BID ITEM DESCRIPTIONS
0-1.01 GENERAL
Bid item descriptions are included below.
It is the intent of the Proposal and this Contract Document that the bid for each lump sum or unit price item, as submitted, and as required b y the Contract Documents. All costs in connection with the work, including labor, material s and equipment to fully complete the work, shall be included in the lump sum or unit price named in the Proposal. No item of work required by contract documents for proper and successful completion of the contract will be paid for in addition to the prices submitted in the Proposal. All work not specifically set forth in the Proposal as a pay item shall be considered a subsidiary obligation of the Contractor and all costs in connection therewith shall be included in prices shown in the Proposal.
Full compensation for conforming to the requirement s in the Special Provisions (unless otherwise noted) shall be considered as included in the contract prices paid for the various items of work involved and no separate payment will be made therefor. 0-1.02 MEASUREMENT AND PAYMENT
Lump sum bid items will be measured as a complete job, and are intended to cover payment for all work in connection with the item as indicated on the plans and as described throughout these specifications.
Unit price bid items will be measured as described in the bid schedule or specifications.
BID items for this project are as follows:
MOBILIZATION
The contract lump sum price for “Mobilization” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in mobilization including remobilization, demobilization costs and efforts, obtaining all bonds, all Contractor-acquired permit s, bonds, licenses, agreements, certifications, and public and agency notifications ; submittal and approval of initial and progress schedules and submittals; moving onto the site of all equipment, staff including obtaining and setting up of Contractor’s staging ar ea/yard; furnishing and erecting all needed construction facilities, fencing, project si gnage; project security; preconstruction photographs and video recording of surface features ; progress schedules and reports; contract meetings; and record drawings as specified herein, as shown on th e Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
TRAFFIC CONTROL
The contract lump sum price for “Traffic Control” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved including preparing typical and/or detailed traffic control plans, placing, adjusting and removing temporary traffic control measures, such as, but not limited to, flags, cones,
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barricades, crash barriers, signs, and flaggers (pe rsonnel dedicated to controlling and managing traffic); furnishing, installing and removing CIP project signs, traffic control signs both as required by the Contract Drawings and as part of the approved traffic control plan; incidentals necessary for worker, pedestrian and traffic protection, including furnishing all equipment, materials and personnel associated there with; providing traffic control for project work areas and duration of the project as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
PEDESTRIAN HYBRID BEACON SYSTEM
The contract lump sum price for “Pedestrian Hybrid Beacon System” shall include full compensation for furnishing all labor, tools, equipment, and incidentals and for doing all the work involved including but not limited to potholing to determine the pole foundation, in-kind hardscape and softscape replacement, loop detectors, pedestrian push button, poles, hardware, foundations, demolition and installation, conduits, conductors, excavation, backfilling, lights, beacons, cabinet, controller, concrete pad, clock, service installation, pull box, handholes, permitting and coordination with Caltrans and PG&E, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor
SIGNING and STRIPING
The contract lump sum price for “Signing and Striping” shall include full compensation for furnishing all labor, materials, tools, equipment, and incidentals and for doing all the work involved in furnishing and installation of the signing and pavement striping including but not limited to striping removal, complete in place, as specified herein, as shown on the Plans, as specified in the Specifications, and the Special Provisions, and as directed by the Engineer and no additional compensation will be allowed therefor.
END OF SECTION
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TECHNICAL SPECIFICATIONS
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TABLE OF CONTENTS
SECTION 011100 - SUMMARY OF WORK ............................................................................1 SECTION 013000 – SPECIAL PROJECT CONSTRAINTS....................................................6 SECTION 013100 – COORDINATION ....................................................................................7 SECTION 013300 – CONTRACTOR SUBMITTALS .............................................................10 SECTION 014516 – QUALITY CONTROL............................................................................18 SECTION 015050 – MOBILIZATION ....................................................................................24 SECTION 015100 – TEMPORARY UTILITIES AND FACILITIES........................................27 SECTION 015550 – TEMPORARY TRAFFIC CONTROL SYSTEMS..................................29 SECTION 015600 – PROTECTION OF EXISTING FACILITIES ..........................................36 SECTION 020010 – SITE CONDITIONS...............................................................................42 SECTION 020030 – EXISTING UTILITIES AND UNDERGROUND STRUCTURES ...........45 SECTION 021100 – SITE PREPARATION ...........................................................................47 SECTION 024100 - DEMOLITION.........................................................................................49 SECTION 310513 – CLEARING & GRUBBING, EXCAVATION, AND EARTHWORK .......56 SECTION 312333 – TRENCH EXCAVATION AND BACKFILL...........................................65 SECTION 321123 – AGGREGATE BASE COURSES .........................................................73 SECTION 321216 – ASPHALT PAVING AND MISCELLANEOUS PAVING ITEMS...........77 SECTION 321313 – CONCRETE IMPROVEMENTS............................................................86 SECTION 321723 – TRAFFIC STRIPING, PAVEMENT MARKERS, PAVEMENT MARKINGS AND SIGNAGE .................................................................................................91 SECTION 332250 – SHORING AND TRENCH SAFETY......................................................98 SECTION 332315 – EXCAVATION AND BACKFILL.........................................................102 SECTION 333600 – GROUT ...............................................................................................112 SECTION 344133 – PEDESTRIAN WARNING LIGHTS ....................................................118
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SECTION 011100 - SUMMARY OF WORK
PART 1 GENERAL
1.1 SUMMARY
A. The Contract Documents describe the Work to be performed under this Contract which includes, but is not limited to, providing all plant, tools, equipment, materials, supplies, and manufactured articles for the Project. It shall also include the providing of all transportation and services, including fuel, power, water, and essential communications, necessary and for the performance of all labor, work, or other operations required for the performance of the Contract in accordance with the Contract Documents.
B. The Contractor shall sufficiently obligate himself/herself and take the necessary precautions so as to perform and complete the work in accordance with the requirements of the contract documents and specifications and/or as shown on the plans and within the time limit specified herein.
C. Related Sections
1. Section 013000 – Special Project Constraints
2. Section 013300 – Contractor Submittals
3. Section 015100 – Temporary Utilities and Facilities
4. Section 015550 – Temporary Traffic Control Systems
1.2 WORK COVERED BY CONTRACT DOCUMENTS
A. The work is described generally as the following work items:
1. Pedestrian Hybrid Beacon System installation
2. Pavement striping and markings
3. Sign installation
4. Miscellaneous including incidental items of work
B. All risk of loss, damage or diminution to the Work shall rest with Contractor until final acceptance of the Work by the City.
1.3 JOB CONDITIONS
A. The Project corridor includes gas mains, high voltage underground power lines, and other potentially hazardous facilities. Contractor shall make himself fully aware of all potential hazards and utilize experienced and qualified personnel when working adjacent to such facilities. Contractor shall be responsible to coordinate with the utility owners as required for compliance when working adjacent to such facilities.
B. Contractor shall be responsible for making himself familiar with the site conditions.
1.4 BEGINNING AND COMPLETION OF THE WORK
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A. In accordance with the provisions of the Contract Documents, the Contractor shall begin the Work on the date specified in the written Notice to Proceed from the City, and shall complete all of the Work included in the Contract within the time specified in said Notice. Time stated for completion shall include final cleanup of the premises.
1.5 CONTRACT METHOD
A. The Work of this Contract is a combination unit price and lump sum contract. The basis for measurement and payment shall be as indicated in the General Provisions and these Specifications.
B. The Contractor shall include the requirements of the General Provisions, Special Provisions, and Engineer’s Supplementary Conditions, as a part of all of its subcontract agreements.
1.6 ORDER OF THE WORK
A. Contractor’s order and time to complete shall conform to the requirements of the approved Contractor's schedule as submitted under the provisions for "Contractor's Schedules" in Section 013300, “Contractor Submittals.” B. Order of work shall include, but not be limited to, consideration of constraints as described in Section 013000, “Special Project Constraints.”
1.7 WORK BY OTHERS
A. Multiple projects (City, other agency, and private) are planned in or adjacent to the City right of way during the time of the contract in the immediate vicinity. The Contractor is responsible for full cooperation with adjacent project operations, coordination of work and work area, and provision of requisite temporary traffic control measures as required within these special provisions.
B. Interference With Work on Utilities: The Contractor shall cooperate fully with all utility forces of the City or forces of other public or private agencies engaged in the relocation, altering, installation or otherwise rearranging of any facilities which interfere with the progress of the Work, and shall schedule the Work so as to minimize interference with said relocation, altering, or other rearranging of facilities.
C. Contractor shall cooperate fully with all other City contractors or forces of other public or private entities engaged in the installation, relocation, altering, or otherwise rearranging of any facilities which interfere with the progress of the Work, and shall schedule the Work so as to minimize interference with said installation, relocation, altering, or other rearranging of facilities.
1.8 WORK SEQUENCE/NOTIFICATIONS
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A. No sustained interruption in access to any adjacent businesses, institutions, or residences along the alignment can be accommodated. Interruption of access to any adjacent businesses or residences shall not exceed 30 minutes without approval from the City and shall not continue beyond project work hours as specified in Section 013000, “Special Project Constraints.” Prior to beginning work in the vicinity of any businesses, institutions, or residences, the Contractor shall contact the businesses, institution, or residences, provide the business, institution, or home owner a written preliminary notification of the intended schedule, and if necessary, determine and prepare an alternate schedule for the Engineer’s approval that provides minimal disruption. Additional notification requirements are specified in Section 015550, “Temporary Traffic Control Systems.”
1.9 CONTRACTOR USE OF PROJECT SITE
A. The Contractor's use of the project site shall be limited to its construction operations, including on-site storage of materials, and on-site fabrication facilities.
B. The Contractor shall remove all equipment and materials from the City of San Carlos rights-of-way outside of normal work hours.
1. The Contractor shall identify potential staging site(s) for the Contractor’s use for construction staging and storage of equipment/materials directly related to this Project. The Contractor shall make all arrangements with property owner, City, and/or any other party(ies) of interest for staging areas. the Contractor shall provide a signed letter from the property owner authorizing the use of the property as a staging area.
1.10 CITY USE OF THE PROJECT SITE
A. The City and the Engineer and their authorized representatives shall be allowed access to the project site at all times during the period of construction.
B. Private utility companies and other entities performing construction on the site shall have access to the project site.
C. Any land-locked parcels adjacent to the project site shall be provided access/egress by the Contractor.
1.11 PARTIAL UTILIZATION OF THE WORK BY CITY
A. The City may allow partial utilization of the Work upon completion of the various stages. Utilization of the work does not indicate acceptance of any portion of the work.
1.12 PROJECT MEETINGS
A. Preconstruction Meeting: Prior to the commencement of Work at the site, a
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Preconstruction meeting will be held at a mutually agreed time and place which shall be attended by the Contractor, its Superintendent, and its subcontractors as appropriate. Other attendees may include:
1. Engineer and the Construction Inspector.
2. Representatives of City.
3. Representatives of Permittees as appropriate.
4. Others as requested by Contractor, or Engineer.
B. Unless previously submitted to the Engineer, the Contractor shall bring to the meeting six copies of each of the following:
1. Draft Construction Schedule.
2. Procurement schedule of major equipment and materials and items requiring long lead time.
3. Preliminary Schedule of Shop Drawings, Samples, and Product Data Submittals.
4. Schedule of Values (unit price and lump sum price breakdown) for progress payment purposes.
5. Substitution Requests per Section 013300.
6. Letter of Responsibility designating emergency contacts for the Contractor after business hours (3 copies).
C. The purpose of the meeting is to designate responsible personnel and establish a working relationship. Matters requiring coordination will be discussed and procedures for handling such matters established. The agenda may include the following:
1. Contractor's tentative schedules.
2. Update on public outreach.
3. Transmittal, review, and distribution of Contractor's submittals.
4. Processing applications for payment.
5. Maintaining of record documents.
6. Critical work sequencing.
7. Field decisions and Change Orders.
8. Use of project site, office and storage areas, security, housekeeping, and City's needs.
9. Major equipment deliveries and priorities.
10. Contractor's assignments for safety and first aid.
11. Contact information for Contractor, Superintendent.
D. The Engineer will preside at the Preconstruction meeting and will arrange for keeping the minutes and distributing the minutes to all persons in attendance.
1.13 PRECONSTRUCTION PHOTOGRAPHS
A. Prior to commencement of any construction activity, the City Inspector will take photographs and/or video of all work areas.
B. The Contractor shall conduct a photographic and/or video survey prior to commencement of any construction activity. The purpose for preconstruction documentation is to establish baseline conditions for evaluation of any change
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in existing conditions in the vicinity of the work zone during construction (i.e. damage to existing hardscape, structures, etc.).
1.14 WEEKLY PROGRESS MEETINGS
A. Weekly progress meetings will be scheduled and held at the City office, or another mutually agreed location near the site.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
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SECTION 013000 – SPECIAL PROJECT CONSTRAINTS
PART 1 - GENERAL
1.1 SCHEDULING
A. Pedestrian access shall be maintained throughout the project site for the duration of the construction. Vehicle access to the adjacent businesses, institutions, and residences shall also be maintained for the duration of the closure.
B. The Contractor shall locate and make himself familiar with existing underground utilities. The proposed roadway and improvements may be within close proximity to existing facilities. The Contractor shall maintain a minimum cover of 18-inches from subgrade to all existing utilities. Any locations that do not meet this requirement shall immediately be brought to the attention of the Engineer.
Adherence with this clause and protection of existing facilities shall be the responsibility of the Contractor.
C. The Contractor shall submit a construction staging area plan for City approval for all staging areas proposed for use with the project.
D. The construction constraints described herein shall be incorporated into the Contractor's schedule.
E. The Contractor shall be responsible for the allocation of space for temporary field offices and structures (if necessary) furnished by itself or its subcontractors; monitoring the use of temporary utilities; verification that adequate services are available to comply with requirements for Work and climatic conditions; and the administration of traffic and parking controls. All such work shall be in strict conformance with the applicable requirements specified in Sections 015100, “Temporary Utilities”, and elsewhere in this Division 1.
F. Night work will not be permitted, with the exception of temporary traffic control measures necessary to perform the Work.
PART 2 - PRODUCTS
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PART 3 - EXECUTION
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END OF SECTION
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SECTION 013100 – COORDINATION
PART 1 GENERAL
1.1 SUMMARY
A. The Contractor shall be responsible for the coordination of all work and the coordination of the work of all subcontractors. The Contractor shall not delegate coordination to any subcontractor. Coordination, as referred to herein, shall include the establishment of on-site lines of authority and communication and assistance in scheduling of and attendance of progress meetings between the Engineer or the City and the Contractor and its subcontractors. The Contractor's onsite supervisory person shall be present and represent the General Contractor whenever a meeting is held that involves any interface between the City or Engineer and any subcontractors or suppliers.
B. Related Sections
1. Section 011000 – Summary of Work
2. Section 013000 – Special Project Constraints
3. Section 013300 – Contractor Submittals
4. Section 015100 – Temporary Utilities and Facilities
5. Section 015550 – Temporary Traffic Control Systems
6. Section 015600 – Protection of Existing Facilities
1.2 CONSTRUCTION PROGRESS SCHEDULES
A. Submit initial progress schedule for review by Engineer in duplicate within ten (10) working days after date of Contract. After review, submit detailed schedules within ten (10) working days, modified to accommodate revisions recommended by the Engineer and/or the City.
B. Submit revised schedules with each application for payment, identifying changes since previous version. Indicate estimated percentage of completion for each item of work at each submission.
C. Submit a comprehensive 3-week look ahead schedule for discussion with City at each weekly construction progress meeting.
D. Distribute copies of reviewed schedules to project site file, subcontractors, suppliers and other concerned parties.
E. Instruct recipients to promptly report, in writing, problems anticipated by projections indicated in schedules.
F. Submit computer generated horizontal bar chart with separate line for each major portion of work or operation, identifying first workday of each week.
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G. Submit revised Schedule of Values within ten (10) working days after preconstruction meeting, modified to accommodate revisions recommended by the Engineer and/or the City.
1.3 GENERAL COORDINATION
A. All Work covered in the Contract Documents shall be coordinated as a part of the Contractor's obligations under the Contract. The Contractor shall coordinate his/her operations with the City and others working in the immediate area.
B. The Contractor shall assure timely fabrication of work, erection of work, and completion of closeout items and the timely preparation of shop drawings and other submittals in conformance with the approved construction schedule.
C. The Contractor shall coordinate the efforts of all individuals and subcontractors in the execution of the Work, including work by others as specified in Section 01110, "Summary of Work."
D. The Contractor shall resolve differences or disputes between subcontractors concerning coordination, interferences, or extent of work between Sections. The Contractor's decisions, if consistent with the Contract Document requirements, shall be final.
E. The Contractor shall conduct his/her operations so that existing utilities are kept in continuous operation throughout the execution of this contract. The Contractor, therefore, shall schedule and conduct their work so as to minimize interference with the operation and maintenance of these facilities. Methods, schedules and sequences of construction which prevent or jeopardize the City’s compliance with Clean Water Standards or the NPDES Permit are not acceptable.
F. When modification, addition or connection to existing pipelines, structures, systems, circuits or equipment is required, the Contractor shall schedule such activities with the Engineer. The Contractor shall notify the Engineer, in writing, one (1) week in advance of the time when construction operations will require connection to, or modification of, in-service portions of the existing facility. No pipeline system, structure, circuit or individual unit shall be cut, modified, dewatered or removed from the facility unless authorized by the Engineer.
G. In the event that the Contractor accidentally damages operating pipes or utilities, they shall immediately affect the necessary repairs. The Contractor shall maintain an inventory of repair clamps and materials for small pipelines, including temporary pumps, bypass pipelines, electrical conductors or other facilities necessary to maintain operation of sewerage facilities while the repairs are being made. The Contractor shall provide telephone numbers of standby personnel who will respond during non-working hours to repair facilities which interrupt normal operations.
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H. If the Contractor fails to respond to a request by the Engineer, the City reserves the right to affect the repair with its own forces or by another contractor. The cost for repairs performed by others will be deducted from the payment due the Contractor.
I. In addition to notifying the Engineer (Section 1.03 F), Contractor shall notify affected property owners and residents in writing minimum of 48-hours in advance prior to any planned temporary shutdown of utility services.
J. In City and Contractor shall utilize a web-based document management system for submission of all data and documents, including public outreach documents where applicable throughout the duration of the Contract.
1.4 SPECIAL COORDINATION
A. The Contractor shall provide advance notification to the Engineer of specific tasks, tests and inspections specified. Failure to provide such advance notification may be cause for rejection of the Work.
1.5 COORDINATION OF SUBCONTRACTOR RESPONSIBILITIES
A. The Contractor shall be responsible for coordination of the work of each of its subcontractors and suppliers. Special attention is directed to the following obligations of the Contractor:
1. Verify that subcontractors have obtained permits for inspections.
2. Review all subcontractor shop drawings, product data, and sample submittals for compliance with Contract Documents prior to submittal to Engineer for general review for compliance with design intent.
3. Maintain onsite documentation and keep current record drawing set at Project site.
4. Verify that specified cleaning is done during progress of Work and at completion of each subcontract.
PART 2 PRODUCTS
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PART 3 EXECUTION
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END OF SECTION
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SECTION 013300 – CONTRACTOR SUBMITTALS
PART 1 GENERAL
1.1 SUMMARY
A. This section describes general requirements for submittals for the Work.
B. Related Sections
1. Section 011100 – Summary of Work
2. Section 013100 – Coordination
3. Section 015550 – Temporary Traffic Control Systems
4. Section 321216 – Paving Systems
5. Section 321723 – Traffic Striping, Pavement Markers, Pavement Markings & Signage
1.2 PROCEDURES
A. Submit at Contractor’s expense, Schedule of Shop Drawing and Sample Submittals, Safety Plans, Progress Schedules, Product Data, Shop Drawings, Samples, Substitution Requests, Traffic Control Plans, Construction Staging Area Plan, Storm Water Pollution Prevention Plan (SWPPP), and Project Record Documents, and all other submittals required by the Contract Documents. Submit these submittals to Engineer for review and approval.
