible in Google Street-View (2022) at Location 2
PHOTO 4: Depression on March 31, 2025, at Location 2
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PHOTO 5: Depression on March 31, 2025, at Location 2
FINDINGS AND CONCLUSIONS
Location 1
Based on the observed field condition s at Location 1, it appears the cause of the pavement distress may have resulted from loss of subgrade soil. The PG&E line that lies above the old sanitary sewer line used finer sandy backfill material. It is possible that finer backfill material above the existing 152-foot segment of 8 -inch VCP sewer pipe may have piped into openings to the VCP resulting in a sink hole.
Public Works indicated a pipe televiewer was unable to be performed due to material blockage encountered in the sewer line ; therefore, further providing evidence that the pipe may have allowed soil and materials to transport into the open void of the pipeline. Void spaces beneath the ground surface can provide a pathway for groundwater flow, which may transport soil particles, creating a cavity in the ground.
Location 2
Based on the observed surface and subsurface conditions at Location 2, it appears the depression in pavement and sidewalk may be the result of ground settlement of highly compressible soil from loads over this area . When subject to increased load over prolonged periods of time, compression from consolidation of weak clays may occur; this is the case of
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Young Bay Mud (YBM) deposits, as observed as encountered in our boring at the site. YBM deposits in the project areas are considered highly compressible, and normal to slightly over-consolidated. This soil may experience settlement when subjected to new loading, such as from placement of new fill, asphalt, or concrete for site improvements. The amount of settlement depends on proposed loads, thickness of Y BM, and previous loads experienced by the Y BM deposits.
RECOMMENDATIONS FOR REPAIRS
Repair Location 1
We discuss three repair alternatives below with varying cost and risk of future settlement from subsidence and soil piping associated with the existing 152-foot segment of abandoned 8 -inch VCP sewer pipe. We summarize the cost and risk impact for each alternative in the table below.
TABLE 1: Repair Location 1 Repair Alternatives Matrix
ALTERNATIVE COST IMPACT RISK RISK
ASSESSMENT
Remove the entire 152-foot
section of pipeline and backfill the
full depth of the excavation with
soil
High
Minimize risk of settlement or
soil piping from the existing
pipeline.
Low
Remove the 15-foot section of
the pipeline at Location 1 and
infill (with slurry) the remainder of
the 152-foot abandoned pipeline
(to the extent possible)
Moderate to
High
Some risk of the remaining
sections of the pipeline
breaking and leading to
potential for future settlement
and soil piping
Moderate
Remove the 15-foot section of
the pipeline at Location 1 and cap
off the end sections of the
abandoned pipeline to remain in
place
Low to
Moderate
Road remains at risk of
damage due to potential for
future settlement and soil
piping from remaining pipeline
sections
Moderate to
high
If not properly abandoned, sections of the pipe outside the Location 1, identified in Exhibit 1, could be compromised and pose a risk of future local settlement or development of additional sink holes as a result of the presence of local void space and cavities within the pipe.
As discussed above, we understand that there may be sections of the pipe that are broken or infilled with soil material, since the televiewer subcontractors were unable to advance their equipment throughout the entire length of the abandoned section. Therefore, attempting to fill the pipe with a high -slump slurry or expansive polymer fill, as discussed i n the alternatives below, may not fully mitigate the risk of subsidence and soil piping. These blockages may obstruct the slurry or expansive polymer from reaching voids on the other side of the blockage.
Repair Location 2
To mitigate further consolidation settlement, w e recommend overexcavation of subgrade soil material underneath the pavement and replacement with lightweight cellular concrete . This minimizes the risk of future settlement associated with consolidation within the YBM deposits.
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RECOMMENDATIONS
Location 1
Repair Alternative 1
We recommend the complete removal of the entire 152 -foot segment of the abandoned 8-inch VCP sewer pipe, and replacement with engineered fill. The excavated area should be backfilled with properly compacted engineered fill per our recommendations in this letter. Where the PG&E line is present in the excavation, backfill the upper section of the trench with material that complies with PG&E Backfill Sand Specification EMS -4123. Following the trench backfill, r eplace the pavement section and impacted curb per the attached City of San Carlos Standard Details.
Repair Alternative 2
If some risk of localized settlement from subsidence and soil piping from the existing abandoned sewer pipeline is acceptable, we recommend removing the section of the pipe in Location 1 as identified in Exhibit 1, as well as slurry-filling the entire 152 -foot segment of abandoned 8 -inch VCP sewer pipe , to the extent possible . For this alternative, w e recommend the following measures.
1. Between 48 and 72 hours prior to the contractor starting work (and/or at the city’s request), we will mark the proposed limits of the excavation , for the pipe removal section, on the pavement. The distressed pavement section is approximately 15 feet in length and 5 feet in width (identified in Exhibit 1 and by the green area in Exhibit 2 below). And the old sanitary sewer (SS) line is approximately 13 feet below ground surface. Once the contractor has removed the pavement, soil, and debris material within the excavation area and to the top of the old SS pipeline, we will identify if the underlying subgrade soil is suitable for placement of new fill. We may make field recommendations, as needed, for mitigation of soft or overly wet subgrade soil.
2. As discussed in the previous bullet point, once we mark the proposed excavation area, the contractor should r emove the distressed pavement section, soil, and debris material to the depth of the pipeline ( approximately 13 feet below ground surface ) within the proposed excavation area.
3. The contractor should remove the section of the abandoned VCP sewer pipe within the proposed excavation limits.
4. The remainder of the existing 152-foot segment of the abandoned 8-inch VCP sewer pipe to be abandoned in-place, outside the excavation limits, should be flushed to clear the pipe of debris and soil material , to the extent possible . As discussed in Step 6, we recommend installing portholes to allow for inspection points to evaluate effectiveness of the flushing. The contractor should discuss with the city on how to properly dispose of the flushing water.
5. Following flushing, the aforementioned remainder of the abandoned 8-inch VCP sewer pipe to be abandoned in-place should be completely backfilled using a high-slump mix of slurry or expansive polymer. The sand cement slurry shall consist of a high slump, non-shrink, 2-sack cement (minimum) mix. Consideration should be given to incorporating water reducers into the mix on site such that there is low viscosity. The design mix should be reviewed and approved by ENGEO prior to its acceptance. A specialty contrac tor should be retained if an expansive polymer is the selected in-fill method.
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6. To evaluate proper backfilling of the abandoned pipeline segment, it will be necessary to install portholes as necessary at the terminus and/or in -line along the grouted segments for confirmation that slurry completely fills the void space within the pipe. The spacing of the inspection points should be determined in the field based on the actual flow of slurry within the pipeline but should be no greater than 20 feet. We recommend installing these portholes prior to Step 4, to evaluate effectiveness of the flushing.
7. Care should be taken regarding grout -pumping pressures and grout viscosity during this backfilling process to avoid over pressurizing and possible uplift or damage to any overlying slab or utility line.
8. The Contractor should contact PG&E to acquire the necessary approval to manage the existing PG&E line prior to excavation.
9. The excavated area should be backfilled with properly compacted engineered fill per our recommendations in this letter. Backfill the upper section of the trench with material that complies with PG&E Backfill Sand Specification EMS-4123.
10. Replace the pavement section and impacted curb per the attached City of San Carlos Standard Details.
Repair Alternative 3
If the risk of localized settlement from subsidence and soil piping from the remaining sections of the pipeline is acceptable, we recommend removing the pipe in Location 1 as identified in Exhibit 1 and capping the ends of the abandoned pipe at each end of the excavation. For this alternative, we recommend the following measures.
1. Complete Steps 1, 2, and 3 as discussed for in Repair Alternative 2.
2. The ends of the abandoned VCP sewer pipe at each end of the excavation should be backfilled to the extent possible using a high slump mix of slurry or expansive polymer as discussed above.
a. Care should be taken regarding grout -pumping pressures and grout viscosity during this backfilling process to avoid over pressurizing and possible uplift or damage to any overlying slab or utility line.
3. The Contractor should contact PG&E to acquire the necessary approval to manage the existing PG&E line prior to excavation.
4. The excavated area should be backfilled with properly compacted engineered fill per our recommendations in this letter. Backfill the upper section of the trench with material that complies with PG&E Backfill Sand Specification EMS-4123.
5. Replace the pavement section and impacted curb per the attached City of San Carlos Standard Details.
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EXHIBIT 2: Repair Location 1
Location 2
To mitigate further consolidation settlement, w e recommend overexcavation of 30 inches of subgrade soil material underneath the pavement and replacement with Class 2 lightweight cellular concrete with a maximum unit weight of 27 pounds per cubic foot to repair the current pavement and sidewalk distress and mitigate further settlement. We provide recommendations for cellular concrete material in a subsequent section.
Between 48 and 72 hours prior to the start of construction activities, we will mark the proposed limits of the excavation on the pavement and sidewalk. The distressed pavement and sidewalk area is approximately 30 feet in length by 15 feet in width, as approximately identified in Exhibit 1 and by the green area in Exhibit 3 below. A portion of the repair area overlies an existing PG&E line and lightbox. The Contractor should contact PG&E to acquire the necessary approval to manage the existing PG&E line prior to excavation.
Once the contractor has removed the pavement, sidewalk, soil, and debris material within the proposed excavation area and depth, we will identify if the underlying subgrade soil is suitable for placement of lightweight cellular concrete fill. We may make field recommendations, as needed, for mitigation of soft or overly wet subgrade soil. Following the cellular concrete placement, replace the pavement section and sidewalk in accordance with the City of San Carlos Standard Specifications.
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EXHIBIT 3: Repair Location 2
SANITARY SEWER REPLACEMENT
We understand a 13-foot-deep, 30-foot segment of an 8-inch sanitary sewer line will be replaced as part of the repair project scope, the section of line to be repaired is shown in Exhibit 1 and in the underground utilities plan provided by you in Figure 3 (from manhole BY/01 to manhole MT/01). Backfill should be placed in accordance with our compaction recommendations below , as well as the City of San Carlos standard trench backfill detail as shown in the attached details.
TEMPORARY SHORING AND DEWATERING
Temporary Shoring
The Contractor should be familiar with applicable local, state, and federal regulations, including the current Occupational Safety and Health Administration (OSHA) Excavation and Trench Safety Standards. It is the responsibility of the Contractor to provide stable, safe trench, and construction slope conditions and to follow OSHA safety requirements. Since excavation procedures may be dangerous, it is also the responsibility of the Contractor to provide a trained “competent person” as defined by OSHA to supervise all excavation operations, ensure that all personnel are working in safe conditions, and have thorough know ledge of OSHA excavation safety requirements.
Generally, the soils within the planned depth of excavation are Type C Soils.
To minimize the impact on the existing road and nearby utilities, we anticipate continuous shoring up to 15 feet of vertical cut may be required. We should be retained to review the shoring plans and calculations.
However, the contractor should be prepared to bench the excavation per OSHA safety requirements if adequate shoring for a 15-foot vertical cut is not feasible.
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Temporary Dewatering
Based on experience with nearby sites, we anticipate groundwater may be as shallow as 7 feet below ground surface (bgs). During our exploration we encountered groundwater between 10 and 12 feet below ground surface, however this may be artificially deep due to the time of observation.
We expect the groundwater elevation to be closer to the top of the YBM.
Some dewatering measures may be necessary to manage water entering excavations for conditions including (1) elevated groundwater levels in response to very heavy to extreme rainfall periods and (2) transient groundwater flowing through coarse grained deposits from local infiltrating rainfall, irrigation water, etc. Where these conditions exist, some form of dewatering should be considered to maintain a relatively dry stable work environment and a firm subgrade.
We anticipate that any required dewatering can be achieved locally by implementing a system of sumps and pumps within the excavation. Regional dewatering can cause accelerated settlement within the YBM deposits. If the contractor anticipates regional dewatering is necessary, we should be retained to evaluate the dewatering plan and estimate resulting settlement.
EARTHWORK RECOMMENDATIONS
Acceptable Fill Recommendations
On-site soil material is anticipated to be suitable as fill material provided it is processed to remove concentrations of organic material, debris, and particles greater than 6 inches in maximum dimension. Young Bay Mud, peat, or fat clay excavated during construction should not be reused as engineered fill due to the high expansion potential. An evaluation of the quality of the fill shall be conducted by a representative of our firm during construction.
Slurry shall consist of a high slump mix of water and cement for flowability and have a minimum concrete strength of 100 psi.
Cellular concrete is a form of lightweight fill that is created by adding liquid foam into a mix of cement and water. The resulting material is a durable, lightweight material that can be produced with a predictable density . We recommend a cellular concrete mix with a maximum density of 27 pcf and minimum 28-day compressive strength of 40 psi.
Compaction Recommendations
After removing the existing fill, organics, or loose soil, the contractor should scarify to a depth of at least 12 inches, moisture condition, and compact the subgrade in accordance with the table below. The loose lift thickness should not exceed 8 inches or the depth of penetration of the compaction equipment used, whichever is less.
TABLE 2: Fill Placement Requirements
FILL LOCATION MATERIALS
MINIMUM
RELATIVE
COMPACTION
(%)
MINIMUM
MOISTURE CONTENT
(PERCENTAGE
POINTS ABOVE
OPTIMUM)
General Fill
Expansive Soil (30 > PI ≥15) 87-92 4
Low-Expansive Soil
or Import (PI <15) 90 1
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City of San Carlos, Public Works Department 13387.000.036 Monte Vista Drive May 5, 2025
RECOMMENDATIONS FOR PROPOSED REPAIRS AND IMPROVEMENTS Page 12
FILL LOCATION MATERIALS
MINIMUM
RELATIVE
COMPACTION
(%)
MINIMUM
MOISTURE CONTENT
(PERCENTAGE
POINTS ABOVE
OPTIMUM)
Pavement Subgrade* Low-Expansive Soil
or Import (PI <15) 95 1
Sidewalk Subgrade Low-Expansive Soil
or Import (PI <15) 90 1
Pavement and
Sidewalk Aggregate
Base
Class 2 Aggregate Base 95 0
*Upper 12 inches of subgrade
Relative compaction refers to the in -place dry density of soil expressed as a percentage of the maximum dry density of the same material.
CLOSING
This letter presents geotechnical recommendations for the construction of the repairs discussed above. The conclusions and recommendations contained in this report are solely professional opinions. We strive to perform our professional services in accordance with generally accepted principles and practices currently employed in the area; there is no warranty, express or implied.
There are risks of earth movement and property damage inherent in building on or with earth materials. We are unable to eliminate all risks; therefore, we are unable to guarantee or warrant the results of our services.
ENGEO's liability for damage due to professional negligence, acts, errors, omissions, breach of contract and consequential damages will be limited by Client to an amount not to exceed an aggregate limit of $100,000 or ENGEO’s fee, whichever is greater, regardless of the legal theory under which such liability is imposed.
If you have any questions or comments regarding this letter, please call and we will be glad to discuss them with you.
Sincerely,
ENGEO Incorporated
Lydia Kelley, PE Theodore P. Bayham, GE, CEG
Yanet Zepeda, GE
lk/yz/rhb/cb
Attachments: Figure 1 – Vicinity Map
Figure 2 – Site Plan
Figure 3 – San Carlos Underground Utility Plan
San Carlos Standard Details
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Project Site
EXPLANATION──────────────────────────────
FIGURE NO.
CHECKED BY:DRAWN BY:
PROJECT NO. :
COPYRIGHT @ 2025 BY ENGEO INCORPORATED. THIS DOCUMENT MAY NOT BE REPRODUCED IN WHOLE OR IN PART BY ANY MEANS WHATSOEVER, NOR MAY IT BE QUOTED WITHOUT THE EXPRESS WRITTEN CONSENT OF ENGEO INCORPORATED.
ORIGINAL FIGURE PRINTED IN COLOR
AS SHOWNSCALE:
NO SCALE
BASEMAP SOURCE: ENGEO INC, ESRI WORLD TOPO MAP
2,0001,0000
FEET
SITE
1 RHBYZSAN CARLOS, CALIFORNIA
13387.000.036
MONTE VISTA DRIVE
VICINITY MAP
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Fairfield Inn &
Suites
Skyway
Rd MonteVistaDr
MonteVistaDr
Hiller Aviation
Museum
1-B1
1-B2
1-B3
LB-15
C-1-17
C-1-16
EXPLANATION────────────────────────────
Project Site
Boring (ENGEO, 2025)
Boring (Cal Engineering & Geology, 2010)
Cone Penetration Test (Fugro, 2010)
AS SHOWNSCALE:
COPYRIGHT @ 2025 BY ENGEO INCORPORATED. THIS DOCUMENT MAY NOT BE REPRODUCED IN WHOLE OR IN PART BY ANY MEANS WHATSOEVER, NOR MAY IT BE QUOTED WITHOUT THE EXPRESS WRITTEN CONSENT OF ENGEO INCORPORATED.
ORIGINAL FIGURE PRINTED IN COLOR
ALL LOCATIONS ARE APPROXIMATE
FIGURE NO.
CHECKED BY:DRAWN BY:
PROJECT NO. :
50250
FEET
2 BASEMAP SOURCE: ESRI MAPPING SERVICE 2022
SAN CARLOS, CALIFORNIA
13387.000.036
MONTE VISTA DRIVE
SITE PLAN
RHBYZ
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CITY OF SAN CARLOS, CALIFORNIA STANDARD DETAIL
TYPICAL STREET SECTIONS
The City of Good
Living
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The City of Good
Living
CITY OF SAN CARLOS, CALIFORNIA STANDARD DETAIL
STANDARD CURB & GUTTER
A.C. BERMS & SIDEWALK 6
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The City of Good
Living
CITY OF SAN CARLOS, CALIFORNIA STANDARD DETAIL
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CITY COUNCIL
STAFF REPORT
MEETING DATE: August 11, 2025
ITEM TITLE: Adopt a Resolution Approving the Specifications for the 2025 Annual Sidewalk Replacement Project (C9465) and Authorizing a Call for Bids.
RECOMMENDATION:
Staff recommend that the City Council adopt a Resolution approving the 2025 Annual Sidewalk Replacement Project (C9465) (“Project”) specifications and authorizing a call for bids.
FISCAL IMPLICATIONS:
There are no fiscal impacts, and no additional funding is needed at this time.
Funding for the Project comes from C9465 which has an available Project budget of $300,000 for fiscal year 2025-26. Should additional appropriation be needed, staff will request it at the time the Project is awarded.
BACKGROUND:
The Sidewalk Maintenance Program (“Program”) is administered by the City to eliminate tripping hazards and offsets within a pedestrian’s path of travel along the sidewalk area of the property owner’s frontage.
The City’s Municipal Code Section 12.04 and Chapter 22 of the California Streets and Highways Code assigns responsibility for the maintenance and repair of the sidewalk adjacent to a property’s frontage to the property owner. To defray the financial burden of sidewalk repair, the City implemented the Program, through which the cost of repair is shared evenly between the City and the property owner.
To improve efficiency, staff group together properties in need of similar repairs and bid the work out to a single qualified contractor, ensuring competitive pricing and greater compliance with state and City codes. Participating property owners do not have to apply for or pay the administrative costs of permits; the City absorbs administrative costs as a courtesy to the property owner.
ANALYSIS:
The City Engineer signed the final bid set of the specifications on July 29, 2025. The tentative bid opening date is September 2, 2025, at 10:00 a.m., with the Project tentatively scheduled to be awarded at the September 22, 2025 City Council meeting.
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Staff recommend approving the specifications and authorizing a call for bids for the Project.
ALTERNATIVES:
The alternatives available to the City Council include:
1. Adopt a Resolution approving the 2025 Annual Sidewalk Replacement Project (C9465) specifications and authorizing a call for bids; or
2. Do not adopt the Resolution; or
3. Provide staff with alternative direction.
Respectfully submitted by:
Steven Machida, Public Works Director
Approved for submission by:
____________________________
Nil Blackburn, Acting City Manager
ATTACHMENT(S):
1. Resolution
2. 2025 Annual Sidewalk Replacement Project (C9465) Specifications
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RESOLUTION NO. 2025 – ____
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF SAN CARLOS APPROVING SPECIFICATIONS FOR THE 2025 ANNUAL SIDEWALK REPLACEMENT PROJECT (C9465) AND AUTHORIZING A CALL FOR BIDS.
WHEREAS, the Sidewalk Maintenance Program (“Program”) is administered by the City to eliminate tripping hazards and offsets within a pedestrian’s path of travel along the sidewalk area of the property owner’s frontage; and
WHEREAS, the City’s Municipal Code Section 12.04 and Chapter 22 of the California Streets and Highways Code assigns responsibility for the maintenance and repair of the sidewalk adjacent to a property’s frontage to the property owner; and WHEREAS, to defray the financial burden of sidewalk repair, the City implemented the Program, through which the cost of repair is shared evenly between the City and the property owner; and
WHEREAS, staff finds it most efficient to group together properties in need of similar repairs and bid the work out to a single-qualified contractor, ensuring competitive pricing and greater compliance with state and City codes; and
WHEREAS, participating property owners do not have to apply for or pay the administrative costs of permits as the City absorbs these administrative costs as a courtesy; and WHEREAS, the City Engineer signed the final bid set of the specifications for the 2025 Annual Sidewalk Replacement Project (C9465) on July 29, 2025.
NOW, THEREFORE BE IT RESOLVED, that the San Carlos City Council approves the 2025 Annual Sidewalk Replacement Project (C9465) specifications and authorizes a call for bids. * * * * *
I, City Clerk Crystal Mui, hereby certify that the foregoing Resolution was duly and regularly passed and adopted by the City Council of the City of San Carlos at a scheduled meeting thereof held on the 11th day of August 2025, by the following vote:
________________________________
CITY CLERK of the City of San Carlos
APPROVED:
___________________________
MAYOR of the City of San Carlos
AYES, COUNCILMEMBERS:
NOES, COUNCILMEMBERS:
ABSENT, COUNCILMEMBERS:
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CITY OF SAN CARLOS
SAN MATEO COUNTY, CALIFORNIA
Public Works Department
600 Elm Street
San Carlos, CA 94070
Contract Documents
For the
2025 Annual Sidewalk Replacement
Project
City Project No. C9465
BID OPENING: SEPTEMBER 2, 2025, AT 10:00 A.M.
BID SET
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2025 Annual Sidewalk Replacement Project
City Project No. C9465
DESIGN CERTIFICATION
The Technical Specifications contained herein have been prepared by, or under the responsible charge of, the following registered person(s):
Prepared by:
ALEX TAT, P.E., PRINCIPAL ENGINEER Date
Public Works Department
City of San Carlos
600 Elm Street, San Carlos, CA 94070
(650) 802-4193
Approved for Construction:
GRACE LE, P.E., CITY ENGINEER Date
Public Works Department
City of San Carlos
600 Elm Street, San Carlos, CA 94070
(650) 802-4200
7/29/2025
7/29/2025
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TABLE OF CONTENTS
A. INTRODUCTORY PAGES
Title Page No.
Cover Page i
Design Certifications ii
Table of Contents iii
Notice Inviting Sealed Proposals v
Instructions to Bidders vii
Schedule of Required Bid Documents and Agreement Forms ix B. BID PROPOSAL
Bid Proposal Cover Page P-1
Bid Proposal Table of Contents P-2
Bid Proposal P-3
Bidding Requirements P-4
Bid Schedule P-6
Designation of Subcontractors P-8
City Business License Requirement P-8
Certifications and Affidavits
Non-Collusion Affidavit P-9
Bidders Qualifications P-10
Bidders References P-11
Signature Pages P-12
Bidders Bond P-14
C. AGREEMENT AND AGREEMENT FORMS
Agreement and Agreement Forms Table of Contents A-1
Construction Agreement A-2
Exhibit B Insurance Coverage Form A-10
Resolution of Construction Claims A-11
Agreement Forms
Payment Bond A-13
Performance Bond A-15
Workers Compensation Certification A-17
Certification of Safety Requirements for Contractors and Vendors A-18 Drug-Free Workplace Certification A-19
Escrow Agreement for Security Deposits in Lieu of Retention (Optional) A-20 D. GENERAL PROVISIONS
Section 1 Terms and Definitions GP-1
Section 2 Proposal Requirements and Conditions GP-5
Section 3 Review of Bids, Contract Award and Execution GP-8 Section 4 Scope and Control of the Work GP-13
Section 5 Changes of Work GP-20
Section 6 Control of Materials GP-24
Section 7 Utilities GP-27
Section 8 Prosecution and Progress GP-30
Section 9 Responsibilities of the Contractor GP-39
Section 10 Measurement and Payment GP-54
Section 11 Guarantee GP-60
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E. BID ITEM DESCRIPTIONS
F. TECHNICAL SPECIFICATIONS
Section 1 Summary of Work TS-1
Section 2 Miscellaneous TS-3
Section 3 Traffic and Pedestrian Control and Safety TS-7 Section 4 Site Maintenance and Cleaning TS-8
Section 5 Concrete Reconstruction Materials TS-9
G. APPENICIES
Appendix A City Standard Details
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If you require translation for this notice, please contact the City Clerk’s Office at 650-802-4222.
CITY OF SAN CARLOS
SAN MATEO COUNTY, CALIFORNIA
NOTICE INVITING SEALED PROPOSALS
NOTICE IS HEREBY GIVEN that sealed proposals or bids for the 2025 Annual Sidewalk Replacement Project, No.
C9465 shall be publicly opened, examined and announced on Tuesday, September 2, 2025, at 10:00 a.m. at the San Carlos City Clerk’s Office at City Hall - 600 Elm Street, San Carlos, CA 94070. Sealed bid proposals shall be received in-hand by the City Clerk before that bid opening date and time. No Pre-Bid meeting has been scheduled for this project.
A Class A or C -8, Contractor’s License is required for this work. Work will be done and payments will be made in accordance with provisions described in the specifications.
The scope of work generally includes the following but is not limited to, furnishing all labor, materials, equipment, and services necessary or required to perform and construct, complete in place and in satisfactory condition, remove and replace sidewalk, remove and replace driveway, root pruning, curb & gutter and all related items as shown on the specifications and specified herein and as directed by Project Manager in the field. Removal and replacement of concrete sidewalk, driveways, curb and gutter shall be in accordance with Appendix A.
Bids are required for the entire work described herein in accordance with the instructions to bidders. The term of the contract shall be for one year or until the contract budget is exhausted whichever comes first from the award date.
Bids must be accompanied by a Proposal guarantee amounting to ten (10%) percent of the bid as described in the specifications. Said guarantee shall be forfeited to the City in case the bidder depositing the same does not, within fifteen days after written notice that the contract has been awarded to him/her (1) enter into a contract with the City and (2) furnish Performance and Payment Bonds as described in the specifications.
The City Council reserves the privilege of rejecting any and all proposals or to waive any irregularities or informalities in any proposals or in the bidding. No bidder may withdraw his/her proposal for a period of ninety (90) calendar days after the date set for opening of proposals.
As a “Public Works” project and pursuant to Section 1773 of the Labor Code, the general prevailing wage rates for San Mateo County shall apply to this contract, as determined by the Director of the California Department of Industrial Relations.
Specifications, forms of proposals, bonds and contracts may be inspected or obtained from ARC Document Solutions at 829 Cherry Lane, San Carlos, CA 94070, (650) 631 -2310; email at sancarlos@e -arc.com; or visit the City of San Carlos Website at www.cityofsancarlos.org. Bidders must register with ARC Document Solutions to obtain further information.
Bidders are directed to the Instructions for Bidders for additional contract requirements.
Crystal Mui, City Clerk
Published: August 14 and 21, 2025
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CITY OF SAN CARLOS
SAN MATEO COUNTY, CALIFORNIA
INSTRUCTIONS TO BIDDERS
1. Proposal Requirements: Bidder's attention is directed to the General Provisions of these Specifications for the requirements and conditions which must be adhered to in the preparation of the proposal form and submission of this proposal.
2. Receipt of Bids and Bid Opening: Proposals shall be received at the office of the City Clerk, 600 Elm Street, San Carlos, CA 94070, not later than the bid deadline described in the Notice Inviting Sealed Proposals. Proposals shall be submitted in a sealed envelope, plainly marked on the outside 2025 Annual Sidewalk Replacement Project, Project No. C9465
3. Time of Completion and Liquidated Damages: The term of the contract shall be for one year or until the contract budget is exhausted whichever comes first from the award date. If the Contractor fails to complete the work within the time limit specified in each individual task order, the Contractor shall pay liquidated damages to the City, computed at the rate of Five Hundred Dollars ($500) for each calendar day beyond the specified time limit until the project is completed.
4. Bid Security: Pursuant to California Public Contract Code Section 20170, each proposal shall be accompanied by a bid security in the form of cash, cashiers or certified check, or bidders bond made payable to the City of San Carlos for an amount equal to at least ten percent (10%) of the Bid Amount and no bid shall be considered unless such security is enclosed therewith.
5. Bid Guarantee: No bid shall be withdrawn except as provided for pursuant to Public Contract Code Section 5103, and the bidder shall guarantee the Total Bid Price for a period of ninety (90) calendar days from the date of the bid opening.
6. Contractors License: Bidders are to be licensed in accordance with the provisions of the Contractors License Law, Chapter 9 of Division 3 of the State Business and Professions Code. In addition, at the time of submitting the bid, bidder must have the following classification of contractors license: Class A or C-8, Contractors License.
7. Prevailing Wage: The work contemplated by this contract is a public work subject to prevailing wages under California Labor Code Section 1770 et. seq. The successful bidder will be required to pay not less than the prevailing rate of per diem wages as determined by the California Department of Industrial Relations or Federal Minimum Wage Rates as determined by the United States Secretary of Labor in effect on the date the work is performed.
8. Bonds and Insurance: All contractors are required to furnish to the City faithful performance, labor and materials, and 2-year warranty bonds and insurance, as required in the specifications.
9. Security Substitution: Pursuant to California Public Contract Code Section 22300, and at the request and expense of the Contractor to whom the Contract is awarded, securities of a value equivalent to the retention amount, in a form approved by the City, shall be permitted in substitution for money withheld by the City to ensure performance under the Contract.
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10. Pre-Bid Conference: No pre-bid conference has been scheduled for this project.
11. Requests for Clarification and Project Communication: In the event the bidder has any questions as to the meaning of any part of the specifications, or if the bidder finds any error, inconsistency, or ambiguity in the Contract Documents, the bidder shall make a written request for clarification prior to submitting its bid. All questions and comments regarding the specifications should be directed to the Project Manager indicated below and will only be responded to if received in writing at least five (5) working days before the bid opening. Questions received after this time and date may not be addressed.
City of San Carlos Public Works Department
600 Elm Street, San Carlos, CA 94070
Attention: Evan Cai, Associate Engineer
[email protected]
Telephone: (650) 802-4196
Fax: (650) 595-6704
12. These Instructions to Bidders are hereby made a part of the Contract Documents.
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ix
SCHEDULE OF REQUIRED
BID DOCUMENTS AND AGREEMENT FORMS
Submit with Bid Proposal - The following documents must be completed, signed and submitted as part of the Bid Proposal, prior to the bid opening:
Completed Bid Proposal consisting of:
A. Bid Schedule
B. Designation of Subcontractors
C. Certifications and Affidavits:
1. Non-Collusion Affidavit
2. Bidders Qualifications
3. Bidders References
4. Bidders Personnel
D. Signature Pages
E. Bid Guarantee (Bid Bond attached)
F. Addendum, if any (not attached) signature page to be signed and submitted by bidder.
Submit Prior to Notice to Proceed -The following documents must be completed, signed and submitted after approval and award of the Contract, prior to the Notice to Proceed:
A. Agreement
B. Payment Bond
C. Performance Bond
D. Insurance Endorsements
1. General Liability
2. Automobile Liability
3. Workers Compensation
E. Certifications
1. Workers Compensation
2. Safety Requirements for Contractors and Vendors
3. Drug-Free Workplace
Submit Prior to Final Acceptance - The following documents must be completed, signed and submitted prior to final acceptance:
A. Guarantee
B. Stop Notice Releases, if any (form not included)
C. Record Drawings, if any
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-1 Project No. C9465
CITY OF SAN CARLOS
PUBLIC WORKS DEPARTMENT
600 Elm Street
San Carlos, CA 94070
BID PROPOSAL
FOR:
2025 Annual Sidewalk Replacement Project
City Project No. C9465
IN
CITY OF SAN CARLOS, COUNTY OF SAN MATEO
STATE OF CALIFORNIA
NOTE: All portions of all pages included within this section, and acknowledgement of receipt of any issued addenda must be properly completed, signed, and submitted with the bid. Failure to do so may result in the bid being deemed non-responsive by the City.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-2 Project No. C9465
BID PROPOSAL
TABLE OF CONTENTS
Bid Proposal Cover Page...................................................................................... P-1 Bid Proposal Table of Contents ............................................................................ P-2 BID PROPOSAL PAGES TO BE SUBMITTED WITH BID:
Bid Proposal.......................................................................................................... P-3 Bidding Requirements........................................................................................... P-4 Bid Schedule......................................................................................................... P-6 Designation of Subcontractors.............................................................................. P-8 City Business License Requirement ..................................................................... P-8 Certifications and Affidavits
Non-Collusion Affidavit ................................................................................... P-9 Bidders Qualifications..................................................................................... P-10 Bidders References........................................................................................ P-11 Signature Pages.................................................................................................... P-12 Bid Bond ............................................................................................................... P-14
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-3 Project No. C9465
BID PROPOSAL
2025 Annual Sidewalk Replacement Project
City Project No. C9465
Bid To: Honorable Mayor and City Council
City of San Carlos, City Hall
San Carlos, CA 94070
Bid From:
Bidders Company Name:
Contact Person:
Business Street Address:
City, State, Zip Code:
Phone No.: ( )
E-mail:
Contractor License No.:
Contractor License Expiration Date:
Dear Mayor and Members of the City Council:
I, as bidder, declare that I have satisfied myself as to the actual conditions and requirements of the work by careful examination of the location of the proposed work, by examination of the specifications including the Instructions to Bidders, and by other measures, and that after submission of the bid, I will not dispute, complain or assert that there was any misunderstanding in regards to the nature or amount of work to be done.
I hereby certify that only those parties interested in this proposal as principals are named in this proposal and that this bid is genuine, and not sham, collusion, or made in the interest or in behalf of any person not named. I have not directly or indirectly induced or solicited any other bidder, person, firm or corporation to put in a sham bid, or refrain from bidding, and have not in any manner sought by collusion to secure for myself an advantage over any other bidder.
I agree that if this proposal is accepted, I will contract with the City of San Carlos in the form of agreement proposed, will provide all bonds and insurance certificates as required by the agreement and will furnish all equipment and materials and perform all the labor required to complete the work in accordance with the specifications and other contract documents, for the unit or lump sum prices set forth in the Bid Schedule.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-4 Project No. C9465
I have carefully checked all of the figures in the Bid Schedule and understand that the City shall not be responsible for any errors or omissions on my part in making up this bid. I agree that this bid may not be withdrawn for a period of ninety (90) calendar days from the date of the bid opening and that the City reserves the right to reject any or all nonconforming, nonresponsive, or conditional bids, waive any irregularities in bids received, and may at its option make the award that in the judgment of the City is to the best interest of the City.
BIDDING REQUIREMENTS
The work to be done and referred to here is in the City of San Carlos, County of San Mateo, State of California, and shall be constructed in accordance with all provisions of the project specifications including: any addenda; the Instructions to Bidders, the Agreement; the Standard Specifications and Standard Plans of the California Department of Transportation, current edition; the Labor Surcharge and Equipment Rental Rates; and payment of not less than the higher of the prevailing rate of per diem wages as determined by the Director of the California Department of Industrial Relations or Federal minimum wage rate as predetermined by the United States Secretary of Labor in effect on the date the work is performed.
For each of the various contract items of work designated on the Bid Schedule, the bidder shall set forth a unit or lump sum price which the bidder shall then use to calculate and designate a total cost for each item of work based upon the designated estimate of the quantities of work to be done, all in clearly legible figures in the respective spaces of the Bid Schedule provided for this purpose.
The bidder shall include in the unit or lump sum prices paid for the various contract items of work full compensation for conforming to the requirements of the Contract Documents and for completing all of the work required. No additional compensation shall be granted for any additional items unless categorized and approved as extra work under the terms of the agreement.
The estimate of construction quantities set forth in the Bid Schedule is approximate only, being given only as a basis for the comparison of bids, and the City does not expressly or by implication agree that the actual amount of work will correspond with those estimated quantities.
The City reserves the right to increase the amount of any class or portion of the work or to omit portions of the work as may be deemed necessary or expedient by the Engineer without claim for damage or loss of anticipated profit, and that payment will only be made on the basis of actual quantities of work performed.
If the City accepts this proposal and the bidder fails to enter into the contract and/or fails to furnish bonds as required by the specifications with sureties satisfactory to the City within ten (10) calendar days after the bidder has received notice from the City that the contract has been awarded, the City may, at its option, determine that the bidder has breached and abandoned the contract, and thereupon, the bid security accompanying this proposal shall be forfeited and become the property of the City.
The Notice to Proceed will not be issued until after the contract has been fully executed. The contractor shall commence the work under the contract within ten (10) days following the date of the Notice to Proceed, or as otherwise specified in the project specifications or negotiated with the City, and shall diligently prosecute the project to completion within the time specified. The contract completion period is inclusive of the time needed for material delivery.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-5 Project No. C9465
Bidder shall comply with the requirements of the California Labor Code, including sections 1770 et seq. , and pay not less than the prevailing rate of per diem wages as determined by the Director of the California Department of Industrial Relations. Copies of such prevailing rate of per diem wages are on file at the office of the City Engineer, which copies shall be made available to any interested party upon request. The Contractor shall post a copy of such determination at the job site.
As required by Section 6705 of the California Labor Code and in addition thereto, for any excavation of any trench or trenches five feet (5) or more in depth, the Contractor shall submit to the Engineer for acceptance, a detailed plan showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of such trench or trenches. Structural calculations prepared, stamped and signed by a Registered Engineer licensed to practice in the State of California shall accompany the plan to verify the structural safety and adequacy of the sheeting, shoring and bracing to be used on the project. No such plan shall allow any shoring, sloping or a protection system less effective than that required by the Construction Safety Orders of the State Division of Occupational Safety and Health.
In accordance with the provisions of Section 1860 of the Labor Code, prior to performing work on the Contract, each Contractor to whom a public works contract is awarded shall sign and file with the City the Workers Compensation Certification included in the Agreement and Agreement Forms section of these specifications.
Bidders attention is directed to Section 2 of the General Provisions for additional information and requirements pertaining to the submission of a bid, and which is incorporated here by reference.
Any protest of the proposed contract award must be submitted in writing to the City no later than 5:00 p.m. on the fifth business day following the date of the bid opening. Bidder is directed to the Bid Protest Procedure Section of the General Provisions for additional information.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-6 Project No. C9465
BID SCHEDULE
Bids are to be submitted for the entire work. All applicable sales taxes, state and/or federal, and any other special taxes, patent rights or royalties are included in the prices quoted in the bid.
In the case of a discrepancy between the product of the Estimated Quantity and the Unit Price with the Item Total, the product of the Estimated Quantity and the Unit Price shall prevail and the figure shown as the Item Total shall be adjusted accordingly, except as provided in cases involving (a) or (b) below:
(a) If the amount set forth as a unit price is unreadable or otherwise unclear, or is omitted, then the amount set forth in the item total column for the item shall prevail and shall be divided by the estimated quantity for the item and the price thus obtained shall be the unit price;
(b) (Decimal Errors) If the product of the entered unit price and the estimated quantity is exactly off by a factor of ten, one hundred, etc., or one-tenth, or one-hundredth, etc. from the item total, the discrepancy will be resolved by using the entered unit price or item total, whichever most closely approximates percentage-wise the unit price or item total in the Engineers Estimate.
If both the unit price and the item total are unreadable or otherwise unclear, or are omitted, the bid may be deemed irregular. Likewise, if the item total for a lump sum item is unreadable or otherwise unclear, or is omitted, the bid may be deemed irregular unless the project being bid has only a single item and a clear, readable total bid is provided.
In the case of a discrepancy between the sum of the figures in the item total column (adjusted per the previous paragraphs, if necessary) and the amount set forth as the total base bid amount, the sum of the figures in the item total column shall prevail and the amount shown as the total base bid amount shall be adjusted accordingly.
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Page P-7 Project No. C9465
BASE BID ITEMS ARE AS FOLLOWS:
"2025 Annual Sidewalk Replacement Project
City Project No. C9564
Item
No. Item Description Unit of
Measure
Estimated
Quantity Unit Price Bid Price
1 Remove and Replace Concrete
Sidewalk
SF 2,500
2 Remove and Replace Concrete
Driveway Approach
SF 1,200
3 Remove and Replace Concrete
Curb and Gutter
LF 200
4 Remove and Replace Concrete
Curb Only (No Gutter Pan)
LF 50
TOTAL BASE BID:
Notes:
1. The Contract will be compared and awarded on the basis of the Base Bid Amount.
2. All items on the Base Bid Schedule must be bid. Partial bids will not be accepted.
3. The City reserves the right to reject all bids for any reason whatsoever.
4. Issuance of the Notice to Proceed will constitute the beginning of the Contract.
5. The term of the contract shall be for one year or until the contract budget is exhausted whichever comes first from the award date.
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Page P-8 Project No. C9465
DESIGNATION OF SUBCONTRACTORS
The Contractor shall perform work equaling at least thirty percent (30%) of the value of the original total bid with the Contractors own employees and equipment, owned or rented, with or without operators.
In accordance with the Subletting and Subcontracting Fair Practices Act, Public Contract Code sections 4100 et seq . (the Subcontracting Act), the Bidder hereby certifies and submits, as required by law, the following concerning subcontractors:
1. The portion of the work, which will be done by each such subcontractor; and
2. The name and location of the place of business of each subcontractor who will perform work or labor, fabricate a portion of the work or improvement according to the project specifications, or render service to the Contractor in or about the construction of the work in an amount in excess of one-half of one percent (0.5%) of the Contractors total bid.
Portion of Work to be
Performed by Subcontractor
Subcontractor Name,
Address and License Number
(License No. Required under AB 44)
1. 2.
3. 4.
5. 6.
7. (For additional Subcontractors, attach copies of this sheet as necessary) NOTE: T HIS CERTIFICATE MUST BE COMPLETED AND RETURNED ALONG WITH THE CONTRACTORS BID PROPOSAL.
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CITY BUSINESS LICENSE REQUIREMENT
NOTE: It is understood and agreed that the bidder and all subcontractors will obtain a City of San Carlos Business License before beginning any work.
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NON-COLLUSION AFFIDAVIT
Title 23 United States Code Section 112 and
Public Contract Code Section 7106
State of California )
) ss.
County of _______________ )
(name of person signing affidavit), being first duly
sworn, deposes and says under penalty of perjury under the laws of the State of California, that he or she has the right, power, legal capacity, and authority to execute this Affidavit as (sole owner, partner, president, secretary, etc) of
(legal name of Bidder), the Bidder, that the
Bid is not made in the interest of, or on behalf of, any undisclosed person, partnership, company, association, organization, or corporation; that the Bid is genuine and not collusive or sham; that the Bidder has not directly or indirectly induced or solicited any other Bidder to put in any false or sham Bid, and has not directly or indirectly colluded, conspired, connived, or agreed with any Bidder or anyone else to put in a sham Bid, or that anyone shall refrain from Bidding; that the Bidder has not in any manner, directly or indirectly, sought by agreement, communication, or conference with anyone to fix the Bid price of the Bidder or any other Bidder, or to fix any overhead, profit, or cost element of the Bid price, or of that of any other Bidder, or to secure any advantage against the public body awarding the Contract or anyone interested in the proposed Contract; that all statements contained in the Bid are true; and, further, that the Bidder has not, directly or indirectly, submitted his Bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid, and will not pay, any fee to any corporation, partnership, company association, organization, Bid depository, or to any member or agent thereof to effectuate a collusive or sham Bid.
IN WITNESS WHEREOF, the undersigned, as bidder, represent and warrant that they have the right, power, legal capacity, and authority to enter into and execute this document on behalf of the Bidder, and have executed this document by setting hereto their names, titles and signature. (Signature of Representative of Bidder)
Subscribed and sworn to before me, a Notary Public in and for the State of California, County of _____________________, this ______ day of _________________, 20____.
Signature of Notary Public:________________________
My Commission expires __________________, 20_____ (Seal) NOTE: T HIS AFFIDAVIT MUST BE COMPLETED AND RETURNED AS PART OF THE CONTRACTORS BID PROPOSAL.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-11 Project No. C9465
BIDDERS QUALIFICATIONS
The following statements as to the financial qualifications and experience of the Bidder are submitted as a part of this Bid and the Bidder guarantees the truthfulness and accuracy of the information. Pursuant to Public Contract Code 10165, financial statements and experience questionnaires are not public records and are not open to public inspection.
Financial Data
Reference is hereby made to the following bank or banks as to the financial responsibility of the bidder.
NAME OF BANK ADDRESS
Experience Data
The Bidder has been engaged in the contracting business, under the present business name for ________ years. Experience in work of a nature similar to that covered in this Bid extends over a period of __________ years.
The Bidder as a Contractor has never failed to satisfactorily complete a contract awarded to him, except as follows: (Name all exceptions and reasons therefore):
Bidders Personnel
The following is a list of key personnel including an listing of the persons knowledge, ability or trade along with a brief description of their experience. If Bidder is awarded the Contract, it is understood that the work will be directed and actively supervised by one of these persons.
List of Personnel Knowledge/Skills Experience
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BIDDERS REFERENCE
Bidders must be specialized in concrete construction closely related to sidewalk, driveway approach, curb and gutter removal and replacement. Bidders, by its own work forces, shall have successfully completed three (3) sidewalk repair projects totaling a minimum of Two Hundred Thousand Dollars ($200,000) for each project within the last four (4) years.
Provide a contact person and description of the project, or other such information that will demonstrate the ability to vigorously prosecute the work.
1. PROJECT NAME LOCATION YEAR COMPLETED
AGENCY CONTACT PERSON TELEPHONE NO. FINAL CONSTRUCTION COST
BRIEF DESCRIPTION OF THE WORK AND/OR MANNER OF EXECUTION
2. PROJECT NAME LOCATION YEAR COMPLETED
AGENCY CONTACT PERSON TELEPHONE NO. FINAL CONSTRUCTION COST
BRIEF DESCRIPTION OF THE WORK AND/OR MANNER OF EXECUTION
3. PROJECT NAME LOCATION YEAR COMPLETED
AGENCY CONTACT PERSON TELEPHONE NO. FINAL CONSTRUCTION COST
BRIEF DESCRIPTION OF THE WORK AND/OR MANNER OF EXECUTION
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SIGNATURE PAGES
The terms and conditions of the final contract when executed shall control and supersede anything herein to the contrary or inconsistent with such contract.
The bidder states that he has inspected the site of the propose work in order to satisfy himself, by personal examination, or by such other means as he prefers, of the location of the proposed work and as to the actual conditions of and at the work site. The bidder hereby offers to furnish all labor, materials, equipment, transportation, and services necessary to complete the work on this project in accordance with the Contract Documents and to complete all requirements of the Contract Documents for the sums quoted in this Bid.
Addenda:
(if any) bidder has received and examined all addenda issued during the bid period and agrees that all addenda shall be made a part of the Contract Documents. The bidder acknowledges receipt and incorporation of all impacts resulting from all addenda issued by inserting the number of each addendum below OR by signing and submitting with the bid proposal the signature page from each addendum.
Addendum Nos. _____, _____, _____, _____, _____, _____, _____, _____ Bidders Guarantee:
In accordance with Public Contract Code Section 20170, accompanying this Bid is _______________ (insert the word Cash, Cashiers Check, Certified Check or Bidders Bond as the case may be) made payable to the City of San Carlos in the amount of ___________________________________________________($_______________) equal to at least ten percent (10%) of the total amount of this bid. This amount is given as a guarantee that, in case the undersigned defaults in executing a contract and/or furnishing the necessary bonds after contract award, the said guarantee and the money payable thereon shall become and remain the property of the City as liquidated damages.
Company Profile:
The names of all persons interested in the foregoing bid as principals are as follows:
(Note: If bidder or other interested person is a corporation, state the legal name of corporation, also names of the president, secretary, treasurer and manager thereof; if partnership, state true name of firm, also names of all individual partners composing firm; if bidder or other interested person is an individual, state first and last name in full).
Firm Name:
Business Address:
Names and Titles of Company Officers:
1. 2.
3. 4.
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-14 Project No. C9465
Proposal Execution:
IN WITNESS WHEREOF, the undersigned, as bidder, represent and warrant that they have the right, power, legal capacity and authority to enter into and execute this document on behalf of the Bidder, and have executed this document by setting hereto their names, titles, and signatures. The representations made herein, including but not limited to the above contractors license, expiration date and name of bidder, are true and correct, shall be complied with and are made under penalty of perjury.
IF SOLE OWNER, sign here:
I sign as sole owner of the business named above.___________________________ Social Security Number:_________________________________________________ Employer Identification Number:___________________________________________ IF PARTNERSHIP, sign here:
The undersigned certify that we are partners in the business named above and that we sign this contract proposal with full authority to do so. (one or more partners sign) ______________________________________________________________________ ______________________________________________________________________ Federal Tax Identification No. (EIN):_________________________________________ State Tax Identification No.:_______________________________________________ IF CORPORATION, execute here:
The undersigned certify that they sign this contract proposal with full and proper authorization to do so.
Corporate name _________________________________________________________ By_____________________________________ (Title) _________________________ By_____________________________________ (Title) _________________________ Incorporated under the laws of the State of ___________________________________ Federal Tax Identification No. (EIN):_________________________________________ State Tax Identification No.:_______________________________________________ Subscribed and sworn to before me, a Notary Public in and for the State of California, County of _____________________, this ______ day of _________________, 20____.
Signature of Notary Public:________________________
My Commission expires __________________, 20_____ (Seal)
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Bid Proposal 2025 Annual Sidewalk Replacement Project
Page P-15 Project No. C9465
BIDDERS BOND
To Accompany Contract Proposal
KNOW ALL PERSONS BY THESE PRESENTS:
That we, the undersigned _________________________________________, as principal and __________________________________, as surety, are held and firmly bound unto the City of San Carlos as OWNER in the penal sum of TEN PERCENT (10%) of the total amount of the bid of the principal, for the payment of which, well and truly to be made, we hereby jointly and severally bind ourselves, successors and assigns.
The condition of the above obligation is such that whereas the Principal has submitted to OWNER a certain BID attached hereto and hereby made a part hereof to enter into a contract in writing, for the 2025 Annual Sidewalk Replacement Project, Project No. C9465.
NOW, THEREFORE
(a) If said BID shall be rejected, or
(b) If said BID shall be accepted and the Principal shall execute and deliver a contract in the Form of Contract attached hereto (properly completed in accordance with said BIDS including all required bonds for faithful performance and labor and material, as well as all required evidence of insurance) then this obligation shall be void, otherwise the same shall remain in force and effect.
In the event the City brings suit upon this Bond, surety shall pay reasonable attorneys fees and costs incurred by the City in such suit.
The Surety, for value received, stipulates and agrees that the obligations of said Surety and its BOND shall be in no way impaired or affected by any extension of the time within which the City of San Carlos may accept such BID; and said Surety does hereby waive notice of any such extension.
IN WITNESS WHEREOF, the Principal and the Surety have hereunto set their hands and seals, and such of them as are corporations have caused their corporate seals to be hereto affixed and these presents to be signed by their proper officers, this day and year first set forth.
By: (L.S.) By:
(Principal) (Seal) (Surety) (Seal) Subscribed and sworn to before me, a Notary Public in and for the State of California, County of _____________________, this ______ day of _________________, 20____.
Signature of Notary Public:________________________ (Seal) My Commission expires __________________, 20_____
IMPORTANT: Surety companies executing BONDS must be authorized to transact Surety insurance in the State of California. If Contractor is Partnership, all partners should execute BOND.
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AGREEMENT AND AGREEMENT FORMS
TABLE OF CONTENTS
Construction Agreement ............................................................................................. A-2 Exhibit A: Contractors Bid Proposal ......................................................................... A-9 Exhibit B: Insurance Coverage .................................................................................. A-10 Resolution of Construction Claims.............................................................................. A-11 Agreement Forms
Payment Bond................................................................................................. A-13 Performance Bond .......................................................................................... A-15 Workers Compensation Certification .............................................................. A-17 Certification of Safety Requirements for Contractors and Vendors ................ A-18 Drug Free Workplace Certification .................................................................. A-19 Escrow Agreement for Security Deposits in Lieu of Retention (Optional)....... A-20 Guarantee ....................................................................................................... A-22
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AGREEMENT FOR PUBLIC PROJECTS
This Agreement is made and entered into as of __________________ by and between the City of San Carlos hereinafter called "CITY" and ____________________ hereinafter called "CONTRACTOR.
RECITALS
This Agreement is entered into with reference to the following facts and circumstances:
A. That CITY desires to engage CONTRACTOR to provide a product and/or services to the CITY;
B. That CONTRACTOR is qualified to provide the product and/or services to the CITY and;
THEREFORE, the CITY has elected to engage CONTRACTOR upon the terms and conditions as hereinafter set forth.
1. Services. The services to be performed by CONTRACTOR under this Agreement are described in Exhibit A, the CONTRACTORS bid proposal which is, by this reference, incorporated herein and made a part hereof as though it were fully set forth herein.
Performance of the services specified in said Exhibit is hereby made an obligation of CONTRACTOR under this Agreement, subject to any changes that may be made subsequently hereto upon the mutual written agreement of the said parties.
Where in conflict, the terms of this Agreement supersede and prevail over any terms set forth in Exhibit A.
2. Term; Termination. (a) The term of this Agreement shall commence upon the date hereinabove written and shall expire upon the date enumerated in Exhibit A, delivery of the product or completion of performance of services hereunder by CONTRACTOR, whichever date shall first occur. (b) Notwithstanding the provisions of (a) above, CITY may terminate this Agreement without cause by giving written notice not less than thirty (30) days prior to the effective date of termination, which date shall be included in said notice. CITY shall compensate CONTRACTOR for any product delivered and/or for services rendered, and reimburse CONTRACTOR for costs and expenses incurred, to the date of termination, calculated in accordance with the provisions of paragraph 3. In ascertaining the services actually rendered to the date of termination, consideration shall be given both to completed work and work in process of completion.
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Nothing herein contained shall be deemed a limitation upon the right of CITY to terminate this Agreement for cause, or otherwise to exercise such rights or pursue such remedies as may accrue to CITY hereunder.
3. Compensation; Expenses; Payment. CITY shall compensate CONTRACTOR for all products supplied or services performed by CONTRACTOR hereunder as shown in Exhibit A attached hereto and by this reference incorporated herein.
Notwithstanding the foregoing, the combined total of compensation and reimbursement of costs payable hereunder shall not exceed the sum of __________________$_________, as provided in the approved bid documents or in this Agreement unless additional amounts have been authorized in the acceptance of the bid and approved in advance of supplying the product, performing the services or incurring the costs and expenses by CITYs City Manager (for contracts less than $175,000 or authorized by City Council action for contracts $175,000 or more by motion duly made and carried).
Compensation and reimbursement of costs and expenses hereunder shall be payable upon CONTRACTOR meeting contract milestones as defined in Exhibit A. Billing shall include an itemized statement, briefly describing by task and labor category or cost/expense items billed.
4. Contractor affirms that its employees and contractors comply with California Prevailing Wage Law.
5. Additional Services. In the event the public project requires the delivery of additional products or performance of additional services not otherwise included within Exhibit A, such products or services must be authorized in advance by CITYs City Manager (for contracts less than $175,000 or authorized by City Council action for contracts $175,000 or more. Such amendment to this Agreement shall include a description of the project or services to be performed thereunder, the maximum compensation and reimbursement of costs and expenses payable therefore, the time of performance thereof, and such other matters as the parties deem appropriate. Any additional services causing the total contract price to exceed $175,000, shall require approval by the City Council. Except to the extent modified by written amendment, all other terms and conditions of this Agreement shall be deemed incorporated in each such amendment.
6. Records. CONTRACTOR shall keep and maintain accurate records of products delivered or of all time expended in performing services and costs and expenses incurred relating thereto. Said records shall be available to CITY for review and copying during regular business hours at
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CONTRACTORs place of business or as otherwise agreed upon by the parties.