B. Use a submittal transmittal form, in duplicate, containing:
1. Date, and revision date and submittal log number.
2. Project title.
3. Contractor’s name and address and job number.
4. Specification Section clearly identified.
5. The quantity of each Shop Drawing, Product Data, and Samples submitted.
6. Notification of deviations from Contract Documents.
7. Materials safety data sheet (MSDS) for each item complying with OSHA’s Hazard Communication Standard 29 CFR 1910.1200.
8. Other pertinent data.
C. Where manufacturer’s standard drawings or data sheets are used, they shall be marked clearly to show those portions of the data that are applicable to this project. Submittals shall be submitted based on each technical specification section. Submittals containing information about more than one specification section will be returned for resubmittal. Submittals shall include all information requested by each specification section. (No partial submittals.) Incomplete submittals will be returned not reviewed by Engineer. Provide a log number and reference to Specifications Section and/or Plan sheets and details, for each submittal for ease of identification of submittal. Submittal shall include:
1. Date and revision dates.
2. Revisions, if any, identified.
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3. Project Title and number.
4. The names of: Engineer, Contractor, Subcontractor, Supplier, Manufacturer, and separate detailer, when pertinent.
5. Identification of product material by location within the Project.
6. Relation to adjacent structure or materials.
7. Field dimensions, clearly identified as such.
8. Specification Section number and applicable detail reference numbers on the drawings.
9. Applicable standards, such as ASTM, ANSI, FS, NEMA, SMACNA or ACI.
10. A blank space, on each Drawing or data sheet, 5” x 4” for the Engineer’s stamp.
11. Identification of deviations from Contract Documents.
12. Contractor’s stamp, initialed or signed, with language certifying the review of submittals, verification of field measurements, construction criteria and technical standards in compliance with Contract Documents.
D. The data shown on the Shop Drawings shall be complete with respect to quantities, dimensions, specified performance and design criteria, materials and similar data to show Engineer the materials and equipment Contractor proposes to provide and to enable Engineer to review the information for the limited purposes specified below. Samples shall be identified clearly as to material, supplier, pertinent data such as catalog numbers and the use for which it is intended and otherwise as Engineer may require to enable Engineer to review the submittal. The number of each Sample to be submitted will be as specified in the Specifications.
E. Substitutions:
1. Substitution for those equipment, procedures, materials and/or products specified shall only be permitted when the proposed unnamed “equal” product or material to be furnished is both equal in quality and utility and after the Contractor has complied with the following provisions:
a. All substitutions shall be reviewed by the City;
b. The City must approve such substitution in writing prior to its incorporation into the work;
c. Unless otherwise authorized in writing by the City, the Contractor shall, prior to award and placing any purchase orders, and at least thirty (30) calendar days before it requires approval of any such alternative item, submit to the City sufficient data, drawings, samples, literature or other detailed information as will demonstrate to the City that the proposed substitute is equal in quality and utility to the equipment, materials, procedures and/or products specified.
2. Within thirty (30) calendar days following receipt of all requested information from the Contractor, the City will determine whether the proposed alternative is equal in quality and utility and meets the requirements of the Contract and will inform the Contractor in writing of such determination. The burden of substantiating the quality and utility of alternatives shall be upon the Contractor, and the Contractor shall furnish
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all necessary information requested and required by the City. The City will be the sole judge as to the quality and utility of alternative equipment, materials and/or products, and the City’s decision shall be final. An acceptance by the City of a substitution shall not relieve the Contractor from complying with the requirements of the Project Drawings and Specifications. Acceptance by the City shall not relieve the Contractor from full responsibility for the efficiency, sufficiency and quality and performance of the substitute equipment, materials, procedures and/or products, in the same manner and degree as the equipment, materials, procedures and/or products specified by name.
3. Failure of the Contractor to submit proposed substitutions for review in the manner described above and within the time prescribed shall be sufficient cause for rejection by the City of any other proposed substitutions.
4. In determining whether a proposed product is equal in quality and utility, the City is not restricted to such basic issues as performance and durability, but may consider any other issues that the City, in the discretion of the City, deems appropriate. Said issues may, but are not required to include, nor are they limited to, such additional factors as comparable performance, reliability, efficiency or operation, ease of operation, adaptability, ease of maintenance, capital costs, life-cycle costs, operational characteristics, costs of training personnel, maintenance history, warranties, problems created by the resulting overall warranty system, availability of qualified service, availability of parts, the history of any supplier, and compatibility with existing facilities.
5. No one factor or group of factors, including such issues as savings on capital costs, shall be determinative of whether the proposed product or material is equal in quality and utility. The decision of the City shall be based on those factors deemed by the City to be relevant and any data, drawings, samples, literature or other detailed information furnished by the Contractor with respect to the proposed substitution.
6. Each decision as to whether a product or material is equal in quality and utility shall be made by the City on a case-by-case basis.
7. The Contractor shall be responsible for any and all costs, including consultant costs, incurred by the City with respect to the proposed substitution that exceed the costs inherent in the normal and reasonable review of drawings and other standard data, information and documents concerning any proposed substitution. The Contractor shall be responsible for this cost, regardless of whether or not the substitution is approved by the City.
F. Submittal coordination and verification is the responsibility of Contractor; this responsibility shall not be delegated in whole or in part to subcontractors or suppliers. Before submitting each Shop Drawing or Sample, Contractor shall have reviewed and coordinated each Shop Drawing or Sample with other Shop Drawings and Samples and with the requirements of the Work and the Contract Documents, and shall have determined and verified:
1. All field measurements, quantities, dimensions, specified performance criteria, installation requirements, materials, catalog numbers and similar
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information with respect thereto;
2. All materials with respect to intended use, fabrication, shipping, handling, storage, assembly and installation pertaining to the performance of the Work; and
3. All information relative to Contractor’s sole responsibilities and of means, methods, techniques, sequences and procedures of construction and safety precautions and programs incident thereto.
G. Contractor’s submission to City or to Engineer of a Shop Drawing or Sample submittal will constitute Contractor’s representation that it has satisfied its obligations under the Contract Documents, and as set forth immediately above, with respect to Contractor’s review and approval of that submittal.
H. Designation of work “by others”, if shown in submittals, shall mean that work will be responsibility of Contractor rather than subcontractor or supplier who has prepared submittals.
I. The Contractor shall sign a statement with each submittal, certifying that the submittal has been checked by the Contractor and is in conformance with the Specifications. Any submittal received without this certification shall be returned AMEND AND RESUBMIT and count as one submittal under R.5.a of this specification section.
J. After review by City or Engineer of each of Contractor’s submittals, two (2) sets of material will be returned to Contractor with actions defined as follows:
1. NO EXCEPTIONS TAKEN – A formal revision and resubmission of said submittal will not be required. Accepted subject to its compatibility with future submittals and additional partial submittals for portions of the work not covered in this submittal does not constitute approval or deletion of specified or required items not shown on the submittal.
2. MAKE CORRECTIONS NOTED (NO RESUBMISSIONS REQUIRED)
Same as 1 above, except that minor corrections as noted shall be made by Contractor.
3. AMEND AND RESUBMIT - Rejected because of major inconsistencies or errors that shall be resolved or corrected by Contractor prior to subsequent review by Engineer.
4. REJECTED - The submittal is illegible or the submittal is so far out of compliance with the contract documents that the Contractor needs to try again, from scratch.
K. Contractor shall make a complete and acceptable submittal at least by second submission. City reserves the right to deduct monies from payments due Contractor to cover additional costs of review beyond the second submission.
Illegible submittals will be rejected and returned to Contractor for resubmission.
Contractor shall be in breach of the Contract if it, following a submittal which City determines falls within category 3 above, Contractor’s first resubmittal does not fall within categories 1 or 2 above.
L. Favorable review will not constitute acceptance by City or Engineer of any
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responsibility for the accuracy, coordination and completeness of the submittals.
Accuracy, coordination, and completeness of Submittals shall be the sole responsibility of Contractor, including responsibility to back-check comments, corrections, and modifications from City or Engineer’s review before fabrication.
Contractor, subcontractors, or suppliers may prepare submittals, but Contractor shall ascertain that submittals meet requirements of Contract Documents, while conforming to structural space and access conditions at point of installation.
Engineer’s review will be only to determine if the items covered by the submittals will, after installation or incorporation in the Work, conform to the information given in the Contract Documents and be compatible with the design concept of the completed Project as indicated by the Contract Documents. Favorable review of submittal, method of work, or information regarding materials and equipment Contractor proposes to furnish shall not relieve Contractor of responsibility for errors therein and shall not be regarded as assumption of risks or liability by City or Engineer, or any officer or employee thereof, and Contractor shall have no claim under Contract on account of failure or partial failure or inefficiency or insufficiency of any plan or method of work or material and equipment so accepted.
Favorable review shall be considered to mean merely that City and/or Engineer has no objection to Contractor using, upon his own full responsibility, plan or method of work proposed, or furnishing materials and equipment proposed.
M. City and/or Engineer’s review will not extend the means, methods, techniques, sequences or procedures of construction or to safety precautions or programs incident thereto. The review and approval of a separate item as such will not indicate approval of the assembly in which the item functions.
N. Submit complete initial submittal for those items where required by individual specification Sections. Complete submittal shall contain sufficient data to demonstrate that items comply with Specifications, shall meet minimum requirements for submissions cited in technical specifications, shall include certifications, where required, and shall include necessary revisions required for equipment other than first named. If Contractor submits incomplete initial submittal, when complete submittal is required, submittal may be returned to Contractor without review.
O. It shall be Contractor’s responsibility to copy, conform and distribute reviewed submittals in sufficient numbers for Contractor’s files, subcontractors and vendors.
P. After City and/or Engineer’s review of submittal, revise as noted and resubmit as required.
Identify changes made since previous submittal.
1. Begin no fabrication or work that requires submittals until return of submittals not requiring resubmittal.
2. Normally, submittals will be processed and returned to Contractor within ten (10) working days of receipt.
Q. Distribute copies of reviewed submittals to concerned persons. Instruct recipients to promptly report any inability to comply with provisions.
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R. All shop drawings and submittals shall be number identified by Contractor, prior to submission to Engineer, in accordance with the following:
1. Contractor shall sequentially number each submittal (i.e., “1”, “2”, “3”, etc.) as the basis for number identification of all shop drawings and submittals.
2. Affix the submittal number under which each submittal is made on every copy of each shop drawing, product data, sample, certification, O & M manual, etc.
3. If the submittal is a resubmittal (including without limitation after an initial submittal is rejected, returned not reviewed or marked revise as noted and resubmit), add the suffix designation “A” (i.e., a resubmittal of submittal 1 would be numbered 1A). Subsequent resubmittals would be identified by the submittal number and sequential letters (i.e., “B”, “C”, “D”, etc.).
4. All submittals shall include all information requested by each specification section. No partial submittals will be accepted unless previously authorized by Engineer. In the event a partial submittal is authorized, each subsequent different submittal (as opposed to resubmittal) is given a new number.
5. Number of resubmissions:
a. One reexamination of Contractor’s submittals that have been returned for correction or replacement will be included in Engineer’s scope. Any additional reexamination of Contractor’s submittals will be considered additional scope services to be paid by Contractor through City. Engineer shall be paid hourly at 3.0 times direct payroll expenses and charge consultant’s time at
1.25 times the amount billed Engineer.
1.3 SCHEDULE OF SHOP DRAWING AND SAMPLE SUBMITTALS
A. Submit preliminary Schedule of Shop Drawing, Samples, and Product Data Submittals as required, no later than five (5) working days following receipt of Notice to Proceed from City.
B. Schedule of Shop Drawing, Samples, and Product Data Submittals will be used by City and Engineer to schedule their activities relating to review of submittals.
Schedule of submittals shall indicate a spreading out of submittals and early submittals of long lead-time items and of items that require extensive review.
C. Schedule of Shop Drawing, Samples, and Product Data Submittals shall be reviewed by City and shall be revised and resubmitted until accepted by City.
D. Unless otherwise specified, make submittals in groups containing all associated items to assure that information is available for checking each item when it is received. Identify on the submittal which submittals should be reviewed together.
E. The Contractor agrees that shop drawing submittals processed by the City are not Change Orders; that the purpose of shop drawing submittals by the Contractor
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is to demonstrate to the City that they understand the design concept, that the Contractor demonstrates their understanding by indicating which equipment, procedure and material they intend to furnish and install and by detailing the proposed fabrication and installation methods. The Contractor further agrees that if deviations, discrepancies or conflicts between shop drawing submittals and the Contract Documents in the form of design drawings and specifications are discovered either prior to or after shop drawing submittals are processed by the City, the design drawings and specifications shall control and shall be followed.
1.4 DELAY OF SUBMITTALS
A. Delay of submittals by Contractor is considered avoidable delay. Liq uidated damages incurred because of late submittals will be assessed to Contractor.
B. The City may periodically inspect the record drawings at the site. The proper and current maintenance of the information required on these drawings shall be a condition precedent to approval of requisitions for periodic payment.
1.5 RECORD DRAWINGS
A. General: The Contractor shall keep and maintain, at the job site, one record set of Contract Drawings. On these, it shall mark all project conditions, locations, configurations, and any other changes or deviations which may vary from the details represented on the original Contract Drawings, including buried or concealed construction and utility features which are revealed during the course of construction.
B. Special attention shall be given to recording the horizontal and vertical location of all buried utilities that differ from the locations indicated, or which were not indicated on the Contract Drawings. Said record drawings shall be supplemented by any detailed sketches as necessary or directed to indicate, fully, the Work as actually constructed.
C. These master record drawings of the Contractor’s representation of “as-built” conditions, including all revisions made necessary by addenda, change orders, and the like shall be maintained up-to-date during the progress of the Work.
D. In the case of those drawings which depict the detail requirement for equipment to be assembled in the factory, the record drawings shall be updated by indicating those portions which are superseded by change order drawings or final shop drawings, and by including appropriate reference information describing the change orders by number and the shop drawings by manufacturer, drawing, and revision numbers.
E. Record drawings prepared by the Contractor shall be accessible to the Engineer at all times during the construction period and shall be delivered to the Engineer upon completion of the work.
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F. Effect on Progress Payments: Requests for partial payments will not be approved if the record drawings are not kept current. All such Record Drawings will be inspected by the City each month, showing all variations between the Work as actually constructed and as originally shown on the Contract Drawings or other Contract Documents, and the City will not process monthly payment requests until such drawings are made current each month.
G. Final Record Drawings: Upon substantial completion of the Work and prior to final acceptance by the City, the Contractor shall complete and deliver one bond copy set and an electronic scanned set in PFD format with legible red-line changes dated and signed by the Contractor to the City for approval. The redline changes shall conform to the construction records of the Contractor. This information will be assumed to be reliable, and the Engineering will not be responsible for the accuracy of such information, nor for any errors or omissions which may appear on the Record Drawings as a result.
H. Effect on Final Payment: Final payment will not be approved until the Contractor- prepared bond copy set and an electronic scanned set in PFD format of the Record Drawings have been delivered to the City.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 014516 – QUALITY CONTROL
PART 1 GENERAL
1.1 SITE INVESTIGATION AND CONTROL
A. The Contractor shall verify all dimensions in the field and shall check all field conditions continuously during construction. The Contractor shall be solely responsible for any inaccuracies built into the Work.
B. The Contractor shall inspect related and appurtenant work and shall report in writing to the Engineer, any conditions which will prevent proper completion of the Work. Any required removal, repair, or replacement caused by the Contractor shall be done by the Contractor’s work at its sole cost and expense.
1.2 INSPECTION OF THE WORK
A. General: The Work shall be conducted under the general observation of the Engineer and shall be subject to inspection by representatives of the City to verify strict compliance with the requirements of the Contract Documents.
B. The authorized representative of the Engineer on the project site shall be the Project Engineer acting directly and through various inspectors at the site. The presence of the Inspectors, however, shall not relieve the Contractor of the responsibility for the proper execution of the Work in accordance with all requirements of the Contract Documents. Compliance is distinctly a duty of the Contractor, and said duty shall not be avoided by any act or omission on the part of the inspector(s).
C. All materials and articles furnished by the Contractor shall be subject to rigid inspection, and no material or articles shall be used in the Work until it has been inspected and accepted by the Engineer or the City.
D. Inspection at Place of Manufacture: Unless otherwise specified, all products, materials, and equipment shall be subject to inspection by the Engineer at the place of manufacture if deemed necessary by the Engineer.
E. The presence of the Engineer at the place of manufacture however, shall not relieve the Contractor of the responsibility for furnishing products, materials, procedures and equipment which comply with all requirements of the Contract Documents.
1.3 SAMPLING AND TESTING
A. Unless otherwise specified, all sampling and testing shall be in accordance with the methods prescribed in the current standards of the ASTM or other specified published standards, as applicable to the class and nature of the article or materials considered; however, the City reserves the right to use any generally-accepted system of sampling and testing which, in the opinion of the
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Engineer will indicate to the City that the quality of the workmanship is in full accord with the Contract Documents.
B. Any waiver by the City of any specific testing or other quality assurance measures, whether or not such waiver is accompanied by a guarantee of substantial performance as a relief from the specified testing or other quality assurance requirements as originally specified, and whether or not such guarantee is accompanied by a "performance bond" to assure execution of any necessary corrective or remedial Work, shall not be construed as a waiver of any prescriptive or performance requirements of the Contract Documents. "Performance Bond" as used herein is a separate bond in addition to the Contract Performance Bond required in the General Conditions.
C. Notwithstanding the existence of such waiver, and in addition to any testing and inspection performed by any other inspector on behalf of the City or any other public agency having jurisdiction, the Engineer shall have the right to make independent investigations and tests, and failure of any portion of the Work to meet any of the requirements of the Contract Documents, shall be reasonable cause for the Engineer to require the removal or correction and reconstruction of any such work in accordance with the General Conditions.
1.4 TESTING AND INSPECTION SERVICES
A. Employ and pay for services of an independent testing agency or laboratory acceptable to City to perform specified testing.
1. Prior to start of Work, submit testing laboratory name, address, and telephone number, and names of full-time specialist and responsible officer.
2. Submit copy of report of laboratory facilities inspection made by Materials Reference Laboratory of National Bureau of Standards during most recent inspection, with memorandum of remedies of deficiencies reported by inspection.
B. The independent firm will perform tests, inspections and other services specified in individual specification sections and as required by the Engineer.
1. Laboratory: Authorized to operate in the State of California.
2. Laboratory Staff: Maintain full time specialist on staff to review services.
3. Testing Equipment: Calibrated at reasonable intervals with devices of accuracy traceable to National Bureau of Standards or accepted values of natural physical constants.
C. Testing, inspections and source quality control may occur on or off project site.
Perform off-site testing as required by the Engineer or City.
D. Reports will be submitted by an independent firm to the Engineer and Contractor, indicating observations and results of tests and indicating compliance or non-compliance with Contract Documents.
E. Cooperate with independent firm; furnish samples of materials, design mix,
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equipment, tools, storage, safe access, and assistance by incidental labor as requested.
1. Notify Engineer and independent firm 24 hours prior to expected time for operations requiring services.
2. Make arrangements with independent firm and pay for additional samples and tests required for Contractor's use.
F. Testing and employment of testing agency or laboratory shall not relieve Contractor of obligation to perform Work in accordance with requirements of Contract Documents.
G. Re-testing or re-inspection required because of non-conformance to specified requirements shall be performed by same independent firm on instructions by the Engineer. Payment for re-testing or re-inspection is the sole responsibility of the Contractor.
H. Agency Responsibilities:
1. Test samples of mixes submitted by Contractor.
2. Provide qualified personnel at site. Cooperate with Engineer and Contractor in performance of services.
3. Perform specified sampling and testing of products in accordance with specified standards.
4. Ascertain compliance of materials and mixes with requirements of Contract Documents.
5. Promptly notify the Engineer and Contractor of observed irregularities or non- conformance of Work or products.
6. Perform additional tests required by the City or Engineer.
7. Attend preconstruction meetings and progress meetings on request.
I. Agency Reports: After each test, promptly submit one copy of the report to the Engineer and to the Contractor. When requested by the Engineer, provide interpretation of test results. Include the following:
1. Date issued.
2. Project title and number.
3. Name of inspector.
4. Date and time of sampling or inspection.
5. Identification of product and specifications section.
6. Location in Project.
7. Type of inspection or test.
8. Date of test.
9. Results of tests.
10. Conformance with Contract Documents.
J. Limits On Testing Authority:
1. Agency or laboratory may not release, revoke, alter, or enlarge on requirements of Contract Documents.
2. Agency or laboratory may not approve or accept any portion of the Work.
3. Agency or laboratory may not assume duties of Contractor.
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4. Agency or laboratory has no authority to stop the Work.
1.5 TESTING
A. All materials, equipment and work included in this contract shall be tested and inspected to prove compliance with the contract requirements. Unless otherwise specified, all costs of testing, including temporary facilities and connections, shall be borne by the Contractor. No tests specified herein shall be applied until the item to be tested has been inspected and approval given for the application of such test.
Tests and inspections shall include:
1. Factory tests.
2. The delivery acceptance test and inspections.
3. The installed tests and inspections of items as installed.
4. Tests and inspections, unless otherwise specified or accepted, shall be in accordance with the recognized standards of the industry.
The form of evidence of satisfactory fulfillment of delivery acceptance test and of installed test and inspection requirements shall be, at the discretion of the City, either by tests and inspections carried out in the City’s presence or by certificates or reports of tests and inspections carried out by approved persons or organizations. The Contractor shall provide and use forms which include all test information, including specified operational parameters, and shall be acceptable in content to the City.
B. Factory Observations and Tests. At the request of the City, the Contractor shall arrange with the factory for the City or his/her representatives to observe the manufacturing process and to witness performance tests at the factory or point of manufacture of any and all items to be furnished as a part of this contract. The Contractor shall inform the City in sufficient time to allow arrangements to be made for witness of manufacture and tests. Where the City elects not to observe the manufacture or witness such tests, the Contractor shall provide the City with certifications that the materials and equipment meet the requirements of the specifications.
C. Delivery Acceptance Tests and Inspections. The delivery acceptance tests and inspections shall be at the Contractor’s expense for any materials or equipment specified herein and shall include the following:
1. Test of items at the place of manufacture during and/or on completion of manufacture, comprising material tests, hydraulic pressure tests, electrical and instrumentation subsystem tests; electric and operating tests, and inspections in accordance with the relevant standards of the industry and more particularly as detailed in individual clauses of these specifications to satisfy the City that the items tested and inspected comply with the requirements of this contract.
2. Inspection of all items delivered at the site or to any authorized place of storage in order that the City may be satisfied that such items are of the
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specified quality and are in good order and condition at the tie of delivery.
To that end, the Contractor shall be prepared to remove all coverings, containers or crates to permit the City to conduct the inspection. Should the City find, in his/her opinion, indication of damage or deficient quality, the Contractor shall provide the necessary documentation or conduct tests deemed necessary by the City to demonstrate compliance.
D. Tests and Inspection. All materials and equipment shall be tested by the Contractor to the satisfaction of the City before any facility is put into operation.
Tests shall be as specified in these specifications and shall be made to determine whether the materials and equipment have been properly assembled, aligned, adjusted and connected. Any changes, adjustments or replacements required to make the equipment operate as specified shall be carried out by the Contractor as part of the work.
E. All gauges, meters, recorders and monitors shall be provided by the Contractor as required by the City to supplement or augment the instrumentation system provided under this contract to properly demonstrate that all materials and equipment fully satisfy the requirements of these specifications. All devices employed for the purpose of measuring the performance of the facility’s equipment and systems shall be specifically selected to provide a level of uncertainty consistent with the variables to be monitored. All instruments shall be recently calibrated, and the Contractor shall be prepared at all times to demonstrate, through recalibration, the uncertainty of all instruments employed for testing purposes. Calibration procedures shall be in accordance with applicable standards of ASTM, ISA and IEEE. The adequacy of all gauges, meters, recorders and monitors shall be subject to review of the City.
1.6 MANUFACTURERS' FIELD SERVICES
A. When specified in individual specification sections, require material or product suppliers or manufacturers to provide qualified staff personnel to observe site conditions, conditions of surfaces and installation, quality of workmanship, start- up of equipment, and test, adjust and balance of equipment as applicable, and to initiate instructions when necessary.
B. Submit qualifications of observer to the Engineer thirty (30) days in advance of required observations. Observer subject to approval of Engineer.
C. Report observations and site decisions or instructions given to applicators or installers that are supplemental or contrary to manufacturers' written instructions.
1.7 DEFECTIVE MATERIALS TO BE REMOVED
A. All materials not conforming to the requirements of these Specifications shall be considered as defective; and all such materials, whether in place or not, shall be rejected and shall be removed immediately from the site of the work.
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PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 015050 – MOBILIZATION
PART 1 GENERAL
1.1 SUMMARY
A. Mobilization shall include the obtaining of all bonds, insurance, permits, and licenses; furnishing equipment, temporary buildings, leasing of temporary equipment and material storage area, and other construction facilities; all as required for the proper performance and completion of the Work. In addition to this specification, Section 11 “Mobilization”, paragraph 9-1.16D Mobilization of the Caltrans Standard Specifications shall also apply to this Contract.
Mobilization shall include but not be limited to the following principal items:
1. Moving on to the site and furnishing equipment required for the operations.
2. Developing construction water supply.
3. Providing on-site sanitary facilities and potable water facilities as specified in Section 015100, “Temporary Utilities and Facilities.”
4. Arrangement for and erection of Contractor’s work and storage yard, including
site security.
5. Contractor is advised that there may be insufficient area within the construction zone to provide parking, staging for material and storage of equipment.
6. Providing a meeting room at the Contractor’s work and storage yard, 8.
Posting all EPA and OSHA required notices and establishment of safety programs.
7. Have the Contractor’s superintendent at the job site full time.
8. Submittal and City acceptance of the Construction Schedule.
9. Establishing site security, lighting, fencing, and signing.
10. Obtaining all bonds, insurance, permits, and licenses.
11. Providing public outreach for the duration of the project, including, but not limited to, pre-construction notices, construction area signage, community outreach, etc. Outreach to be coordinated with the various submittals required by the Contractor for coordination, traffic and pedestrian control, and general site controls for the project.
B. Mobilization does not include costs associated with temporary traffic control.
1.2 NOTIFICATION OF RESIDENTS AND BUSINESSES
A. This work shall include furnishing and distributing advance notice flyers to residents and businesses on all streets and including side/cross streets adjacent, and all emergency, public transportation, and garbage/recycle collection services where contract work is to be performed. Notices shall be consistent with dates provided and posted on “No Parking Tow Away” signs.
B. Notifications shall include at least the following information:
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1. Identification of Contractor(s) including emergency contact name(s) and phone number(s),
2. Description of work,
3. Dates and times of construction, and
4. Information regarding street closures and/or detouring.
C. The contractor shall submit to the City an advance notice flyer in the form of a letter or door hanger for review and approval.
PART 2 PRODUCTS
2.1 ADVANCE NOTICE FLYERS
A. Flyer shall contain a general description of the work to be done, a schedule identifying the street segment and date that work is to be performed, and any restrictions that will be imposed as a result of the work.
2.2 NO PARKING SIGNS
A. City will provide “No Parking” signs for the Contractor’s use on this project.
Contractor shall arrange for the pickup of signs not less than seven days prior to being needed.
PART 3 EXECUTION
3.1 DISTRIBUTION OF FLYERS
A. Advance notice flyers shall be hand delivered by the Contractor to residents, schools, or businesses along the impacted streets, including side/cross streets adjacent at least seven to ten (7-10) calendar days in advance of the street closure. Notices shall also be placed on the front window of all vehicles parked against the curb. If different notices are used for different areas, the Contractor shall take care to deliver the appropriate notice to the correct location. In the vicinity of school areas, Contractor shall coordinate with City Staff and school principals to notify the parents of any changes in traffic patterns, detours, or parking restrictions. The notification shall include a copy of the approved Traffic Control Plan or detours around the school area.
B. Notification shall consist of a procedure of written one-week notices (handouts and/or mailings), and door-to-door notifications 24 hours prior to starting work for every phase of construction (Pavement repairs, concrete work, grinding, AC installation, slurry seal, striping, etc.).
3.2 NO PARKING SIGNS
A. If necessary, “No Parking Tow Away” signs shall be posted on the front and back of Type II barricades, spaced no greater than 100-feet apart, a minimum of 48 hours in advance of all work requiring parking restrictions. Only the date in which
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the parking restriction is needed shall be printed (in 2-inch letters) on the sign.
All signs must be removed immediately after the work requiring the parking restriction has been completed.
B. The first barricade of each block, on both sides of the street, in both directions of travel (4 totals) shall contain, in addition to the “No Parking – Tow Away” sign, the advance notice flyer to provide property owners with a general description of the work to be done. The Contractor shall notify the inspector 48 hour in advance of the operation. City inspector will verify the posting and notify the police department.
3.3 PUBLIC OUTREACH
A. Public Outreach
1. The Contractor shall apply a proactive public outreach approach to construction operations throughout the duration of the project, including noticing the public prior to the beginning of construction activities.
Outreach shall be coordinated with the project schedule and project components such as: traffic and pedestrian controls; noticing for residents; businesses; schools; etc. Ensure that the building/property manager or owner receives notifications for managed properties (i.e., apartments, businesses). Public outreach activities need to match updates to the project schedule, and also be timed appropriately for work items.
2. Multiple public notifications shall be provided for various work items as described elsewhere in the specifications.
3. Public outreach shall include daily and weekly activities to notify the public of construction impacts and progress. The Contractor shall designate a construction crew member for public outreach (outreach lead), who will be responsible for handling public outreach tasks and coordination, including coordination with the City. The outreach lead shall attend construction progress meetings.
4. Contractor shall utilize the project’s web-based document management system for the transmittal of outreach materials for City and public.
5. Providing public outreach for the duration of the project, including, but not limited to, pre-construction notices, construction area signage, weekly electronic- based communication, community outreach, etc.
Outreach to be coordinated with the various submittals required by the Contract for coordination, traffic and pedestrian control, and general site controls for the project.
END OF SECTION
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SECTION 015100 – TEMPORARY UTILITIES AND FACILITIES
PART 1 GENERAL
1.1 SUMMARY
A. It shall be the Contractor's responsibility to provide labor and equipment that is adequate for the performance of the Work under this Contract within the time specified. All equipment shall be kept in satisfactory operating condition, shall be capable of safely and efficiently performing the required Work.
1.2 POWER AND LIGHTING
A. Power: The Contractor shall provide all necessary temporary power, including fuel, required for its operations under the Contract, including operation of traffic control devices, lighting, etc., and shall provide and maintain all temporary power lines required to perform the Work in a safe and satisfactory manner.
B. Construction Lighting: All Work conducted at night or under conditions of deficient daylight shall be suitably lighted to ensure proper Work and to afford adequate facilities for inspection and safe working conditions. All construction lighting shall be shielded to reduce light from affecting non-work areas.
C. Approval of Electrical Connections: All temporary connections for electricity shall be subject to approval of the City, the Engineer and the power company representative, and shall be removed in like manner at the Contractor's expense prior to final acceptance of the Work by the City.
D. Separation of Circuits: Unless otherwise permitted by the Engineer, circuits separate from lighting circuits shall be used for all other power purposes.
E. Construction Wiring: All wiring for temporary electric light and power shall be properly installed and maintained and shall be securely fastened in place. All electrical facilities shall conform to the requirements of Title 8, Industrial Relations, Subchapter 5, Electrical Safety Orders, California Administrative Code; and Subpart K of the OSHA Safety and Health Standards for Construction.
1.3 WATER SUPPLY
A. General: The Contractor shall be responsible for making necessary arrangements for obtaining construction water, and shall include the cost of obtaining and use of water in the various bid prices for the project.
1.4 SANITATION
A. Toilet Facilities: Fixed or portable chemical toilets shall be provided wherever needed for the use of employees and shall be regularly maintained to provide
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clean, sanitary conditions.
B. Sanitary and Other Organic Wastes: The Contractor shall establish a regular twice weekly collection of all sanitary and organic wastes. All wastes and refuse from sanitary facilities provided by the Contractor or organic material wastes from any other source related to the Contractor's operations shall be disposed of away from the site in a manner satisfactory to the Engineer and in accordance with all laws and regulations pertaining thereto.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 015550 – TEMPORARY TRAFFIC CONTROL SYSTEMS
PART 1 GENERAL
A. Contractor is responsible for comprehensive site-wide temporary traffic control provisions. Under this item of work, Contractor is also responsible for providing regional temporary traffic control signs and Changeable Message Signs.
1.1 SUBMITTALS
A. Administrative Submittals: Copies of permits and approvals for construction as required by Laws and Regulations and governing agencies.
B. Shop Drawings:
1. Traffic Control, Detour & Routing Plans, Pedestrian Control, and School Zone Access & Pedestrian Control Plans: As specified herein, and proposed revisions thereto. Submittals shall consider both the standard work day and nighttime operations.
C. Traffic Control Engineer: Qualifications of proposed traffic control engineer.
1.2 VEHICULAR TRAFFIC
A. Traffic Control Plan: Detailed traffic control plans shall show the locations of traffic cones, k-rail, construction zones, flaggers, stored pipe and materials, construction truck access, barricades, detours, signs, changeable message boards, and other traffic control facilities. Submit traffic control plans five (5) working days prior to start of construction and throughout all construction stages as the Work progresses.
B. Regional Traffic Management: Regional traffic control plans shall show the locations of access routes, closures, detours, temporary traffic signs, construction signage, changeable message boards, and other regional traffic control facilities. Plan shall show and accommodate adjacent projects. Submit traffic control plans five (5) working days prior to start of construction and throughout all construction stages as the Work progresses.
C. Traffic Routing Plan: Show sequences of construction affecting the use of roadways, time required for each phase of the Work, provisions for decking over excavations and phasing of operations to provide necessary access, and plans for signing, signaling, barricading, and striping to provide passages for pedestrians and vehicles. Include schedule for covering traffic control signs (including detour signs) when not in use and uncovering just prior to use. Show applicable signs for each individual construction stage.
D. Each afternoon at 3 p.m., meet with City or its designated representative to describe the following day's construction operations and the traffic control provisions. At each meeting, submit a detailed update of traffic control
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provisions and construction crew locations. This shall be submitted in hardcopy and electronic form using a Word file. The update shall contain a list of signs and the time and location for covering and uncovering signs.
1.3 TRAFFIC CONTROL ENGINEER
A. The Traffic Control Plans and updates shall be prepared and presented by a registered civil engineer with expertise in traffic control (hereinafter designated as the Traffic Control Engineer). The Traffic Control Engineer shall develop and update Traffic Control Plans, oversee the field implementation of Traffic Control Plans, and provide quality assurance for compliance with traffic control procedures.
B. Each evening and morning, signs shall be covered and uncovered as needed to inform the public of roadway closures, detours, work zones, and other traffic information. Each evening just before crews leave, all signs not required shall be covered and all signs required shall be uncovered. Each morning before start of construction, all signs not required shall be covered and all signs required shall be uncovered. The Traffic Control Engineer shall oversee the covering and uncovering of signs each evening and morning.
C. Traffic Control Engineer shall be responsible for verifying that property owner/occupant notifications are made in accordance with Contract requirements.
PART 2 PRODUCTS
2.1 CIP PROJECT SIGN
A. Material: Aluminum 0.080”
B. Size: 24”x36”
C. Round all corners
D. Colors:
a. Border – white,
b. Background – Green,
c. City of San Carlos Logo – Black, Green, and Yellow,
d. Text – white.
PART 3 EXECUTION
3.1 TRAFFIC CONTROL
A. Traffic control shall be done in accordance with the Traffic Constraints Drawings, Caltrans Standard Plans & Specifications, and the California Manual on Uniform Traffic Control Devices (California MUTCD, Caltrans, January 21, 2010), and the City of San Carlos’ Standards and Specifications.
B. Non-closure traffic control: Work that interferes with public traffic, either one-lane
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or two-lane traffic, shall not cause any traffic delays to public traffic between 7 a.m. to 8:30 a.m., nor more than 5-minute delays to public traffic between the hours of 8:30 a.m. to 4:30 p.m. Local traffic shall not be delayed at any time for more than 5 minutes. School buses shall not be delayed for more than 1 minute.
During non-working hours, Saturdays, Sundays, and holidays, the full width of the traveled way in both directions shall be open for use by the public, unless approved for closure. Where road is closed to through traffic, full width of the roadway shall be open for local traffic during non-working hours. During working hours, one lane of the roadway shall be open for local traffic in both directions except as permitted in advance by the Engineer. Holidays shall be those designated by the City of San Carlos.
1. Emergency Response Vehicles shall not be impeded at any time.
C. Work hours shall be as stated in Special Provisions. Work hours shall be further limited to daylight hours. Daylight hours are defined as 1/2 hour after sunrise and 1/2 hour before Sunset.
D. Contractor shall fill or plate the trench at the end of each working day. Trench plates shall be textured to inhibit skidding. Use cold-patch or other means to feather transition at 3.3 percent (30:1) to plates. Where pit operations remain unfilled, steel plating shall be provided during non-working hours.
E. Traffic Control Engineer shall provide routine surveillance of project during non- working hours. Contractor shall provide the name and phone number for the Contractor’s contact person for nighttime project operations. Replacement of non-working or stolen controls is required prior to commencing with construction.
F. Minimum lane width during construction shall be 11 feet, unless noted otherwise.
1. Nearest travel lane edge (tubular marker delineators) shall be no less than 8 feet from the edge of open trench. Contractor shall use K-Rail if 8 foot cannot be maintained
2. Where cones are used to separate traffic lane from construction zone, do not use traffic lane for accessing construction zone and do not store materials or equipment on or near shoulder of traffic lane side of roadway.
G. Whenever it is necessary to cross, close, or obstruct driveways and walks, whether public or private, provide and maintain suitable and safe bridges, detours, or other temporary expedients for accommodation of public and private travel.
H. Driveway and Private Road Closures: Maintain satisfactory means of exit for persons residing or having occasion to transact business along the route of the Work. If it is necessary to close off vehicular access to property for periods greater than 2 hours, provide written notice to each owner/occupant so affected, 3 days prior to such closure. Steel traffic plates shall be readily accessible in case of emergency.
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I. Maintain top of backfilled trenches before they are paved to allow normal vehicular traffic to pass over. Provide temporary access driveways where required. Cleanup operations shall follow immediately behind backfilling.
J. Notify the fire department, police/sheriff department, highway patrol, ambulance service, local school district, post office, refuse companies and transit agencies five (5) working days before closing roadway or portion thereof. Notify said departments or agencies when streets are again passable for vehicles. Conduct operations with the least interference to fire equipment access, and at no time prevent such access. Furnish Contractor’s night emergency telephone numbers to the police or sheriff's department.
K. Move mailboxes to temporary locations accessible to postal service and on completion of Work in each area, replace them in their original location and in a condition equal to or better than original.
L. Contractor shall move property owners’ (residents’) garbage and recycle cans to areas accessible for garbage and recycle pick up. Garbage and recycle cans shall be returned to owners’ driveway after pick up.
M. Pedestrian and bicycle access along sidewalks and streets will be kept open and safe from construction activities, however necessary closures shall be detour and signed appropriately, per a Pedestrian Control Plan, where applicable.
N. Coordination: Coordinate traffic routing with that of others working in the same or adjacent areas. Coordinate access for garbage pick up, mail delivery, and school buses.
O. Barricades and Lights:
1. Provide as shown on the Traffic Control Plans and in sufficient quantity to safeguard public and Work.
2. Provide as necessary to prevent unauthorized entry to construction areas and affected roads, streets, and alleyways, inside and outside of fenced area, and as required to ensure public safety and the safety of Contractor’s employees, other employer's employees, and others who may be affected by the Work.
3. Provide to protect existing facilities and adjacent properties from potential damage.
4. Locate to enable access by facility operators and property owners.
5. Protect streets, roads, highways, and other public thoroughfares that are closed to traffic by effective barricades with acceptable warning signs.
6. Locate barricades at the nearest intersecting public thoroughfare on each side of the blocked section and at any additional locations indicated on the Traffic Control Plan.