7. Authorization. This Agreement becomes effective when endorsed by both parties in the space provided below.
8. Reliance on Specialized Professional Skill of CONTRACTOR.
CONTRACTOR represents that it has the necessary professional skills to perform the services required and the CITY shall rely on such specialized skills of the CONTRACTOR to do and perform the work. In performing services hereunder CONTRACTOR shall adhere to the standards generally prevailing for the performance of services similar to those to be performed by CONTRACTOR hereunder.
9. Documents. All documents, plans, drawings, renderings, and other papers, or copies thereof, as finally rendered, prepared by CONTRACTOR pursuant to the terms of this Agreement, shall, upon preparation and delivery to CITY, become the property of CITY
10. Relationship of Parties. It is understood that the relationship of CONTRACTOR to the CITY is that of an independent contractor and all persons working for or under the direction of CONTRACTOR are its agents or employees and not agents or employees of the CITY.
11. Schedule. CONTRACTOR shall adhere to the schedule set forth in Exhibit A; provided, that CITY shall grant reasonable extensions of time for the delivery of products or performance of services occasioned by governmental reviews of CONTRACTORs work product or other unavoidable delays; provided, further, that such unavoidable delay shall not include strikes, lockouts, work stoppages, or other labor disturbances conducted by, or on behalf of, CONTRACTORs officers or employees.
CONTRACTOR acknowledges the importance to CITY of timely delivery of products or services and agrees to put forth its best professional efforts to perform in a manner consistent with that schedule.
12. Indemnity. CONTRACTOR shall indemnify, defend, and hold harmless City, its officers, employees, agents and volunteers from and against all liability, loss, damage, expense, and cost (including, without limitation, reasonable legal counsel fees, expert fees and all other costs and fees of litigation) of every nature arising out of or in connection with CONTRACTORs negligence, recklessness, or willful misconduct in the performance of work hereunder, or its failure to comply with any of its obligations contained in this Agreement, except such loss or damage caused by the active negligence or willful misconduct of the City. It is expressly understood and agreed that the foregoing provisions are
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intended to be as broad and inclusive as is permitted by the law of the State of California and will survive termination of this Agreement.
Nothing herein contained shall be construed to require CONTRACTOR to indemnify CITY, its officers, employees, agents and volunteers against any responsibility or liability in contravention of Section 2782 of the California Civil Code.
13. Insurance. CONTRACTOR shall acquire and maintain Workers Compensation, employers liability, commercial general liability, owned and non-owned and hired automobile liability insurance coverage relating to CONTRACTORs services to be performed hereunder covering CITYs risks in form subject to the approval of the City Attorney and/or CITYs Risk Manager. The minimum amounts of coverage corresponding to the aforesaid categories of insurance per insurable event shall be as follows:
Insurance Category Minimum Limits
Workers Compensation statutory minimum
Employers Liability $1,000,000 per accident for
bodily injury or disease.
Contractor shall submit to City a
Waiver of Subrogation
endorsement in favor of City, its
officers, agents, employees, and
volunteers.
Commercial General Liability
$2,000,000 per occurrence for
Liability bodily injury,
personal injury, and property
damage, including without
limitation, blanket contractual
liability and coverage for
explosion, collapse and
underground property damage
hazards. If a general aggregate
limit applies, either the general
aggregate limit shall apply
separately to this project/location
or the general aggregate limit
shall be twice the required
occurrence limit. Coverage must
be at least as broad as Insurance
Services Office form CG 00 01.
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Automobile Liability
$2,000,000 per accident for
bodily injury and property
damage (coverage required to
the extent applicable to
CONTRACTORs vehicle usage
in performing services hereunder)
Concurrently with the execution of this Agreement, CONTRACTOR shall furnish CITY with certificates and copies of information or declaration pages of the insurance required hereunder and, with respect to evidence of commercial general liability and automobile liability insurance coverage, original endorsements:
(a) Precluding cancellation or reduction in per occurrence limits before the expiration of thirty (30) days (10 days for nonpayment) after CITY shall have received written notification of cancellation in coverage or reduction in per occurrence limits by first class mail; (b) Contractors general liability policies shall be primary and non- contributory, and be endorsed using Insurance Services Office form CG 20 10 to provide that City and its officers, officials, employees, and agents shall be additional insureds under such policies. An endorsement providing completed operations coverage for the additional insured, ISO form CG 20 37, is also required.
Claims Made Policies
If any of the required policies provide claims-made coverage:
1. The Retroactive Date must be shown, and must be before the date of the contract or the beginning of contract work.
2. Insurance must be maintained and evidence of insurance must be provided for at least five (5) years after completion of the contract of work.
3. If coverage is canceled or non-renewed, and not replaced with another claims-made policy form with a Retroactive Date prior to the contract effective date, the CONTRACTOR must purchase extended reporting coverage for a minimum of five (5) years after completion of contract work.
Verification of Coverage
CONTRACTOR shall furnish the CITY with original certificates and amendatory endorsements effecting coverage required by this clause. All certificates and endorsements are to be received and approved by the CITY before work commences. However, failure to obtain the required documents prior to the work beginning shall not waive the CONTRACTORs obligation to provide them. The CITY reserves the right
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to require complete, certified copies of all required insurance policies, including endorsements required by these specifications, at any time.
Waiver of Subrogation
CONTRACTOR hereby grants to CITY a waiver of any right to subrogation which any insurer of said CONTRACTOR may acquire against the CITY by virtue of the payment of any loss under such insurance. This provision applies regardless of whether or not the CITY has requested or received a waiver of subrogation endorsement from the insurer.
Acceptability of Insurers
Insurance is to be placed with insurers with a current A.M. Bests rating of no less than A:VII, unless otherwise acceptable to the City.
Special Risks or Circumstances
CITY reserves the right to modify these requirements, including limits, based on the nature of the risk, prior experience, insurer, coverage, or other special circumstances.
Coverage
It is a requirement under this agreement that any available insurance proceeds broader than or in excess of the specified minimum insurance coverage requirements and/or limits shall be made available to the Additional Insured and shall be (1) the minimum coverage and limits specified in this Agreement; or (2) the broader coverage and maximum limits of coverage of any insurance policy, whichever is greater.
CONTRACTOR shall maintain insurance as required by this contract to the fullest amount allowed by law and shall maintain insurance for a minimum of five years following completion of the project. In the event contractor fails to obtain or maintain completed operations coverage as required by this agreement, the city at its sole discretion may purchase the coverage required and the cost shall be paid by CONTRACTOR.
Primary and Non-Contributory Coverage
The Additional Insured coverage under the CONTRACTORs policy shall be primary and non-contributory as will not seek contribution from the CITY insurance or self-insurance and shall be at least as broad as CG 20 01 04 12.
Excess Insurance
The limits of insurance required in this agreement may be satisfied by a combination of primary and umbrella or excess insurance. Any umbrella or excess insurance shall contain or be endorsed to contain a provision that such coverage shall also apply on a primary and noncontributory
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basis for the benefit of CITY before the CITY insurance or self-insurance shall be called upon to protect it as a named insured.
14. SUBCONTRACTORS. CONTRACTOR agrees to include with all subcontractors in their subcontracts the same requirements and provisions of this agreement including the indemnity and Insurance requirements to the extent they apply to the scope of the Subcontractors work. Subcontractors hired by CONTRACTOR agree to be bound to CONTRACTOR and CITY in the same manner and to the same extent as CONTRACTOR is bound to CITY under the Contract documents.
Subcontract shall agree to include these same provisions in any agreement with a sub-subcontractor. CONTRACTOR shall require all subcontractors to provide a valid certificate of insurance and the required endorsements included in the agreement prior to commencement of any work and will provide proof of compliance to the CITY.
Subcontractor shall agree to be bound to CONTRACTOR and CITY in the same manner and to the same extent as CONTRACTOR is bound to CITY under the Contract Documents. Subcontractor shall further agree to include the same requirements and provisions of this agreement, including the indemnity and Insurance requirements, with a Sub-subcontractor to the extent they apply to the scope of the Sub-subcontractors work. A copy of the CITY Contract Document Indemnity and Insurance provisions shall be furnished to the subcontractor upon request.
15. WORKERS' COMPENSATION. CONTRACTOR certifies that he/she/it is aware of the provisions of the Labor Code of the State of California which require every employer to be insured against liability for workers' compensation or to undertake self-insurance in accordance with the provisions of that Code, and CONTRACTOR certifies that he will comply with such provisions before commencing the performance of the work of this agreement.
16. NON-DISCRIMINATION. The CONTRACTOR hereby assures that it will comply with Subchapter VI of the Civil Rights Act of 1964, 42 USC Section 2000 (e)(17), to the end that CONTRACTOR will not exclude any person from participation in, be denied the benefits of, or be otherwise subject to discrimination from any project, program, or activity supported by this Agreement, based on the grounds of race, color, national origin, sex, disability, age, or religion,. CONTRACTOR shall comply with its EEO Certification (Form PW-7). In addition, CONTRACTOR will not discriminate against any employee or applicant for employment because of race, color, religion, sex or national origin. The CONTRACTOR will take affirmative action to insure that applicants are employed and the employees are treated during employment without regard to their race, color, religion, sex or national origin. Such action shall include, but not be
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limited to the following: employment, advancement, demotion, transfer, recruitment, or recruitment advertising, layoff or termination, rates of pay or other forms of compensation, and selection for training, including apprenticeship. The CONTRACTOR shall at all times be in compliance with the requirements of the Federal Americans With Disabilities Act (Public Law 101-336) which prohibits discrimination on the basis of disability by public entities. The CONTRACTOR agrees to post in conspicuous places available to employees and applicants for employment any notices provided by the CITY setting forth the provisions of this non-discrimination clause.
17. Notice. All notices required by this Agreement shall be given to the CITY and CONTRACTOR in writing, by first class mail, postage prepaid, addressed as follows:
CITY: City of San Carlos
600 Elm Street
San Carlos, CA 94070
Attention:
CONTRACTOR: _____________________
Address
Phone
Attention: ______________
18. Non-Assignment. This Agreement is not assignable either in whole or in part.
19. Amendments. This Agreement may be amended or modified only by written agreement signed by both parties.
20. Business Registration. CONTRACTOR agrees to comply with Chapter
5.04 of the Municipal Code and pay all fees required to be paid.
21. Validity. The invalidity in whole or in part of any provision of this Agreement shall not void or affect the validity of any other provision of this Agreement.
22. Governing Law. This Agreement shall be governed by the laws of the State of California and any suit or action initiated by either party shall be brought in the County of San Mateo, California. In the event of litigation between the parties hereto to enforce any provision of the Agreement, the unsuccessful party will pay the reasonable attorneys fees and expenses of litigation of the successful party.
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23. Mediation. Should any dispute arise out of this Agreement, the parties shall meet in mediation and attempt to reach a resolution with the assistance of a mutually acceptable mediator. Neither party shall be permitted to file legal action without first meeting in mediation and making a good faith attempt to reach a mediated resolution. The costs of the mediator, if any, shall be paid equally by the parties. If a mediated settlement is reached neither party shall be deemed the prevailing party for purposes of the settlement and each party shall bear its own legal costs. If a party refuses or fails to participate in mediation in good faith prior to filing a lawsuit, then that party shall be barred from recovery of attorneys fees and costs of suit.
24. Conflict of Interest. CONTRACTOR may serve other clients, but none who are active within the City of San Carlos or who conduct business that would place CONTRACTOR in a "conflict of interest" as that term is defined in State law.
25. Entire Agreement. Each party acknowledges that this agreement, the exhibits hereto, and the documents incorporated by reference herein constitute the complete agreement and exclusive statement of the terms and conditions between the parties, which supercedes and merges all prior proposals, understandings and all other agreements, verbal and written, between the parties relating to the subject matter of this agreement. This agreement may not be modified or altered except by written instrument duly executed by both parties.
IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be executed on the date first above written by their respective officers duly authorized in that behalf.
CITY OF SAN CARLOS:
Dated: _______________ ______________________________
Jeff Maltbie, City Manager
ATTEST:
Dated: _______________ ______________________________
Crystal Mui, City Clerk
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APPROVED AS TO FORM:
Dated: _______________ ______________________________
Gregory J. Rubens, City Attorney
CONSULTANT/CONTRACTOR/VENDOR:
I acknowledge that I have full authority to execute this agreement on behalf of the Consultant/Contractor/Vendor, and have read, understand, and agree to comply with the provisions of this Agreement, including the Insurance and indemnity requirements set forth herein.
Dated: _______________ ______________________________
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EXHIBIT A
CONTRACTORS BID PROPOSAL
[To be attached]
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EXHIBIT B
This INSURANCE COVERAGE FORM modifies or documents insurance provided under the following:
Named Insured: Effective Work Date(s):
Description of Work/Locations/Vehicles:
ADDITIONAL INSURED: City of San Carlos
600 Elm Street, San Carlos, CA 94070
Attention: _________________________________
Contract Administrator
Endorsement and Certificates of Insurance Required
The Additional Insured, its elected or appointed officers, officials, employees and volunteers are included as insureds with regard to damages and defense of claims arising from: (Check all that apply) Insurer Policy No.
General Liability: (a) activities performed by or on behalf of the Named Insured, (b) products and completed operations of the Named Insured, (c) premises owned, leased occupied or used by the Named Insured, and/or (d) permits issued for operations performed by the Named Insured. {Note:
MEETS OR EXCEEDS ISO Form # CG 20 10 11 85}
Auto Liability : the ownership, operation, maintenance, use, loading or unloading of any auto owned, leased, hired or borrowed by the Named Insured, regardless of whether liability is attributable to the Named Insured or a combination of the Named Insured and the Additional Insured, its elected or appointed officers, officials, employees or volunteers.
Other:
Certificates of Insurance Required (no endorsement needed) (Check all that apply)
Insurer Policy No.
Workers Compensation: work performed by employees of the Named Insured while those employees are engaged in work under the simultaneous directions and control of the Named Insured and the Additional Insured.
Professional Liability:
PRIMARY/NON-CONTRIBUTORY: This insurance is primary and is not additional to or contributing with any other insurance carried by or for the benefit of Additional Insureds.
SEVERABILITY OF INTEREST: The insurance afforded by this policy applies separately to each insured who is seeking coverage or against whom a claim is made or a suit is brought, except with respect to the insurers limit of liability.
PROVISIONS REGARDING THE INSURED'S DUTIES AFTER ACCIDENT OR LOSS: Any failure to comply with reporting provisions of the policy shall not affect coverage provided to the Additional Insured, its elected or appointed officers, officials, employees, or volunteers.
CANCELLATION NOTICE. The insurance afforded by this policy shall not be suspended, voided, canceled, reduced in coverage or in limits except after thirty (30) days' prior written notice (ten (10) days if canceled due to non-payment) by regular mail return receipt requested has been given to the Additional Insured. Such notice shall be addressed as shown above.
WAIVER OF SUBROGATION: The insurer(s) named above agree to waive all rights of subrogation against the CITY/Public Works Departmentt, its elected or appointed officers, officials, agents, volunteers and employees for losses paid under the terms of this policy which arise from work performed by the Named Insured for the CITY/Public Works Department.
Nothing herein contained shall vary, alter or extend any provision or condition of the Policy other than as above stated.
SIGNATURE OF INSURER OR AUTHORIZED REPRESENTATIVE OF THE INSURER I, _______________________________________________________________(print/type name), warrant that I have authority to bind the above-named insurance company and by my signature hereon do so bind this company. ________________________________________________________________ _____________________ SIGNATURE OF AUTHORIZED REPRESENTATIVE (original signature required) DATE ISSUED ORGANIZATION:_________________________________________ TITLE:______________________________ ADDRESS: _____________________________________________ TELEPHONE: ( )
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RESOLUTION OF CONSTRUCTION CLAIMS
Any public works claims arising under this contract which the Contractor wishes to assert against the Governing Agency and which do not exceed three hundred seventy-five thousand dollars ($375,000) shall be governed by the provisions of Article 1.5 of the California Public Contract Code (commencing with Section 20104). A copy of the provisions of Article 1.5 follows:
§20104. (a) (1) This article applies to all public works claims of three hundred seventy- five thousand dollars ($375,000) or less which arise between a Contractor and a local agency. (2) This article shall not apply to any claims resulting from a contract between a Contractor and a public agency when the public agency has elected to resolve any disputes pursuant to Article 7.1 (commencing with Section 10240) of Chapter 1 of Part 2. (b) (I) Public work has the same meaning as in Sections 3100 and 3106 of the Civil Code, except that public work does not include any work or improvement contracted for by the state or the Regents of the University of California.
(2) Claim means a separate demand by the Contractor for (A) a time extension, (B) payment of money or damages arising from work done by or on behalf of the Contractor pursuant to the contract for a public work and payment of which is not otherwise expressly provided for or the claimant is not otherwise entitled to, or (C) an amount the payment of which is disputed by the local agency. (c) The provisions of this article or a summary thereof shall be set forth in the specifications for any work which may give rise to a claim under this article. (d) This article applies only to contracts entered into on or after January 1, 1991. §20104.2 For any claim subject to this article, the following requirements apply:
(a) The claim shall be in writing and include the documents necessary to substantiate the claim. Claims must be filed on or before the date of final payment. Nothing in this subdivision is intended to extend the time limit or supersede notice requirements otherwise provided by contract for the filing of claims.
(b) (1) For claims of less than fifty thousand dollars ($50,000), the local agency shall respond in writing to any written claim within forty-five (45) days of receipt of the claim, or may request, in writing, within thirty (30) days of receipt of the claim, any additional documentation supporting the claim or relating to defenses or claims the local agency may have against the claimant (2) If additional information is thereafter required, it shall be requested and provided pursuant to this subdivision, upon mutual agreement of the local agency and the claimant. (3) The local agencys written response to the claim as further documented, shall be submitted to the claimant within fifteen (15) days after receipt of the further documentation or within a period of time no greater than that taken by the claimant in producing the additional information, whichever is greater.
(c) (1) For claims of over fifty thousand dollars ($50,000) and less than or equal to three hundred seventy-five thousand dollars ($375,000), the local agency shall respond in writing to all written claims within 60 days of receipt of the claim, or may request, in writing, within thirty (30) days of receipt of the claim, any additional documentation supporting the claim or relating to defenses or claims the local
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agency may have against the claimant.
(2) If additional information is thereafter required, it shall be requested and provided pursuant to this subdivision, upon mutual agreement of the local agency and the claimant. (3) The local agencys written response to the claim as further documented, shall be submitted to the claimant within 30 days after receipt of the further documentation, or within a period of time no greater than that taken by the claimant in producing the additional information or requested documentation, whichever is greater.
(d) If the claimant disputes the local agencys written response, or the local agency fails to respond within the time prescribed, the claimant may so notify the local agency, in writing, either within fifteen (15) days of receipt of the local agencys response or within 15 days of the local agencys failure to respond within the time prescribed, respectively, and demand an informal conference to meet and confer for settlement of the issues in dispute. Upon a demand, the local agency shall schedule a meet and confer conference within thirty (30) days for settlement of the dispute. (e) If following the meet and confer conference the claim or any portion remains in dispute, the claimant may file a claim pursuant to Chapter 1 (commencing with Section 900) and Chapter 2 (commencing with Section 910) of Part 3 of Division 3.6 of Title 1 of the Government Code. For purposes of those provisions, the running of the period of time within which a claim must be filed shall be tolled from the time the claimant submits his or her written claim pursuant to subdivisions (a) until the time the claim is denied, including any period of time utilized by the meet and confer conference. §20104.4 The following procedures are established for all civil actions filed to resolve claims subject to this article:
(a) Within sixty (60) days, but no earlier than thirty (30) days, following the filing or responsive pleadings, the court shall submit the matter to nonbinding mediation unless waived by mutual stipulation of both parties. The mediation process shall provide for the selection within fifteen (15) days by both parties of a disinterested third person as mediator, shall be commenced within thirty (30) days of the submittal, and shall be concluded within fifteen (15) days from the commencement of the mediation unless a time requirement is extended upon a goad cause showing to the court. (b) (1) If the matter remains in dispute, the case shall be submitted to judicial arbitration pursuant to Chapter 2.5 (commencing with Section 1141.10) of Title 3 of Part 3 of the code of Civil Procedure, notwithstanding Section 1141.11 of that code. The Civil Discovery Act of 1986 (Article 3 (commencing with Section 2016) of Chapter 3 of Title 3 of Part 4 of the code of Civil Procedure) shall apply to any proceeding brought under this subdivision consistent with the rules pertaining to judicial arbitration. (2) In addition to Chapter 2.5 (commencing with Section 1141.10) of Title 3 of Part 3 of the Code of Civil Procedure, (A) arbitrators shall, when possible, be experienced in construction law, and (B) any party appealing an arbitration award who does not obtain a more favorable judgement shall, in addition to payment of costs and fees under that Chapter, also pay the attorneys fees on appeal of the other party.
§20104.6
(a) No local agency shall fail to pay money as to any portion of a claim which is undisputed except as otherwise provided in the contract.
(b) In any suit filed under Section 20104.4, the local agency shall pay interest at the legal rate on any arbitration award or judgment. The interest shall begin to accrue on the date the suit is filed in a court of law.
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PAYMENT BOND
KNOW ALL MEN BY THESE PRESENTS, that
WHEREAS, The City of San Carlos (hereinafter referred to as Owner) and (hereinafter referred to as Principal) have entered into a contract for the construction of 2025 Annual Sidewalk Replacement Project, Project N o.
C9465 and
WHEREAS, under the terms of said contract Principal is required to furnish a bond securing payment of the claims to which reference is made in Section 3248 of the Civil Code; NOW, THEREFORE, we, the Principal, and
, as Surety, are held and firmly bound unto the
Owner in the penal sum of
/l00 Dollars ($ )
lawful money of the United States, being not less than one hundred percent (100%) of the amount payable by the terms of the contract, for the payment of which sum well and truly to be made we bind ourselves, our heirs, executors, administrators and successors, jointly and severally, firmly by these presents.
The condition of this obligation is such that if said Principal or any of its subcontractors fails to pay any of the persons named in Section 3181 of the Civil Code, or amounts due under the Unemployment Insurance Code with respect to work or labor performed under the contract, or for any amounts required to be deducted, withheld, and paid over to the Franchise Tax Board from the wages of employees of the Principal or its subcontractors pursuant to Section 18806 of the Revenue and Taxation Code, with respect to such work and labor that the Surety will pay for the same, in an amount not exceeding the amount hereinabove set forth and also will pay, in case suit is brought upon this bond, a reasonable attorneys fee, to be fixed by the court. We hereby state and confirm that we are a California admitted insurer as defined by the California Department of Insurance.
This bond shall inure to the benefit of any of the persons named in Section 3181 of the Civil Code so as to give a right of action to such persons or their assigns in any suit brought upon this bond.
This bond is given to comply with Sections 3247 and 3248 of the Civil Code. The liability of the Principal and Surety hereunder is governed by the provisions of said Code, all acts amendatory thereof, and all other statutes referred to therein, including Section 3225 of the Civil Code.
The Surety hereby stipulates and agrees that no change, extension of time, alteration or addition to the terms of the contract or to the work to be performed there under or the specifications accompanying the same shall in any ways affect its obligation on this bond, and it does hereby waive notice of any such change, extension of time, alteration or addition to the terms of the contract or to the work or to the specifications.
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IN WITNESS WHEREOF, the above bounded parties have executed this instrument under their seals this _________ day of __________________, 20 , the name and corporate seal of each corporate body being hereto affixed and these presents duly signed by its undersigned representative, pursuant to authority of its governing body. (Principal)
NOTE: By
To be signed by By
Principal and Surety
and acknowledgment
and nortarial seal
(Surety)
By
By
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PERFORMANCE BOND
KNOW ALL MEN BY THESE PRESENTS, that
WHEREAS, the City of San Carlos (hereinafter referred to as Owner) has entered into a contract with (hereinafter referred to as Principal) for the construction of 2025 Annual Sidewalk Replacement Project, Project No. C9465, and WHEREAS, said Principal is required under the terms of said contract to furnish a bond of faithful performance of said Contract;
NOW, THEREFORE, we, the Principal, and
, as Surety, are held and firmly bound unto the
Owner in the penal sum of
/l00 Dollars ($ )
lawful money of the United States, being a sum equal to the total amount payable under the contract, for the payment of which sum, well and truly to be made, we bind ourselves, our heirs, executors, administrators and successors, jointly and severally, firmly by these presents.
THE CONDITION OF THIS OBLIGATION IS SUCH that if the above bounded Principal shall in all things stand to and abide by and well and truly keep and perform the covenants, conditions and agreements in the said contract and any alteration thereof made as therein provided, on his part to be kept and performed at the time and in the manner therein specified, and in all respects according to their true intent and meaning, as therein stipulated, then this obligation shall become null and void; otherwise it shall be and remain in full force and virtue.
As a condition precedent to satisfactory completion of the said contract, the above obligations to the amount of and-00/100 Dollars ($ ) being not less than ten percent (10%) of the total amount payable under the contract, shall hold good for a period of two (2) years after the completion and acceptance of said work, during which time if the above Principal shall fail to make full, complete and satisfactory repair and replacement or totally protect the Owner from loss or damage made evident during said period of two (2) years from the date of acceptance of said work, and resulting from or caused by defective materials or faulty workmanship in the prosecution of the work done, the above obligations in the said sum of and-00/100 Dollars ($ ) shall remain
in full force and virtue; otherwise the above obligation shall be void.
And the said Surety, for value received, hereby stipulates and agrees that no change, extension of time, alteration or addition to the terms of the Contract or to the work to be performed there under of the Specifications accompanying the same shall in any ways affect its obligations on this bond, and it does hereby waive notice of any such change, extension of time, alteration or addition to the terms of the contract or to the work or to the Specifications. We hereby state and confirm that we are a California admitted insurer as defined by the California Department of Insurance.
In the event that the Owner or its successors or assigns, shall be the prevailing party in an action brought upon this bond, then, in addition to the penal sum hereinabove specified, we
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agree to pay to the Owner for its successors or assigns, a reasonable sum on account of attorneys fees in such action, which sum shall be fixed by the court.
IN WITNESS WHEREOF, the above bounded parties have executed this instrument under their seals this _________ day of __________________, 20 , the name and corporate seal of each corporate party being hereto affixed and these presents duly signed by its undersigned representative, pursuant to the authority of its governing body. (Principal)
NOTE: By
To be signed by By
Principal and Surety
and acknowledgment
and nortarial seal
(Surety)
By
By
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WORKERS' COMPENSATION CERTIFICATION
Labor Code Section 1861
The Bidder hereby certifies as follows:
"I am aware of the provisions of Section 3700 of the Labor Code, which requires every employer to be insured against liability for Workers' Compensation or to undertake self-insurance in accordance with the provisions of that code, and I will comply with such provisions and furnish proof of said insurance before commencing the performance of the work of this contract."
Name of Contractor
Signature of Contractor Representative
Dated: __________________________
NOTE: THIS CERTIFICATION MUST BE COMPLETED AND RETURNED BY THE SUCCESSFUL BIDDER PRIOR TO THE START OF CONSTRUCTION.
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CERTIFICATION OF SAFETY REQUIREMENTS FOR
CONTRACTORS AND VENDORS
California Code of Regulations, Title 8, Section 1509
To work as a contractor or vendor with the City of San Carlos, your organization is required to certify that it has an active on-the-job written Injury and Illness Prevention Program. This program is essential to make the job as accident-free as possible and to comply with Federal and State Safety Standards.
The undersigned hereby certifies that his/her organization has an active written Injury and Illness Prevention Program, as required by Cal-OSHA under California Code of Regulations, Title 8, General Industry Safety Orders, Section 3203 and/or Construction Safety Orders, Section 1509, that ensures compliance with, and enforcement of, current minimum Cal-OSHA Safety Standards, and that his/her organization has knowledge of these standards that are applicable to the job operations. This includes a program for ensuring employees have been trained to recognize hazards of their job.
The undersigned also hereby certifies that his/her organization has an active written Hazard Communication Program with evidence that all employees have been trained in safe use and handling of chemicals on the job site, and a file will be made available for review by the City of San Carlos of each Material Safety Data Sheet (MSDS) on those chemicals kept on the site.
Name of Contractor
Signature of Contractor Representative
Dated: __________________________
NOTE: THIS CERTIFICATION MUST BE COMPLETED AND RETURNED BY THE SUCCESSFUL BIDDER PRIOR TO THE START OF CONSTRUCTION.