P. Temporary Pavement Markings:
1. Temporary Pavement Delineation: Whenever Contractor’s operations reduce visibility of pavement delineation (lane lines, either pavement
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markers or painted lines or both, or temporary delineation) and pavement marking, such pavement delineation and pavement marking shall be replaced by either permanent or temporary delineation and marking before opening the traveled way to public traffic. Temporary delineation and marking shall consist of reflective traffic tape or reflective pavement markers, as determined by Engineer. Reflective tape for temporary delineation shall be applied in pieces not less than 24 inches long, or less than 4 inches wide, spaced no more than 24 feet apart. Reflective tape for pavement markings shall be placed to approximate the obliterated pavement markings, as determined by Engineer. Reflective traffic tape or reflective pavement markers shall be applied in accordance with the manufacturer's instructions. In areas where construction activity removes the pavement, Contractor shall use portable delineators (18 inches high by 2 inches wide) to designated travel lanes. Portable delineators shall be in accordance with the Standard Specifications.
Once asphalt "plugging" of trench and damaged areas is complete, pavement markings and striping shall be replaced. Temporary pavement delineation shall be maintained by Contractor, at his own expense, until it is replaced with permanent delineation. Final pavement markings and striping shall be done after completion of overlay.
Q. Signs and Equipment:
1. Traffic control signs and equipment shall be placed as shown on Traffic Constraint Drawings and as directed by the City.
2. Contractor shall maintain existing traffic control signs during construction. Roadway facilities and signs shall be protected in accordance with Section 15-1.02 and 7-1.11 of the Standard Specifications.
3. Portable TOW-AWAY-NO STOPPING Signs: Place where approved by police or California Highway Patrol.
4. TOW-AWAY-NO STOPPING signs shall be posted seventy-two (72) hours prior to construction activity requiring removal.
5. Portable BUSINESSES ARE OPEN Signs: Place at accesses to businesses in the vicinity of construction activities.
6. Tubular Markers or Traffic Safety Drums: Provide to delineate traffic lanes to guide and separate traffic movements.
7. Provide at obstructions, such as material piles and equipment, as directed by Engineer.
8. Illuminate barricades and obstructions with warning lights from sunset to sunrise, or as directed by Engineer.
9. Use to alert general public of construction hazards, which would include surface irregularities, unramped walkways, grade changes, and trenches or excavations in roadways and in other public access areas.
10. Post-mount informational signs (all ends of detour and throughout detour vicinity) of detour 5 working days before detouring any traffic as to the date, time, and duration of the detour. Sign shall be stenciled with 6-inch black letters on a retro-reflective orange background. Signs shall meet Caltrans specifications.
11. Place solar powered barricade-type lights on DETOUR signs and
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construction speed limit signs.
12. All portable and night use signs shall use "diamond" grade reflective lettering.
13. Detour signs shall be covered when not in use and uncovered just prior to use. Detour signs shall be covered with wood or metal. The use of easily displaced material such as plastic bags, burlap sacks, duct tape, etc. is not acceptable. All signs that are not applicable to the current construction stage shall be removed or covered.
R. At each road closure barricade, a flagger shall be provided. For each single-lane closure, flaggers shall be provided for each crew. Flaggers shall have radios for communication with other flaggers and with crew foremen. Flaggers shall not leave their posts unattended for any length of time. Provide replacement flaggers as required for continuous coverage.
S. Payment Reductions:
1. Owner reserves the right to retain amounts for non-compliance with the requirements of Section 015550, “Traffic Control”, and Section 015600, “Protection of Existing Facilities”, as follows:
a. Non-compliance related to safety for workers or the traveling public:
1) First non-compliance: $1,000.
2) Second non-compliance: $5,000.
3) Third non-compliance: $10,000.
4) Fourth and subsequent non-compliances, each: $25,000. b. Safety related non-compliance relates to lack of k-rail, cones, barricades, light towers, reflective vests, delineators, flaggers, temporary or permanent striping, crash cushions, emergency access, warning signage, non-skid plates, sufficient clearance of stored pipe, dirt and mud free roads, or to other conditions such as uneven roads that endanger workers or the traveling public. c. Non-compliance related to work hours in City right-of-way:
1) $100 for each minute beyond the work hour limits.
d. Non-compliance related to disruption of the traveling public other than work hour non-compliance:
1) First non-compliance: $0.
2) Second non-compliance: $500.
3) Third non-compliance: $1,000.
4) Fourth and subsequent non-compliances, each: $5,000. e. Non-compliance related to disruption of the traveling public relates to lack of informational or detour signage, failure to cover or uncover signs, failure to meet sequencing and completion. requirements of pipeline segments and locations, or to other conditions that give rise to disruption of the public such as blocked driveways, any delay to a school bus greater than 1 minute or delays related to lack of flaggers or radios. f. If non-complying work items are not corrected in the timeframe designated by Engineer, the City may perform the Work. For such Work, the cost, plus 100 percent for administration and overhead,
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will be retained from payments. This amount is in addition to the amounts indicated above.
g. Amounts retained shall be credited to the Owner through a Change Order to the Contract.
3.2 CIP PROJECT SIGN
A. The Vector files for the sign and logos shall be supplied to the sign manufacturer upon request. The Contractor shall provide the Company name and a 24-hour toll-free contact phone number on the sign. The Contractor shall check with the Project Manager to obtain the project name and telephone number before fabricating the sign.
END OF SECTION
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SECTION 015600 – PROTECTION OF EXISTING FACILITIES
PART 1 GENERAL
1.1 SUMMARY
A. The Contractor shall protect all existing utilities and all other improvements not designated for removal and shall restore damaged or temporarily relocated utilities and improvements to a condition equal to or better than they were prior to such damage or temporary relocation, all in accordance with requirements of the Contract Documents.
B. The Contractor shall verify the exact locations and depths of all utilities shown and the Contractor shall make exploratory excavations of all utilities that may interfere with the Work. All such exploratory excavations shall be performed as soon as practical after award of contract and, in any event, a sufficient time in advance of construction to avoid possible delays to the Contractor's work. When such exploratory excavations show the utility location as shown to be in error, the Contractor shall so notify the Engineer, and shall incorporate updated utility locations into the project record drawings.
C. In the event it is necessary to respond with City crew in lieu of the Contractor to repair damages done to any City facilities caused by the Contractor’s operations or as a consequences thereof, there shall be a minimum mobilization cost fee of $500 for administrative overhead, billing and equipment use in addition to the actual hourly overhead rate (including benefits) billed for City employees and any materials costs. The Contractor shall be obligated to pay this amount separately to the City prior to the completion of the project and retention payment. The use of City crews will be at the discretion of the City.
D. If a hazardous condition is observed and the City notifies the Contractor either directly or by telephone, the Contractor shall correct the condition immediately.
If the Contractor fails to correct the condition immediately, the City reserves the right to call a local supplier(s) or Contractor to install the necessary measures such as lights, barricades, etc. The cost involved shall be deducted from any money due (or to become due) to the Contractor.
E. Contractor shall perform a preconstruction photo survey to document the condition of existing improvements. The Contractor shall be responsible to adequately document the condition for size, kind, quantity and the extent of existing improvements. Photographs shall be for the purpose of documenting the pre-existing condition at the site of work. All surveys shall be delivered to the City prior to commencing work. In the absence of adequate preconstruction documentation, the Engineer’s judgment shall be final.
1.2 RIGHTS-OF-WAY
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A. The Contractor shall not do any work that would affect any gas, sewer, storm drain, waterline, recycled waterline, telephone, railroad, or electric line, any fence, or any other structure, nor shall the Contractor enter upon the rights-of- way involved until notified by the Engineer that the City has secured authority therefore from the proper party. After authority has been obtained, the Contractor shall give said party due notice of its intention to begin work, and shall give said party convenient access during the Contractor’s work. When two or more contracts are being executed at one time on the same or adjacent land in such manner that work on one contract may interfere with that on another, the City shall determine the sequence and order of the Work. When the territory of one contract is the necessary or convenient means of access for the execution of another contract, such privilege of access or any other reasonable privilege may be granted by the City to the Contractor so desiring, to the extent, amount, in the manner, and at the times permitted. No such decisions as to the method or time of conducting the Work or the use of territory shall be made the basis of any claim for delay or damage, except as provided for temporary suspension of the Work.
1.3 PROTECTION OF SURVEY MONUMENTS OR ROADWAY MARKERS
A. Monuments placed by Surveyors must be preserved, in accordance with State Business & Professions Code section 8771. The Contractor shall not destroy, remove, or otherwise disturb any existing survey monuments, markers or other existing street or roadway markers without proper authorization. No pavement grinding, breaking or excavation shall be started until all survey or other permanent marker points that will be disturbed by the construction operations have been properly referenced for easy and accurate restoration. It shall be the Contractor's responsibility to notify the proper representatives of the City of the time and location that work will be done. Such notification shall be sufficiently in advance of construction so that there will be no delay due to waiting for survey points to be satisfactorily referenced for restoration.
B. If monuments are disturbed by the Contractor, the Contractor shall hire a licensed surveyor to prepare and process a corner record or record of survey as appropriate through the City to reset the monuments. Surveyor records shall show the position of replacement monuments and post construction position of other monuments within the work area post-construction. The cost of preparing the necessary survey documents, processing the survey documents, and resetting the monuments shall be paid for by the Contractor. This work shall be completed prior to project acceptance and additional monies will be withheld for this work prior to the release of retention.
1.4 RESTORATION OF PAVEMENT
A. General: All paved areas including asphaltic concrete berms cut or damaged during construction shall be replaced with similar materials and of equal thickness to match the existing adjacent undisturbed areas, except where specific resurfacing requirements have been called for in the Contract
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Documents or in the requirements of the agency issuing the permit. All temporary and permanent pavement shall conform to the requirements of the affected pavement owner. All pavements which are subject to partial removal shall be neatly saw cut in straight lines.
B. Temporary Trench Restoration: Wherever required by the public authorities having jurisdiction, the Contractor shall place temporary surfacing promptly after backfilling and shall maintain such surfacing for the period of time fixed by said authorities before proceeding with the final restoration of improvements. The typical trench detail on the plans provides further information for temporary asphalt surfacing.
C. Permanent Trench Restoration: In order to obtain a satisfactory junction with adjacent surfaces, the Contractor shall saw cut back and trim the edge so as to provide a clean, sound, vertical joint before permanent replacement of an excavated or damaged portion of pavement. Damaged edges of pavement along excavations and elsewhere shall be trimmed back by saw cutting in straight lines. All pavement restoration and other facilities restoration shall be constructed to finish grades compatible with adjacent undisturbed pavement.
The typical trench detail on the plans provides further information for permanent trench restoration.
D. After all infrastructure has been installed and tested, and final approval of all testing has been provided by the City or its representative, the Contractor shall overlay all roadways affected by the Work per the drawings and Specification 321216, “Paving Systems.”
E. Restoration of Sidewalks or Private Driveways: Wherever sidewalks or private roads have been removed or damaged during construction, the Contractor shall place suitable temporary sidewalks or roadways promptly after backfilling and shall maintain them in satisfactory condition for the period of time fixed by the authorities having jurisdiction over the affected portions before proceeding with the final restoration or, if no such period of times is so fixed, the Contractor shall maintain said temporary sidewalks or roadways until the final restoration thereof has been made.
1.5 EXISTING UTILITIES AND IMPROVEMENTS
A. General: The Contractor shall protect all Underground Utilities and other improvements which may be impaired during construction operations. It shall be the Contractor's responsibility to ascertain the actual location of all existing utilities and other improvements that will be encountered in its construction operations, and to see that such utilities or other improvements are adequately protected from damage due to such operations. The Contractor shall take all possible precautions for the protection of utility lines to provide for uninterrupted service and to provide such special protection as may be necessary. Protection of existing utilities may include soil stabilization.
B. Culverts: Existing culverts in and adjacent to the work area shall be protected from disturbance by the Contractor’s activities relating to the Work. The Engineer
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shall be notified immediately if an existing culvert is disturbed as a result of construction activities. All costs associated with disturbing existing culverts shall be borne by the Contractor.
C. Utilities to be Moved: In case it shall be necessary to move the property of any public utility or franchise holder, such utility company or franchise holder will, upon request of the Contractor, be notified by the City to move such property within a specified reasonable time. When utility lines that are to be removed are encountered within the area of operations, the Contractor shall notify the Engineer a sufficient time in advance for the necessary measures to be taken to prevent interruption of service.
D. Where the proper completion of the Work requires the temporary or permanent removal and/or relocation of an existing utility or other improvement which is shown the Contractor shall remove and, without unnecessary delay, temporarily replace or relocate such utility or the facility. In all cases of such temporary removal or relocation, restoration to former location shall be accomplished by the Contractor in a manner that will restore or replace the utility or improvement to its former location and in new condition.
E. City's Right of Access: The right is reserved to the City and to the owners of public utilities and franchises to enter at any time upon any public street, alley, right-of-way, or easement for the purpose of making changes in their property made necessary by the Work of this Contract.
F. Underground Utilities Shown or Indicated: Existing utility lines that are shown or the locations of which are made known to the Contractor prior to excavation and that are to be retained, and all utility lines that are constructed during excavation operations shall be protected from damage during excavation and backfilling and, if damaged, shall be immediately repaired by the Contractor.
G. Underground Utilities Not Shown or Indicated: Contractor is responsible to verify location of all utilities, whether shown in the plans or not. All costs for locating, replacement and/or repair of existing utilities shall be borne by the Contractor.
H. In the event that the Contractor damages any existing utility lines, a written report thereof shall be made immediately to the Engineer.
I. All water services that are damaged during construction of trenching operations shall be reconstructed from the corporation stop to the meter (for small diameter services or reconstructed from the gate valve to the meter (for larger diameter services), and all services shall be sleeved with PVC pipe prior to backfilling.
J. Approval of Repairs: All repairs to a damaged improvement are subject to inspection and approval by an authorized representative of the improvement owner before being concealed by backfill or other work.
K. Maintaining in Service: All oil and gasoline pipelines, power, and telephone or other communication cable ducts, gas and water mains, irrigation lines, sewer lines, storm drain lines, poles, and overhead power and communication wires
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and cables encountered along the line of the Work shall remain continuously in service during all the operations under the Contract, unless other arrangements satisfactory to the Engineer are made with the owner of said pipelines, duct, main, irrigation line, sewer, storm drain, pole, or wire or cable. The Contractor shall be responsible for and shall repair all damage due to the Contractor’s operations, and the provisions of this Section shall not be abated even in the event such damage occurs after backfilling or is not discovered until after completion of the backfilling.
L. Pipeline Connections. The Contractor shall make all necessary connections to the existing pipelines. No connections to the existing system shall be made unless authorized in writing by the City or Engineer.
M. Repair couplings on sanitary sewer laterals and water services are not allowed.
All repairs shall be completed to the nearest existing pipe joint, asbestos cement (ACP) sanitary sewer laterals shall be taken back to the nearest existing joint and shall not be cut ACP. All removed pipe material shall be disposed of by the Contractor per State and local requirements. All costs for disposal of existing materials shall be borne by the Contractor.
1.6 TREES WITHIN STREET RIGHTS-OF-WAY AND PROJECT LIMITS A. General: The Contractor shall exercise all necessary precautions so as not to damage or destroy any trees or shrubs, including those lying within street rights- of-way and project limits, and shall not trim or remove any trees unless such trees have been approved for trimming or removal by the City or other jurisdictional agency. All existing trees and shrubs which are damaged during construction shall be trimmed or replaced by the Contractor under the directions of an arborist certified by the Western Chapter of the International Society of Arboriculture hired by the Contractor or a certified tree company hired by the Contractor to the satisfaction of the City and/or agency. Tree trimming and replacement shall be accomplished in accordance with the following paragraphs.
B. Trimming: The natural shape and form of the tree shall be preserved and enhanced; no stubs or splits or torn branches left; no topping or drop crotching; and clean cuts shall be made close to the trunk or large branches.
C. Replacement: The Contractor shall immediately notify the City and/or other jurisdictional agency if any tree is damaged by the Contractor's operations. If, in the opinion of the City or said other agency, the damage is such that replacement is necessary, the Contractor shall replace the tree at its own expense. The size of the trees shall be not less than 1-inch diameter nor less than 6 feet in height.
Fines will be assessed against the Contractor for trees removed without the City's prior written approval. The minimum amount of fine or restitution to the City will be the replacement of the tree removed, with one of equal or greater size and maturity and as approved by the City. Larger fines may be assessed against the Contractor depending upon the circumstances and type of tree removed, especially in the case of oak trees, and/or those trees listed on the
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City of San Carlos' and/or County of San Mateo’s Historical Tree Lists.
D. Any roots encountered greater than 2-inches in diameter shall be performed under the direct supervision of and in conformance with the recommendations of an arborist certified by the Western Chapter of the International Society of Arboriculture.
E. The Contractor shall furnish all tools and equipment and employ sufficient trained personnel to operate all equipment and perform all handwork efficiently and skillfully.
F. The Contractor shall be held responsible for any damage to trees, vegetation, or private property caused by its construction operations.
1.7 NOTIFICATION BY THE CONTRACTOR
A. Prior to any excavation in the vicinity of any existing underground facilities, including all water, sewer, storm drain, gas, petroleum products, or other pipelines; all buried electric power, communications, or television cables; all traffic signal and street lighting facilities; and all roadway and state highway rights-of-way the Contractor shall notify the Underground Service Alert agency and the respective authorities representing the owners or agencies responsible for such underground facilities not less than 48 hours prior to excavation so that a representative of said owners or agencies can be present during such work if they so desire.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 020010 – SITE CONDITIONS
PART 1 GENERAL
1.1 INFORMATION ON SITE CONDITIONS
A. Information obtained by the City regarding site conditions, subsurface information, existing construction of site facilities and similar data will be available to prospective Bidders upon request at the office of the Engineer, prior to bid opening. This geotechnical investigation is not a part of this Contract. The investigation was performed for design purposes.
B. Investigations conducted by Geotechnical Engineer of subsurface conditions were made for the purpose of study and design, and neither the Engineer nor the City assume any responsibility in respect to the sufficiency or accuracy of the soil borings, or of other investigations that have been made, or of the interpretations made thereof, and there is no warranty or guarantee, either expressed or implied, that the conditions indicated by such investigations are representative of those existing throughout such area, or any part thereof, or that unforeseen for developments may not occur.
C. Any logs of test borings, pits, geotechnical reports, or topographic maps showing a record of the data obtained by the Engineer's investigations of surface and subsurface conditions that are made available, shown on the plans, or bound herewith shall not be considered a part of the Contract Documents, said logs representing only the opinion of the Engineer as to the character of the materials encountered by him in his investigations and are provided only for the convenience of the Bidders.
D. Information derived from inspection of logs of test borings, pits, topographic maps, geotechnical reports, or from Plans showing locations of utilities and structures will not in any way relieve the Contractor from any risk, or from properly examining the site and making such additional investigations as he may elect, or from properly fulfilling all the terms of the Contract Documents.
1.2 CONTRACTOR'S RESPONSIBILITIES
A. The Contractor shall satisfy himself as to the nature and location of the Work, the general and local conditions, particularly those bearing upon availability of transportation, disposal, limited access to site, handling and storage of materials, availability of labor, water, electric power, roads, and uncertainties of weather, river stages, or similar physical conditions at the site, the conformation and conditions of the ground, the character of equipment facilities needed preliminary to and during the prosecution of the Work and all other matters which can in any way affect the Work or the cost thereof under this Contract.
B. The Contractor shall further satisfy himself as to the character, quality, and quantity of surface and subsurface materials to be encountered during the course of execution of the work by inspecting the site as well as, any exploratory work
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performed by the Engineer, and information presented by the Plans and Specifications made a part of this Contract. Any failure by the Contractor to acquaint himself with all available information will not relieve him from responsibility for properly estimating the difficulty or cost of successfully performing the Work. The Contractor shall use their own judgment in determining methods for safe construction, with awareness of the specific site conditions for this project.
C. The Contractor shall anticipate underground obstructions such as utility lines, concrete, water table, soil conditions and debris. No extra payment will be allowed for the removal, replacement, repair or possible increased cost associated with existing utilities, trench instability or groundwater. Any utility lines or obstructions indicated on the map show only the approximate location and must be verified in the field by the Contractor. Even excavations that do not daylight into the limits of existing trench backfill can become unstable due to the effects of ground disturbance and reduced strength caused by past nearby excavations and backfills. The Contractor is responsible for locating all underground obstructions.
D. The Contractor shall note that heavy truck and equipment operations may cause roadway damage in excess of normal usage. Damage caused to the streets, curbs, gutters, sidewalks or bike path by the Contractor's operations shall be repaired to a condition equal or better than the original condition at the Contractor's expense.
1.3 ADDITIONAL INFORMATION
A. Prior to bidding, Bidders may make their own subsurface investigations subject to time schedules and arrangements approved in advance by the City. Before any subsurface test holes are excavated, obtain necessary permits to perform such work.
B. Record drawings of existing utilities are available for examination at City offices.
1.4 SURFACE FACILITIES
A. The Contractor is advised that the Plans were prepared based on available information and, therefore, all existing surface facilities may not be shown on the Plans. It is the Contractor's responsibility to acquaint himself with existing site conditions per this Section and anticipate those surface facilities which are typically encountered (fences, signs, mailboxes, sidewalks, driveways, ditches, AC pavement, AC dikes, curbing, power poles, overhead lines, landscaping, irrigation, etc.) and will affect the Work. The Contractor shall provide adequate security to protect the public and Work. No extra payment will be made to the Contractor for the repair, removal and replacement of such facilities. Full payment for this work shall be as included in the various bid items.
PART 2 PRODUCTS
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Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 020030 – EXISTING UTILITIES AND UNDERGROUND STRUCTURES PART 1 GENERAL
1.1 SECTION INCLUDES
A. Refer to plans for the locations of utilities and underground structures.
B. Contractor’s responsibilities.
1.2 CALIFORNIA ADMINISTRATIVE CODE
A. Section 1540(a)1 of Construction Safety Orders (Title 8) California Administrative Code, section 1540 states:
(1) “Prior to opening and excavation, effort shall be made to determine whether underground installations; i.e., sewer, water, gas, electric lines, storm drain, cable TV, telephone, and fiber optics, will be encountered and, if so, where such underground installations are located. When an excavation approaches the approximate location of such an installation, the exact location shall be determined by careful probing or hand digging; and, when it is uncovered, adequate protection shall be provided for the existing installation. All known owners of underground facilities in the area concerned shall be advised of proposed work at least 48 hours prior to the start of actual excavation.”
B. The approximate location of public utilities and underground structures was based on information provided by the utility owners. However, in accordance with California's Administrative Code, Section 1540, Contractor shall make the effort to determine the exact location of underground installations.
1.3 PUBLIC UTILITIES AFFECTED
A. Electrical: Pacific Gas & Electric Company. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For underground utility location call Underground Service Alert (USA) at (800) 227-2600 or 811 at least two working days in advance.
B. Natural Gas: Pacific Gas & Electric Company has jurisdiction over natural gas lines. For underground utility location call Underground Service Alert (USA) at (800) 227-2600 or 811 at least two working days in advance.
C. Water Service: California Water Service Company and Mid-Peninsula Water District have jurisdiction over water mains and services within the specific limits of the project corridor.
D. Drainage: The City of San Carlos has jurisdiction over drainage within the corporate limits of San Carlos.
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E. Roads: The City of San Carlos has jurisdiction over roads inside the corporate limits of San Carlos and the County of San Mateo for roads outside the corporate limits of San Carlos.
F. Cable Television: Comcast. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For underground utility location, call USA at (800) 227-2600 or 811 at least two working days in advance.
G. Telephone: AT&T. It should be noted that where overhead service to a structure known to receive service does not exist, then underground service shall be assumed to exist. For assistance with location of underground telephone facilities, call USA at (800) 227-2600 or 811 at least two working days in advance.
H. Sanitary Sewer: The City of San Carlos has jurisdiction over the sewer mains and laterals within the specific limits of the project corridor.
I. Recycled Water: The City of San Carlos has jurisdiction over the recycled water mains and laterals within the specific limits of the project corridor.
1.4 CONTRACTOR RESPONSIBILITY
A. The Contractor shall anticipate water, reclaimed water, sewer, storm drain, electrical, gas, cable TV, and telephone services. It may be expected that there will be variation in location from that as shown on the Plans to the actual location.
Actual location shall be determined in the field after pre-marking by the various utilities affected.
B. It should be understood that the various utilities are indicated on the Plans to show only the approximate location and must be verified in the field by the Contractor. The various utility agencies will cooperate with the Contractor to endeavor to familiarize him with all known underground utility obstructions, but this will not relieve the Contractor from full responsibility in anticipating and locating their actual existence. No extra payment will be allowed for the removal, replacement, repair, or possible increased cost caused by inadvertent or planned interception and breaking of underground obstructions which may exist.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used
END OF SECTION
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SECTION 021100 – SITE PREPARATION
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Remove and dispose of surface debris.
B. Prior to any excavation, obtain permission from the City, PG&E and/or any other affected utility providers to penetrate or excavate surfaces along the project route. Remove and dispose of paving, curbs, gutters, fences, posts, or structures indicated on the drawings.
C. Soil stabilization.
1.2 RELATED SECTIONS
A. Section 013100 – Coordination
B. Section 015600 – Protection of Existing Facilities
1.3 REGULATORY REQUIREMENTS
A. Conform to applicable codes and all local, state and federal regulations for disposal of debris and use of herbicides. Burning of debris, lumber or scrap will not be permitted.
PART 2 PRODUCTS
2.1 MATERIALS
A. Not used.
PART 3 EXECUTION
3.1 PREPARATION
A. Sawcut paving, curbs gutters and other structures between portion to remain and portion to be removed.
B. The existing subgrade material shall be watered or scarified to obtain optimum moisture content and compacted to a relative compaction as specified to a depth of 6” below top of subgrade. Subgrade shall be graded to within 0.05’ of the grade established by the Engineer.
3.2 OTHER IMPROVEMENTS
A. Protect trees, plant growth, and features designated to remain, as final landscaping.
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B. Protect bench marks and existing structures which are to remain from damage or displacement.
3.3 REMOVAL
A. Remove debris, rock, soil and extracted plant life from site. Dispose of materials at approved facilities.
END OF SECTION
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SECTION 024100 - DEMOLITION
PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
Demolition & Permits
Removal and Disposal
Recycling & Salvaging
1.2 UNIT PRICE - MEASUREMENT AND PAYMENT
A. Demolition:
1. Basis of Measurement: Not a measured item, unless specified otherwise on the Drawings.
2. Basis of Payment: The cost of any works that relevant to demolition shall be considered as included in the contract prices for the various contract items of work involved, and no additional compensation shall be allowed therefor.
1.3 REFERENCES & RELATED WORK SPECIFIED ELSWHERE
A. Bay Area Air Quality Management District (BAAQMD) – http://www.baaqmd.gov/
1. Regulation 11 (Hazardous Pollutants) and Rule 2 (Asbestos Demolition, Renovation, and Manufacturing).
B. CALGreen Construction Waste Management Requirements
1. http://www.calrecycle.ca.gov/LGCentral/Library/CandDModel/Instruction/CALGre enTbl.pdf
C. California Occupational Safety and Health (Cal/OSHA)
1. General Requirements
D. Commercial
1. USA Underground Service Alert
E. Division 1
1. General Requirements
1.4 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
B. The Contractor shall submit to the City a haul route for approval, prior to commencing any work. Truck traffic movement is limited between the hours of 9am to 3pm, unless approved by the Project Manager.
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C. Before disposing of any demolished material prior to any work
1. Submit a written agreement from the property owner
a. For the use of the property
b. absolving the City from responsibility in connection with the property.
2. Obtain authorization to start
D. Before Contract acceptance, submit a document signed by the owner of the material disposal site stating that the Contractor has complied with the Contractor-Owner agreement.
E. Demolition Schedule: The Contractor shall submit a complete coordination schedule for demolition work including shut-off and continuation of utility services prior to start of the work. The schedule shall indicate proposed methods and operations of facility demolition, and provide a detailed sequence of demolition and removal work to ensure uninterrupted operation of occupied areas.
F. All affected private properties will receive door hanger notices as specified in Section 015050 “Mobilization” prior to any utility shutoffs or frontage demolition and improvements.
1.5 JOB SITE CONDITIONS
A. The Contractor shall visit the site and inspect the existing facilities. The City assumes no responsibility for actual condition of facilities to be demolished.
B. Contractor shall use all means necessary to prevent the spread of dust during performance of the work. Thoroughly moisten all surfaces as required to prevent the generation of dust. No washing of streets is permitted.
C. All liquid, and slurry generated during pavement sawcutting shall be collected and removed from the site. These liquids shall not be washed into the area storm drainage system.
D. Contractor shall remove hazardous materials as described per the Project Asbestos and Lead Inspection Report.
E. The Contractor prior to the commencement of the demolition or renovation, thoroughly inspect the affected facility or part of the facility where the demolition or renovation operation will occur for the presence of asbestos, including Category I and Category II nonfriable Asbestos Containing Materials (ACM).
F. The Contractor must also provide the Environmental Protection Agency (EPA) with a 10 working day advance notice for any disturbance of Regulated Asbestos-Containing Material (RACM) greater than 160 square feet or 260 lineal feet, and as specified in Code of Federal Regulations (CFR) Title 40, Chapter I, Subchapter C, Part 61, Subpart M, Section 61.145.
PART 2. PRODUCTS (NOT USED)
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PART 3. EXECUTION
1.6 INSTALLATION
A. Notify anyone to be affected by demolition and construction activities including but not limited to: all schools, residences, businesses, garbage collection, utility companies (PG&E-Gas Distribution, PG&E Gas Transmission, PG&E-Electric, AT&T, Comcast, etc.), the Owner, etc. at least ten (10) working days prior to commencing the work of this section.
B. Site Inspection:
1. Prior to all work of this section, carefully inspect the site and all objects designated to be removed and to be preserved.
2. Locate all existing active utility lines traversing the site and determine the requirements for their removal and/or protection.
C. Clarification:
1. The Drawings do not purport to show all objects existing on the site.
2. Before commencing the work of this section, verify with the Owner all objects to be removed and all objects to be preserved
D. Scheduling:
1. Schedule all work in a careful manner with all necessary consideration for neighbors, operation of the existing facilities, and the public.
2. Avoid interference with the use of, and passage to and from, residences and adjacent facilities.
E. Protection of Utilities: Preserve in operating condition all active utilities traversing the site and designated to remain.
1.7 WATER 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 air. The Contractor shall comply with all government regulations pertaining to environmental protection.
B. The Contractor shall use equipment that will generate the least amount of dust. The Contractor shall provide dust control at all times including Saturdays, Sundays, and holidays unless directed otherwise by the Project Manager.
C. Whenever the Contractor, in the opinion of the Project Manager, is negligent in controlling dust, the Project Manager may direct attention to the existence of a dust hazard and instruct the Contractor to immediately alleviate the dust hazard. The Contractor shall be responsible for any damage cause by dust generated as a result of the Contractor’s operations.
D. The Contractor shall have a commercial standard street vacuum/sweeper operational and in operation during each working day. The street vacuum/sweeper shall be able to
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pick up sand, gravel, dust, and debris, and other things, shall minimize dust generation, and shall also be available during the day and shall sweep as outlined below and as directed by the Project Manager.
E. If the Contractor is performing work that generates dust and debris then during the day (including weekends and holidays) the sweeper shall sweep the project area (full length, width, and all lanes) twice a day sometime between 9:00a.m. and 11:00a.m. and also between 2:00p.m. and 4:00p.m. Hardscape surfaces (including pavers, sidewalks, and areas inaccessible by a mechanical sweeper) shall have dirt, dust, and debris removed by hand sweeping. If the Contractor fails to fulfill the responsibilities of this section, the City will perform or contract with others to perform the work and all costs incurred to the City shall be withheld from future payments to the Contractor.
F. The Contractor shall clean the sidewalk and gutter as many times as needed to make sure the sidewalk and gutter are out of dirt, debris and small rocks at all times. The Contractor shall be prepared to sweep surfaces immediately at the request of the Project Manager, should the Project Manager deem it necessary for public safety and to avoid damage to properties. If streets are not satisfactorily cleaned within 12 hours from verbal or written notice by City personnel, the City will hire an independent sweeping company and deduct the cost for such work from payments due to the Contractor.
G. Water shall not be used in a manner that creates hazardous or objectionable conditions such as ice, flooding, or pollution.
H. The site shall be kept neat and orderly during the demolition to the maximum extent practical.
I. Public right-of-way and private property shall be kept free of debris at all times.
J. Stockpiles of demolished items or materials shall be removed from the site on a daily basis or stored in waste containers which shall be emptied on a weekly basis or as conditions require in order to manage the accumulation of waste.
K. Accumulations of flammable materials shall not be permitted.
1.8 PROTECTION
A. Safe passage of persons around area of demolition shall be provided in accordance with all safety and regulatory requirements. Operations shall be conducted to prevent damage to adjacent buildings, structures, other facilities, people and property. Safe passage provided by Contractor will be ADA complaint.
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 which are not to be demolished shall be protected and maintained as necessary.
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D. The Contractor shall repair any landscaping and irrigation system removed or damaged as a result of the Contractor's operation or where proposed improvements are a conflict.
Active irrigation lines necessary for landscaping shall be relocated and made operational within 48 hours of their removal.
E. The Contractor shall protect and maintain conduits, drains, sewers, pipes and wires that are not to be demolished.
F. Use all means necessary to protect existing objects designated to remain or to be preserved must remain operational during installation of the replacement pipeline. In the event of damage, immediately notify the Owner and make all repairs and replacements necessary for approval by the Owner at no additional cost to the Owner.
1.9 SURFACE DEMOLITION
A. All asphalt concrete and all Portland cement concrete curbs, gutters, sidewalks, access ramps and driveways shall be saw-cut at the nearest scoreline or deep joint and removed entirely to the saw-cut limits.
B. Where adjacent pavement or concrete is broken or damaged sufficiently to prohibit a sound replacement the entire damaged section shall be removed to the limits determined by the Project Manager.
C. Asphalt concrete, sidewalk, concrete curb, and gutter materials to be demolished shall be broken up and removed from the site by the Contractor at no additional cost to the City.
D. Where shown on the Drawings, the Contractor shall remove required pavement section including base material. Subsoil removal is also included where required to achieve design subgrade.
1.10 DEMOLITION BELOW THE SURFACE
A. Existing structures, pavement slabs and structural sections to be abandoned shall be demolished to an elevation three feet below finished grade. Their bottoms (if any remain) shall be broken thoroughly to prevent entrapment of water and all voids backfilled with suitable backfill
B. Demolition areas and voids resulting from demolition of structures below the surface shall be completely filled.
C. All fill, compaction, and holes created by demolition work shall be backfilled with imported clean fill. Lay fill down in layers not exceeding 6” thickness and compact per the earthwork specifications. Grade the site to drain to the nearest storm drainage system without any low points.
D. All fill and compaction surfaces shall be graded to meet adjacent contours and to provide flow to surface drainage structures, or as shown on the Drawings.
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E. Pipes to be demolished that require no future connection shall be removed to the extent required, sealed and capped. Pipe sections shall be removed by removing a complete pipe section to an existing joint, or other adequate means which results in a clean joint.
F. The Contractor shall demolish or dismantle and remove all items that are noted for demolition and removal in the Contract Documents and that will interfere with the planned construction, or as otherwise directed by the Project Manager.
G. The Contractor shall demolish or dismantle and remove all abandoned conduits or structures that are encountered during the prosecution of the work and which interfere with the construction of the work upon the approval of the Project Manager.
1.11 REMOVAL OF EXISTING WATER AND SEWER SERVICES
A. GENERAL ABANDONMENT:
1. When salvage materials are shown on the Drawings; salvage and arrange the existing facilities (i.e., meters, manhole covers, manhole frames, etc.) to be dropped off at the City's Corporation Yard by prior arrangement.
2. Properly remove or abandon in place unused existing City utility service lines discovered that were left in place by others.
3. Contact utility companies for removal, abandonment, adjustment or relocation of their facilities.
4. Contractor is responsible for verifying the location of any existing utilities.
5. Abandonment of pipes will include filling pipe with slurry as specified in Section 19-
3.02G – Controlled Low-Strength Material of the State Standard Specification and capping the pipes at the ends.
1.12 DISPOSAL OF DEMOLISHED MATERIALS
A. Demolition and removal of debris shall be conducted to ensure minimum interference with roads, streets, walks and other adjacent occupied or used facilities which shall not be closed or obstructed without permission from the City. Alternate routes shall be provided to circumvent closed or obstructed traffic ways.
B. The Contractor shall comply with all pertinent regulations of Cal/OSHA and local codes and practices.
C. All existing materials that are designated to be salvaged shall be removed, cleaned and hauled to the City Corporation Yard, unloaded and stockpiled unless otherwise directed by the Project Manager.
D. Site debris, rubbish and other materials resulting from demolition operations shall become the property of the Contractor and shall be removed by the Contractor at the Contractor's expense. The proper and legal disposal of demolished materials shall be the responsibility of the Contractor. All disposal sites and recycling facilities shall be approved by the City prior to initiation of the Work.
1. Concrete debris shall be transported to a recycler of such materials.
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2. Hazardous materials shall be handled and disposed of in accordance with all applicable laws, codes, and regulations.
1.13 PATCHING AND REPAIRING
A. The Contractor shall provide patching, replacing, repairing and refinishing of damaged areas or damaged adjacent facilities involved in the demolition.
B. New concrete shall match the existing adjacent surfaces, in kind, or of better quality, to the satisfaction of the Project Manager, at no cost to the City or to the owners of the facilities.
1.14 CLEAN UP
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 work in a clean, approved condition.
B. The Contractor shall clean adjacent structures and facilities of dust, dirt and debris caused by demolition, as directed by the Project Manager, and return adjacent areas to condition existing prior to start of work.
C. The Contractor shall clean and sweep daily all street and roads affected by its operation.
END OF SECTION
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SECTION 310513 – CLEARING & GRUBBING, EXCAVATION, AND EARTHWORK PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
1. Clearing and Grubbing
2. Excavation
3. Earthwork
4. Grading and Compaction
5. Subsoil materials – Import Fill and Select Fill
6. Topsoil materials.
B. Related Sections:
1. Project Geotechnical report; bore hole locations and findings of subsurface materials if applicable.
1.2 REFERENCES
A. American Association of State Highway and Transportation Officials:
1. AASHTO T180 - Standard Specification for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop.
B. ASTM International:
1. ASTM D698 - Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft-lbf/ft3).
2. ASTM D1557 - Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft3).
3. ASTM D2487 - Standard Classification of Soils for Engineering Purposes (Unified Soil Classification System).
C. California Building Code – Appendix J - Grading
D. State Standard Specifications:
1. Section 14 – Environmental Stewardship
2. Section 17 - General
3. Section 19 – Earthwork
1.3 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
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B. Samples: Submit results of the soil samples by a certified testing laboratory prior to importing onto the site for approval by the Project Manager.
C. Materials Source: Submit name of imported materials source.
D. Manufacturer's Certificate: Certify Products meet or exceed specified requirements.
1.4 QUALITY ASSURANCE
A. Furnish each subsoil material from single source throughout the Work.
PART 2. PRODUCTS
2.1 SUSTAINABILITY CHARACTERISTICS
A. Materials and Resources Characteristics:
1. Regional Materials: Furnish materials extracted, processed, and manufactured within 250
miles of jobsite.
2.2 SUBSOIL MATERIALS
A. Select Fill Material:
1. Subsoil material is on-site excavated material.
2. Graded
3. Non-hazardous
4. Free of lumps larger than three (3) inches, rocks larger than two (2) inches, organic matter, frozen or other deleterious materials and debris.
5. Selected material encountered in excavation within the right of way shall be used for finishing the top portion of the roadbed, constructing shoulders, structure backfill; as shown on the Drawings; as specified in the Special Provisions, or as directed by the Project Manager.