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DRUG-FREE WORKPLACE CERTIFICATION
The bidder_________________________________________________________________, hereby certifies compliance with Government Code Section 8355 in matters relating to providing a drug-free workplace. The contractor will:
1. Publish a statement notifying employees that unlawful manufacture, distribution, dispensation, possession, or use of a controlled substance is prohibited and specifying actions to be taken against employees for violations, as required by Government Code Section 8355(a).
2. Establish a Drug-Free Awareness Program as required by Government Code Section 8355(b), to inform employees about all of the following:
(a) The dangers of drug abuse in the workplace,
(b) The persons or organizations policy of maintaining a drug-free workplace, (c) Any available counseling, rehabilitation and employee assistance programs, and (d) Penalties that may be imposed upon employees for drug abuse violations.
3. Provide as required by Government Code Section 8355(c), that every employee who works on the proposed contract or loan:
(a) Will receive a copy of the companys drug-free policy statement, and (b) Will agree to abide by the terms of the companys statement as a condition of employment on the contract or loan.
I, the official named below, hereby swear that I am duly authorized legally to bind the contractor to the above described certification. I am fully aware that this certification, executed on the date below, is made under penalty of perjury under the laws of the State of California.
Dated:_______________________, 20____.
________________________________
Contractors Signature
NOTE: THIS CERTIFICATION MUST BE COMPLETED AND RETURNED BY THE SUCCESSFUL BIDDER PRIOR TO THE START OF CONSTRUCTION.
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ESCROW AGREEMENT FOR SECURITY DEPOSITS IN LIEU OF RETENTION (Optional) Public Contract Code Section 22300
This Escrow Agreement is made and entered into by and between _______________________________ whose address is __________________________________________________ hereinafter called "Owner,"________________________________ whose address is ______________________________
____________________hereinafter called "Contractor" and ____________________________________ whose address is __________________________________________ hereinafter called "Escrow Agent." For the consideration hereinafter set forth, the Owner, Contractor, and Escrow Agent agree as follows:
(1) Pursuant to Section 22300 of the Public Contract Code of the State of California, Contractor has the option to deposit securities with Escrow Agent as a substitute for retention earnings required to be withheld by Owner pursuant to the Construction Contract entered into between the Owner and Contractor for __________________ in the amount of _______________ dated __________ (hereinafter referred to as the "Contract"). Alternatively, on written request of the Contractor, the Owner shall make payments of the retention earnings directly to the Escrow Agent. When the Contractor deposits the securities as a substitute for Contract earnings, the Escrow Agent shall notify the Owner within 10 days of the deposit. The market value of the securities at the time of the substitution shall be at least equal to the cash amount then required to be withheld as retention under the terms of the Contract between the Owner and Contractor. Securities shall be held in the name of ____________________, and shall designate the Contractor as the beneficial owner. (2) The Owner shall make progress payments to the Contractor for those funds which otherwise would be withheld
from progress payments pursuant to the Contract provisions, provided that the Escrow Agent holds securities in the form and amount specified above.
(3) When the Owner makes payment of retentions earned directly to the Escrow Agent, the Escrow Agent shall hold them for the benefit of the Contractor until the time that the escrow created under this contract is terminated.
The Contractor may direct the investment of the payments into securities. All terms and conditions of this agreement and the rights and responsibilities of the parties shall be equally applicable and binding when the Owner pays the Escrow Agent directly.
(4) Contractor shall be responsible for paying all fees for the expenses incurred by Escrow Agent in administering the Escrow Account and all expenses of the Owner. These expenses and payment terms shall be determined by the Owner, Contractor, and Escrow Agent.
(5) The interest earned on the securities or the money market accounts held in escrow and all interest earned on that interest shall be for the sole account of Contractor and shall be subject to withdrawal by Contractor at any time and from time to time without notice to the Owner. (6) Contractor shall have the right to withdraw all or any part of the principal in the Escrow Account only by written notice to Escrow Agent accompanied by written authorization from the Owner to the Escrow Agent that Owner consents to the withdrawal of the amount sought to be withdrawn by Contractor. (7) The Owner shall have a right to draw upon the securities in the event of default by the Contractor. Upon seven (7) days written notice to the Escrow Agent from the owner of the default, the Escrow Agent shall immediately convert the securities to cash and shall distribute the cash as instructed by the Owner.
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(8) Upon receipt of written notification from the Owner certifying that the Contract is final and complete, and that the Contractor has complied with all requirements and procedures applicable to the Contract, Escrow Agent shall release to Contractor all securities and interest on deposit less escrow fees and charges of the Escrow Account.
The escrow shall be closed immediately upon disbursement of all moneys and securities on deposit and payments of fees and charges.
(9) Escrow Agent shall rely on the written notifications from the Owner and the Contractor pursuant to Sections (5) to (8), inclusive, of this agreement and the Owner and Contractor shall hold Escrow Agent harmless from Escrow Agent's release and disbursement of the securities and interest as set forth above. (10) The names of the persons who are authorized to give written notice or to receive written notice on behalf of the Owner and on behalf of Contractor in connection with the foregoing, and exemplars of their respective signatures are as follows:
On behalf of Owner: On behalf of Contractor: On behalf of Escrow Agent:
___________________________ ___________________________ _______________________________ Title Title Title
___________________________ ___________________________ _______________________________ Name Name Name
___________________________ ___________________________ _______________________________ Signature Signature Signature
___________________________ ___________________________ _______________________________ Address Address Address
At the time the Escrow Account is opened, the Owner and Contractor shall deliver to the Escrow Agent a fully executed counterpart of this Agreement.
IN WITNESS WHEREOF, the parties have executed this Agreement by their proper officers on the date first set forth above.
Owner: Contractor:
______________________________ ___________________________________ Title Title
______________________________ ___________________________________ Name Name
______________________________ ___________________________________ Signature Signature
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GENERAL PROVISIONS
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TABLE OF CONTENTS
SECTION 1 TERMS AND DEFINITIONS
1.01 Terms ........................................................................................................................................ 1
1.02 Definitions.................................................................................................................................. 1 SECTION 2 PROPOSAL REQUIREMENTS AND CONDITIONS
2.01 General...................................................................................................................................... 6
2.02 Proposal Forms ......................................................................................................................... 6
2.03 Qualifications of Bidders............................................................................................................ 6
2.04 Rejection of Proposals Containing Alterations, Erasures, or Irregularities ................................ 6
2.05 Submission of Bids .................................................................................................................... 6
2.06 Approximate Estimate ............................................................................................................... 7
2.07 Examination of Plans, Specifications and Work Site ................................................................. 7
2.08 Withdrawal of Proposals............................................................................................................ 7
2.09 Proposal Guarantee .................................................................................................................. 7
2.10 Disqualification of Bidders ......................................................................................................... 7
2.11 Bid Protest Procedures.............................................................................................................. 7
2.12 List of Subcontractors................................................................................................................ 8
2.13 Required Contractor and Subcontractor Registration................................................................ 8 SECTION 3 REVIEW OF BIDS, CONTRACT AWARD AND EXECUTION
3.01 Public Bid Opening and Initial Review....................................................................................... 9
3.02 Determination of Lowest Responsible Bidder............................................................................ 9
3.03 Notice of Award ......................................................................................................................... 10
3.04 Contract Execution .................................................................................................................... 10
3.05 Status of Contractor................................................................................................................... 10
3.06 Assignment................................................................................................................................ 10
3.07 Recognition of Subcontractors .................................................................................................. 10
3.08 Return of Bid Security................................................................................................................ 10
3.09 Forfeiture of Proposal Guarantee .............................................................................................. 11
3.10 Contract Bonds.......................................................................................................................... 11
3.11 Notification of Surety Companies .............................................................................................. 12
3.12 Power of Attorney ...................................................................................................................... 12
3.13 Insurance Requirements ........................................................................................................... 12
3.14 Special Requirements ............................................................................................................... 12
3.15 Builders Risk Insurance............................................................................................................. 13
3.16 Certificates................................................................................................................................. 13
3.17 Legal Address of Contractor...................................................................................................... 13
3.18 Office of Contractor at Site ........................................................................................................ 13 SECTION 4 SCOPE AND CONTROL OF THE WORK
4.01 Work to be Done........................................................................................................................ 14
4.02 Plans and Specifications ........................................................................................................... 14
4.03 Reference to Standards and Codes .......................................................................................... 14
4.04 Authority of the Engineer ........................................................................................................... 15
4.05 Contract Documents and Precedence....................................................................................... 15
4.06 Interpretation of Specifications and Drawings ........................................................................... 15
4.07 Figured Dimensions................................................................................................................... 15
4.08 Errors or Discrepancies ............................................................................................................. 16
4.09 Drawings to be Furnished by Contractor ................................................................................... 16
4.10 Additional Drawings by City....................................................................................................... 16
4.11 Lines and Grades ...................................................................................................................... 16
4.12 Record Documents.................................................................................................................... 16
4.13 Record Drawings ....................................................................................................................... 16
4.14 Reuse of Documents ................................................................................................................. 17
4.15 Subsurface Data........................................................................................................................ 17
4.16 Right-of-Way.............................................................................................................................. 17
4.17 Removal of Defective and Unauthorized Work.......................................................................... 17
4.18 Acceptance of Defective Work .................................................................................................. 17
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4.19 Submittals.................................................................................................................................. 17
4.20 Substitutions .............................................................................................................................. 18
4.21 Construction Staking Lines and Grades .................................................................................... 19
4.12 Inspection of the Work............................................................................................................... 19
4.23 Testing....................................................................................................................................... 19 SECTION 5 CHANGES IN WORK
5.01 Limited City Authority to Approve Change Orders..................................................................... 21
5.02 Contractor Liability for Unapproved Change Orders ................................................................. 21
5.03 Non-Material Change Requests by the Contractor.................................................................... 21
5.04 Effect of Extension of Time........................................................................................................ 21
5.05 Letters of Instruction .................................................................................................................. 21
5.06 Requests for Information, Inconsistencies and Changed Conditions ........................................ 21
5.07 Extra and Omitted Work ............................................................................................................ 22
5.08 Change Orders .......................................................................................................................... 22
5.09 Disputed Work ........................................................................................................................... 24 SECTION 6 CONTROL OF MATERIALS
6.01 Materials and Workmanship ...................................................................................................... 25
6.02 Protection of Work and Materials .............................................................................................. 25
6.03 Trade Names or Equals............................................................................................................. 25
6.04 Inspection of Materials by City................................................................................................... 26
6.05 Inspection of Materials by Others .............................................................................................. 26
6.06 Tests of Materials ...................................................................................................................... 26
6.07 Certification................................................................................................................................ 26
6.08 Weighing and Metering Equipment ........................................................................................... 26
6.09 Calibration of Testing Equipment .............................................................................................. 27 SECTION 7 UTILITIES
7.01 Citys Statutory Obligation ......................................................................................................... 28
7.02 Contractors Obligation to Identify and Protect Subsurface Infrastructure................................. 28
7.03 Location ..................................................................................................................................... 28
7.04 Protection .................................................................................................................................. 29
7.05 Shut Down Notification .............................................................................................................. 29
7.06 Removal .................................................................................................................................... 29
7.07 Relocation.................................................................................................................................. 29
7.08 Delays........................................................................................................................................ 30
7.09 Cooperation ............................................................................................................................... 30 SECTION 8 PROSECUTION AND PROGRESS
8.01 Notice to Proceed ...................................................................................................................... 31
8.02 Commencement of Work........................................................................................................... 31
8.03 Subcontracting........................................................................................................................... 31
8.04 Administrative Duties................................................................................................................. 31
8.05 Baseline Construction Schedule................................................................................................ 31
8.06 Three-Week Look Ahead Schedule........................................................................................... 31
8.07 Construction Sequence ............................................................................................................. 32
8.08 Recording Existing Conditions................................................................................................... 32
8.09 Preconstruction Conference ...................................................................................................... 32
8.10 Progress Meeting ...................................................................................................................... 32
8.11 Hours of Construction................................................................................................................ 32
8.12 Prosecution of Work .................................................................................................................. 32
8.13 Suspension of Work .................................................................................................................. 33
8.14 Default by the Contractor and Termination of Control ............................................................... 33
8.15 Contractors Right to Stop Work or Terminate Contract ............................................................ 34
8.16 Citys Right to Terminate Contract............................................................................................. 34
8.17 Time of Completion and Days Charged .................................................................................... 35
8.18 Liquidated Damages.................................................................................................................. 35
8.19 Delays and Extension of Time................................................................................................... 36
8.20 Substantial Completion.............................................................................................................. 38
8.21 Project Closeout ........................................................................................................................ 38
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8.22 Final Completion........................................................................................................................ 38
8.23 Final Acceptance ....................................................................................................................... 39
8.24 Risk of Loss ............................................................................................................................... 39
8.25 Use of Improvements During Construction ............................................................................... 39 SECTION 9 RESPONSIBILITIES OF THE CONTRACTOR
9.01 Contractors Responsibility for the Work ................................................................................... 40
9.02 Contractors Responsibility for Subcontracted Work ................................................................. 40
9.03 Superintendent .......................................................................................................................... 40
9.04 Character of Workers ................................................................................................................ 40
9.05 Laws to be Observed................................................................................................................. 40
9.06 Permits and Fees ...................................................................................................................... 42
9.07 Coordination and Cooperation................................................................................................... 42
9.08 Use of Premises ........................................................................................................................ 43
9.09 Construction Staging and Field Office ....................................................................................... 43
9.10 Site Security .............................................................................................................................. 44
9.11 Construction Water.................................................................................................................... 44
9.12 Project Site Maintenance........................................................................................................... 44
9.13 Preservation of Property............................................................................................................ 46
9.14 Protection of Buried Utilities ...................................................................................................... 47
9.15 Protection of Bridges ................................................................................................................. 47
9.16 Protection of Traffic Signal Facilities ......................................................................................... 47
9.17 Restoration of Adjacent and Existing Improvements................................................................. 48
9.18 Archeological Remains.............................................................................................................. 48
9.19 Access to Private Property ........................................................................................................ 48
9.20 Traffic Control and Public Convenience .................................................................................... 48
9.21 Safety ........................................................................................................................................ 51
9.22 Patent Fees or Royalties ........................................................................................................... 53
9.23 Advertising................................................................................................................................. 53
9.24 Antitrust Claims ......................................................................................................................... 53
9.25 Audit and Examination of Records ............................................................................................ 53
9.26 Notice of Entrance ..................................................................................................................... 54
9.27 Additional and Emergency Protection ....................................................................................... 54
9.28 Placing Portions of Work in Service .......................................................................................... 54
9.29 Rights of Way ............................................................................................................................ 54 SECTION 10 MEASUREMENT AND PAYMENT
10.01 Measurement of Quantities for Unit Price Work ........................................................................ 55
10.02 Bid Items.................................................................................................................................... 55
10.03 Bid Quantities ............................................................................................................................ 55
10.04 Progress Payments ................................................................................................................... 56
10.05 Retentions ................................................................................................................................. 57
10.06 Final Payment............................................................................................................................ 58
10.07 Acceptance................................................................................................................................ 59
10.08 Compensation for Extra Work Omitted...................................................................................... 59
10.09 Compensation to City for Extension of Time ............................................................................. 59
10.10 Claims........................................................................................................................................ 59
10.11 Time Limit on Claims ................................................................................................................. 59
10.12 City Response to Claims ........................................................................................................... 60
10.13 Appeal of Engineers Decision................................................................................................... 60 SECTION 11 GUARANTEE
11.01 Contractors Guarantee ............................................................................................................. 61
11.02 Correction of Defective Work During the Guarantee Period...................................................... 61 * * *
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GENERAL PROVISIONS
SECTION 1 TERMS AND DEFINITIONS
1.01 Terms Unless otherwise stated, the words directed, required, permitted, ordered, instructed, designated, considered necessary, prescribed, approved, acceptable, satisfactory, or words of like meaning, refer to actions, expressions, and prerogatives of the Engineer.
1.02 Definitions Except as amended or supplemented, whenever in the Contract Documents the following terms are used, the intent and meaning shall be interpreted as follows:
Agreement - The written contract documents between the City and the Contractor covering the performance of the work.
As Shown, As Indicated, As Detailed - Where these words or words of similar import, are used, it shall be understood that reference to the drawings accompanying these specifications is made unless stated otherwise. Where "As Directed", "As Permitted", "Approved", or words of similar import, are used, it shall be understood that the direction, requirements, permission, approval, or acceptance of the Engineer is intended unless stated otherwise. As used herein, "Provide" shall be understood to mean "Provide Complete in Place" that is, "Furnish and Install, and "Install" shall mean the installation complete in place of an item of equipment furnished by the City.
ASTM - American Society for Testing and Materials specifications.
AWWA - American Water Works Association and its Standard Specifications.
Addenda - Written or graphic instruments issued prior to the opening of bids which clarify, correct or change the bidding documents or the Contract Documents.
Bid - The offer or proposal of the bidder submitted on the prescribed forms setting forth the prices for the work to be performed.
Bid Forms - Includes the Bid Schedule, Designation of Subcontractors, Bidders Statement of Responsibility, Bidders Non-Collusion Affidavit, Bid Security, and all other information requested by the Bid Proposal Documents.
Bidder Any individual, firm, partnership, corporation, or combination thereof submitting a bid for the work, acting directly or through a duly authorized representative. After the City awards the Contract, the term Bidder shall be equivalent to the term Contractor for the purpose of identifying the Contractors rights and obligations under the Contract Documents.
Bidding Documents - The Notice Inviting Sealed Proposals, Instruction to Bidders, Bid Proposal forms and Bidders Bond.
Bonds - Bid, performance, labor and material, and warranty bonds and other instruments of security.
Change Orders A written order by the Engineer to the contractor making changes in the plans or specifications which is signed by the Contractor and City authorizing an addition, deletion or revision in the work, with possible adjustment in the contract price or the contract time, issued on or after the effective date of the Agreement. If the change involves items for which there is no contract unit price, the order shall so state and stipulate that the changes shall be performed as extra work or work omitted.
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City - The City of San Carlos acting through the City Council or any other board, body, official(s) to which or to whom the power belonging to the City Council has been properly delegated.
City Regulations - All written laws, rules, and policies established by the City, including those set forth in the General Plan, San Carlos Municipal Code, ordinances, resolutions, policies, procedures, and City design documents (including the Standard Specifications, design standards, and relevant Public Facility Master Plans).
Code The terms Government Code, Labor Code, etc., refer to codes of the State of California.
Contract See definition for Agreement.
Contract Documents - See Agreement, Section 2.1, List of Contract Documents and Precedence.
Contract Drawings or Plans - All drawings which may have been prepared by or in behalf of the City, as a basis for proposals, when duly signed and made a part of this contract by incorporation or reference, all drawings submitted in pursuance of the terms of this contract by the successful bidder with their proposal and by the contractor to the City and reviewed by the Engineer; and all drawings submitted by the Engineer to the contractor during the progress of the work as provided for herein.
Contract Price - The total amount of money for which contract is awarded and as amended.
Contract Time - The number of days or the date stated in the contract as the duration for completing work.
Contract Unit Price - The Contractors original bid for a single unit of an item of work in the proposal.
Contractor - An individual, partnership, corporation, developer, joint venture, subdivider or other legal entity entering into a contract or agreement with the City to perform the work covered by this contract, and their authorized agents or legal representatives. After the City awards the Contract, the term Contractor shall be equivalent to the term Bidder for the purpose of identifying the Contractors rights and obligations under the Contract Documents.
Day or Days - Unless herein otherwise expressly defined, shall mean a calendar day of twenty-four hours each.
Defective Work - Work that is unsatisfactory, faulty, omitted, incomplete, deficient, or does not conform to the requirements of the Contract Documents, directives of the Engineer, or requirements of any inspection, reference standard, test, or approval specified in the Contract Documents, or has been damaged prior to the Engineers recommendation of final acceptance. See General Provisions Section 6.01, Materials and Workmanship.
Directive Any document, signed by the City, with instruction to the Contractor pertaining to the completion of a project objective; including, but not limited to responses to requests for information, clarifications, letters of instruction, the notice of award and the notice to proceed.
Engineer - The Engineer duly and officially appointed by the City to represent the City and to observe the work of construction under this contract, acting personally or through agents or assistants duly authorized by the Engineer, such agents or assistants acting within the scope of the particular duties entrusted to them.
Extra Work - Performance or furnishing of work or material found necessary for the proper completion of the improvements, the payment of which is not covered by any item of the bid schedule and for which no means of payment, direct or indirect, has been provided in the contract.
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Final Completion - The point at which work has been completed in accordance with the contract documents, plans and specifications to the satisfaction of the Engineer and there are no items of work remaining to be completed. See General Provisions, Section 8.22, Final Completion.
Force Account Work Force account work is a method of compensation utilized to pay for extra work typically needed to overcome unanticipated work, resulting from the project work scope, necessary to complete the project work scope that cannot be well defined prior to the start of extra work. General Provision, Section
5.08 Change Orders establishes the specific methods of compensation for labor, materials and equipment used to perform the force account work.
Greenbook - The Standard Specifications and Plans written and promulgated by Public Works Standards, Inc., entitled Standard Specifications for Public Works Construction, and Standard Plans for Public Works Construction, current editions.
Hold Harmless - Agreement by one party to bring no claim for negligence, breach of contract, indemnity or otherwise against another party. See Agreement Section 17, Indemnification.
Inspector - The engineering or technical inspector(s) duly authorized or appointed by the Engineer or City, limited to the particular duties entrusted to them.
Liquidated Damages - The amount of dollars assessed for each and every calendar day required to complete the contract in excess of the contract time. See General Provisions, Section 8.18, Liquidated Damages.
Losses - Any and all losses, costs, liabilities, claims, damages, and expenses, including, without limitation, reasonable attorneys fees and expenses.
Manual of Uniform Traffic Control Devices (MUTCD) or California Manual of Uniform Traffic Control Devices (CAMUTCD) The latest edition of the California Manual of Uniform Traffic Control Devices.
Modification Modifications to the Agreement are executed by change orders, and may only be issued after the effective date of the contract.
Notice - Any notice allowed or required to be given by the City may be given by the Engineer.
Notice of Award The written notice by the City to the successful Bidder stating that upon completion of required conditions the City will execute the contract.
Notice to Proceed A written notice by the City to the Contractor authorizing the Contractor to proceed with the work and fixing the date on which the contract time will start.
Plans - The contract plans and/or supplemental drawings approved by the Engineer which show the location, character, dimensions and details of the work.
Project - The total construction of which the work performed under the Contract Documents may be the whole or a part and which may include construction by the City or by separate Contractors.
Proposal - The offer of a bidder when submitted on the proposal form, properly signed and guaranteed.
Reference Specifications - Those standards, rules, method of tests or analysis, codes, and specifications of other agencies, engineering societies, or industrial associations referred to in the Contract Documents. These refer to the current edition or amendments in effect at the time of advertising the project unless specifically referred to by edition, volume or date. Unless otherwise stated in the plans or specifications, the reference specification in effect shall be that edition which was in effect on the date of the Notice Inviting Bids.
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Shop Drawings - All drawings, diagrams, illustrations, schedules and other data which are specifically prepared by or for the Contractor to illustrate some portion of the work and all illustrations, brochures, standard schedules, performance charts, instructions, diagrams and other information prepared by a supplier and submitted by the Contractor to illustrate material or equipment for some portion of the work. See General Provisions, Section 4.19, Submittals.
Special Provisions - Any provisions which supplement or modify these standard specifications.
Specifications The information, directions, provisions and requirements pertaining to the work, and contained herein including Special Provisions, Technical Specification, General Provisions, those administrative subsections of Caltrans Standard Specification that are specifically referenced in this Contract and the non-administrative sections (Section 10 through 95) of the Caltrans Standard Specification dated 2010.
Standard Plans - The Standard Details of the City of San Carlos, current edition, including the Parks and Streetscape Standard Plans, current edition, identifying construction standards for the various items of work indicated and/or referred to on the plans, specifications or special provisions.
Standard Specifications - The Standard Specifications of the City of San Carlos.
Standard Specifications for Public Works Construction - The Standard Specifications for Public Works Construction, Greenbook, current edition.
State - State of California.
State Standard Plans - The Standard Plans of the Department of Transportation of the State of California, (Caltrans) Standard Plans dated 2010.
State Standard Specifications - The Standard Specifications of the Department of Transportation of the State of California Caltrans Standard Specification dated 2010.
Subcontractor - Any individual, firm or corporation having a direct contract with the Contractor or with any other Subcontractor for the performance of a part of the work at the site. Unless otherwise specifically provided, the term Subcontractor includes Subcontractor of any tier, suppliers, manufacturers and distributors.
See Section 3.07 of the General Provisions.
Substantial Completion When the work (or a specified part thereof) has progressed to the point where it is sufficiently complete and in accordance with the Contract Documents. See General Provisions, Section 8.20, Substantial Completion.
Superintendent The executive representative of the contractor responsible for the site supervision of the work at all times during progress, authorized to receive and fulfill instructions from the Engineer and to accept orders for changed and extra work.
Surety - Any individual, firm or corporation, bound with and for the Contractor for the acceptable performance and completion of the work, and the satisfaction of all obligations incurred.
Surveyor - A land surveyor licensed in the State of California.
Unbalanced Bid - See Materially Unbalanced Bid and Mathematically Unbalanced Bid.
Work - The construction and services required by the Contract Documents as amended by contract modifications, whether completed or partially completed, including all labor, materials, equipment, tools, and services provided or to be provided, by the Contractor to fulfill the Contractors obligations. The work may constitute the whole or a part of the project
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Working Day Any day except Saturday, Sunday, Holidays observed by the City, or days in which the Contractor is entitled to an excusable delay. Holidays observed by the City are: Thanksgiving, day after Thanksgiving, Christmas Day, New Years Day, Martin Luther King Jr. Day, Presidents Day, Memorial Day, Independence Day, Labor Day, and Veterans Day. See General Provisions, Section 8.19, Delays and Extension of Time. In addition, at the option of the Engineer, the contractor may be required to suspend all work and activities during the Citys annual Holiday Closure in late December and early January of each year.
No work shall be done during this suspension except such work as is necessary for the proper care and protection of work already performed, or except in case of an emergency, and in any case, only with prior written permission of the Engineer. This suspension of work will be at no cost to the City. Working days will not be assessed during this suspension of work.
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SECTION 2 PROPOSAL REQUIREMENTS AND CONDITIONS
2.01 General - Bidders may obtain complete sets of the Contract Documents, including the proposal forms to be used for bidding, at the location designated in the Notice to Bidders. Bidders shall use complete sets of Contract Documents in the preparation of bids. The City makes copies of the Contract Documents available, on the above terms, for the sole purpose of obtaining Bids for the work and does not confer a license or grant permission for any other use of the Contract Documents.
2.02 Proposal Forms The portion of the Contract Documents entitled Bid Proposal focuses the Bidders attention on the requirements for submitting a proposal, including the Notice to Bidders, and the Bid Proposal Forms.
Bids are required for the entire work described herein and shall be submitted on the blank forms prepared by the City and provided herein. The Bid Proposal submitted to the City shall consist of the completed Bid Schedule, Designation of Subcontractors, Bidders Statement of Responsibility, Bidders Non- Collusion Affidavit, Bidders Qualifications, Bidders References, Signature of Bidder, Bid Guaranty, and all other information requested by the Bid Proposal documents.
All proposals shall type or print legibly in ink the proposed prices both in writing and in figures and shall be signed, with address included, by the bidder or the bidder's authorized representative. Corrections must all be individually initialed by the Bidder. Bidder shall not modify or qualify the Bid Forms in any manner.
The Bid Forms shall be signed by a person or persons legally authorized to bind the Bidder to the Contract. The individuals signing each document shall warrant that they are authorized to bind the legal entity of the Bidder. Proposals made by individuals must show the individual's signature and post office address; if made by a firm or partnership and the signature of one or all of the partners must be shown. Proposals submitted by corporations must show the name and post office address of the corporation, the name of the state, under whose laws the corporation is chartered, and the signature and title of the person signing on behalf of the corporation.
2.03 Qualifications of Bidders - Each bidder shall be licensed as specified in the Notice to Bidders and in accordance with the provisions of Chapter 9, Division 3, of the Business and Professions Code, State of California, and shall be skilled and regularly engaged in the general class or type of work called for under this contract.