B. Import Fill Material:
1. Subsoil material imported from sources outside the project site meeting.
2. Graded
3. Non-hazardous
4. Free of lumps larger than three (3) inches, rocks larger than two (2) inches, organic matter, frozen or other deleterious materials and debris.
5. Unless otherwise specified, the Contractor shall obtain from the owners the right to procure material, pay all royalties and other charges involved, and bear all expense of developing the sources, including rights of way for hauling.
6. No import fill material shall be delivered to the site until approved by the Project Manager. Approval of import fill material shall be based on the testing of representative samples submitted by the contractor meeting the appurtenant Geotechnical Report and approved by the Project Manager. Such representative
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samples shall be submitted to the Project Manager not less than 15 days prior to commencing the work.
7. Imported fill, delivered to the site, that significantly differs from the submitted samples shall be subject to rejection. Rejected materials shall be removed from the site at the Contractor's expense
8. Approval of a particular import fill material shall constitute approval of only that portion of the proposed borrow source represented by the submitted sample.
9. Except as otherwise permitted, borrow pits and other excavation areas shall be excavated in such manner as will afford adequate drainage. Overburden and other spoil material shall be transported to designated spoil areas or otherwise disposed of as directed, local borrow pits shall be neatly trimmed and left in such shape as will facilitate accurate measurement after the excavation is completed.
2.3 FILL MATERIALS:
A. Fill material shall conform to the following as determined by ASTM C 117 and ASTM C 136:
1. Maximum particle size 3 inches
2. Percent passing 1-inch sieve 90-100 percent
3. Percent passing No. 200 sieve less than 20 percent
B. Imported non-expansive fill shall consist of a well-graded, slightly cohesive soil with relatively impervious characteristics when compacted.
C. Plasticity Index for acceptable import fill materials shall be a maximum of 15 when determined by the procedure set forth in ASTM D 4318.
D. The liquid limit shall not exceed 40 percent as de termined by the procedures set forth in ASTM D 4318.
E. Import fill material shall have an R-value of 25 o r greater as determined by ASTM D 2844.
2.4 TOPSOIL MATERIALS
A. Topsoil shall be imported top soil.
B. Topsoil excavated within the limits of the project, as approved by the Engineer, will be considered as a material only for the purpose of backfilling areas to be planted.
2.5 SOURCE QUALITY CONTROL
A. Testing and Analysis of Subsoil and Topsoil Materials: Perform in accordance with ASTM D698, ASTM D1557, and AASHTO T180.
B. When tests indicate materials do not meet specified requirements, provide alternate materials and retest.
C. Furnish materials of each type from same source throughout the Work.
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PART 3. EXECUTION
3.1 PREPARATION
A. Call USA not less than two (2) working days before performing Work that can be marked by USA in a timely manner.
B. Request underground utilities to be located and marked within and surrounding construction areas.
C. Identify required lines, levels, contours and datum.
D. Notify utility companies to remove and relocate utilities where shown on the Drawings.
E. Protect utilities indicated to remain from damage.
F. Protect plant life, lawns, and other features remaining as portion of final landscaping.
G. Protect benchmarks or monuments, survey control points, existing structures, fences, sidewalks, paving, and curbs from excavating equipment and vehicular traffic.
H. The ground shall be prepared to received select fill by removing vegetation, topsoil and other unsuitable materials, scarifying the ground to provide a bond with the fill material, and compacting the fill at optimum moisture content.
3.2 CLEARING AND GRUBBING
A. Clearing and grubbing shall be per Section 17-2 Clearing and Grubbing of the State Standard Specifications.
B. Clear and grub before performing earthwork in an area.
C. Do not injure standing trees, plants, and improvements shown to be protected.
D. Clear and grub the entire length of the job site to the following widths:
1. 5 feet outside of excavation and embankment slope lines where slopes are not rounded
2. Outside limits of slopes where slopes are rounded
3. 5 feet outside of structures
4. 2 feet outside of slope lines for ditches and channels with a bottom width of less than 12 feet
5. 5 feet outside of slope lines for ditches and channels with a bottom width of 12 feet or more
E. Clearing and grubbing shall consist of removing all objectionable material from within the limits of the project. The limits of clearing and grubbing shall be of sufficient area and depth to complete the work shown on the Drawings or as described herein in.
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F. Clear all construction areas above original ground of the following to a minimum depth of eight (8) inches below subgrade or eight (8) inches below original ground, or as required by the appurtenant geotechnical report, whichever is lower:
1. all vegetation such as trees, logs, upturned stumps, roots of downed trees, brush, grass, and weeds and
2. other objectionable material including concrete, masonry, and debris.
G. No burning of materials is allowed.
H. The site shall be stripped and cleared of all vegetation, debris, and organic-laden top soil as required by the Engineer.
I. Trees within the limits of work including any traffic control work beyond the limits of work and within the area of influence shall be evaluated by the City or; a City approved certified Arborist to assess protection measures. No trees will be removed until they have been tagged, numbered and a written release for the tree has been issued by the City.
J. This project includes work on streets with mature trees adjacent to the proposed work. It is the responsibility of the Contractor to trim the tree branches as necessary.
Compensation for this work shall be included in the various other items of work and no separate payment will be made therefor.
K. Tree stumps which are designated to be removed, shall be excavated and removed 30” down to remove the tree trunk, roots, and backfill with fill material and compact as required in this section, unless specified otherwise on the Drawings. For tree removal located at Rockridge site, tree removal permit provided for reference in Appendix B.
L. Grub all construction areas to a depth of at least 0.50 feet, necessary to remove all existing tree stumps, roots, buried logs and other objectionable material, unless noted otherwise on the Plans. In embankment areas where the grading plane is 2 feet or more above original ground, cut off trees, stumps, and roots not more than 1 foot above original ground, except, remove trees, stumps, and roots completely where work includes any of the following:
1. Structure construction
2. Pile construction
3. Subdrainage trench excavation
4. Removal of unsuitable material
5. Cutting into slopes of original hillsides, old or new fill
6. Utility line construction
3.3 EXCAVATION
A. Work under this section shall consist of performing all operations necessary to excavate earth and rock, regardless of character and subsurface conditions, from the roadway prism or adjacent thereto, to excavate all materials, of whatever nature, necessary for the construction of foundations for structures and other facilities: to excavate drainage and irrigation ditches; to excavate drainage channels; to excavate selected material and import material for use as specified; to construct embankments including the placing of selected fill or import fill material in connection therewith as specified; to place backfill
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for structures, and other facilities; to backfill trenches and depressions resulting from the removal of obstructions; to backfill holes, pits and other depressions; to remove and replace unsuitable material; to excavate and grade road approaches, driveways, sidewalks, curb ramps, curb and gutters, plazas, parking lots, and connections; to construct protection dikes; to remove unstable material, slide material which has come into the graded area, and material which has slipped from embankments; all as shown on the plans and as specified in these Specifications and the Special Provisions and as directed by the Project Manager; and furnishing all labor, materials, tools, equipment and incidentals, and for doing all the work that may be required to construct and maintain the project facilities, except excavation, trenching and backfilling for pipe, culverts, utility systems, and other subsurface pipes.
B. Excavate subsoil and topsoil from areas designated. Strip topsoil to full depth of topsoil in designated areas.
C. Stockpile excavated material meeting requirements for subsoil fill materials and topsoil materials approved by the Project Manager.
D. If practicable and unless processing of material is required, haul selected material directly from the excavation to its final position in the roadway prism and compact it in place.
E. Excavate to the described or authorized grade. If the Contractor over excavates, backfill with an authorized material and compact it at the Contractor’s own expense.
F. Do not excavate wet subsoil unless directed by the Project Manager.
G. The temporary slope of cut surfaces shall be no steeper than is safe for the intended use, and shall not be more than one-unit vertical in two units horizontal (50-percent slope) unless approved by the Project Manager or appurtenant geotechnical report.
H. Archaeological Resources: Contractor shall conform to Section 14 – Environmental Stewardship of the State Standard Specifications. If archaeological resources are discovered within or near construction limits, do not disturb the resources and immediately:
1. Stop all work within a 60-foot radius of the discovery
2. Secure the area
3. Notify the Project Manager.
I. City will investigate the discovery. Do not move archaeological resources or take them from the job site. Do not resume work within the radius of discovery until authorized.
J. Environmentally Sensitive Areas (ESA): If an ESA is shown on the Drawings, the boundaries are approximate. Do not enter an ESA unless authorized. If an ESA is breached, immediately:
1. Stop all the work within 60 feet of the ESA boundary
2. Secure the area
3. Notify the Project Manager
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If an ESA is damaged, the Project Manager determines the necessary remediation and the party to perform the work. The City deducts the cost for this work from the Contractor bid price.
K. Notify the Project Manager when buried man-made objects are encountered in an excavation as part of the excavation work and wait for direction from Project Manager unless shown on the plans for removal. All surplus material shall be disposed offsite.
L. Remove excess excavated materials, subsoil and topsoil not intended for reuse, from site.
M. Remove excavated materials not meeting requirements for subsoil materials and topsoil materials from site.
N. When hauling is done over highways or City streets, and when directed by the Project Manager the loads shall be trimmed and all material removed from shelf areas of vehicles in order to eliminate spilling of material. If directed by the Project Manager, the loads shall be watered down or covered after trimming to eliminate dust.
O. Excavation shall include the satisfactory removal and disposition of all materials not classified as rock excavation.
P. Earth and rock, regardless of character and subsurface conditions, shall be excavated to the lines and grades as established by the plans.
Q. All existing materials that are designated to be salvaged shall be removed, cleaned and hauled to the City Corporation Yard, unloaded and stockpiled, by the Contractor unless otherwise directed by the Project Manager.
R. Existing pipes to be abandoned shall be filled with slurry, minimum of thirty (30) feet from either ends of the pipe and capped with concrete at the ends.
S. Existing structures, pavement slabs, and structural sections to be abandoned shall be demolished to an elevation three (3) feet below finished grade, unless specified otherwise on the Drawings. The bottom (if any remains) shall be broken thoroughly to prevent entrapment of water and all voids backfilled with suitable backfill.
T. Operations shall be conducted in such a manner that existing street, facilities, utilities, railroad tracks and other non-street facilities which are to remain in place will not be damaged.
U. The Contractor, at his expense, shall furnish and install-sheet piling, cribbing, bulkheads, shores or whatever means may be necessary to adequately support material carrying such facilities, or to support the facilities themselves, and shall maintain such supports until they are no longer needed. Temporary pavements, facilities, utilities and installations shall also be protected until they are no longer required. When temporary supports and other protective means are no longer required, they shall become the property of the Contractor and shall be removed and disposed of from the job site
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V. Prior to placing import fill material, all areas to receive fill shall be scarified and compacted. Unless otherwise stated in the appurtenant Geotechnical report, the area shall be scarified to a minimum of eight (8) inches, material shall be moisture conditioned by wetting or drying to optimum moisture content, and compacted.
3.4 ROCK EXCAVATION
A. Rock excavation shall include excavating, grading, and disposing of materials classified as rock and shall include the satisfactory removal and disposition of rock 1/2 cubic yard or more in volume.
B. No blasting is allowed.
3.5 GRADING
A. Grading shall consist of placing fill materials on site to contours and elevations with select fill or import fill materials.
B. Place fill material in continuous layers of maximum lifts of 8 inches (0.67 feet) and compact in accordance with schedule shown in this section, unless otherwise shown on the appurtenant Geotechnical Report.
C. Maintain optimum moisture content of fill materials to attain required compaction density.
D. Construct slopes to the lines and grades shown on the Drawings.
E. Slope grade away from the building minimum 2% slope for a minimum distance of 10 feet, unless noted otherwise.
F. Make grade changes gradual. Blend slopes into level areas.
G. Round the tops of excavation slopes and ends of excavation.
H. Maintain completed slopes. Repair any slopes damaged by erosion.
I. Repair or replace items indicated to remain that are damaged by excavation or filling.
J. Identify any site low points which need positive drainage and make adjustments with approval from Project Manager prior to pouring concrete.
K. Protection of existing slopes using erosion control measures as required in Section 015723 – Storm Water Pollution Prevention Plan.
3.6 TOLERANCES
A. Section 01 45 16 – Quality Control: Tolerances.
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B. Immediately before placing subsequent layers of material, prepare the grading plane such that the grading plane:
1. Does not vary more than 0.05 foot above or below the grade established by the Engineer where Hot Mix Asphalt (HMA) or aggregate base are to be placed.
2. Does not extend above the grade established by the Engineer where concrete base or pavement is to be placed.
3. Beneath structural approach slabs or the thickened portion of sleeper slabs do not extend above the grade established by the Engineer.
4. At any point is within 0.05 foot above the grade established by the Engineer if the material to be placed on the grading plane is paid by the cubic yard.
3.7 COMPACTION
A. Relative compaction specifications apply to material whether in an excavation or an embankment.
B. The moisture content of material to be compacted to at least 95 percent must be such that the specified relative compaction is attained.
C. Compact earthwork to a relative compaction of at least 95 percent for at least a depth of:
1. 0.5 foot below the grading plane for the width between the outer edges of shoulders
2. 2.5 feet below the finished grade for the width of the traveled way including any parking lots or other vehicular areas; to extend plus two (2) feet on each side.
D. All fill material shall be compacted to at least 90 percent of maximum density as determined by ASTM D1557, Modified Proctor, beyond the depth specified above in
3.7.C.
3.8 STOCKPILING
A. Stockpile materials on site will not be permitted unless authorized by Project Manager.
3.9 PROTECTION
A. Prevent displacement or loose soil from falling into excavation; maintain soil stability.
B. Protect bottom of excavations and soil adjacent to and beneath foundation from freezing.
C. Protect structures, utilities, and other facilities from damage caused by settlement, lateral movement, undermining, washout, and other hazards created by earth operations.
END OF SECTION
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SECTION 312333 – TRENCH EXCAVATION AND BACKFILL
PART 1 – GENERAL
1.01 WORK INCLUDED
A. It is the general intent of these specifications to specify conduct of the work in such manner as to cause the general public a minimum of inconvenience, with no exposure to unsafe conditions during construction, and to provide a trench that will properly support and protect the pipe and have no settlement on improved streets and only minor settlement in other areas where such settlement will not be noticed, or compensation made for any expected settlement. The degree of compaction and type of material will vary in accordance with type of pipe and soil and surface conditions.
B. In general, it is the City’s standard policy that no trenching will be allowed on a City Street until a period of five calendar years has expired from the previous time of trenching. In any case, when trenching occurs on a city street, the entire affected city block will be repaved in accordance with the Special Provisions and Project Plans.
C. Excavation of all earth, regardless of character and subsurface conditions, to the required lines and grade as shown on the plans for the installation of the subsurface pipelines, utilities, conduits, etc.
D. Shoring designed for general safety, worker protection, and protection of adjacent property from the hazards of caving ground shall be required for:
1. Trench excavations
2. Structural excavations
E. Control of ground water.
F. Backfill from the required pipe cover depth to subgrade.
G. Compaction as shown on the plans and as specified herein.
H. Restoration of traffic signals, conduits, detector loops and/or pavement markings damaged during construction.
1.02 RELATED REQUIREMENTS
A. City Standard Detail Drawing for Trenching and Backfill.
1.03 QUALITY ASSURANCE
A. All work under this section will be subject to the inspection and approval of both the Engineer and an approved geotechnical engineer registered in California.
Compaction testing either shall be performed by the geotechnical engineer or by a City approved independent testing laboratory under the supervision of a California
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registered geotechnical engineer.
B. The geotechnical engineer shall make enough visits to the site to insure ongoing familiarity with the progress and quality of the work. The geotechnical engineer shall make a sufficient number of field observations and tests to allow the forming of an opinion regarding the adequacy of the site preparation, the acceptability of the native or import fill material, and the extent to which the degree of compaction meets the specification requirements and the project needs.
C. Any fill where the site preparation, type of material, or compaction is not approved by the geotechnical engineer, shall be removed and/or re-compacted until the requirements are satisfied and approved by said geotechnical engineer. As required, fill material shall be tested for pollutants and certified for suitability by the geotechnical engineer.
D. Services of the geotechnical engineer and/or testing laboratory shall be retained by, and paid for by the Contractor. Testing or retesting caused by unsatisfactory contract operations shall be paid for by the Contractor.
E. The geotechnical engineer shall provide quality assurance reports as required and accepted by the Engineer.
1.04 PERMIT
A. For trenches or excavations five feet (5') deep or deeper, the Contractor shall obtain a permit for such excavation from the State Department of Industrial Relations, Division of Safety and Health (DOSH). The Contractor shall submit a copy of the permit to the Engineer prior to initiating any work requiring said permit.
1.05 ENGINEER'S REVIEW
A. The duty of the Engineer to conduct construction review of the Contractor's performance is not intended to include a review or approval of the adequacy of the Contractor's safety supervisor, the safety program, or any safety measures taken in, on, or near the construction site.
B. The Engineer will review the submittal of the Contractor's proposed shoring system to verify the general scope of the work, to determine that qualified professional engineering services are used and to determine that appropriate construction techniques are proposed for use. This review shall not, in any way, be construed to relieve the Contractor from sole responsibility for the design and safety of such shoring.
1.06 GUARANTEES
A. The Contractor shall guaranty his work against settlement for a minimum period of one (1) year after the Notice of Completion has been filed, and shall repair all damage caused by settlement within that time. For the purpose of these specifications, settlement will be deemed to have occurred if either of the following conditions exist:
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1. On paved streets, a depression of three-eighths of an inch (3/8") below the average of the sides of the uncut portion; or
2. Along shoulder areas and unpaved portions of the rights-of-way, a depression of three-quarters of an inch (3/4") below the average of the sides of the uncut portion.
PART 2 – PRODUCTS
2.01 BACKFILL REQUIREMENTS – GENERAL
A. See the applicable City Standard Drawings for typical pipe trench requirements and indication of placement limits for pipe bedding, initial backfill and subsequent backfill.
Unless otherwise specified, import materials shall not be used until suitable materials from contract excavation have been exhausted.
2.02 PIPE BEDDING AND BACKFILL FOR SEWER AND STORM MAINS A. Pipe bedding and backfill for Sewer and Storm mains shall be placed in accordance with City Standard Drawings.
2.03 SUBSEQUENT BACKFILL
A. Subsequent backfill Storm mains shall be placed in accordance with City Standard Drawings.
2.04 OTHER BACKFILL MATERIALS
A. Cement slurry, drain rock and other special earth-rock backfill materials shall be provided as specified in the Special Provisions, or directed and authorized.
PART 3 – EXECUTION
3.01 GENERAL
A. Unless otherwise indicated on the plans or in the special conditions, excavation shall be by open cut. Trenching machines may be used, except where their use will result in damage to existing facilities.
B. Trenches shall be excavated at least six inches (6") below the barrel of the pipe and the bottom re-filled with select imported material of the type specified. See applicable City Standard Drawings, for details of trench construction.
C. Whenever the maximum allowable trench width is exceeded for any reason, the Contractor shall concrete embed or otherwise cradle the pipe in a manner satisfactory to the Engineer.
D. Excavation shall be supported as set forth in the rules, orders, and regulations of the California Department of Industrial Relations, Division of Industrial Accidents. All shoring, sheeting, and bracing shall conform to the requirements of the State or local
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agents having jurisdiction over such matters. Shoring, sheeting, and bracing shall be removed in a manner that will protect the workers and prevent caving of banks and damage to the pipe, excavation, backfill or adjacent property. No sheeting will be withdrawn from below the top of the pipe after completion of backfill to that level.
E. The Contractor shall do all excavation of whatever substance is encountered to the lines and grades shown on the plans. All material suitable for use as backfill shall be piled in an orderly manner at a sufficient distance from the edge of the trench to avoid overloading and to prevent sliding into the trench. The Contractor shall do such grading or work as is necessary to prevent surface water from entering the excavation. Storage of equipment or material on street right of way shall not be allowed after normal working hours.
F. Except with specific approval of the Engineer, no more than one hundred feet (100') of open trench shall be excavated in advance of laying the pipe. Not more than twenty- five feet (25') of excavated trench shall remain un-backfilled at the end of each day's work. The remainder of the trench shall be backfilled, initially compacted, and opened to traffic. All operations shall be carried out in an orderly fashion. Backfilling, compacting and cleanup shall be accomplished as sections of the pipe are installed.