It is the intention of the City to award a contract only to a bidder who is able to furnish satisfactory evidence that they have the requisite experience and ability and that the bidder has sufficient capital, facilities and plant to enable them to prosecute the work successfully and promptly, and to complete it within the time set forth in the contract.
In determining the degree of responsibility to be credited to a bidder, the City will weigh any evidence indicating the bidder, or personnel guaranteed to be employed in responsible charge of the work, has satisfactorily performed other contracts of like nature and magnitude.
2.04 Rejection of Proposals Containing Alterations, Erasures, or Irregularities - Proposals may be rejected if they show any alterations of form, additions not called for, conditional or alternative bids, incomplete bids, irregularities of any kind, or corrections and erasures without initials by the Bidder.
2.05 Submission of Bids - All Bid Forms, including all documents required to be submitted with the Bid, shall be enclosed in a sealed opaque envelope. The envelope shall be clearly marked on its face with the Bidders name and address, and the notation SEALED BID ENCLOSED, CITY OF SAN CARLOS, with an identification of the project name and number as identified in the Notice to Bidders. If the Bid is sent by mail, the sealed envelope shall be enclosed in a separate mailing envelope. Oral, telephonic, facsimile, telegraphic, or electronically transmitted Bids are invalid and will not be accepted.
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Bids may be mailed or delivered by messenger. It is the Bidders responsibility alone to ensure that the Bid is received prior to the bid opening deadline at the place specified in the Notice to Bidders. Whether or not bids are opened exactly at the time fixed in the public notice inviting bids, any bid received after that time shall be returned unopened.
2.06 Approximate Estimate - The quantities listed in the bid schedule are approximate only, supplied as a general indication of the scope of work and to be used as a basis for comparing bids. The City does not expressly or by implication agree that the actual amount of work will correspond therewith, and reserves the right to increase or decrease the amount of any class or portion of the work, or to delete any portions of the work in their entirety, from the quantities listed on the bid schedule, as may be deemed necessary or advisable by the Engineer.
2.07 Examination of Plans, Specifications and Work Site - Bidder shall examine carefully the plans, specifications, proposal and contract forms, and the physical site of the work contemplated, regardless of if a site walk or pre-bid meeting has been scheduled by the City or not. It will be assumed that the bidder has investigated and is aware of the conditions to be encountered in carrying out the proposed work, and is fully satisfied as to the scope, character, quality, quantity and requirements of the proposed work, and the submission of a bid will be an acknowledgement of that assumption.
The bidder shall receive no additional compensation for obstacles or difficulties due to surface or subsurface conditions actually encountered. Where investigations of surface or subsurface conditions have been made by the City in respect to foundation or other structural design, and that information is shown in the plans, said information is included only for the convenience of bidders. The City assumes no responsibility whatsoever as to the sufficiency or accuracy of borings, or of the log of test borings or other investigations or tests, or of the interpretation thereof; there is no guaranty, warranty or representation, express or implied, that the conditions indicated thereby in fact exist or are representative of those existing throughout the work. Such information shall be used as a basis for bids at the bidder's own and sole risk; making such information available to bidders is not to be construed in any way as a waiver of the other provisions of this paragraph, and bidders must satisfy themselves through their own investigation as to the surface and subsurface conditions to be encountered at the site. By submitting a Proposal, the Bidder has certified that they have examined all items indicated in Section 2.07, "Examination of Plans, Specifications, and Site of the Work." Each proposal shall be enclosed in a sealed envelope and endorsed as specified in the Notice Invited Sealed Proposals. Bidders are warned the proposals containing irregularities of any kind, including erasures, omissions, conditions, alterations, or additional proposals may be rejected.
2.08 Withdrawals of Proposals - Any proposal may be withdrawn at any time prior to the time fixed in the Notice Inviting Sealed Proposals for the opening of bids, provided that a request in writing, executed by the bidder or their duly authorized representative, for the withdrawal of such bid, is filed with the City. The withdrawal will not prejudice the right of a bidder to file a new proposal.
2.09 Proposal Guaranty - Each proposal shall be accompanied by either a certified check, cashier's check, or bidder's bond of a surety company acceptable to the City in an amount not less than ten percent (10%) of the bid amount, and shall be made payable to the City.
2.10 Disqualification of Bidders - More than one proposal from an individual, firm or partnership, a corporation, or an association under the same or different names will not be considered. Reasonable grounds for believing that any bidder is interested in more than one proposal for the work will be the cause of the rejection of all proposals in which such bidder is interested. If there is a reason to believe that collusion exists among the bidders, none of the participants in such collusion will be considered. Proposals in which the prices obviously are unbalanced may be rejected.
2.11 Bid Protest Procedures Any protest of the proposed contract award shall be submitted in writing to the City Clerk no later than 5:00 p.m. on the fifth (5 th) business day following the date of the
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bid opening. If the fifth day falls on a weekend or holiday, the last day of the protest period shall be the first working day following the fifth day.
The protest must include the name, address, and telephone number of the person representing the protesting party. In addition,
(a) The party filing the protest must have submitted a bid for the Project. A Subcontractor of a party filing a bid for the project may not submit a bid protest. (b) The protest must contain a complete statement of the basis for the protest, and refer to the specific portion of the Contract Documents or the specific statute that forms the basis for the protest.
(c) The party filing the protest must concurrently transmit a copy of the protest to the proposed awardee.
Any bidders failure to fully comply with these procedures shall constitute a waiver of any right to further pursue a bid protest, including filing of a challenge of the award pursuant to the California Public Contract Code, filing of a claim pursuant to the California Government Code, or filing of any other legal proceedings.
The City shall review all timely protests prior to the award of contract. The City shall not be required to hold an administrative hearing to consider any protests, but may do so at its option. The City Council or the City Manager as designee if the authority to award the contract has already been granted by the City Council, may either reject the protest and award the project to the lowest responsible bidder or accept the protest and award the project to the next lowest responsible bidder. Nothing in this section shall be construed as a waiver of the City Councils right to reject all bids.
2.12 List of Subcontractors - In accordance with the provisions of Section 4104 of the Public Contract Code, each proposal shall list the name, address and license number of each subcontractor to whom the bidder proposes to sublet portions of the work. A subcontractor is defined as one who contracts with the contractor to furnish materials and labor, or labor only, for performance of work. Subcontractors shall be listed on the form provided in the Bid Proposal.
2.13 Required Contractor and Subcontractor Registration - In accordance with Labor Code Section 1725.5 and 1771.1, the contractor and all subcontractors shall be registered with the California Department of Industrial Relations (DIR) prior to the bid opening. All 2nd and lower tier subcontractors working on the project shall be registered with the Department of Industrial Relations prior to the work being performed. An inadvertent error in listing a subcontractor who is not registered may not be grounds for considering the bid non-responsive providing that any of the provision in Labor Code Section 1771.1(c) are satisfied.
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SECTION 3: REVIEW OF BIDS, CONTRACT AWARD AND EXECUTION
3.01 Public Bid Opening and Initial Review - Bids which have been submitted in accordance with the requirements of the Bidding Documents, and which are received on or before the bid deadline will be opened publicly, and the dollar amounts of each bid shall be read aloud.
The City shall have the right to reject all bids. The City shall have the right to reject any bid not accompanied by the required bid security or any other item required by the Bidding Documents, or a bid which is in any other way incomplete or irregular. The City shall have the right to waive irregularities in a bid, and to award the Contract to the Lowest Responsible Bidder (as determined by the City), only if the irregularities are non-material and inconsequential.
3.02 Determination of Lowest Responsible Bidder - Criteria for determining low bid in all contracts with the City involving an expenditure of $5,000.00 or more shall be determined as the Lowest Monetary Bidder on the basis of the Engineers approximate estimate of the quantities of work to be done as set forth in the Bid Schedule, in accordance with the calculation criteria set forth on the bid.
After the Lowest Monetary Bidder has been determined, the Engineer shall review that Bidders bid in order to determine whether or not that Bidder is the Lowest Responsible Bidder. The term Lowest Responsible Bidder shall mean the Lowest Monetary Bidder whose bid is responsive, and who is responsible to perform the work, as required by the Contract Documents.
The term responsive is defined by California law, but generally means that the bid has been prepared and submitted in accordance with the Bidding Requirements. The term responsible is defined by California law, but generally means that the Bidder is able to demonstrate that it possesses: (1) the capacity to perform the work required by the Contract Documents with respect to financial strength, resources available, and experience; and (2) the integrity and trustworthiness to complete performance of the work in accordance with the Contract Documents.
The City will make its determination of responsibility based upon information submitted by Bidders contained in the Bidders Qualifications and Bidders References included in the Bid Forms and, if necessary, through interviews with previous cities, clients, design professionals, or subcontractors with whom the Bidder has worked. In determining whether or not a Bidder is responsible, the City may consider the following factors in relation to the work to be performed for this Project:
(a) Demonstrated financial strength including, but not limited to, resources available, bonding capacity, and available insurance.
(b) Demonstrated safety record including, but not limited to, Experience Modification Rate. (c) Successful completion of projects of similar scope and size. In reviewing this factor, the City may consider elements including, but not limited to, contract amount of completed projects, experience on public works projects, experience implementing prevailing wage certified payroll requirements, timeliness of performance and, if necessary, evaluation of the Bidders work by previous cities, clients, design professionals, or subcontractors. (d) Sufficiency of contract administration and construction management systems including, but not limited to, proposed scheduling tools, proposed subcontract forms, proposed progress payment applications, and proposed certification of payroll documents. (e) History of claims, litigation, termination or disqualification from projects.
If the Engineer finds that the Lowest Monetary Bidder submitted a responsive Bid and that the Bidder is responsible, then that Bidder shall be deemed the apparent Lowest Responsible Bidder, and the Engineer shall report the findings to the City Council.
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If the Engineer finds that the Lowest Monetary Bidders bid is not responsive, or that the Lowest Monetary Bidder is not responsible, then the Engineer may review the responsiveness and responsibility of the next Lowest Monetary Bidder. If the Engineer finds that the next Lowest Monetary Bidder is responsive and responsible, then that next lowest Bidder shall be deemed the apparent Lowest Responsible Bidder, and Engineer shall report its findings as recommendations to the City Council. This process may continue until the Engineer finds the Lowest Monetary Bidder which is also responsive and responsible.
In the event that one or more Low Monetary Bidders are found by the Engineer to be non-responsive or non-responsible, those Bidders will be given notice and a reasonable opportunity to present additional relevant evidence to the Engineer for consideration, within five (5) working days after the Bidder receives the notice.
All findings by the Engineer shall be reported as recommendations to the City Council. The City Council reserves the right to reject any or all Bids, and to waive any irregularity. No Bid shall be binding upon the City until after the Agreement is signed by both the Contractor and the City. If the City Council determines that it is in the Citys best interest to award the Agreement, a Notice of Award shall be sent to the Lowest Responsible Bidder as determined by the City Council. The City Councils decision shall be final.
The City may investigate the responsibility and qualifications of all Bidders to whom the award is contemplated for a period not to exceed ninety (90) calendar days after the Bid opening, during which time no bid shall be withdrawn by the Bidders. The ninety (90) day review period may be extended upon the written request by the Engineer and written approval by the affected Bidder.
3.03 Notice of Award Should the City decide to proceed with the award of contract the City shall issue a Notice of Award to the lowest responsible bidder.
3.04 Contract Execution - Within fifteen (15) calendar days after receipt of the Notice of Award, the bidder shall submit to the City two (2) originals of the signed agreement, the required contract bonds and certificates of insurance. If the bidder fails or refuses to enter into a contract to do the work, then the proposal guaranty accompanying the bid shall be forfeited to the City. After the Bidder has properly submitted these documents, the City will execute the Agreement and issue a Notice to Proceed.
3.05 Status of Contractor - The right of general supervision by the City shall not make the contractor an agent of the City, and the liability of the contractor for all damages to persons or to public or private property arising from the contractor's execution of the work shall not be lessened because of such general supervision.
3.06 Assignment - No agreement or portion thereof maybe assigned without consent of the Council, except that the Contractor may assign money due which will accrue to them under the Agreement. If given written notice, such assignment will be recognized by the City to the extent permitted by law, but any assignment of money shall be subject to all proper setoffs and withholdings in favor of the City and to all deductions provided for in the Agreement. All money withheld, whether assigned or not, shall be subject to being used by the City for completion of the work, should the Contractor be in default.
Any attempt to assign or delegate the Agreement without the written consent of the City shall be void and of no force and effect. Consent by the City to one assignment shall not be deemed to be consent to any subsequent assignment.
3.07 Recognition of Subcontractors - No subcontractors will be recognized as such, and all persons engaged in the work of construction will be considered as employees of the contractor and their work shall be subject to the provisions of the contract, including specifically these general stipulations, the specifications and the contract drawings.
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3.08 Return of Bid Security - Within ten (10) working days after the execution of the Agreement, the City will return the proposal guarantees accompanying the proposals that are not to be considered in making the award. All other proposal guarantees will be held until the Agreement has been fully executed, after which, they will be returned to the respective bidders whose proposals they accompanied.
3.09 Forfeiture of Proposal Guaranty - If Bidder does not properly execute the contract and submit the acceptable bonds, insurance and certifications within the specified time; this shall be just cause for the annulment of the award and the forfeiture of the proposal guaranty to the City. The City may then award the contract to next Lowest Responsible Bidder. The forfeited proposal guaranty may be utilized by the City in accordance with Public Contract Code, Sections 20170 through 20174.
3.10 Contract Bonds - Before execution of the contract by the City, the Contractor shall file with the City surety bonds satisfactory to the City in the amounts, and for the purposes, noted below. Said bond shall be on the form furnished by the City herein.
(a) Performance Bond - The contractor shall furnish and bear the cost of a bond of a surety company acceptable to the City, which bond is conditioned upon the faithful performance of all covenants and stipulations under this contract within the time prescribed, in a manner satisfactory to the City, and that all materials and workmanship will be free from original or developed defects. The amount of the bond shall be one hundred percent (100%) of the total contract price; as such sum is set forth in the agreement.
Said bond shall be on the form furnished by the City herein.
As a condition precedent to satisfactory completion of this contract, an amount equal to ten percent (10%) of the estimated contract cost shall hold good for the period specified in said bond after completion and acceptance of the work by the City. (b) Labor and Material Bond The contractor shall furnish and bear the cost of a bond of a surety company acceptable to the City in the sum not less than one hundred percent (100%) of the total contract price, as such sum is set forth in the agreement, for the payment in full of all persons, companies, or corporations who perform labor upon or furnish materials to be used in the work under this contract, in accordance with the provisions of Section 4200 to 4208, inclusive (Chapter 3, Division 5), of the Government Code of the State of California, and any acts amendatory thereof. The bond shall be maintained by the Contractor in full force and effect until the work is accepted by the City and until all claims for materials and labor are paid.
Said bond shall be on the form furnished by the City herein. (c) Warranty Bond - The Contractor shall furnish a warranty bond in the amount of ten percent (10%) of the final contract price (total cost including change orders) to guaranty his work for two (2) years after acceptance of the work by the City Council.
Bonds shall be duly executed by a responsible corporate Surety, licensed and authorized to issue such bonds in the State of California and secured through an authorized agent with an office in California. Each bond shall be signed by both the Contractor and Surety and the signature of the authorized agent of the Surety shall be notarized.
The Contractor shall pay all bond premiums, costs and incidentals. Should any bond become insufficient due to an increase in the contract amount, the Contractor shall obtain supplemental bonding within ten (10) days.
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Should any Surety at any time be unsatisfactory to the City, notice will be given the Contractor to that effect. No further payments shall be deemed due or will be made under the Agreement until a new Surety shall qualify and be accepted by the City.
Changes in the work, or extensions of time, made pursuant to the Agreement, shall in no way release the Contractor or Surety from their obligations. The requirement for notifying the Surety of such changes or extensions shall be waived by the Surety.
3.11 Notification of Surety Companies - The surety companies shall familiarize themselves with all conditions and provisions of this contract and they waive the right of special notification of any change or modification of this contract or of extension of time, or of decreased or increased work, or of the cancellation of the contract, or of any other act(s) by the City or City's authorized agents, under the terms of this contract, and failure to so notify the aforesaid surety companies of changes shall in no wise relieve the surety companies of their obligation under this contract.
3.12 Power of Attorney - Attorneys-in-fact who sign bid bonds or contract bonds must file a certified and effectively dated copy of their Power of Attorney with each bond.
3.13 Insurance Requirements - Contractor shall provide at their own cost and expense from contract award date to acceptance of the work covered by the contract:
(a) Workmen's Compensation and Employer's Liability Insurance of not less than the amount shown in the Special Provisions for all of their employees to be engaged in the work under this contract. Should any such work be sublet, the contractor shall require each of their subcontractors at any tier similarly to provide Workmen's Compensation and Employer's Liability Insurance, all in strict compliance with Federal and State laws. (b) Personal Injury, Bodily Injury and Property Damage Liability Insurance (including automobiles, products and/or completed operations coverage) and Aircraft and Watercraft Bodily Injury Liability and Property Damage Liability Insurance if contractor uses owned or non-owned water aircraft in their operation, with Personal Injury and Bodily Injury (including death resulting therefrom) of not less than a combined Personal Injury and Property Damage Liability limit of not less than the amount shown in the Special Provisions. Should any work covered by the contract be sublet contractor shall require each of their subcontractors of any tier similarly to provide the aforesaid coverages.
(c) All Risk (excluding Earthquake and Flood) Builder's Risk Insurance in an amount not less than the value of any work under this contract, except for buried pipelines and appurtenances which need not be included in the insurance value. Under the policies of insurance described above, each policy shall contain the provision for thirty (30) days written notice submitted by registered mail from the insurance carrier(s) to the City prior to cancellation or reduction in coverage.
3.14 Special Requirements - Under the policy of insurance described in Section 13.13-b, the policy shall contain the following provisions:
(a) The City and the City's officers, representatives, agents and employees shall be named as additional insureds.
(b) Endorsement providing that such insurance is primary insurance and no insurance of the additional insureds shall be called on to contribute to a loss. (c) Endorsement providing that such insurance shall not contain any exclusion regarding loss or damage to property caused by explosion or resulting from collapse of buildings or structures or damage to property underground, commonly referred to as "XCU" hazards.
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(d) Standard cross-liability clause covering personal injury, bodily injury (including death resulting therefrom), and property damage.
3.15 Builders Risk Insurance - Under the policy of insurance, the policy shall contain the following provisions:
(a) The City shall be included as insured.
(b) Losses shall be payable to the contractor and City as their interest may appear. (c) Deductible amounts of all losses covered by insurance shall be borne by the contractor.
3.16 Certificates - Prior to beginning work, contractor shall furnish certificates satisfactory to the City as to contents and carriers of such insurance.
3.17 Legal Address of Contractor - Contractor's address as shown in the proposal, as well as such office or headquarters the contractor establishes at the site of work, hereby are designated as addresses to which drawings, samples, notices, letters, articles, or other communications to the contractor may be mailed or delivered. The delivery at either of these places of any item or communication from the City or agents thereof to the contractor shall be deemed sufficient service of such delivery. Contractor's address as shown in the proposal may be changed at any time by notice in writing from the contractor to the City. Nothing herein contained shall be deemed to preclude or render inoperative the service of any drawing, sample, notice, letter, or other article of communication to or upon the contractor personally.
3.18 Office of Contractor at Site - During the performance of the contract, Contractor shall maintain a suitable office at the site of work which shall be the headquarters of a representative authorized to receive drawings, instructions or other communications or articles from the City or City's agents; any such thing given to said representative or delivered at the contractor's office at the site of work in when absent shall be deemed to have been given to the contractor. Contractor shall maintain a complete set of plans and specifications at the site office whenever work is in progress.
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SECTION 4 - SCOPE AND CONTROL OF WORK
4.01 Work to be Done The work to be done consists of furnishing all labor, materials, tools, equipment and services necessary to complete the project, as further described in the Notice to Bidders of these Specifications, and as necessary to leave the site in a neat and finished condition with all equipment properly installed and working to the satisfaction of the Engineer.
While the City has endeavored to accurately represent in the plans and specifications the physical conditions which may affect the cost of the proposed work, the City does not warrant the completeness or accuracy of such information. It is the Contractors responsibility to ascertain the existence of any such conditions affecting the cost of the work, which would have been disclosed by reasonable examination of the site.
Conclusions pertaining to any test, investigation, statement or estimate of fact incorporated in the plans and specifications shall be considered by the Contractor to be a recommendation only. The Contractor may request equal access to the underlying or background information to arrive at an independent opinion thereon, including thedetermination of how reliable might be any conclusion appearing in (or inferred from) the information. The Contractor may not rely upon record drawings or similar final or accepted drawings or maps constructed on public or private property. Such information may be used for reference only. Actual locations and depths shall be determined by field investigations by the Contractor.
No oral or telephonic agreement or conversation with any officer, agent, or employee of the City or the Engineer, either before or after execution of the contract, shall affect or modify any of the terms or obligations contained in any of the contract documents.
4.02 Plans and Specifications - It is the intent of the Plans and Specifications to describe a functionally complete project (or part thereof) to be constructed in accordance with the Contract Documents.
For convenience, the Specifications are arranged in several sections, but such separation shall not be considered as the limits of the work required by any separate trade. The terms and conditions of such limitations are wholly between the Contractor and the project subcontractors. In general, the Special Provisions, General Provisions, and other sections of the specifications indicate the responsibilities of the Contractor and the quality of material and methods of workmanship. The plans indicate dimensions, quantities, positions, and various other details of construction.
Any work, materials or equipment that may be reasonably inferred from the Contract Documents as being required to produce the intended result shall be supplied whether or not specifically called for. When words, which have a well-known technical or trade meaning, are used to describe the work, materials or equipment, such words shall be interpreted in accordance with that meaning. See General Provisions, Section
6.03, Trade Names or Equals.
Subheadings and titles printed on the drawings in these General Provisions, in the specifications, and elsewhere in the contract documents, are inserted for the convenience of reference only, and shall not be taken or considered as having any bearing on the interpretation thereof.
4.03 References to Standards and Codes - Reference to standard specifications, manuals or codes of any technical society, organization or association, or to the Laws or Regulations of any governmental authority, whether such reference be specific or by implication, shall mean the latest standard specification, manual, code or Laws or Regulations in effect at the time of the opening of bids (or, on the Effective Date of the Agreement if there were no bids), except as may be otherwise specifically stated. However, no provisions of any referenced standard specifications, manual or code (whether or not specifically incorporated by reference in the Contract Documents) shall be effective to change the duties and responsibilities of City, Contractor or Engineer, or any of their consultants, agents or employees, from those set forth in the Contract Documents, nor shall it be effective to assign to the Engineer, or any of the Engineers Consultants, agents or employees, any duty or authority to supervise
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or direct the furnishing or performance of the work or any duty or authority to undertake responsibility for the Contractor.
4.04 Authority of the Engineer The City has the final authority in all matters affecting the work.
Within the scope of the Agreement, the Engineer has the authority to enforce compliance with the Plans and Specifications and the Contractor shall promptly comply with instructions from the Engineer. The decision of the Engineer is final and binding on all questions relating to: quantities; acceptability of materials furnished and work performed; equipment; work execution, rate of progress or sequence of work; and interpretation of the Plans, Specifications, or other drawings. This shall be precedent to any payment under the Agreement, unless otherwise ordered by the City.
4.05 Contract Documents and Precedence - The Contract Documents consist of the documents listed below, in order of precedence. If there is a conflict between component parts of the Contract Documents, the document highest in precedence controls.
(a) Change Orders.
(b) Project Directives.
(c) Permits issued by other agencies.
(d) Permits issued by the City.
(e) Agreement and required agreement forms Bid Bond, Faithful Performance and Labor and Materials Bonds, Warranty Bond, Insurance Endorsements, Workers Compensation Certification.
(f) Project Specifications, in the following order - Addenda, Bid Proposal including all Bid Proposal Forms, Notice Inviting Sealed Proposals, Special Provisions, Technical Provisions, Exhibits to the Proposal, and General Provisions.
(g) Project Plans and Drawings.
(h) City Standard Specifications.
(i) City Standard Plans.
(j) Reference Specifications, in the following order State of California Department of Transportation (Caltrans) State Standard Specifications (current edition), Standard Specifications for Public Works Construction Greenbook. (k) Reference Plans, in the following order State of California Department of Transportation (Caltrans) State Standard Plans (2010 edition), Standard Plans for Public Works Construction (2010 edition).
All of the individual components of the Contract Documents are intended to be complementary and what is required by one shall be binding as if required by all. Interpretation of a disputed meaning or intent of the plans and specifications shall be made initially by the Engineer in accordance with the application of the order of precedence. Any final decision required regarding precedence and the clarification of discrepancies in the Contract Documents shall be made by the Engineer.
4.06 Interpretation of Specifications and Drawings - The specifications and the contract drawings are intended to be explanatory of each other. Any work indicated in the contract drawings and not in the specifications, or vice versa, is to be executed as if indicated in both. Should it appear that the work to be done, or any of the matters relative thereto are not sufficiently detailed or explained in these contract documents, including the contract drawings, the contractor shall apply in writing to the Engineer for such further explanations as may be necessary and shall conform thereto as part of this contract so far as may be consist with the terms of the contract. Should any doubt or question arise respecting the true meaning of the specification, the Engineer shall make the final decision.
4.07 Figured Dimensions - Figured dimensions on the contract drawings shall in all cases be given precedence over scaled dimensions. If figured dimensions do not correspond to scaled
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dimensions, contractor shall request Engineer to verify the accuracy of the figured dimensions. It shall be the responsibility of the contractor to ascertain the correct scale of all contract drawings that are in possession, including those which may have been reduced for reproduction.
4.08 Errors or Discrepancies - If the contractor, in the course of the work, discovers any discrepancies between the drawings and the conditions of the ground, or any errors or omissions in the drawings or in the layout given by stakes, points or instructions, shall have the duty to inform the Engineer immediately in writing, and the Engineer shall promptly verify the same. Any work done after such discovery, until authorized, will be done at the contractors risk.
4.09 Drawings to be Furnished by Contractor - As soon as practical after the execution of this contract, the contractor shall supply drawings of devices to be furnished hereunder as are called for herein or as are required by the Engineer to make clear the details of construction and to demonstrate fully that all materials and equipment comply with the intent and provisions of this contract. Unless otherwise herein specified, such drawings shall be submitted to the Engineer for review. Should the Engineer take exception with any drawings furnished by the contractor, the contractor shall make the revisions required, and resubmit them to the Engineer for review. After a satisfactory review by the Engineer, these drawings shall become a part of this contract and the work shall be done in conformity therewith. No such work shall be begun or devices purchased until the review of the drawings detailing such items have been completed. The review of the drawings shall not relieve the contractor of responsibility, or waive or modify any of the provisions or requirements of this contract.
The Engineer's review of drawings submitted by the contractor will be for, and will cover, only generally conformity to the plans and specifications and will not constitute a blanket approval of all dimensions, quantities and details of the material or equipment shown by (nor shall review relieve the contractor of responsibility for errors contained in) such drawings.
All shop drawings submitted by the various subcontractors which require review of the City's representative shall first be sent to the contractor who shall keep a record of the drawing numbers and the date of their receipt.. Contractor shall submit the drawings to City's representative for review in time to prevent delays in delivery of materials.
Contractor shall thoroughly check all such shop drawings for measurements, size of member, materials and details to make sure they conform to the intent of the plans and specifications. Drawings found to be inaccurate or otherwise in error shall be returned by the contractor to the subcontractor for correction before they are submitted by the contractor to the City's representative for review.
4.10 Additional Drawings by City - Contract drawings are intended to be comprehensive and to indicate in detail the scope of the work. However, the Engineer may furnish the contractor additional drawings during the progress of the work in order to clarify and define in greater detail the intent of the contract drawings or specifications. Contractor may request such detailed drawings by submitting a request in writing to the Engineer at least two (2) weeks in advance of the time they are required.
4.11 Lines and Grades - All work under this contract shall be constructed to the lines, grades and elevations shown on the contract drawings. Contractor shall establish the lines, grades and elevations unless it is otherwise specified in the Special Provisions.
4.12 Record Documents The Contractor shall keep at the worksite a record copy of all Drawings, Specifications, Addenda, Written Amendments, Change Orders, Work Directives, Field Orders and written interpretations and clarifications. These record documents together with all approved submittals, samples and shop drawings will be available to the Engineer as a reference at all times. Upon completion of the work, these record documents will be delivered to Engineer.
4.13 Record Drawings The Contractor shall prepare and update a mas ter as-built set of red ink- lined plans, to be reviewed and approved by the Eng ineer at the end of every month. Drawings shall co ntain information showing where actual installation diffe rs from that shown on the original drawings, where
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underground or concealed features are found noting alignment (to 0.25) and elevation (to 0.1 ), field changes or deletions of work, and any additional work by chang e order. Upon the projects completion, and prior to the projects acceptance, the Contractor shall submit to the City the completed as-built record Drawings on one (1) set of full size prints prepared on 22" x 34" paper.
Record Drawings are full size drawings (Plans) which marked up during construction to delineate the actual in-place constructed conditions. Record Drawings shall be provided by the Contractor for this Project.
Requirements for Record Drawings as specified elsewhere shall supplement the requirements specified herein.
4.14 Reuse of Documents - Neither the Contractor nor any Subcontractor or supplier or other person or organization performing or furnishing any of the work under a direct or indirect agreement with the City shall have any title or rights to any of the Drawings, Specifications or other documents (or copies thereof) which bear the seal of the design engineer. Such documents shall not be reused on extensions of the project or for any other project without written consent of the City and the design engineer.
4.15 Subsurface Data If completed, all soil and soil test data, water table elevations, and soil analyses included or referred to in the Contract Documents apply only at the location of the test holes and to the depths indicated. If completed, soil test reports for test holes which have been drilled are available for inspection at the office of the Engineer. Any additional subsurface exploration shall be done by Bidders or the Contractor at their own expense.
The elevation of the water table indicated by soil test reports is that which existed on the date the test hole was drilled. It is the Contractors responsibility to determine and allow for the possibility of differing ground water elevations on the date of the projects construction. A difference in elevation between ground water shown in soil boring logs and ground water actually encountered during construction will not be considered as a basis for extra work.
4.16 Right-of-Way Acquisition of right-of-way or permanent easements necessary for the improvements as shown on the plans will be provided by the City. Unless otherwise provided, the Contractor shall make any required arrangements, pay for, and assume all responsibility for acquiring, using, and disposing of additional work areas, easements, and temporary facilities required. Contractor shall identify and hold the City harmless from all claims for damages resulting from such actions.
4.17 Removal of Defective and Unauthorized Work - Should the Contractor deliberately proceed with any portion or phase of construction which is obviously incorrectly indicated in the contract plans or documents, he shall be responsible for any corrective measures required to make adequate repairs or adjustment. This shall include any work done beyond the lines and grades shown on the plans or established by the Engineer, or any extra work done without written authority.
All work that has been rejected shall be remedied or removed and replaced by the Contractor in an acceptable manner and no compensation will be allowed for such removal or replacement. If the Contractor fails to remedy rejected work within ten (10) working days after written demand, the City may, without prejudice to other remedies, sell such materials at auction or at private sale, or otherwise dispose of such material. The Contractor shall be entitled to the proceeds of such sale, if any, in excess of the costs and damages for which the Contractor is liable to the City, including reasonable attorneys fees and expenses and compensation for the Citys services and expenses.
4.18 Acceptance of Defective Work - The City shall have the option, at its sole discretion and by written notice to the Contractor, to accept defective work instead of requiring its removal or correction, in which case the contract sum shall be reduced by an amount equal to the difference between the value to the City such work would have were it complete, correct, and in conformity with the Contract Documents and the value to the City of such defective work. Such option shall be exercised solely by written notice to the Contractor and shall not be implied from any act or omission by the City or the Engineer. If the remaining payments and retention are insufficient to cover the amount of the reduction of the contract sum, the Contractor shall promptly pay to the City the amount of any such deficiency.
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4.19 Submittals - Within ten (10) working days following the Notice to Proceed, the Contractor shall provide a detailed list for review and approval of all individual submittals required to be submitted under the contract. The list shall reference the specification section and paragraph that requires the submittal along with the date the Contractor plans to transmit the submittal to the City for review.
Unless otherwise requested by the Engineer, submittals shall be provided electronically in .pdf format at least twenty-eight (28) calendar days prior to the approval being necessary for the work. Submittals shall be transmitted with a Submittal Cover Letter form as approved by the Engineer. Large submittals consisting of reports, oversized or colored pages, full sized shop drawings, manuals contained in binders, or submittals in other forms not easily reproduced shall be provided in hard copy format with six (6) copies.
For items requiring shop drawings, no materials shall be furnished, and no work shall be performed, until the drawings have been favorably reviewed. Shop drawings shall be of a size and scale to clearly show all necessary details.
After review by the City of each of the Contractor's submittals, the material will be returned to the Contractor marked with actions defined as follows:
(a) NO EXCEPTIONS TAKEN - Accepted subject to its compatibility with future submissions and additional partial submissions for portions of the work not covered in this submission. Does not constitute acceptance of deletion of specified or required items not shown in a partial submission.
(b) MAKE CORRECTIONS NOTED - The same as item (a), except that minor corrections as noted by the City shall be made by the Contractor. No resubmission is required. (c) REVISE AND RESUBMIT - Rejected because of major inconsistencies or errors which shall be resolved or corrected by the Contractor prior to subsequent review by the City. (d) REJECTED - Submitted material does not conform to plans and Specifications in major respects. This material is not expected to be resubmitted. (e) SUBMIT SPECIFIED ITEM - Submittals not reviewed by the City but received for record purposes.
Favorable review of the shop drawings by the Engineer is interpreted to mean that there is substantial and acceptable conformance with the contract plans, but details of design may not necessarily be checked for adequacy or accuracy. Such acceptance shall not relieve the Contractor from the responsibility for errors or omissions in the shop drawings or from deviations from the contract documents unless such errors, omissions, or deviations were specifically called to the attention of the Engineer in writing. The Contractor shall be responsible for the correctness of the shop drawings, for shop fits and field corrections, and for the results obtained by the use of such plans.
4.20 Substitutions Proposed requests by the Contractor for changes in products, materials, equipment, and methods of construction required under the Contract Documents after the award of contract are considered "requests for substitutions. For proposed or equal substitutions, attention is directed to General Provision Section 6.03, Trade Names or Equals.
Each request for substitution shall be prepared and presented to the City in accordance with the procedures for submittals, except that the following additional information shall be provided. (a) An explanation of the advantages to the City for accepting the substitution. (b) A comparison of significant qualities of the proposed substitution with those specified. (c) A list of changes or modifications needed to other parts of the work and to construction performed by the City and separate Contractors, that will be necessary to accommodate the proposed substitution.
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(d) A statement indicating the substitution's effect on the Construction Schedule compared to the Baseline Construction Schedule without acceptance of the substitution. Indicate the effect of the proposed substitution on overall contract time.
(e) Cost information, including a proposal of the net change, if any, in the Contract Sum. (f) Certification that the substitution is equal to or better in every respect to that required by Contract Documents, and that it will perform adequately in application indicated. Include Contractor's waiver of rights to additional payment or time extensions, that may be necessary because of the substitution's failure to perform adequately.
No extension of time will be allowed through failure of the Contractor to either transmit requests for substitution sufficiently in advance of the work, or on account of processing time outside the time limits noted.
4.21 Construction Staking Lines and Grades - Unless otherwise stated in the Special Provisions, the Contractor shall provide, preserve, and replace if necessary, all of the necessary construction stakes required for the construction of the project. Grades for underground conduits will be set on the ground surface and shall then be transferred to the bottom of the trench by the Contractor.
Stakes or marks will be set by a California Licensed Surveyor or a California Registered Civil Engineer to establish the lines and grades required for the completion of the work as specified in the Contract Documents. It shall be the Contractor's responsibility to notify the Engineer of any discrepancies found between field grades and notes shown within the Contract Documents.
Contractor shall furnish horizontal control and cut sheets to the Engineer immediately upon the setting of construction or boundary markers. Upon completion, all work shall conform to the lines, elevations, and grades shown on the plans.
4.22 Inspection of the Work - All work is subject to inspection and approval of the Engineer.
Unless otherwise stated in the specifications, the City shall perform all required inspections. The Contractor shall notify the Engineer before noon of the working day before inspection is required. Unless otherwise authorized, work shall be done only in the presence of the Engineer. Any work done without proper inspection will be subject to rejection. The Engineer shall at all times have access to the work during its construction at shops and yards as well as the project site. The Contractor shall provide every reasonable facility for ascertaining that the materials and workmanship are in accordance with the Contract Documents. Inspection of the work shall not relieve the Contractor of the obligation to fulfill all conditions of the contract.
If a portion of the work is covered contrary to the Engineers request or direction, or contrary to the requirements of the Contract Documents, it must, if required in writing by the Engineer, be uncovered for the Engineers observation and be replaced at Contractors expense without adjustment of the contract time or the contract sum.
If a portion of the work has been covered, which is not required by the Contract Documents to be observed or inspected prior to its being covered and which the Engineer has not specifically requested to observe prior to its being covered, the Engineer may request to see such work and it shall be uncovered and replaced by Contractor. If such work is in accordance with the Contract Documents, the costs of uncovering and replacing the work shall be added to the contract sum by change order; and if the uncovering and replacing of the work extends the contract time, an appropriate adjustment of the contract time shall be made by change order. If such work is not in accordance with the Contract Documents, the Contractor shall pay such costs and shall not be entitled to an adjustment of the contract time or the contract sum.
Regular working hours for City Construction Inspectors are between 7:30 a.m. and 4:00 p.m., Monday through Friday, excluding City holidays. If the Contractor works outside these times, the Contractor may be charged for additional inspection. Inspection by the Engineer or by a City inspector, or
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any order measurement, approved modifications, certificate or payment of money, or acceptance of any part of whole of the work, or any extension of time, or any possession by the City or its agents, shall not operate as a waiver for any provision of this contract or of any power reserved therein to the City, or any right to damage thereunder; no breach of this contract shall be held to a waiver of any or subsequent breach. All remedies shall be taken and construed as cumulative.
4.23 Testing - Unless otherwise stated in the Contract Docum ents, all required testing will either be performed directly by an independent laboratory coordinated and paid for by the Contractor. The Contractor shall submit the resulting certified test results and Cer tificates of Compliance for all materials requiring such as specified in the Technical Provision. Contractor s hall cooperate with the City in coordinating the ne cessary testing. The coordination of testing, including the number and location of tests, shall be under the direction of the Engineer. All compaction test sites deeper than five (5) feet below grade shall be properly shored by the Contractor to protect testing personnel.
The cost for performing re-tests due to failures, or additional call-outs if work is not ready to test, will be charged to the Contractor. The City shall require retesting until all required tests are successfully passed.
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SECTION 5 CHANGES IN WORK
5.01 Limited City Authority to Approve Change Orders - The Contractor recognizes that the City is a public agency and that it can only act through its duly authorized agents. In this regard, the Contractor agrees that only written change orders, executed by the governing body of the City, shall be valid. The Engineer shall have no authority to issue a change order unless so specifically authorized, and no person shall have authority to issue any oral change order.
5.02 Contractor Liability for Unapproved Change Orders - Unless a valid change order is issued, all changes in the work performed by the Contractor shall be at the Contractors own risk, and shall not be entitled to any additional compensation. Furthermore, the Contractor may be required to make the work conform to the plans and specifications. No act or series of acts by the City during the course of the contract shall be deemed to constitute a waiver of the Citys right to rely upon the provisions of this Section 5, Changes in Work.
5.03 Non-Material Change Requests by the Contractor - Changes in the plans and specifications requested in writing by the Contractor, which do not materially affect the work and which are not detrimental to the work or to the interests of the City, may be granted to facilitate the work, when approved in writing by the Engineer. If such changes are granted, they shall be made at a reduction in cost or at no additional cost to the City. Nothing herein shall be construed as granting a right to the Contractor to demand acceptance of such changes or to increase the contract sum or contract time as a result of the proposed change.
5.04 Effect of Extension of Time - The granting of any extension of time due to delays which, in the judgment of the City, are unavoidable delays shall in no way operate as a waiver on the part of the City of its rights under this contract.
5.05 Letters of Instruction - The Engineer may issue letters of instruction in the form of Field Orders, Clarifications, responses to Requests for Information, or any other document which makes interpretations or clarifications to the Contract Documents that do not modify the scope of work or involve an adjustment in the contract sum or contract time. Letters of Instruction shall be binding upon the Contractor, and the Contractor shall promptly carry out the requirements of such Letters of Instruction.
5.06 Requests for Information, Inconsistencies and Changed Conditions - Before undertaking each part of the work, the Contractor shall carefully study all pertinent figures shown in the Contract Documents and verify that all applicable field measurements are free of conflicts, errors, discrepancies, inconsistencies and omissions. If such conditions are discovered, the Contractor shall notify the Engineer by writing a Request for Information, and await direction from the Engineer before proceeding.
If the Contractor encounters a changed condition, as defined by one or more of the conditions below, the Contractor shall notify the Engineer by writing a Request for Information before disturbing the condition further.
(a) Material differing from that represented in the Contract which the Contractor believes may be hazardous waste, as defined by Health and Safety Code, Section 25117 that is required to be removed to a Class I, Class II, or Class III disposal site in accordance with provision of existing law; and
(b) Subsurface or latent physical conditions at the site differing materially from those represented in the Contract Documents; and
(c) Unknown physical conditions at the site of any unusual nature, which differ materially from those ordinarily encountered and generally recognized as inherent in the work and of the character provided for in the Contract Documents.
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No extension of Contract time shall be made by the City due to the Contractors failure to provide a timely written notice of any inconsistency or changed condition requiring direction. The Engineer will respond to the Contractors Request for Information within three working days, providing an interpretation, clarification or change order for an appropriate adjustment in contract time and cost pursuant to General Provisions, Section
5.07, and Change Orders. Contractor shall wait for the Engineers written response to a Request for Information before proceeding with any work.
The Contractor shall not be liable to the City for failure to report any conflict, error, or discrepancy in the Contract Documents, unless the Contractor had actual knowledge or could foresee such conditions as may be discovered by a reasonable examination of the work site or materials. If the Contractor performs any construction activity in which he knows or should know involves an error, inconsistency, ambiguity, or omission referred to in this Section, without notifying and obtaining the written consent of the Engineer, Contractor shall be responsible for the resultant costs, including, without limitation, the costs of correcting defective work.
However, in an emergency affecting the safety of persons or property, the Contractor shall take all reasonably necessary precautions to prevent or minimize damage, injury, or loss.
5.07 Extra and Omitted Work - Whenever corrections, alterations or modifications of the work under this contract are ordered and approved by the Engineer and increase the amount of work to be done, such added work shall be known as Extra Work. When such corrections, alterations or modifications decrease the amount of work to be done, such deleted work shall be known as Omitted Work. The General and Special Provisions shall apply with equal force to all extra and omitted work.
When the Contractor considers that any changes ordered involve extra or omitted work, Contractor shall immediately notify the Engineer in writing and subsequently keep them informed as to when and where the alleged extra work is to be performed.
When extra work reports are agreed upon and signed by both parties, they shall become the basis of payment. When extra work is still under negotiation or has not been agreed upon, the Contractor shall keep daily detailed and accurate records itemizing each element of cost and shall provide certified payroll, invoices, and other substantiating records and documentation with records and/or claims for compensation to be provided no later than 30 days following the time in which the work claiming to be extra was performed.
Unless notification of extra work is documented, and unless a complete statement of materials used and expenses incurred is furnished by the Contractor, the Contractor shall not be entitled to payment of such alleged extra work, and any future claims for compensation will be invalid.
Payment for extra work shall be in accordance with General Provisions, Section 5.08 - Change Orders. Omitted work shall not constitute a claim for damages on account of anticipated profits on the work that may be omitted.
5.08 Change Orders At any time during the progress of the work, and without in any way rendering void the Agreement, the City may order alterations, additions or deductions from the work by change order, without notice to sureties. When so ordered in writing, the Contractor shall proceed with work as directed by the change order.
The change order shall describe the change in the work, the adjustment of the contract sum (if any), and the adjustment of the contract time (if any). The Contractor shall not be entitled to any extension of time for the completion of the work by virtue of any change order unless the change order specifically provides for this. If, after receiving a change order, the Contractor requests an extension of time, within five (5) working days the Contractor must file a written claim to that effect for consideration by the Engineer.
The process of submitting a proposed change, a cost proposal, or negotiating an agreed upon change order, or any failure to reach an agreement as to an adjustment in the contract sum or the
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contract time, shall not relieve the Contractor of the obligation to perform in accordance with the Contract Documents.
A change order may be in the form of a City directed change order or an agreed upon change order.
Upon the receipt of either form of change order, the Contractor shall proceed promptly and diligently with the extra work.
(a) City Directed Change Orders - A City directed change order may be issued by the City without the Contractors signature where the City determines that it is in the Citys best interest to proceed with the work, and the change does not materially alter the character of the work.
The Contractor shall be deemed to have accepted the terms of any City directed change order unless the Contractor asserts a claim with respect to the change order, no later than ten (10) working days following the Contractors receipt of the change order. See General Provisions, Section 5.09`, Disputed Work.
(b) Agreed Upon Change Orders - Within five (5) working days after receiving a request from the City for a written proposal for an agreed upon Change Order, the Contractor shall provide the Engineer with a cost proposal in a form satisfactory to the Engineer, setting forth the Contractors proposed adjustments to the contract sum and contract time for performing the extra work.
Compensation for agreed upon change orders shall be calculated based upon the unit prices stated in the Bid Schedule and no additional markup for overhead or profit will be provided unless stated otherwise as follows. If there are no unit prices for the extra work, the Contractor and the City may agree upon unit prices or lump sum costs, which shall be used to increase or decrease the contract sum. In the absence of any such agreement, the contract sum shall be adjusted by Force Account.
1. Quantity Adjustments - Unit prices shall govern not only for alterations to work covered by written specifications and drawings, but also for other work incidental or necessary to completing the work for which written specifications and drawings may be later prepared. Whenever an item of work or materials is specified in the contract by unit price and is increased or decreased by more than 25 percent (25%), Section 9-1.06 of the Standard Specifications shall govern payment. This Section allows for a renegotiation of the unit price based upon consideration of the total pay item cost. If, however, a renegotiated price cannot be reached by the Contractor and the City, then the payment for this item shall be adjusted by Force Account.
2. Agreed Upon Price If there are no unit prices for proposed extra work, the Contractor and the City may agree upon unit prices or lump sum costs, by written change order, prior to commencing work. In the absence of any such agreement, the contract sum shall be adjusted by Force Account.
3. Force Account - When extra work is to be paid on a force account basis, the labor, materials and equipment used in the performance of that work shall be paid in accordance with the 2010 State Standard Specification, Section 9-1.04 Force Account. To the total of the direct costs computed, there can be an added markup of up to thirty-five percent (35%) to the cost of labor, up to fifteen-percent (15%) to the cost of materials and up to fifteen-percent (15%) to the cost of equipment. These markups shall constitute full compensation for any and all overhead costs, profit, or other costs not specifically designated as a cost of labor, material or equipment.
When subcontractors perform force account work, an additional ten-percent (10%) markup shall be added to the total cost of the extra work to reimburse the Contractor for additional administrative costs. No markup for any Subcontractor beyond the first tier shall be paid.
During the performance of extra work by Force Account, and as a condition to the Contractors right to an adjustment of the contract sum, the Contractor shall prepare daily reports itemizing all costs for labor, materials, and equipment rental
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and provide certified payrolls. For labor costs, the reports shall include names, job classifications, hours worked and rates of pay. For equipment costs, the reports shall include size, type, identification number and hours of operation. All records and reports shall be submitted to the Engineer for approval on a daily basis. Reports shall be made on the State of California, Daily Extra Work Report Form or on a similar form approved by the Engineer.
i. Labor - Labor costs shall be based on the prevailing wage scale for each craft or type of workman, and no compensation shall be allowed for payment in excess of the prevailing wage. Employer payments for payroll taxes and insurance, health and welfare, pension, vacation, and other direct labor costs shall be included and will be calculated as the Labor Surcharge stipulated in the State of California, Labor Surcharge and Equipment Rental Rates book. ii. Materials - Materials cost shall be the cost of all materials purchased by the Contractor and used in the extra work and shall be the actual cost of such materials, including sales taxes, freight and delivery charges. The City reserves the right to reject materials to be furnished by the Contractor, sources of supply or, if necessary, to furnish the materials to the Contractor.
No compensation will be paid to the Contractor for any material furnished by the City or for materials not used.
iii. Equipment Rental - The Contractor will be allowed the actual rental rate of equipment, prorated over the time the machinery or equipment is required.
For Contractor owned equipment, this rate shall be as stipulated in the State of California, Labor Surcharge and Equipment Rental Rates book. In addition, the Contractor will be allowed reasonable move-in and move-out charges, if applicable. All equipment shall, in the opinion of the Engineer, be in good working order, good condition, and suitable for its purpose.
Equipment or tools having a replacement value of $200.00 or less, whether or not consumed by use, shall be considered small tools and no payment will be made therefore.
iv. Other Services or Expenditures - The City may authorize and approve payment for work performed by special forces or necessary services and expenditures other than labor, materials, and equipment rental.
5.09 Disputed Work - When the Engineer and Contractor fail to agree as to whether an alteration ordered by the Engineer constitutes a material change or difference in the character of the work, or fail to agree upon the compensation to be allowed for such altered work, the Contractor shall proceed with the altered work and file with the Engineer, within ten (10) working days after receiving direction from the Engineer, a written protest detailing the particulars of the dispute and the amount of additional compensation or time required for the alteration. Failure of the Engineer to recognize a change in the character of work when ordering alterations shall in no way be construed as relieving the Contractor of the Contractors duty and responsibility for filing a protest as prescribed above. The City will not consider additional compensation for altered work unless the Contractor files a written protest within ten (10) working days after receiving direction from the Engineer.
If the Contractor has complied with the notification requirements of this sub-section, consideration of payment due shall be made as later determined through claim resolution procedures as set forth in General Provisions, Section 10, Measurement and Payment.
Although not to be considered as approval for proceeding under extra work provisions, the Contractor shall keep and furnish records of disputed work in accordance with General Provisions, Section 5.07, Extra Work.
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SECTION 6 - CONTROL OF MATERIALS
6.01 Materials and Workmanship - All materials, parts and equipment furnished by the Contractor in the work shall be new, high grade, and free from defects. Workmanship shall be in accordance with generally accepted standards. Materials and workmanship shall be subject to the Engineers approval.
Materials and workmanship not conforming to the requirements of these specifications shall be considered defective and will be subject to rejection. Defective work or material, whether in place or not, shall be removed immediately from the site at the Contractors, expense, when so directed by the Engineer.
If the Contractor fails to replace any defective or damaged work or material after notice from the Engineer, the Engineer may cause such work or materials to be replaced. The replacement expense shall be deducted from the amount to be paid to the Contractor.
Used or secondhand materials, parts and equipment are permissible only if permitted by the Special Provisions.
Specialized material or equipment to be used in the work that is not readily available from material suppliers (such as electroliers, luminaries, signal poles, heads, cable, controllers, pumps, etc.) shall be ordered within five (5) days after award of the contract. Time extensions will not be granted for project delays due to the unavailability of such specialized material and equipment unless the Contractor furnishes the Engineer with documentation of purchase order dates, acceptable reason for delay of delivery, or proof of diligent efforts to obtain said items from alternate sources.
The Contractor shall provide the Engineer with periodic reports to inform the Engineer of any changes in the projected material or equipment delivery dates.
6.02 Protection of Work and Materials - The Contractor shall provide and maintain storage facilities and employ such measures as will preserve the specified quality and fitness of materials to be used in the work. Stored materials shall be reasonably accessible for inspection. The Contractor shall also adequately protect new and existing work and equipment for the duration of thecontract.
The Contractor shall not, without the Citys consent, assign, sell, mortgage, hypothecate, or remove equipment or materials which have been installed or delivered and which may be necessary for the completion of the contract.
6.03 Trade Names or Equals In accordance with Public Contract Code Section 3400, whenever any particular material, process, or equipment is indicated by patent, proprietary or brand name, or by the name of a manufacturer or supplier, such wording is used for the purpose of facilitating its description and shall be deemed to be followed by the words or equal.
Because products specified may have a uniqueness that cant be matched, the Contractor must bid the work based upon the products specified. If, during the submittal process, an equivalent product is proposed by the contractor, the contractor shall provide data to show that the product is considered equal.
Contractor shall also identify any price differences, which shall be considered as part of the substitution and if accepted, shall result in an appropriate credit or cost to the City by change order should the substitution be made.
Unless otherwise authorized by the Engineer, the proposed substitution must be submitted in sufficient time, before the normal use or installation of the material, process or equipment, for the Engineer to determine the equivalency and for the Contractor to make any required purchases (including delivery).
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The Engineer shall be responsible for solely determining whether the material proposed for substitution is equivalent to that specified, and the Engineers findings shall be final. If a substitute offered by the Contractor is found to be not equal to the specified material, the Contractor shall furnish and install the specified material.
The specified contract completion time shall not be affected by any circumstances developing from the provisions of this Section.
6.04 Inspection of Materials by City - Unless otherwise specified, inspection may be required at the source for such typical materials and fabricated items as bituminous paving mixtures, structural concrete, metal fabrication, metal casting, welding, concrete pipe manufacture, protective coating application, and similar shop or plant operations.
Standard items of equipment such as electric motors, conveyers, elevators, plumbing fixtures, etc., are subject to inspection at the job site. Special items of equipment such as designed electrical panel boards, large pumps, sewage plant equipment, etc., are subject to inspection at the source, normally only for performance testing. The Special Provisions may specify additional inspection requirements.
6.05 Inspection of Materials by Others - When the City does not elect to make its own inspection at the source, the City may, at its expense, engage an inspector or accredited testing laboratory to inspect the materials, equipment or process. The inspector or representative of the testing laboratory shall judge the materials by the requirements of the plans and specifications. No materials or equipment shall be shipped nor any processing, fabrication or treatment of such materials shall be done without a favorable inspection by the engaged agent. These materials shall be subject to re-inspection at the job-site.
6.06 Tests of Materials - Before incorporation into the work, the Contractor shall submit samples of materials, as the Engineer may require, at no cost to the City. The materials for testing shall be delivered to the place by Contractor, and at the time designated, by the Engineer. Unless otherwise provided by the Special Provisions, all testing shall be performed under the direction of the Engineer, and at no expense to the Contractor.
The Contractor shall notify the City in writing at least fifteen (15) days in advance of any intention to use materials for which tests are specified, to allow sufficient time for the City to perform the tests. The notice shall name the proposed supplier and source of material.
6.07 Certification The Engineer may waive material testing requirements of the Specifications and accept the manufacturers written Certificate of Compliance or test data demonstrating that the materials to be supplied meet the requirements of the specifications. A Certificate of Compliance is acceptable for authorizing the use of steel pipe in sizes less than eighteen (18) inches and vitrified clay, cast iron or ductile iron pipe in all sizes. All materials used on the basis of a Certificate of Compliance may be sampled or tested by the City at any time. The fact that material is used on the basis of a Certificate of Compliance shall not relieve the Contractor of the responsibility for incorporating materials in the work which conforms to the requirements of the Contract Documents.
6.08 Weighing and Metering Equipment All scales and metering equipment used for proportioning materials shall be inspected for accuracy and certified within the past twelve (12) months by the State of California Bureau of Weights and Measures, by the County Director or Sealer of Weights and Measures, or by a scale mechanic registered with or licensed by the County, The accuracy of the work by a scale service agency, except as stated herein, shall meet the standards of the California Business and Professions Code and the California Code of Regulations pertaining to weighing devices. A certificate of compliance shall be presented to the Engineer for approval prior to operation, and shall be renewed whenever required by the Engineer at no cost to the City.
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All scales shall be arranged so they may be read easily from the operators platform or area. They shall indicate the true net weight without the application of any factor. The figures of the scales shall be clearly legible. Scales shall be accurate to within one-percent (1%) when tested with the plant shut down. Weighing equipment shall be so insulated against vibration or moving of other operating equipment in the plant area such that the error in weighing with the entire plant running will not exceed two-percent (2%) for any setting nor one and one half percent (1.5%) for any batch.