Traffic through the work area shall not be impeded or obstructed at any time.
G. Un-backfilled portions of trench shall be shored and covered each evening with steel trench plates, properly shimmed, steel spiked and ramped with temporary asphalt (cutback), and with traffic control signs and devices installed in accordance with the current edition of the State Department of Transportation "Manual of Uniform Traffic Control Devices".
H. The Contractor shall obtain compaction and install base and temporary paving promptly. Contactor shall provide vehicular access to all homes each evening. All streets shall be kept clean and free of dust, mud or debris by providing daily clean up as necessary.
I. In locations not under asphalt or pcc pavement, native material shall be used where proper compaction and a stable surface can be obtained. Stabilization methods or imported material shall be provided when and where directed by the Engineer.
J. No backfilling shall be done until the installation to be covered has been inspected and approved for covering. Compaction of backfill shall proceed immediately after backfilling.
K. The Contractor shall immediately notify the Engineer upon encountering underground water. Accumulated water shall be prevented from flowing down through the bedding material and later pumping out and softening of surfaces or subgrade causing pavement failure. Where water causes such problems, during either construction or the guaranty period, it shall be drained to the nearest point where flow can be acceptably relieved; using gravel encased perforated metal pipe.
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L. Sanitary sewer water shall not be allowed to flow into the storm drain system.
M. Final paving over excavated area shall be in accordance with City Standard Drawings.
N. All landscape restoration including the restoration of any landscaping, irrigation, hardscape, brick work or walls removed or damaged during the sewer work shall be replaced in-kind. Landscape plant replacement shall be “in-kind” replacement with relatively the same size and dimensions of the plant that was removed or damaged or as directed by the Engineer. Grass replacement shall be sod consisting of a seed mix (blue-rye, fescue, etc.) that closely resembles the grass removed by his operations.
3.02 TRENCH SAFETY PLAN
A. For trenches and excavations five feet (5') or more in depth, the Contractor shall submit to the Engineer a detailed plan, and any revisions thereto, showing design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazards of caving ground.
B. Such plan shall be submitted at least ten (10) working days before the Contractor intends to begin trenching or do excavation work.
C. If such plan varies from the shoring system standards established by the Construction Safety Orders of the Division of Industry Safety, the plan shall be prepared, sealed and signed by a Civil or Structural Engineer registered in California. Signed and sealed copies of calculations necessary to qualify the system shall also be submitted.
D. Nothing herein shall be deemed to allow the use of shoring, sloping, or protective system less effective than that required by the Construction Safety Orders of the Division of Industrial Safety.
3.03 LAWNS AND CULTIVATED AREAS
A. Where trench crosses lawns, the sod shall be removed by cutting, stored and kept moist and replaced to its initial condition. Where trench crosses cultivated areas, the topsoil shall be replaced and replanted or cultivated into the same condition as existed prior to excavation.
B. Due care shall be exercised to avoid injury to existing trees, shrubs and other plants that are not to be removed. All work shall conform to the City’s Technical Specifications.
3.04 WIDTH OF TRENCH
A. Except where otherwise specifically permitted, sides of trenches shall be vertical, shored as required, and shall be of uniform width from top to bottom. Trenches shall be of a width as shown on the detail sheets in the plans, except for small diameter laterals, which may be installed in narrow "Ditch-Witch" type of trench.
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B. Unless otherwise specified or shown, the minimum width of the trench measured at the top of the pipe shall be in accordance with City Standard.
3.05 PAVING REMOVAL
A. Asphalt concrete shall be cut with a suitable tool, preferably a sawcutter, before excavation. Cutting with a jackhammer or a suitable grader-mounted wheel will be allowed provided that a neat orderly result is accomplished. Breaking of concrete or asphalt with excavation equipment will not be permitted.
B. After trench backfill and compaction, existing paving shall be saw cut vertically, with a neat, square edge just prior to final paving to a point twelve inches (12") or wider than each side of the trench line. Edges of all asphalt concrete on streets and roadways shall be saw-cut at least six inches (6") deep or to the depth of the existing asphalt concrete pavement, whichever is lesser, with a concrete saw. Saw cuts shall be parallel or perpendicular to centerline of the trench.
C. Excess paving shall be disposed of and shall not be used as backfill material.
D. All silt, and water used in the saw cutting operation, shall be removed through the use of a vacuum machine and properly disposed of offsite. All catch basins downstream from the saw cutting operation shall be covered to prevent sediment from entering.
3.06 SHORING, SHEETING AND BRACING
A. The Contractor shall furnish and install all shoring, sheeting, and bracing required to support adjacent earth banks and structures for the protection and safety of all personnel working in the trench. All shoring, sheeting, and bracing shall conform to the requirements of the State Department of Industrial Relations (DIR), Division of Occupational Safety and Health (DOSH), or local agents having jurisdiction over such matters.
B. Remove shoring, sheeting, and bracing in a manner that will protect the workers and prevent caving of banks and damage to the pipe, excavation, backfill, or adjacent property.
3.07 WATER CONTROL
A. The Contractor shall be solely responsible for dewatering trenches and excavations, and subsequent control of ground water.
B. Contractor shall provide and maintain such pumps or other equipment as may be necessary to control ground water and seepage, to the satisfaction of the Engineer and in compliance with the requirements of the geotechnical report.
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C. All pumped water must be treated for sediment removal prior to discharge to City storm drains. Seepage coming from the sewer line shall be disposed of into the sanitary system.
3.08 BACKFILL AND COMPACTION
A. Initial backfill shall be carefully packed under the haunches of the pipe and brought up simultaneously on both sides, to obviate any displacement of the pipe from its true alignment. The initial backfill shall be compacted in layers no more than eight inches (8") in thickness, in a manner that will preclude moving the pipe, to not less than ninety percent (90%) of maximum dry density as determined by the procedure set forth in ASTM D 1557, "Test Methods For Moisture-Density Relations of Soils and Soil Aggregate Mixtures Using Ten Pound Rammer and Eighteen Inch Drop.” B. Water Jetting for compaction of backfill materials shall not be permitted.
C. Subsequent backfill shall be placed in loose lifts not exceeding twelve inches (12") in thickness before compaction, and compacted by the use of pneumatic tampers or other mechanical means approved by the geotechnical engineer.
D. Each layer shall be watered or dried, as required, to bring the soils as close as practical to the optimum moisture content for proper compaction. Compaction equipment or methods that produce horizontal or vertical earth pressures, which may cause excessive displacement or may damage the pipeline, will not be permitted. Lifts of backfill material shall be compacted to not less than ninety percent (90%) above the pipe but not less than ninety-five percent (95%) for a minimum depth of thirty inches (30") below subgrade as determined by the procedure set forth in ASTM D 1557. Subsequent backfill for trenches in unpaved, non-traffic areas shall be compacted to not less than eighty-five percent (85%) of maximum dry density.
3.09 BASE, PAVING, AND TESTING
A. The Contractor shall compact material as work progresses, and base and temporary paving shall be installed the same day as excavated. Contractor shall test pipe within five (5) working days of installation and shall install permanent paving within ten (10) working days of initial excavation.
3.10 TESTING
A. The Contractor shall make all tests when in their opinion, sufficient densities have been achieved. If the first tests in any area fail, the Contractor shall pay for any further testing in that area until specified densities are obtained. Engineer shall determine the number and location of tests required.
B. Contractor shall furnish a backhoe and operator upon request, at no cost to the City to assist in testing.
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3.11 TRAFFIC SIGNAL FACILITIES, DETECTOR LOOPS AND PAVEMENT MARKINGS A. Existing signal facilities, detector loops, and pavement markings shall be protected.
Any damage shall be replaced or restored at the Contractor's expense in accordance with the specifications and as approved by the Engineer.
END OF SECTION
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SECTION 321123 – AGGREGATE BASE COURSES
PART 1. GENERAL
1.1 SUMMARY
A. Section Includes:
1. Class 2 Aggregate Base course.
B. Related Sections:
1. Section 321216 – Paving Systems
2. Section 321313 - Concrete Improvements.
1.2 UNIT PRICE - MEASUREMENT AND PAYMENT
A. Aggregate Base used under concrete work such as curb and gutter, valley gutter, sidewalk, retaining curbs, etc. shall considered incidental to the item most closely related to and no separate compensation will be allowed therefor.
1.3 REFERENCES
A. American Association of State Highway and Transportation Officials:
1. AASHTO M288 - Standard Specification for Geotextile Specification for Highway Applications.
B. Caltrans Standard Specifications:
1. Section 26 Aggregate Base.
C. CalRecycle
1. http://www.calrecycle.ca.gov/ConDemo/Aggregate/
1.4 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
B. Samples: Submit, in air-tight containers, 5 lbs sample of each type of aggregate fill to testing laboratory or as required by the City.
C. Submit aggregate base gradation, R-value requirements, and sand equivalent requirements as specified in this section.
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D. Aggregate samples must not be treated with lime, cement, or chemicals before testing for durability index.
E. Aggregate from untreated reclaimed processed asphalt concrete, Portland cement concrete, lean concrete base or cement-treated base is not considered treated.
F. If the aggregate gradation test results, sand equivalent test results, or both do not comply with the Contract compliance requirements, remove the aggregate base or request a payment deduction. If the payment deduction request is authorized, $2.00/cu yd is deducted.
G. Materials Source: Submit name of aggregate materials suppliers.
H. Manufacturer's Certificate: Certify products meet or exceed specified requirements.
I. Supplier shall submit certification data that aggregate base meets the requirements per Caltrans Testing Methods.
1.5 SUSTAINABLE DESIGN SUBMITTALS
A. Manufacturer's Certificate: Certify products meet or exceed specified sustainable design requirements.
1. Materials Resources Certificates:
a. Certify source and origin for salvaged and reused products. b. Certify recycled material content for recycled content products. c. Certify source for regional materials and distance from jobsite.
1.6 QUALITY ASSURANCE
A. Furnish each aggregate material from single source throughout the Work.
B. Perform Work according to City Standards.
PART 2. PRODUCTS
2.1 SUSTAINABILITY CHARACTERISTICS
A. Materials and Resources Characteristics:
1. Recycled Content Materials: Furnish materials with maximum available recycled content.
2. Regional Materials: Furnish materials extracted, processed, and manufactured within 250 miles of jobsite.
2.2 AGGREGATE MATERIALS
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A. Aggregate must be clean and consist of any combination of the following:
1. Broken Stone
2. Crushed Gravel
3. Natural rough-surfaced gravel
4. Sand
5. Processed reclaimed asphalt concrete, Portland cement concrete, lean concrete base, or cement-treated base.
B. Quality: Aggregate base furnished for the base material shall be free from vegetable matter and other deleterious substances, and shall be of such nature that it can be compacted readily under watering and rolling to form a firm stable base.
C. Maximum aggregate size shall be 3/4-inch maximum aggregate gradation unless specified otherwise.
D. Class 2 Aggregate Base: ASTM D2940; graded type. Conform to Section 26 of the Caltrans Standard Specifications.
PART 3. EXECUTION
3.1 EXAMINATION
A. Verify compacted subgrade is moisture conditioned and ready to support paving and imposed loads.
1. Proof roll subgrade with minimum two perpendicular passes to identify soft spots.
2. Remove soft subgrade and replace with compacted fill unless specified otherwise in the Project Geotechnical Report or as ordered by the Project Manager.
B. Immediately before spreading aggregate base, the subgrade must comply with the specified compaction and elevation tolerance for the material involved and be free from loose or extraneous materials.
C. Contractor may use aggregate base to fill areas of the subgrade that are lower than the proposed grade.
3.2 PREPARATION
A. Correct irregularities in subgrade gradient and elevation by scarifying, moisture conditioning, reshaping, and re-compacting.
B. Do not place fill on soft, muddy, or frozen surfaces.
3.3 AGGREGATE PLACEMENT
A. Spread and shape the aggregate base to such thickness that after watering and compacting, the completed aggregate base is within the tolerances specified below in Section 3.5.
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B. Avoid material segregation. Segregated materials shall be re-mixed until uniform.
C. Aggregate base must be free from pockets of coarse or fine material.
D. If the aggregate base thickness shown is 0.50 foot or less, spread and compact the aggregate base in one layer. If the thickness shown is more than 0.50 foot, spread and compact the aggregate base in at least 2 approximately equal layers in thickness. The compacted thickness of any one later must not exceed 0.50 foot.
E. At locations inaccessible to spreading equipment, spread and compact aggregate base by any means that will attain the specified requirements; by hand compaction if needed.
F. Apply water to moisture condition the aggregate base as needed for optimum moisture content for compaction.
G. Compact each aggregate base layer to at least 95 percent relative compaction unless otherwise noted elsewhere.
H. Level and contour surfaces to elevations, profiles, and gradients indicated.
I. Maintain optimum moisture content of fill materials to attain specified compaction density.
J. Correct areas of aggregate base that do not comply with the described thickness.
3.4 TOLERANCES
A. Section 014516 - Quality Control: Tolerances.
B. Maximum Variation from Flat Surface: 1/4 inch measured with 10-foot straight edge.
C. Maximum Variation from Thickness: 1/4-inch.
D. Maximum Variation from Elevation: 1/4-inch.
END OF SECTION
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SECTION 321216 – ASPHALT PAVING AND MISCELLANEOUS PAVING ITEMS PART 1 GENERAL
1.1 DESCRIPTION
A. Work included: Work covered in this section consists of performing all operations necessary for producing and placing hot mix asphalt (HMA) by mixing aggregate and asphalt binder at a mixing plant and spreading and compacting the HMA mixture.
B. Hot mix asphalt overlay and deep lifts (at dig outs) shall be provided where shown on the plans and as marked in the field.
C. Section includes:
1. Quality Control Plan.
2. Quality Control Testing.
3. Acceptance Testing.
4. Asphalt Binder and Tack Coat.
5. Aggregate Materials.
6. Hot Mix Asphalt.
7. Utility Cover Adjustments
8. Vehicle Detectors.
D. Paving shall comply with the current State Standard Specifications and Standard Plans. HMA shall be provided in accordance with the Standard HMA construction process and conform to the latest Caltrans Section 39 of the Standard Specifications and as detailed in this specification.
1.2 RELATED SECTIONS
A. Section 321723 – Traffic Striping, Pavement Markers, Pavement Markings & Signage
1.3 REFERENCES
A. State Standard Specification:
1. Section 39 Asphalt Concrete.
2. Section 92 Asphalt Binder.
3. Section 94 Asphaltic Emulsions
4. Section 96 Geosynthetics
B. American Association of State Highway and Transportation Officials:
(AASHTO)
1. AASHTO M17 - Standard Specification for Mineral Filler for Bituminous Paving Mixtures.
2. AASHTO M29 - Standard Specification for Fine Aggregate for Bituminous Paving Mixtures.
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3. AASHTO M140 - Standard Specification for Emulsified Asphalt.
4. AASHTO M208 - Standard Specification for Cationic Emulsified Asphalt.
5. AASHTO M288 - Standard Specification for Geotextile Specification for Highway Applications.
6. AASHTO M320 - Standard Specification for Performance-Graded Asphalt Binder.
7. AASHTO M324 - Standard Specification for Joint and Crack Sealant s, Hot Applied, for Concrete and Asphalt Pavements.
8. AASHTO MP1a - Standard Specification for Performance-Graded Asphalt Binder.
9. AASHTO T283-14 – Standard Method of Test for Resistance of Compacted Asphalt Mixtures to Moisture-Induced Damage.
10. AASHTO T324 (Modified) -Hamburg Wheel-Track Testing of Compacted Hot Mix Asphalt (HMA).
C. Asphalt Institute:
1. AI MS-2 - Mix Design Methods for Asphalt Concrete and Other Hot- Mix Types.
2. AI MS-19 - Basic Asphalt Emulsion Manual.
3. AI SP-2 - Superpave Mix Design.
1.4 QUALITY CONTROL PLAN
A. Establish, implement and maintain a Quality Control Plan (QCP) to ensure materials and work comply with the specifications and the corrective actions required to control the quality of work. The QCP shall comply with these specifications and Section 39-2 “Standard” of the Caltrans Standard Specifications.
B. The Contractor shall submit a Quality Control (QC) plan for HMA.
C. The QC plan shall describe the organization and procedures for:
1. Controlling HMA quality characteristics
2. Taking samples, including sampling locations.
3. Establishing, implementing, and maintaining QC
4. Determining when corrective actions are needed.
5. Implementing corrective actions.
6. Using methods and materials for backfilling core locations.
D. The QC plan must address the elements affecting HMA Quality, including
1. Aggregates
2. Asphalt binder
3. Additives
4. Productions
5. Paving
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E. For CIP projects, the Contractor shall permit the City’s certified testing laboratory to take samples of the aggregate and asphalt emulsion used in the project at the City’s discretion. Gradation and sand equivalent tests may be run on the aggregate and residual asphalt tests on the emulsion. City will compare the test results with this Section and notify the Contractor if any test fails to meet specifications.
F. The Contractor shall furnish all tools and equi pment and employ sufficient trained personnel to operate all equipment and perform all handwork efficiently and skillfully.
1.5 SUBMITTALS
A. Section 013300 - Submittal Procedures: Requirements for submittals.
B. Job Mix Formula (JMF): Except for the Hot Mix Asphalt (HMA) to be used in miscellaneous areas (median island areas not including inside shoulders, island areas, sidewalk, gutters, ditches, over side drains and aprons at end of drainage structures) and dikes, submit the proposed JMF for Type A HMA.
C. The JMF must be submitted on the Contractor Job Mix Formula Proposal form along with:
1. Mix design documentation on Contractor’s Hot Mix Asphalt Design data form dated with 12 months of submittal.
2. Safety Data Sheets (SDS) for the following:
a. Asphalt Binder
b. Supplemental fine aggregate except fines from dust collectors c. Antistrip additives.
D. The Contractor’s Hot Mix Asphalt Design Data form must show documentation on aggregate quality.
E. Submit QC test results for Reclaimed Asphalt Pavement (RAP) gradation with the combined aggregate gradation within 2 business days of taking RAP samples during Type A HMA production.
F. Contractor shall submit a new JMF if there are changes to any of the following:
1. Target asphalt binder percentage greater than ±0.2 percent.
2. Asphalt binder supplier
3. Combined aggregate gradation
4. Aggregate sources
5. Liquid antistrip producer or dosage
6. Average binder content in a new processed RAP stockpile by more than ±2.0 percent from the average RAP binder content reported on Contractor Hot Mix Asphalt Design Data form.
7. Average maximum specific gravity in a new processed RAP stockpile by more than ±0.060 percent from the average maximum specific gravity value reported on Contractor’s Hot Mix Asphalt Design Data form.
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8. Any material in the JMF.
G. Submit a current asphalt concrete mix design from two separate sources (primary source and backup source) for asphalt concrete proposed to be used.
H. Contractor shall provide delivery tickets to the C ity at the time of delivery of each load of product, including asphalt concrete, tack c oat, sealant, and paving reinforcement mat. Each delivery ticket shall incl ude or be accompanied by appropriate batch information produced by the batching plant or factory of origin and information stating the mix or model number, to tal yield in tons, gallons, or square feet, and time, date, and location of delivery.
I. Any asphalt concrete rejected by the Project Manager shall be deducted from the total quantity of asphalt concrete tonnage.
J. Contractor shall submit a reference plan for utility facilities adjustment prior to lowering any utility facilities.
K. Contractor shall submit a paving plan for longitudinal joints.
1.6 ENGINEER’S ACCEPTANCE
A. In addition to the Quality Control Plan, the Contractor shall provide an independent quality control to perform independent sampling in accordance with Section 39-1.05 and Section 39-2.03 of the Standard Specifications. City will provide acceptance testing. Sampling shall be performed under California Test 125. Testing shall be performed as specified in this Section.