6.09 Calibration of Testing Equipment Testing equipment, such as but not limited to, pressure gages, metering devices, hydraulic systems, force (load) measuring instruments, and strain-measuring devices shall be calibrated by a testing agency acceptable to the Engineer at intervals not to exceed twelve (12) months, and following repairs, modification, or relocation of the equipment. Calibration certificates shall be provided when requested by the Engineer.
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SECTION 7 UTILITIES
7.01 Citys Statutory Obligation - Pursuant to Government Code, Section 4215: in any contract to which a public agency as defined in Section 4401 is a party, the public agency shall assume the responsibility, between the parties to the contract, for the timely removal, relocation, or protection of existing main or trunk line utility facilities located on the site of any construction project that is the subject of the contract, if such utilities are not identified by the public agency in the plans and specifications made a part of the invitation for bids. The contract documents shall include provisions to compensate the Contractor for the costs of location, repairing damage not due to the failure of the Contractor to exercise reasonable care, and removing or relocating such utility facilities not indicated in the plans and specifications with reasonable accuracy and for equipment on the project necessarily idled during such work. The Contract documents shall include provisions that the Contractor shall not be assessed liquidated damages for delay in completion of the project, when such delay was caused by the failure of the public agency or the owner of the utility to provide for removal or relocation of such utility facilities.
7.02 Contractors Obligation to Identify and Protect Subsurface Infrastructure - The Contractor shall locate and protect service laterals, conduits, and appurtenances of any underground facility, the presence of which could be reasonably inferred from the Contract Documents or from the presence of visible facilities such as buildings, meters, and junction boxes, prior to doing any work that may damage any such facilities, or interfere with their service. Where underground main distribution conduits, such as water, gas, sewer, electric power, telephone, or cable television are shown on the plans, the Contractor shall assume that every parcel will be served by a service connection for each type of utility. The Contractor shall comply with all requirements for the protection of underground infrastructure as set forth in Government Code, Sections 4215 through 4216.9.
It shall be the Contractors responsibility to complete all work in a manner that satisfies utility co mpany standards, providing if requested, detailed plans p repared by a California Registered Civil Engineer s howing necessary temporary support of utilities during coo rdinated construction work. The Contractor is dire cted to contact these agencies before submitting bids and to be familiar with their requirements and shall include all costs of this coordination within the proposals bid prices.
The Contractor agrees to assume liability and to hold the City of San Carlos, its officers, and employees harmless from any damages resulting from the existence of underground utilities and structures not reported to the Engineer, not indicated on the public records examined, or located at variance with that reported or shown on records examined.
7.03 Location - The City will search known records and indicate on the plans those utilities, except service connections, which may affect the work. All available information regarding removal, relocation, or disconnection of utilities, or installation of new utilities, will be furnished to prospective bidders before the receipt of bids. The Contractor shall immediately report to the Engineer those utilities omitted from the plans or found substantially at variance with the location shown.
Existing and proposed utilities and improvements ar e shown in their approximate locations. Locations may not have been field verified and no guarantee i s made as to the accuracy and completeness of the information shown. The fact that any facility is n ot shown on the plans shall not relieve the Contrac tor of any responsibility under this Section. It shall be the Contractors responsibility to determine the existence and location of utilities shown on the plans, indicated by field locating services, or evidenced by facilities visible in the field. No additional compensation will be allowed for delays incurred as a result of the Contractors failure to field verify and/or pothole existing utilities prior to beginnin g construction. Potholing shall be considered as part of the various contract bid items and no additional compensation will be allowed.
At least three (3) working days prior to commencing work, the Contractor shall request that utility and agencies mark or otherwise indicate the location of their substructures. Contractor shall contact Underground Service Alert (USA) at (800) 642-2444 and the Engineer at least forty-eight (48) hours prior to excavation. The location of utilities as shown on the plans are approximate and are not to be
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construed as certainty. It shall be the Contractors responsibility to determine the true location and depth of all utilities and service connections affecting or conflicting with the work, prior to the performance of the work. As necessary, the Contractor shall pothole these utili ties prior to working in the area to avoid damage t o them.
Potholing shall be considered as part of the contra ct bid items, and no separate payment will be made.
Contractor shall be familiar with the type, material, age and condition of any utility which may be affected by the work.
7.04 Protection - As necessary or as directed by the Engineer, th e Contractor shall field adjust proposed improvements to avoid conflicts with exist ing improvements. The Contractor shall not interrupt the service function or disturb the supporting base of any utility, without authority from the utility Owner or order from the City.
Where protection is required to ensure support of existing underground, overhead and at-grade utilities (including their associated structures and service connections) as shown on the plans, at the Contractors expense such protective measures shall be furnished and placed.. In case of damage, the Contractor, without additional compensation, shall restore utilities to as good of a condition as they were found.
Upon learning of the existence and location of any utility omitted from or shown incorrectly on the plans, the Contractor shall notify the City and be fully responsible for protecting such utility. When authorized by the Engineer, additional protection may be paid by change order, for utilities other than a service connection.
The Contractor shall immediately notify the Engineer and the utility owner when Contractor disturbs, disconnects or damages any utility. If the utility is located substantially as indicated on the plans, the Contractor shall bear the costs of repair or replacement.
When placing concrete around or contiguous to any utility, at the Contractors expense, a cushion of expansion joint material, clear opening, sleeve, or other suitable material approved by the Engineer so as to prevent embedment or bonding of the utility with the concrete shall be furnished and installed.
7.05 Shut Down Notification The City is in-charge of the sewer and storm water collectio n systems, traffic signals and street lighting system and as such the Contractor shall coordinate shut downs of these utilities and facilities with the Citys Engineer a nd Public Works Maintenance Department. The Contra ctor shall also coordinate the shutdown of all other utilities , including, but not limited to water, electricity, gas, communications, or CATV with the corresponding utility owner.
Shut downs of any utility or other facility, when allowed, shall be done only after:
A. The Contractor has coordinated with and notify the Engineer/Utility Owne rs in writing, at least seventy- two (72) hours in advance of the shut down, and,
B. Has properly notified customers (residents, businesses/agencies) emergency response staff, and, C. Has all materials required for the work at the job site prior to requesting a shut off.
Except for scheduled shutdowns and in cases of emergency, the Contractor shall notify all customers and effected parties of a shutdown at least forty-eight (48) hours in advance by writing and four (4) hours in advance by person to allow adequate draw time. Once shut down, the Contractor shall proceed with the work in an expedient manner until the water lines or sewer lines are back in service.
7.06 Removal - Unless otherwise specified, the Contractor shall remove all portions of interfering utilities shown on the plans as abandoned or to be abandoned in place. Before starting removal operations, the Contractor shall ascertain from the utility Owner whether abandonment is complete. The costs involved in the removal and disposal of utilities to be abandoned shall be considered as part of the contract bid items, and no separate payment will be made.
7.07 Relocation - When feasible, the utilities within the area affected by the work will complete their necessary installations, relocations, repairs, or replacements before commencement of work by the Contractor.
When the Contract Documents or plans indicate that a utility is to be relocated, altered or
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constructed by others, the City will conduct all negotiations with the utilities and the work will be done at no cost to the Contractor.
Utilities interfering with the permanent project work, discovered after the award of the contract, shall either be relocated, altered, or reconstructed by the utility, or the Engineer may order changes in the work to avoid interference. Such changes will be paid for in accordance with General Provisions, Section 5, Changes in Work.
When the plans or specifications provide for the Contractor to alter, relocate, or reconstruct a utility, all costs for such work shall be absorbed in the contract bid items. Temporary or permanent relocation or alteration of utilities by the Contractor for convenience shall be theresponsibility of Contractor. Contractor shall make all arrangements, obtain all approvals, and bear all costs. The Contractor may, for convenience or to expedite the work, agree with the owner of any utility to disconnect and reconnect interfering service connections. The City shall not be involved in any such agreement.
7.08 Delays - The Contractor is responsible for notifying utility companies in time to prevent delays attributable to utility relocations or alterations as called for in the Contract Documents. The Contractor shall not be entitled to damages or additional payment if such delay does occur. The Engineer will determine the extent of the delay based on the Baseline Construction Schedule (Section 8.05) and on the project as a whole, and any commensurate extension of time.
7.09 Cooperation - When necessary, the Contractor shall conduct toperations so as to permit access to the worksite and provide time for utility work to be accomplished during the progress of the contract work.
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SECTION 8 PROSECUTION AND PROGRESS
8.01 Notice to Proceed - Within twenty-one (21) calendar days following receipt of the signed agreement, bonds and insurance, the City shall issue the Contractor a Notice to Proceed provided that the documents are acceptable to the City. Unless stated otherwise, the contract time shall commence upon the receipt date on the Notice to Proceed.
8.02 Commencement of Work - Work shall commence within fifteen (15) calendar days following the receipt date on the Notice to Proceed, and shall be diligently prosecuted to completion within the time provided in the Notice to Bidders.
8.03 Subcontracting - Unless otherwise indicated by the Special Provisions, the Contractor shall perform the majority of the project work.
8.04 Administrative Duties - The Contractor shall coordinate the scheduling and timing of administrative duties with other activities to avoid conflicts and to ensure orderly project progress. Such activities include, but shall not be limited to, the preparation of construction schedules, preparation and processing of submittals, requests for information and responding to requests for quotations, attending and preparing for progress meetings and coordinating project closeout activities.
8.05 Baseline Construction Schedule Within ten (10) calendar days of the Notice to Proceed, the Contractor shall submit to the Engineer an acceptable Critical Path Method (CPM) progress schedule showing the critical path for completing the various items of work within the number of contract days specified. The schedule shall show the order in which the Contractor proposes to carry out the major items of work and the dates on which he will start and finish the various items (including procurement of materials and equipment). If requested, the schedule shall be resource loaded to reflect person/crew hours and equipment loading for various construction activities in order for the City to better evaluate the proposed schedule. (a) City Review of Schedule The City may review and note exceptions to the Contractors schedule, if it is not sufficiently detailed to clearly show the work to be completed during each month to assure the completion of the work within the project duration. The Contractor will be solely and exclusively responsible for resolving any exceptions, and the Citys review will not create any scheduling obligations of the City. Any noted corrections to the schedule shall be addressed within five (5) working days.
(b) Update of Schedule After submission of a schedule to which the City has taken no exceptions, the Contractor shall submit an updated schedule on a monthly basis or as otherwise specified by the City until completion of the work. The updated schedule must show the As Constructed progress up to the date for which the schedule has been prepared and reflect any proposed changes in the method of operations, to achieve the project milestones within the required project duration.
(c) Float The schedule must show early and late completion dates for each task. The number of days between these dates will be designated as float. The float will be assigned to the project and available for the City, at the Engineers discretion, to allocate the float to the Contractor as needed to complete the work in accordance with the agreement. (d) Failure to Submit Schedule If the Contractor fails to submit a schedule within the time periods specified in this sub-section, or submits a schedule to which the City has taken uncorrected exceptions, the City may withhold payments to the Contractor until such schedule is submitted and/or corrected in accordance with the Contract Documents.
8.06 Three-Week Look Ahead Schedule - The Contractor is required to furnish to the Engineer, on
a weekly basis at the projects progress meetings, a three-week look ahead schedule. The
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schedule must show planned activities in sufficient detail to allow proper monitoring of the planned construction activities.
8.07 Construction Sequence - The Contractor shall prepare and submit at the pre-construction meeting a staging or phasing plan identifying the sequence of construction work and traffic control needed to complete the project. The staging plan shall be subject to review and approval by the Engineer, prior to the start of construction. The goal of the phasing plan will be to minimize impacts to surrounding businesses and residents in the project areas. When required by the Special Provisions or plans, the Contractor shall follow the sequence of operations as set forth therein.
8.08 Recording Existing Conditions - Existing conditions throughout the project site shall be photographed and/or videotaped by the Contractor before starting construction. Recording shall include and show every detail of existing improvements, including the current condition of the curb, gutter, sidewalk, signs, landscaping, streetlights, structures near the project including face of buildings, canopies, shades, fences and any other features within the limits of work. Photos and/or videotape shall be delivered to the Engineer at the pre-construction meeting.
8.09 Preconstruction Conference - The City shall designate a date and time for the pre- construction conference once the contract has been fully executed. At the pre-construction conference, the City shall discuss various administrative procedures and project coordination issues. At a minimum, the Contractor should be prepared to furnish and discuss the following:
(a) Letter designating the Superintendent.
(b) A list of key personnel and emergency contact information including telephone numbers to be used in case of emergency
(c) Sequence or phasing plans identifying the phasing of construction work and any alternative sequences for consideration.
(d) Traffic control plans associated with the staging plans (to be signed and stamped by a Licensed Traffic Engineer).
(e) A draft of the master Baseline Construction Schedule, in Critical Path Method (CPM) format (to be finalized no later than ten (10) days after the Notice to Proceed). (f) A breakdown of lump sum bid items to be used as a basis for determining the value of work completed on future progress payments.
(g) A submittal schedule listing all project submittals that will need to be reviewed and a listing of proposed material suppliers.
(h) Utility company coordination and/or permit issues.
(i) Videotape and/or photography of the projects existing condition (to be completed prior to starting construction.
(j) Anticipated cash flow projections, if requested by the engineer.
8.10 Progress Meeting - The Contractor, Job Superintendent and Subcontractors, if requested by the City, shall attend weekly progress meetings to be scheduled by the Engineer at a time agreeable to both the Engineer and the Contractor. Contractor shall also attend special meetings in addition to regular progress meetings if necessary and directed by the Engineer.
8.11 Hours of Construction - Construction activities shall be limited to the hours of 8:00 a.m. to 6:00 p.m., unless otherwise noted or further restricted in the Contract Documents, or as directed by the Engineer.
No work shall be done on weekends, holidays or outside these specified hours, unless otherwise approved by the Engineer. The Contractor shall take into consideration and coordinate time constraints for special events or activities organized by the City or other agencies. No mechanical equipment, including hauling or deliveries by trucks, shall start before 8:00 a.m. and all equipment must shut down before 6:00 p.m. unless approved by the Engineer.
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8.12 Prosecution of Work - To minimize public inconvenience and possible hazards and to restore the streets and other work areas to their original condition and former state of usefulness as soon as practicable, the Contractor shall diligently prosecute the work to completion. If, in the Engineers opinion the Contractor fails to prosecute the work to the extent that the above purposes are not being accomplished, the Contractor shall, upon orders from the Engineer, immediately take the steps necessary to fully accomplish said purposes. All costs for prosecuting the work as described herein shall be absorbed in the Contractors bid.
Should the Contractor fail to take the necessary steps to fully accomplish said purposes, after orders of the Engineer to do so, the Engineer may suspend the work in whole or in part, until the Contractor takes said steps.
With or without such suspension, the Engineer may cause such steps to be taken by force account or by other means at the Contractors expense.
8.13 Suspension of Work - Work may be stopped or suspended in whole or in part for up to ninety (90) days when, in the Engineers opinion, the suspension is necessary and in the interest of the City. The Contractor shall immediately comply with any written order of the Engineer suspending work. Such City directed suspension shall be without liability to the Contractor on the part of the City. Suspended work shall be resumed upon written order of the Engineer. An extension of contract time equal to the period of suspension shall be issued to the Contractor by change order. Any claim by the Contractor for an adjustment of the contract sum or the contract time shall be made within ten (10) working days after the end of the work suspension.
If work is suspended through any fault of the Contractor, all expenses and losses incurred by the Contractor during such suspensions shall be borne by the Contractor. If the Contractor fails to properly provide for public safety, traffic, and protection of the work during periods of suspension, the City may elect to do so, and shall deduct the cost thereof from monies due the Contractor. Such action will not relieve the Contractor from any liability.
8.14 Default by the Contractor and Termination of Control - As a result of any of the following events, the Contractor shall be deemed to be in default:
(a) If the Contractor is in bankruptcy or makes a general assignment for the benefit of creditors, or
(b) If the Contractor fails to make prompt payment to subcontractors for labor or materials, or (c) If a receiver is appointed on account of the Contractors insolvency, or (d) If the Contractor fails to provide enough properly skilled workmen or enough materials to insure compliance with the construction time schedule, or (e) If the Contractor fails to perform any portion of the work within the timing requirements of the Contract Documents, or abandons the project site, or
(f) If the Contractor disregards instructions from the Engineer or violates any provision of the contract, or
(g) If the Contractor fails to replace or repair any damage caused by the Contractor or its agents, representatives, contractors, subcontractors, or employees in connection with the performance of the work, or
(h) If the Contractor violates any legal requirement related to the work.
In case of default, the City may give written notice to the Contractor and the Contractors bonding agent that if the default is not remedied within ten (10) calendar days or the Contractor does not provide adequate written assurance to the satisfaction of the Engineer that the cure will be forthcoming, the Contractors control over the work may be terminated as of the date specified in the written notice.
Upon such termination of control the City may enter upon and take possession of the entire work and may also take possession, for the purpose of completing the work, of all of the Contractors tools, equipment and appliances upon the work, and all materials on the site or stored off-site for incorporation into the work.
The City may, at its sole option and without further notice to anyone, complete the work by
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day labor, by contract entered into by negotiations, by competitive bidding, by calling upon the performance of the performance bond surety, or by other means as the City, in its discretion, shall elect.
After termination of the Contractors control over the work as herein provided, the Contractor shall not be entitled to any further payments under the contract until the entire work thereunder has been fully completed and finally accepted by the City. After such completion and acceptance, if the unpaid balance of the contract price (as defined in the next paragraph) exceeds the sum of the amounts expended by the City in taking over and completing the work, including all managerial and administrative expense incurred by the City on account thereof and the amount of all damages incurred by the City by reason of the Contractors default, such excess shall be paid to the Contractor. If the said amount expended exceeds the unpaid balance, the Contractor and the surety shall be liable to the City for the difference. At the Contractors request, the expense incurred by the City in taking over and completing the work, and the amount of any damage incurred by the City by reason of the Contractors default shall be audited and certified by an independent third party, whose certificate thereof shall be binding and conclusive upon the parties.
For the purposes of the computations required by the paragraph above, the unpaid balance of the contract price shall be the original contract price as adjusted by any change orders issued prior to termination of the Contractors control, less all payments made on account thereof prior to such termination, and less any and all amounts withheld or paid pursuant to stop notices filed with the City upon claims of subcontractors or others from equipment, labor or materials furnished to the work on behalf of the Contractor.
Upon completion and acceptance of the work, the Contractor shall be entitled to the return of all materials not used in the work, but without claim against the City for loss or damage with respect thereto, and shall be entitled to the return of all the equipment, tools and appliances taken possession of by the City, but without claim against the City for any charge for the use thereof or for usual and ordinary depreciation and wear and tear.
The exercise of remedies provided for in this sub-section, for default by the Contractor, shall be in addition to, and shall not be deemed a waiver by the City of any other rights or remedies due the City under the contract provisions, for default by the Contractor.
8.15 Contractors Right to Stop Work or Terminate Contract The Contractor may give written notice to the Engineer of intention to stop work or terminate the Agreement, or both if the work should be stopped by order of any court or other public authority, through no act, omission or fault of the Contractor or any Subcontractor, agent or employee of the Contractor, and such work stoppage under such order shall continue for thirty (30) consecutive days from the effective date of such order If, after the Contractor provides notice to the City of any of the above defaults, the City does not remedy the default within ten (10) calendar days, the Contractor may stop work and may give the City written notice of contract termination. The Contractor may then recover from the City payment for all work executed to date and any loss sustained upon any equipment or materials procured for the work prior to the work stoppage.
No compensation for loss of anticipated profits will be provided, however, on work not completed. The Contractors right to recovery shall be subject, however, to the duty of the Contractor to mitigate all loss or damage so far as reasonably possible.
8.16 Citys Right to Terminate Contract The City may, at its option, terminate the Agreement, in whole or from time to time in part, at any time by giving notice to the Contractor. Upon such termination, the Contractor agrees to waive any claims for damages, including loss of anticipated profits, on account thereof; and, as the sole right and remedy of the Contractor, the City shall pay the Contractor in accordance with this sub-section. Upon termination, the obligations of the Contractor for portions of the work already performed shall continue.
(a) Upon receipt of a Notice of Termination, the Contractor shall, unless the notice directs otherwise, do the following:
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1. Immediately discontinue the work to the extent specified in the notice.
2. Place no further orders or subcontracts for materials, equipment, services, or facilities, except as may be necessary to complete such portion of the work that are not to be discontinued.
3. Promptly cancel, on the most favorable terms reasonably possible, all subcontracts to the extent that they relate to the performance of the discontinued portion of the work.
4. Thereafter do only such work as may be necessary to preserve and protect the work already in progress and to protect materials, plants, and equipment on the project site or in transit thereto.
(b) Upon such termination, the City shall pay to the Contractor as a sole and exclusive remedy for the termination, the sum of the following, and the Contractor will be entitled to no other compensation or damages, and expressly waives same:
1. The amount of the contract amount allocated to the portion of the work properly performed by the Contractor as of the date of termination, less sums previously paid to the Contractor, plus
2. Previously unpaid costs of any items delivered to the project site which were fabricated for subsequent incorporation in the work, plus
3. Any proven losses with respect to materials and equipment directly resulting from such termination, plus
4. Reasonable demobilization costs in excess of what would have been incurred if work were not terminated, plus
5. Reasonable costs for preparing a statement of the aforesaid costs, expenses, and losses in connection with such termination.
The City may terminate the Agreement at its own discretion or when conditions encountered during the work make it impossible or impracticable to proceed, or when the City is prevented from proceeding with the Agreement by act of God, by law, or by official action of a public authority.
8.17 Time of Completion and Days Charged - The Contractor shall diligently prosecute and fully complete the work within the number of calendar or working days set forth in the Notice inviting Sealed Proposals or shall be subject to liquidated damages. Time is of the essence in the performance of all obligations under the Contract Documents, and all timing requirements shall be strictly adhered to unless otherwise modified by the City. See General Provisions, Sections 8.12, Prosecution of Work, and 8.18, Liquidated Damages.
Under a calendar day contract, City observed holidays and inclement weather delays are to be anticipated and unless there is a deviation from what is customary for the time of year the project is under construction, no additional days will be granted. Every day, including holidays, Saturdays and Sundays shall be counted as a day charged under a calendar day contract.
Under a working day contract, the Contractor will be given credit for City observed holidays and inclement weather delays, in accordance with the State Standard Specifications. Should the Contractor prepare to begin work at the regular starting time in the morning of any day on which inclement weather, or the conditions resulting from the weather prevents the work from beginning at the usual starting time and the crew is dismissed as a result thereof and the Contractor does not proceed with at least seventy-five percent (75%) of the normal labor and equipment force engaged in the current controlling operations for at least sixty percent (60%)of the total daily time being currently spent on the controlling operations, the Contractor will not be charged for a working day whether or not conditions should change thereafter.
8.18 Liquidated Damages - The City and the Contractor, by execution of the agreement, each agree that time is of the essence in the performance of the work, and that actual damages for
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inconvenience and loss from any delay in completion of the contract beyond the date provided in the Notice to Bidders is extremely difficult or impossible to determine.
The City and the Contractor further agree, as specified in the Notice to Bidders, that liquidated damages shall be assessed for each and every calendar day required to complete the contract in excess of the contract time established for the project, and that the amount stated therein is a reasonable estimate of the amount of such damages. The Engineer may deduct any liquidated damaged owed to the City, as determined by the Engineer from any payments otherwise payable to the Contractor under this agreement.
In addition, the City shall have the right to charge to the Contractor and to deduct from the final payment for the work the actual cost to the City of engineering, inspection, administration and other overhead expenses which are directly chargeable to the contract and which accrue during the period of such delay, except that the cost of final surveys and preparation of the final estimate shall not be included in such charges.
Separate from the above-mentioned liquidated damages, the Contractor shall be responsible for paying all damages incurred by private businesses (residential, commercial or industrial), schools and hospitals due to non-completion of the project by the date specified.
Nothing contained herein shall limit the Citys rights or remedies against Contractor for any default other than failure to complete the work within the contract time. This provision for liquidated damages shall not be applicable nor act as a limitation upon the City if the Contractor abandons the work. In such event, the Contractor shall be liable to the City for all losses incurred.
The date of the Engineers Certificate of Substantial Completion shall be the termination date, if applicable, of liquidated damages.
8.19 Delays and Extensions of Time
(a) Excusable Delays - shall mean delays in the prosecution or completion of the work which result from causes beyond the control of the Contractor and City and which could not have been avoided by the exercise of care, prudence, foresight, and diligence on the part of the Contractor, suppliers, or any tier of the Contractors subcontractors. Excusable Delays fall into the following categories:
1. Abnormal Delays Excusable Delays caused by acts of god, fire, unusual storms, floods, tidal waves, earthquakes, strikes, labor disputes, freight embargoes, and shortages of materials insofar as they prevent the Contractor from proceeding with at least seventy-five percent (75%) of the normal labor and equipment force for at least five (5) hours per day toward completion of the current critical path activity.
2. Weather Delays Excusable Delays due to inclement weather conditions or the conditions resulting from weather prevent the Contractor from proceeding with seventy-five percent (75%) of the normal labor and equipment force engaged in the current critical activity item for a period of at least five (5) hours per day toward completion of the current critical path activity.
3. Material Shortage Delays Excusable Delays due to shortages of material, provided that the Contractor submits satisfactory proof to the Engineer. For the proof to be satisfactory, the Contractor must demonstrate that every effort to obtain the materials from all known sources within reasonable reach of the proposed work has been made. Only the physical shortage of material, caused by unusual circumstances, will be considered under these provisions as an excusable delay, and no consideration will be given to any claim that material could not be obtained at a reasonable, practical, or economical price, unless it is shown to the satisfaction of the Engineer that such material was only available at exorbitant prices. A material shortage delay will not be considered for material
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ordered or delivered late or for material whose availability is affected by virtue of mishandled procurement. The above provisions shall apply equally to equipment to be installed in the work.
(b) Compensable Delays - shall include delays that occur in the prosecution or completion of the work, through no fault of the Contractor which prevent the Contractor from proceeding with at least seventy-five percent (75%) of the normal labor and equipment force for at least five (5) hours per day toward completion of the current critical activity item(s) on the latest favorably reviewed progress schedule due to the following causes:
1. Delays due solely to the actions and/or inactions of the City.
2. Delays due to changed conditions as defined in General Provisions, Section 5.05, Requests for Information, Inconsistencies and Changed Conditions.
3. Delays due to other Contractors employed by the City who interfere with the Contractor's prosecution of the work as defined above.
(c) Inexcusable Delay - means any delay in the completion of the work beyond the expiration of the contract time resulting from causes other than Excusable Delays or Compensable Delays.
An Inexcusable Delay shall not entitle the Contractor to an extension of the contract time or an adjustment of the contract sum. In addition to liquidated damages for inexcusable delays, the Contractor agrees to pay the Citys actual costs, including charges for engineering, inspection and administration incurred during the delay.
(d) Concurrent Delays - those periods of delay when the prosecution of the work is delayed during the same period of time due to causes from a combination of the delays defined as Excusable, Compensable or Inexcusable.
If the Contractor desires an extension of time, he shall file a written request based upon the delays reported. The Engineer will ascertain the facts, the extent of the delays, and the effect upon the entire project, and the City will grant an extension of time equivalent to verified time lost. The request for an extension of time must be made no later than ten (10) working days after the start of the condition that purportedly caused the delay, and no later than fifteen (15) working days after the date on which performance on the condition purportedly causing the delay has ended.
Contractor may make a delay claim for an extension of the contract time for an Excusable Delay or a Compensable Delay. If an Excusable Delay and a Compensable Delay occur concurrently, the maximum extension of the contract time shall be the number of calendar days from the commencement of the first delay to the cessation of the delay which ends last. If an Inexcusable Delay occurs concurrently with either an Excusable Delay or a Compensable Delay, the maximum extension of the contract time shall be the number of calendar days, if any, by which the Excusable Delay or the Compensable Delay exceeds the Inexcusable Delay.
For a Compensable Delay, the Contractor may make a delay claim for an adjustment in the contract sum in an amount equal to the sum of the actual and unavoidable additional costs of labor, material, and equipment furnished at the site by the Contractor or subcontractors, including wages, salaries, fringe benefits and payroll taxes.
Extensions of time, when granted, will be based upon the effect of delays to the project as a whole and will not be granted for non-controlling delays to minor portions of the work unless it can be shown that such delays did, in fact, delay the progress of the project as a whole. For purposes of determining delays, all float associated with the project schedule shall belong to the project. See General Provisions, Section 8.05, Baseline Construction Schedule.
If delays are caused by unforeseen events beyond the control of either the Contractor or the City, such delays will entitle the Contractor to an extension of time as provided herein, but the Contractor shall not be entitled to damages or additional payment due to these delays. War, governmental regulations, labor disputes, strikes, fires, floods, adverse weather necessitating cessation of work, other similar action of the elements, inability to obtain materials, equipment, or labor because of Federal Government
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restrictions arising out of National Defense, required extra work, action or inaction by the City, or other specific reasons as may be further described in the specifications may constitute such a delay. If delays beyond the Contractors control are caused by reasons other than those mentioned above, but are substantially equal in gravity to those enumerated, an extension of time may be granted, if deemed by the Engineer to be in the best interests of the City.
The Contractor shall be entitled to an extension of time if delayed due to a failure of the City to furnish necessary right-of-way or materials which the City agreed to furnish, or by the Citys failure to supply necessary plans or instructions concerning the work, after written request by the Contractor.
For Compensable Delay periods resulting in indirect overhead expenses, the Contractor shall be reimbursed as provided for in General Provisions, Section 5, Changes in Work.
8.20 Substantial Completion When work in accordance with the Contract Documents has progressed to a stage of one-hundred percent (100%) complete, as determined by the Engineer, except for the completion of minor punch list items of deficiencies or omissions in the work which require correction in order to satisfy the agreement, yet do not impair the Citys ability to occupy and fully utilize the work for its intended purpose, the project shall be deemed Substantially Complete. Portions of the work may also be designated by the City as substantially complete if the Contract Documents require separate delivery.
When the Engineer determines that the work or such designated portions of the work are substantially complete, the Engineer will prepare and sign a Certificate of Substantial Completion. The date of substantial completion shall establish the date at which days charged against the project duration shall terminate. The date of substantial completion shall also establish the date of occupancy by the City and the transfer of responsibility from the Contractor to the City for such items as security, maintenance, heat, utilities, insurance, and damage to the work from causes other than that of the Contractor. Unless otherwise indicated in the Certificate of Substantial Completion, the Contractors guarantee for the work shall commence upon the date of substantial completion. See General Provisions, Section 11.01, Contractors Guarantee.
8.21 Project Closeout - After the Contractor has received the Certificate of Substantial Completion and has only minor work remaining, project closeout may begin. The following items and procedures are required as part of the project close out process.
(a) Following the completion of punch list items, the Contractor shall make a written request to the city to conduct a final inspection. The written request shall be accompanied by a Certification that the work has been performed in accordance with the Contract Documents. (b) Within fourteen (14) days of receipt of the Contractor's Certificate of Completion, a final inspection will be scheduled and conducted by the City. As a result of the inspection, the City will advise the Contractor of any work that must be completed or corrected before Acceptance, in the form of a punch list.
(c) The City will conduct a re-inspection of the punch list items within when requested by the Contractor, in writing, with assurances that the punch list requirements have been met. Any charges by a Consulting Engineer/Architect hired by the City to do repeat re-inspection of the punch list may be recovered from the Contractor.
(d) The contractor shall provide a final payment request with lien releases (if applicable) in a format acceptable to the City.
(e) The as-built drawings and all record documents and shall be provided to the City by the Contractor including but not limited to, equipment operation and maintenance manuals, copies of warranties, shop drawings, product data, etc. Record documents shall be properly identified and organized into binders.
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8.22 Final Completion - After the Contractor has received the Certificate of Substantial Completion along with the punch list, and has completed the items identified as necessary for project closeout, the Engineer will make a determination as to if the work is fully completed and in accordance with the Contract Documents. If so, the Engineer will recommend final acceptance to the City Council.
Should it become necessary, due to developed conditions, for the City to occupy any portion of the work, or any part of any structure or equipment, before the contract is completed or accepted, such occupancy shall not constitute an acceptance of any part of the work, unless so stated in writing by the City.
8.23 Final Acceptance Final acceptance by the Engineer will be considered after the work has been fully completed. A Notice of Completion will be filed with the County Recorder once Final Acceptance has been made.
8.24 Risk of Loss - The Contractor shall be responsible for the charge, care and protection of the project and shall bear all risks of injury or damage to the work, materials or equipment delivered to the site, by any means including fire, earthquake, wind, storm or other action of the elements, vandalism, or loss by theft, from the date of Notice to Proceed to the date of the filing of the Notice of Completion by the Engineer. The Contractor shall rebuild, repair, restore and make good all injuries or damage to any portion of the work, and shall bear the entire expense thereof, except such injuries or damages that are caused by riot, insurrection, acts of the Federal or State Government, or a public enemy in time of war.
8.25 Use of Improvements During Construction - The City reserves the right to take over and utilize all or part of any completed facility or appurtenance. Such action by the City will not relieve the Contractor of responsibility for injury or damage to said completed portions of the improvement resulting from use by public traffic, from the action of the elements or from any other cause attributable to the Contractors operations or negligence. The Contractor will be required to restore such portions of the improvement before final acceptance. Nothing in this Section shall be construed as relieving the Contractor from full responsibility for correcting defective work or materials.
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SECTION 9 RESPONSIBILITIES OF THE CONTRACTOR
9.01 Contractors Responsibility for the Work - The Contractor shall supervise, coordinate, and direct the work using Contractors best skill and attention. Contractor shall have control over and be solely responsible for construction means, methods, techniques, sequences, procedures, and the coordination of all portions of the work in accordance with the terms of the Contract Documents until the completion and final acceptance of the work by the City. The Contractor shall furnish and maintain in good condition all equipment and facilities as required for the proper execution and inspection of the work. Such equipment and facilities shall meet all requirements of applicable ordinances and laws.
The Contractor shall rebuild, repair, restore and make good all injuries, damages, re-erections and repairs occasioned or rendered necessary by causes of any nature whatsoever, excepting only acts of God and none other, to all or any portions of the work, excepting as otherwise stipulated.
9.02 Contractors Responsibility for Subcontracted Work - The City will deal directly with, and make all payments to the Contractor only. The Contractor shall be responsible for the coordination of all trades, subcontractors, and suppliers engaged upon the work. Neither the City nor the Engineer will undertake to settle any differences between the Contractor and the subcontractors.
All persons engaged in the work, including subcontractors, will be considered as employees of the Contractor. The Contractor will be held responsible for their work and shall be responsible to the City for acts and omissions including those by their respective agents and employees.
When subcontracted work is not prosecuted in a manner satisfactory to the Engineer, the Contractor shall be notified to take corrective action within a specified time. If timely correction is not made, then upon receipt by the Contractor of written instructions from the Engineer, the Subcontractor shall be removed immediately from the work and shall not be reemployed.
9.03 Superintendent -
The Contractor shall employ, and provide a written letter designating a superintendent and/or representative and all their contact information. The superintendent and/or representative shall be present on the job site whenever work is in progress to coordinate all work with the City and neighboring property owners, and who shall be available by phone twenty-four (24) hours per day, seven (7) days a week up to the Final Acceptance of the work by the City. A backup representative may also be provided. A joint venture shall designate only one Superintendent.
City approval of the Superintendent is required pri or to starting work. The City reserves the right t o request an appropriately qualified replacement of the Superintendent any time during construction of the project.
Contractor shall provide the Engineer with the Supe rintendents telephone number, along with an after- hours emergency contact number of a responsible person who shall correct hazardous situations, should they occur, during times other than the normal working hours.
Directions and information given to the Superintendent shall be considered as having the same effect as if delivered to the Contractor and the Superintendent shall have full authority to execute the same and to supply materials, tools and labor without delay, and who shall be the legally appointed representative of the contractor.
Contractor shall be liable for the faithful observation of any instructions delivered to Contractors duly appointed representatives.
9.04 Character of Workers - Contractor shall provide competent, fully qualified personnel to perform the work and shall at all times maintain good discipline and order among its employees and Subcontractors. Any employed person or Subcontractor who is found to be incompetent, intemperate, troublesome, disorderly or otherwise objectionable or who fails or refuses to perform the work properly and acceptably, shall be immediately removed from the work by the Contractor and shall not be reemployed. Such discharge shall not be the basis of any claim for compensation or damages against the City of San Carlos or any of its officers, employees or agents.
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9.05 Laws to be Observed - The Contractor shall be fully informed of, and at all times observe and comply with all Federal, State and County laws, including those of CAL-OSHA; all municipal ordinances and regulations of the City of San Carlos; and all orders and decrees of bodies having jurisdiction over the work.
The Contractor shall also cause all agents and employees engaged on the project to observe and comply with all such laws, and shall protect and indemnify the City of San Carlos and all officers, employees, and agents thereof connected with the work against any claim or liability arising from or based on the violation of any such law
(a) Non-Discrimination Attention is directed to Labor Code, Section 1735 which reads as follows: No discrimination shall be made in the employment of persons upon public work because of the race, religious creed, color, national origin, ancestry, physical handicap, medical condition, marital status or sex of such persons, except as provided in Government Code, Section 12940 and every Contractor for public works violating this Section is subject to all the penalties imposed for a violation of this chapter. (b) A lien Labor - The Contractor shall forfeit as penalty to the City of San Carlos fifty dollars ($50.00) for each alien with no permit to work in the United States of America (USA) knowingly employed in the contract, by Contractor or by any hired Subcontractor upon any of the work herein mentioned, for each calendar day, or portion thereof, during which such alien is permitted or required to labor in violation of the provisions of the Labor Code and in particular Sections 1850 to 1854 thereof, inclusive.
(a) Hours of Labor Hours of labor shall be pursuant to Labor Code, Sections 1810. Pursuant to Labor Code, Sections 1813, Contractor shall forfeit to the City, as a penalty, twenty-five dollars ($25.00) for each worker employed in the execution of this Agreement by Contractor, or any Subcontractor in violation of the terms of this Section or in violation of the provision of any law of the State of California. Such forfeiture amounts may be deducted from the contract sum. Contractor and each Subcontractor shall keep, or cause to be kept, an accurate record showing the actual hours worked each calendar day and each calendar week by each worker employed on the project, which record shall be kept open at all reasonable hours to the inspection of the City, its officers and agents, and to the inspection of the appropriate enforcement agency of the State of California.
(d) Prevailing Wage As identified in the Notice to Bidders, the work contemplated by this agreement is a public work subject to prevailing wages under California Labor Code, Sections 1720 et. seq. The State of California Department of Industrial Relations has ascertained the general prevailing per diem wage rates in the locality in which the work is to be performed for each craft, classification, or type of worker required to perform the work. A schedule of the most recent general prevailing per diem wage rates made available to the City will be on file at the Citys principal facility office and will be made available to any interested party upon request. This prevailing wage rate schedule is provided by the City for Bidders information only and is not guaranteed by the City to be current. Contractor is obligated to verify all appropriate prevailing wage rates and pay those rates as required. By this reference the verified current schedule of prevailing wage rates is made part of the Contract Documents.
Contractor shall pay not less than the prevailing per diem wage rates, as specified in the schedule and any amendments thereto, to all workers employed by Contractor in the execution of the work. Contractor shall cause all subcontracts to include the provision that all Subcontractors shall pay not less than the specified prevailing per diem wage rates to all workers employed by such Subcontractors in the execution of the work.
Contractor shall forfeit to the City, as a penalty, no more than fifty-dollars ($50.00) for each calendar day or portion thereof for each worker that is paid less than the specified prevailing per diem wage rates for the work or craft in which the worker is employed for any portion of the work done by Contractor or any Subcontractor in violation of the provisions of the Labor Code, and in particular Sections 1770 to 1781 thereof, inclusive. Such forfeiture amounts may be deducted from the contract sum. Contractor shall also pay to any worker who was paid less than the specified prevailing per diem wage rate for the work or craft for which the worker was employed for any portion of the work, for each
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calendar day, or portion thereof, for which the worker was paid less than the specified prevailing per diem wage rate, an amount equal to the difference between the specified prevailing per diem wage rate and the amount which was paid to the worker.
The City will not recognize any claim for additional compensation because of the payment by the Contractor for any wage rate in excess of prevailing wage rates set forth in the Agreement, including payment in excess of the prevailing wage for extra work paid by force account. The possibility of wage increases is one of the elements to be considered by the Contractor in determining the Contractors bid and will not, under any circumstances be considered as the basis of a claim against the City under the Agreement. (e) Payroll Records - Pursuant to Labor Code, Sections 1776, Contractor and all Subcontractors shall keep an accurate payroll record, showing the name, address, social security number, job classification, straight time and overtime hours worked each day and week, and the actual per diem wages paid to each journeyman, apprentice, worker, or other employee employed in connection with the work. All payroll records shall be certified as being true and correct by Contractor or Subcontractors keeping such records; and the payroll records shall be provided to the City no later than three weeks after closing of payroll. The Contractor and all Subcontractors must also furnish electronic certified payroll records to the Labor Commisioner of the State of California, Department of Industrial Relations. (f) Apprentice Program - Attention is directed to State of California Labor Code, Sections 3095, 1777.5, 1777.6, and 1777.7 and Title 8, California Code of Regulations, Section 200, and the applicable Sections that follow. Responsibility for compliance with these requirements lies with the Contractor. To ensure compliance and complete understanding of the law requiring apprentices, and specifically the required ratio thereunder, Contractor or Subcontractors should, where some question exists, contact the Division of Apprenticeship Standards, 425 Golden Gate Avenue, 4 th Floor, San Francisco, California, 94102 or one of its branch offices prior to commencement of the work. In the event Contractor willfully fails to comply with this Section, it will be considered in violation of the requirements of the Contract.
Nothing contained herein shall be considered or interpreted as prohibiting or preventing the hiring by Contractor or Subcontractors of journeyworker trainees who may receive on-the-job training to enable them to achieve journeyworker status in any craft or trade under standards other than those set forth for apprentices.
(g) Safety Program the Contractor shall conform to the rules and regulations pertaining to safety established by the California Division of Industrial Safety and to all requirements as set forth in the State of California Construction Safety Orders (CAL-OSHA), and in particular, Article 3 of these Safety Orders, regarding Accident Prevention and safety meetings. Within ten (10) working days following the Notice of Award the Contractor shall provide a copy of the Contractors Safety Plan. The price paid for the plan is included in the various contract items of work and no additional compensation will be made therefore.
9.06 Permits and Fees Unless otherwise stated in the Special Provisions, the Contractor shall procure all permits, registrations and licenses, including a City business registration, pay all charges and fees, and give all notices necessary for lawful prosecution of the work. All permits, registrations, licenses, and other authorizations shall be secured in sufficient time to prevent delays to the work. The Contractor shall comply with the provisions of said permits, licenses and other authorizations. The contractor shall submit satisfactory proof to the City, prior to issuance of the Notice to Proceed, that such permits, registrations or licenses are and will be in effect throughout the entire life of this contract. The contractor shall keep all permits, registrations and licenses posted on the job site.
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For City Capital Improvement Construction Projects, the Contractor shall obtain a No Fee encroachment and/or building permit. Contractor shall coordinate through the Engineer to insure that all appropriate construction inspections occur.
9.07 Coordination and Cooperation - Construction work by utility companies or other Contractors may be needed or may be occurring simultaneously within or adjacent to the limits of work for this pro ject. The Contractor shall coordinate and cooperate with all other Contractors and utility companies throughout the duration of this project to avoid delays and minimize interf erence and conflicts. Cooperation will be required in the arrangement for the storage of materials, and in the detailed execution of the work. It is the Contractors responsibility to ascertain the nature of work by o thers, coordinate the work, and install, modify, an d maintain traffic control as necessary to avoid interferences and delays on the construction activities. Failure of the Contractor to keep informed of the work progressing on the site and failure to give written notice of lack of progress or defective workmanship by others shall be construed as acceptance by the Contractor of the status of the work as being satisfactory for proper coordination with Contractors work.
Where the work of one trade joins or is on the others work, there shall be no lack of continuity or discrepancy when work is completed. In conforming one kind of work with another, marring or damaging other work will not be permitted. Should improper work of any trade be covered by another which results in damage or defects, the whole work affected shall be made good by the Contractor without expense to the City.
The City reserves the right to perform work or allo w others to perform work, as necessary, within or adjacent to the limits of this project, at any time . If the Contractor or any of the Subcontractors or employees causes loss or damage to any separate Contractor on the work, the Contractor, by agreement or arbitration, if they deems it necessary, will settle any claim for such loss or damage. If such separate Contractor shall sue the City, on account of any loss so sustained, the City shall notify the Contractor, who shall indemnify and hold harmless the City against any loss or damage arising therefrom, including the cost and expense of defending any such suit.
If any portions of the work specified herein are to be installed in any right-ofway owned by the State, County, Municipality, or other public entities or public utilities, it shall be incumbent upon the contractor to familiarize described above will necessarily be subject to their inspection and approval before acceptance of these portions of the work by the Engineer. Any costs for inspection by agents other than those of the City shall be borne by the contractor. Where other agencies have jurisdiction over some portion of the work, and the requirements of the agencies are at variance with this specification, then that portion of the work shall be done in accordance with the requirements of the agency(ies).
The Contractor shall absorb in the bid all costs involved in coordinating the work with others. The Contractor will not be entitled to additional compensation from the City for damages resulting from such simultaneous, collateral and essential work.
9.08 Use of Premises - The Contractor shall confine construction ac tivities to the project limits; which shall consist of right-of-way, easements and/or property owned by the City of San Carlos. With prior approval of the Engineer, adjacent street right-of-way may also be utilized for day-to-day operations. Unless approved by the Engineer, no storage of materials and equipment wil l be allowed to remain within the right-of-way duri ng non- working hours, on the weekends, or during holidays.
Each day, after the completion of construction oper ations, unless otherwise approved by the Engineer, the project limits shall be secured and made access ible to the public. All excess materials and equip ment not protected by approved traffic control devices (such as k-rails) shall be relocated to a staging area or demobilized.
Trench spoils shall be off-hauled daily and open excavations shall be protected with steel plates.
Personnel of Contractor and Subcontractors shall not occupy, live upon, or otherwise make use of the project site during any time that work is not being performed at the project site, except as otherwise provided for in the Contract Documents for issues such as site security.
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9.09 Construction Staging and Field Office - If additional space beyond the const ruction limits is necessary for staging, the Contractor shall, make s pecial arrangements with neighboring property City( s) to secure a staging area for a field office and/or mat erial and equipment storage, at Contractors expens e. The staging area must be fenced, with screening, and shall be operated in a manner that minimizes the inconvenience to neighbors.
The Contractor is encouraged to negotiate side agreements with the property owners of such sites prior to submitting bids. Prior to occupying the staging area, the C ontractor will be required to provide to the Engineer a copy of the agreement or temporary construction easement granted by the property owner. A written release from the property owners or City, holding the City harmless from liability, will also need to be provided. In addition to approval from the property owners, the Contractor may also need to secure a Use Permit fro m the Citys Planning Division.
9.10 Site Security - Contractor shall be responsible for the care and custody of work and the site, including all necessary security provisions, on a 24-hour per day basis throughout the entire term of the Agreement. The Contractor shall provide and maintain storage facilities and employ such measures as will preserve the specified quality and fitness of materials to be used in the work.
9.11 Construction Water The Contractor is responsible for obtaining all water required for the project and shall work with, and obtain all permits from, the appropriate water purveyor prior to obta ining construction water. If hydrant water is to be used , the Contractor must first obtain a hydrant meter and pay all related expenses. Direct connections to hydrants without a meter are not allowed. If water trucks are used, they shall be installed with backflow prevention devices. The cost of water, including all associated fees , deposits or permits shall be incorporated into the various bid items and no separate payment shall be made. Water purveyors include:
California Water Service Company Mid-Peninsu la Water District Bayshore District - Customer Center 3 Dairy Lane
341 North Delaware St. P.O. Box 129
San Mateo, CA 94401-1727 Belmont, CA 94002
M-F: 8 a.m. to 4:30 p.m. M-F: 8 a.m. to 4:30 p.m.
Tel.: (650) 558-7800 Tel.: (650) 591-8941
[email protected] midpeninsulawater.org
9.12 Project Site Maintenance All work identified in this section shall be considered as par t of the contract bid items, and no separate payment will be made thereof. (a) Disposal of Material - Unless otherwise shown on the plans or specified herein, all excess materials and materials removed from existing improvements shall become the property of, and be disposed by the Contractor. The Contractor shall be responsible for all costs associated with disposing all excess materials in a safe and legal manner. No material shall be placed on private or public property without prior approval from the City and the property owner. The Contractor shall not allow any refuse, excavated material, surplus concrete or mortar, or any associated washings, to be disposed upon paved streets, into manholes or into the Citys storm drain system.
Contractor shall establish a system for daily collection and disposal of waste materials from construction areas and elsewhere on the site. Contractor shall handle waste materials that are hazardous, dangerous, or unsanitary separately from inert waste by containerizing appropriately. Burning or burying of waste materials on site will not be permitted.
All materials removed from the existing improvements, which in the opinion of the Engineer have salvage value, shall be delivered to the City Corporation Yard at 1000 Bransten Road, San Carlos, or at any other site designated by the Engineer within the City and shall be considered as part of the contract bid items, with no separate payment will be made thereof.
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(b) Cleanup and Dust Control at all times during construction, including weekends and holidays, and throughout all phases of construction, including work suspensions and until final acceptance of the project, the Contractor shall keep the work site clean and free from rubbish, debris, and prevent the formation of an airborne dust nuisance.
Materials and equipment shall be removed from the site as soon as they are no longer necessary. Upon completion of the work and before final inspection, the entire site shall be cleared of equipment, unused materials, and rubbish so as to present a satisfactory clean and neat appearance.
The Contractor shall abate dust nuisance by cleaning, sweeping, and sprinkling with water, those excavated areas of dirt or other materials which are prone to causing dust, within both the project site and the storage or staging area. If required or directed by the Engineer, the Contractor shall provide an approved water truck of large capacity with spraying capability and/or street sweeper.
The Contractor shall be required to apply water for dust control immediately during construction efforts and within one (1) hour after notification by the Engineer that an airborne nuisance exists. If dust control is not adequate, in the opinion of the Engineer, the Engineer will have this work performed by others and will deduct such cost from the total contract price.
All hauling trucks or other construction vehicles leaving the site shall be cleaned of mud or dirt clinging to exterior body surfaces or wheel rims before traveling on City streets outside the work limits. All trucks coming to or leaving the site with materials or loose debris shall be loaded in a manner, which will prevent the dropping of materials or debris on City streets. Spillage resulting from hauling operations along or across any public traveled way shall be removed immediately.
When construction operations cause dirt to be deposited on public streets, the Contractor shall immediately remove such material. Streets shall be cleaned by street sweeping, rather than flushing, so as to prevent mud from entering the storm drain system.
Excess excavated material shall be removed from the site immediately. Sufficient material may remain for use as backfill if permitted by the specifications. Forms and form lumber shall be removed from the site as soon as practicable after stripping.
Failure of the Contractor to comply with the Engineers cleanup orders may result in an order to suspend work until the condition is corrected. No additional compensation will be allowed as a result of such suspension.
(c) Air Pollution Control - The Contractor shall not discharge smoke, dust, or any other air contaminants into the atmosphere in such quantity as will violate the regulations of any legally constituted authority.
(d) Noise Control - The Contractor shall make every reasonable effort to control noise generated as a result of construction to the satisfaction of the Engineer. Use of an air compressor, jackhammer or other loud, vibrating sound generating device shall be limited to operations between the hours of 8:00 a.m. and 6:00 p.m. Monday thru Friday and between 9:00 a.m. to 5:00 p.m. on Saturday and Sunday, unless otherwise authorized by the Engineer. (e) Vermin Control - At the time of acceptance, structures entirely constructed under the contract shall be free of rodents, insects, vermin and pests. Necessary extermination work shall be arranged and paid for by the Contractor as part of the contract work within the contract time and shall be performed by a licensed exterminator in accordance with requirements of governing authorities. The Contractor shall be liable for injury to persons or property and responsible for the elimination of offensive odors resulting from extermination operations. (f) Sanitation - The Contractor shall provide and maintain enclosed toilets for the use of employees engaged in the work. These accommodations shall be maintained in a neat
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and sanitary condition. They shall also comply with all applicable laws, ordinances and regulations pertaining to the public health and sanitation of dwellings and camps. (g) Wastewater - Wastewater systems shall not be interrupted. Should the Contractor disrupt existing sewer facilities, the Contractor shall immediately notify the Engineer, and the Contractor shall establish a plan, subject to the approval of the City, to convey the sewage in closed conduits and disposed of it back into the sanitary sewer system. Sewage shall not be permitted to flow in trenches or be covered by backfill. (h) Temporary Light, Power and Water - The Contractor shall furnish, install, maintain, and remove all temporary light, power, and water, including piping, wiring, lamps, and other equipment, necessary for the work at Contractors expense. The Contractor shall not draw water from any water source, except to extinguish a fire, without first obtaining permission from the appropriate water utility company/agency.
(i) Storm Water Pollution Control All work shall conform to the National Pollutant Discharge Elimination System (NPDES) General Permit for Storm Water Discharges Associated with Construction and Land Disturbance Activities (Order No. 2009-0009-DWQ, NPDES No.
CAS000002) ("General Permit"), and the NPDES Municipal Regional Stormwater Permit (MRP) (Order No. R2-2015-0049, NPDES No. CAS612008). The Contractor shall implement all applicable San Mateo Countywide Water Pollution Prevention Program (SMCWPPP) measures and Best Management Practices (BMPs). Failure to comply with the approved construction BMPs will result in the issuance of correction notices, citations and/or a stop work order.
The Contractor shall submit to the City a Stormwater Pollution Prevention Plan (SWPPP) or Water Pollution Control Plan (WPCP), prepared in compliance with all NPDES requirements.
The SWPPP/WPCP prepared by the Contractor shall address how the Contractor will prevent materials from being rinsed or washed into the storm drain system and specify which BMPs will be implemented for preventing sediment and pollutant discharges into the storm water system. The Contractor shall provide for the construction of facilities which may be required to prevent, control, and abate water pollution.
All construction efforts shall be conducted in a manner which prevents the release of hazardous material or hazardous waste into the soil or groundwater, and minimizes the discharge of pollutants into the storm drain system. No pollutants will be allowed to enter the storm drainage system. The Contractor shall be responsible for containing and removing any waste from the Contractors construction operations using the appropriate BMP. The Contractor shall be responsible for cleaning catch basins of solid or liquid waste materials originating from the Contractors operation before this material migrates further into the storm drain system. Violation of this provision shall cause the City to issue a stop-work notice and take necessary action to require the Contractor to correct and comply with regulations. All costs related to the stop-work action and corrective work to come into compliance shall be fully borne by the Contractor.
Existing Drainage Conditions - If the work performed interferes with established drainage patterns, ample provisions shall be made by the Contractor to correct the interference. The City may also direct the Contractor to take additional measures to be performed at the Contractor 's expense.
Illicit Discharge - No dumping or discharge of construction materials, debris, and hazardous materials will be permitted into the City's storm drainage system. In the event of any discharge, leakage, spill or emission of hazardous materials, Contractor shall promptly notify the City and shall clean all affected property. The Contractor shall indemnify, hold harmless and defend the City against all liability incurred as a result of any such discharge, leakage, spill or emission, regardless of whether such liability, cost or expense arises during or after the term of the permit.
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9.13 Preservation of Property - The Contractor shall be responsible for the protection of public and private property adjacent to the work.
Due care shall be exercised to avoid damage to existing roadway improvements and facilities, adjacent property, roadside trees, lawn and shrubbery not designated for removal, pole lines, fences, signs, survey markers and monuments, buildings and structures, conduits, pipe lines under or above ground, sewer and water laterals, and any other improvements or facilities within or outside the limits of construction. As ordered and approved by the Engineer, the Contractor shall provide and install suitable safeguards to protect such objects from injury or damage. If such objects are injured or damaged by reason of the Contractors operations, they shall be replaced or restored, at the Contractors expense, to a condition as good as when the Contractor entered upon the work, or as good as required by the Contract Documents.
Existing striping damaged during construction within and adjacent to the project site shall be replaced with thermoplastic. Partially damaged striping (such as what might occur trenching through a pavement legend), shall be replaced in their entirety.