B. Start-up evaluation will be performed in accordance with Section 39-1.07 of the Standard Specifications. Sampling and testing shall occur at a minimum for the following:
1. Aggregate
2. Asphalt binder
3. RAP
4. HMA
C. Quality control sampling shall be performed by the Contractor’s Independent Assurance Tester in accordance with the following schedule: and quality acceptance testing shall be performed by the City
Quality Characteristic Test Method Minimum Sampling
and Testing
Frequency
Location
of
Sampling
Maximum
Reportin
g Time
Allowanc
eAggregate Gradation CT 202 1 per 750 tons Plant 24 hours Reclaimed Asphalt Pavement
Gradation
LP-9 Daily RAP System 24 hours
Asphalt Binder Content CT 379 or
CT 382
1 per 750 tons Loose Mix
Behind Paver
24 hours
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Percent of Maximum Theoretical
Density
CT 308 1 per 750 tons Loose Mix
Behind Paver
24 hours
Maximum Theoretical Density CT 309 Per CT 375 Loose Mix Behind Paver
24 hours
Aggregate moisture content at
continuous mixing plants and RAP
moisture content at continuous mixing
plants and batch mixing plants
CT 226 or
CT 370
2 per day during
production
Stock-piles or
Cold Feed
Belts
24 hours
Sand Equivalent (minimum) CT 217 1 per 750 tons Plant 24 hours HMA Moisture Content (maximum) CT 370 1 per 2,500 tons but not less than 1 per
paving day
Loose Mix
Behind Paver
24 hours
Stabilometer Value (minimum) No. 4
and
3/8” gradings 1/2” and 3/4”
gradings
CT 366
1 per 4,000 tons or 2
per five business
days, whichever is
greater
Loose Mix
Behind Paver
48 hours
Air Voids Content (%) CT 367
1 per 4,000 tons or 2
per five business
days, whichever is
greater
Loose Mix
Behind Paver
48 hours
Percent of crushed particles coarse
aggregate (% minimum) One
fractured face Two fractured faces
Fine aggregate (% minimum)
(Passing No. 4 sieve and retained on
No. 8 sieve)
CT 205 1 every 6,000 tons Plant 48 hours
Los Angeles Rattler (% maximum) Loss
at 100 revolutions Loss at 500
revolutions
CT 211 1 every 6,000 tons Plant 48 hours
Fine aggregate angularity (% minimum) AASHTO T-
304, Method A
1 every 6,000 tons Plant 48 hours
Quality Characteristic Test Method Minimum Sampling
and Testing
Frequency
Location
of
Sampling
Maximum
Reportin
g Time
Allowanc
eFlat and elongated particle (%
maximum at 5:1)
ASTM D 4791 1 every 6,000 tons Plant 48 hours
Voids in mineral aggregate (%
minimum)
LP-2 1 every 6,000 tons Loose Mix
Behind Paver
48 hours
Voids filled with asphalt (%) LP-3 1 every 6,000 tons None Calculation 48 hours Dust proportion LP-4 1 every 6,000 tons None Calculation 48 hours Moisture Sensitivity CT-371 1 every 5,000 tons Loose Mix Behind Paver
NA
D. A minimum of one sample for Rice Specific Gravity shall be taken by Independent Assurance Tester each day at the plant during placement of HMA.
The Rice Specific Gravity test shall be in accordance with ASTM D 2041. The results shall be submitted to the City within one working day of receiving them from the testing laboratory. Any change shall be noted and the Contractor shall take necessary measures to correct JMF or resubmit a new JMF for approval prior to continuing work.
E. In place density tests per CT 375 Nuclear Gage field test shall be performed during HMA operations by Independent Assurance Tester to meet compaction requirements per Standard Specifications. The frequency of testing shall be in accordance with CT 375.
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F. Should any test specified in Paragraph 1.04 of this Section fail to meet density requirements, Independent Assurance Tester shall take density core samples every 500 feet of paved roadway per Section 39-2.03 of Standard Specifications to verify density results.
G. Tests results outside the specifications shall be subject to reduced payment in accordance with the table of “Reduced Payment Factors for Percent of Maximum Theoretical Density” in Section 39-2.03.
1.7 PRODUCT HANDLING
A. All products described herein shall be handled in conformance to the applicable provisions of the Caltrans Standard Specifications.
1.8 PROJECT CONDITIONS
A. Weather Limitations:
1. No HMA shall be placed when weather conditions prevent the proper handling, finishing, or compaction of the mixtures.
2. Do not apply when underlying surface is muddy, frozen or wet.
3. Do not place tack coat when temperature is below 45º F.
4. Do not place hot mix asphalt when air temperature is below 45º F and surface temperature is below 50º F.
PART 2 PRODUCTS
2.1 TACK COAT
A. Tack Coat, Type SS-1H, conforming to the provisions of Sections 39 and 94 of the Caltrans Standard Specifications shall be used for digouts (pavement repairs) and over asphalt concrete planed surfaces.
2.2 ASPHALT BINDER
A. Asphalt binder for the Hot mix asphalt (HMA) shall be Grade PG 64-10, conforming to the provisions of Sections 92 of the Caltrans Standard Specifications.
B. Asphalt dikes, asphalt ditches and miscellaneous areas the grade of the asphalt binder for the Hot mix asphalt (HMA) shall be PG 70-10.
2.3 AGGREGATE
A. Aggregate shall be clean and free from deleterious substances and shall meet the gradation and quality for 1/2-inch and 3/8-inch HMA Type A in the Caltrans Standard Specifications.
B. Reclaimed Asphalt Pavement (RAP) aggregate may be substituted for a part of
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virgin aggregate in a quantity not to exceed fifteen percent (15%) by weight of the aggregate blend.
1. RAP shall conform to Section 39-2.02A (4) (b) (iii) – Reclaimed Asphalt Pavement of the State Standard Specifications.
2. During Type A HMA production, sample RAP twice daily and perform QC testing for:
a. Aggregate gradation at least once a day under California Test 384. b. Moisture content at least twice a day.
2.4 HOT MIX ASPHALT
A. Hot Mix Asphalt shall be HMA Type A and conform to the latest provisions of Section 39 of the Caltrans Standard Specifications.
B. Asphalt Concrete for the surface course shall be ½” Type A, in accordance with Section 39 of State Standard Specifications as modified in these Technical Provisions and the Special Conditions.
C. HMA batch plant shall be Department-qualified under the Department’s Materials Plant Quality Program of the Caltrans Standard Specifications.
PART 3 EXECUTION
3.1 GENERAL
A. Hot mix asphalt shall be proportioned, mixed, placed, spread and compacted in layers in conformance with the Standard HMA Construction Process described in Section 39 of the Caltrans Standard Specifications.
3.2 PROTECTION OF EXISTING STREET SURFACE
A. During the entire construction period, the Contractor shall take care to protect existing pavement and concrete surfaces. Surfaces scarred by cleanup or equipment shall be repaired in a manner satisfactory to the Engineer. Any and all damage caused by the Contractor's operations to existing roads and streets shall be repaired by the Contractor to at least the original condition and to the satisfaction of the Engineer, at no additional cost to the City.
B. If pavement is damaged (excessive loading, grouser marking, scarring/scraping of pavement, etc.) outside the limits of the work, a full lane width grinding and overlay will be required as directed by the Engineer at no additional compensation to the Contractor.
3.3 TACK COAT
A. Ensure the digout area is clean and dry. All material accumulations which would interfere with the adhesion of the tack coat or with the placing and performance
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of the hot mix asphalt shall be removed, including dust, loose aggregate, soil, leaves, and pieces or lumps of other foreign material deposited on the surface.
B. A tack coat shall be applied to existing pavement including planed surfaces, between HMA layers, and to vertical surfaces of curbs, gutters and construction joints at the minimum residual rates specified in Section 39-1.09C “Tack Coat” of the Caltrans Standard Specifications.
C. Before placing hot mix asphalt, a tack coat shall be furnished and applied uniformly to contact surfaces of all cold pavement joints, curbs, gutters, and all existing pavement to be surfaced in conformance with Section 39 of the Caltrans Standard Specifications.
D. Asphalt binder tack coat shall be placed under reinforcing mat to the application rates in compliance with the manufacturer’s recommendations.
E. Asphaltic emulsion tack coat shall be placed over planed surfaces to the application rates in the Caltrans Standard Specifications.
F. Tack coat shall be applied to any course in advance of spreading the next course unless the surface temperature is at least 140 °F.
G. Hot mix asphalt shall not be placed until tack coat has cured. Immediately in advance of placing HMA, apply additional tack coat to damaged areas or where loose or extraneous material is removed.
H. Close areas receiving tack coat to traffic. Do not track tack coat onto pavement surfaces beyond the job site.
3.4 TRANSPORTING HOT MIX ASPHALT
A. From mixing site in trucks having tight, clean compartments.
B. Coat hauling compartments with lime-water mixture to prevent sticking.
C. Elevate and drain compartment of excess solution before loading mix.
D. Provide covers over asphalt concrete mixture to protect from weather and to prevent loss of heat.
E. During periods of cold weather or for long distance deliveries, pre-insulation around entire truck bed surfaces.
F. Do not use petroleum products such as kerosene or diesel fuel to release HMA from trucks, spreaders, or compactors.
3.5 HOT MIX ASPHALT
A. HMA surfacing shall conform to the provisions of Section 39 of the Standard Specifications. Placing HMA shall be done under suitable weather conditions for
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such operations. Rain, snow or other inclement weather will be cause for discontinuing paving Work. The Engineer shall have the authority for determining whether weather conditions are sufficient cause to postpone work.
3.6 SPREADING AND COMPACTING
A. Spreading and compacting shall be performed in accordance with Section 39-
1.10 and Section 39-1.11 of the Standard Specifications.
B. HMA shall be transferred from the trucks into the hopper of the paving machine by means of a shoulder machine equipped with a conveyor belt. Any equipment used to transfer asphalt concrete to the paving machine shall not exceed the load capacity of any surface it is driven over and, therefore, shall not produce rutting or pumping of the existing roadway surface or newly placed HMA at any time. No trucks or other rubber-tired construction equipment are allowed on the subgrade at any time except when proof rolling in the presence of the Engineer.
No trucks or other rubber-tired construction equipment are allowed on newly placed HMA until the day after the HMA is placed.
C. Longitudinal joints in the top layer must match specified lane edges shown on the striping plans. Longitudinal joints in lower HMA layers shall be offset at least
0.5 feet from each side of the specified lane edges.
D. Finish rolling shall be completed before pavement surface temperature is below 150 degrees F.
E. Traffic shall not be allowed on HMA until mid-depth temperature is below 160 degrees F and the pavement surface temperature is below 140 degrees F.
END OF SECTION
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SECTION 321313 – CONCRETE IMPROVEMENTS
PART 1 GENERAL
1.1 SUBMITTALS
A. The Contractor shall furnish a concrete mix design to the Engineer at least ten (10) working days prior to the start of the work.
PART 2 MATERIALS
2.1 CONCRETE
A. Concrete used in curbs and sidewalks shall comply with Section 73 of the State Standard Specifications
2.2 REINFORCEMENT
A. Reinforcement for concrete structures shall conform to Sections 52-1.01 through 52-1.04 inclusive of the Caltrans Standard Specifications except that Butt Welded Splices shall not be permitted.
2.3 DETECTABLE WARNING SURFACE
A. Curb ramp detectable warning surface shall include of raised truncated domes constructed or installed on curb ramps in conformance with the details shown on the plans and these special provisions. Detectable Warning Surface (DWS) shall be red clay (Federal color 22144) in color and a set-in-concrete style of truncated domes. The detectable warning surface shall be prefabricated, cast- in-place. No surface-applied matting systems (i.e. glued and screwed) style of DWS shall be allowed. Contractor shall neatly trim prefabricated dome panels to fit and conform to curb radius.
B. Prefabricated detectable warning surface shall be in conformance with the requirements established by the Department of General Services, Division of State Architect and be installed in conformance with the manufacturer's recommendations.
C. The finished surfaces of the detectable warning surface shall be free from blemishes.
D. Detectable Warning tiles shall incorporate an in‐line pattern of truncated domes measuring nominal 0.2” height, 0.90” base diameter, and 0.45” top diameter, spaced center‐to‐center 2.35” as measured side by side. For wheelchair safety the field area shall consist of a high density, pyramid micro texture of raised points 0.05” high.
E. Compressive Strength of the tiles shall be no less than 25,000 PSI when tested by ASTM D695.
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F. Tensile Strength of the tiles shall be no less than 12,500 psi when measured by ASTM D 638
G. Flexural Strength of the tiles shall be no less than 25,000 psi when tested by ASTM D 790.
H. Slip resistance of the Tile when tested by ASTM C 1028-96: The combined wet and dry static coefficients shell be no less than 0.80 on top of domes and field area.
I. The manufacturer shall provide a written 5-year warranty for prefabricated detectable warning surfaces, guaranteeing replacement when there is defect in the dome shape, color fastness, sound-on-cane acoustic quality, resilience, or attachment. The warranty period shall begin upon acceptance of the contract.
2.4 HOT MIX ASPHALT CONFORM
A. The hot mix asphalt conform material adjacent to concrete improvements shall comply with the Section 321216 Paving Systems in these specifications.
PART 3 EXECUTION
3.1 REMOVAL OF EXISTING CONCRETE
A. Existing sidewalk, curb, gutter and base material shall be removal as necessary to construct the required improvements. Existing concrete shall be sawcut along existing score lines to full depth prior to removal. Existing concrete to be removed varies in thickness, no additional compensation shall be given for varying concrete thickness. Any concrete broken due to the Contractor's failure to comply with these requirements shall be removed and replaced at the Contractor's expense. Asphalt concrete shall be saw cut at least 12 inches from the lip of gutter in a neat straight line to accommodate form boards.
B. The Contractor shall furnish and install a 6”-thick deep-lift asphalt concrete (Patch Pave) adjacent to concrete curb and gutter, valley gutter. The cost to install the 6”-thick deep-lift asphalt concrete (Patch Pave) shall be considered in the prices paid for under “AC Conform @ Curb Ramp”, and no additional compensation will be allowed therefor.
3.2 SUBGRADE AND BASE PREPARATION
A. Subgrade shall be compacted to 90% relative compaction prior to placing base material. Base material shall be placed to the depths required by the plans and details and compacted to 95% relative compaction after mixing the material with water to achieve the optimum moisture content.
3.3 FORMS
A. Wooden forming shall be of two-inch nominal thickness staked at two-foot
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intervals. The maximum gap at the bottom of the forms shall be 1-3/4 inches.
Forms shall not be installed until after base material has been placed and compacted.
3.4 PROTECTION OF EXISTING FACILITIES
A. The contractor shall protect existing facilities from damage, and discoloration from concrete splash. Adjacent concrete facilities shall be covered during concrete placement to prevent concrete splash and excess concrete from staining the adjacent concrete. After initial placement, strikeoff and finishing, the protection shall be removed and the adjacent concrete cleaned.
B. Vertical existing facilities such as light poles, walls, etc. shall be protected with plastic extending a minimum of three feet above the concrete surface. After initial placement, strikeoff and finishing, the protection shall be removed and the vertical surfaces cleaned.
C. Existing curb outlet drain pipes (under sidewalk drains) shall be protected, rerouted, or replaced and incorporated into the new curb & gutter and curb ramps as applicable. The cost to protect, reroute or replace the curb outlet drain pipes shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
3.5 PLACING AND FINISHING CONCRETE
A. No concrete shall be placed until the forms have been approved.
B. Concrete shall be deposited on a moist grade in such a manner as to require as little re- handling as possible. In general, adding water to the surface of the concrete to assist in finishing operations shall not be permitted.
C. Control joints and expansion joints shall be installed at locations noted on the plans, to match existing, as approved on the score line and expansion joint submittal or as directed by the Engineer. If expansion joint material is used, a minimum of two, 1/2 inch by eighteen-inch dowels shall be used with additional dowels placed every twenty-four inches. Control joints in sidewalks may be made using a tooled joint which shall extend a minimum of 1/4 of the depth of the concrete and shall not be less than 1-1/2 inches in depth.
D. Unless otherwise directed by the Engineer, a medium broom finish shall be applied to match existing facilities in texture and appearance. An approved white or clear liquid curing compound shall be applied to the newly paced concrete after finishing operations have been completed. Full compensation for applying curing compound to all exposed faces of the concrete surface shall be considered as included in the prices paid for the various contract items of work involved and no additional compensation will be allowed therefor.
E. All new concrete sidewalk and curb & gutter shall be doweled and epoxied into the existing concrete sidewalk and curb & gutter using #4 rebar at 20” O.C.
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(minimum of 2). A minimum of 6” Class 2 aggregate base shall be placed and compacted in conformance with these Technical Provisions. Full compensation for furnishing and installing dowels, epoxy and Class 2 aggregate required for the concrete construction shall be considered as included in the prices paid for the various contract items of work involved and no additional compensation will be allowed therefor.
F. The Contractor shall round-off all grade breaks on the curb & gutter with an algebraic difference of 3% and greater. The minimum round-off distance shall be 5 feet.
G. Full compensation to procure, deliver, place, spread, and compact imported topsoil material shall be considered as included in the contract prices for the various contract items of work involved, and no additional compensation shall be allowed thereof.
3.6 CONCRETE PROTECTION
A. The Contractor shall protect the concrete against traffic and vandalism. If the concrete is damaged or vandalized, the Contractor shall make the necessary repairs at its own expense. The repair procedure for damaged or vandalized concrete shall be approved in advance by the Engineer.
3.7 CONCRETE CURB RAMPS
A. The Concrete curb ramps shall be constructed in conformance with Standard Plans A88A and A88B of the State Standard Plans unless otherwise shown in plans.
B. All existing utility boxes, valve covers, street light base, sign posts and clean outs located in the sidewalk and curb ramps shall be adjusted to grade and shall be included in the price paid for the various contract items of work unless otherwise noted involved and no additional compensation will be allowed therefor.
C. All existing traffic signal pole bases in the sidewalk and curb ramps identified in plans to be tied in to new grade with concrete work or repair shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
D. All landscape restoration including the restoration of any landscaping, irrigation, hardscape, brick work or walls shall be included in the price paid for the various contract items of work involved and no additional compensation will be allowed therefor.
E. Topsoil shall be used as backfill behind the new sidewalk and curb ramps to fill the gap left from the form board and other work. Top soil shall be procured and imported from a local supplier.
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3.8 DETECTABLE WARNING SURFACE (DWS)
A. All curb ramps shall have a detectable warning surface (DWS) installed in conformance with City Standards and the latest Caltrans Standard Details A88A and A88B. The color of the DWS shall be brick red or clay red.
3.9 HOT MIX ASPHALT CONFORM AT ACCESS RAMP
A. Grinding and placement of HMA for the conform area in front of the concrete access ramps shall comply with the Section 321216 of these specifications.
3.10 CARE AND REPAIR OF CONCRETE
A. Repair shall be per ACI 301 with the following requirements:
a. Patching mortar shall be Sikatop 123 Plus or approved equal. b. Use Sikadur 32 HiMod bonding agent or approved equal. c. Honey and defects deeper than 1.5 inches shall require approval by Engineer prior to commencing repair work.
d. Cracks wider than 0.02 inches for hydraulic structures shall be repaired prior to leak testing.
e. Cracks wider than 0.04 inches shall be repaired.
END OF SECTION
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SECTION 321723 – TRAFFIC STRIPING, PAVEMENT MARKERS, PAVEMENT MARKINGS
AND SIGNAGE
PART 1 GENERAL
1.1 SCOPE OF WORK
A. This work consists of removal and replacement of traffic stripes, legends, and raised pavement markers on various roadway sections to their original configuration or as shown on the plans or directed by the engineer in the field.
Any roads, driveways, walls, and curbs which are damaged during construction, shall be repaired to their original or better condition.
B. Any existing traffic signs that are removed, shall be salvaged to the City Public Works Yard.
C. Traffic signs, stripes, legends, and raised pavement markers shall conform to the latest edition of the California Manual on Uniform Traffic Control Devices, California Department of Transportation, Traffic Manual, Maintenance Manual, and Caltrans Standard Specifications as modified by these Special Provisions.
D. The work includes striping, markings, markers, and signage on the roadway sections as shown on the project plans, located in San Carlos, California.
E. Where traffic conditions are to remain, roadways shall be striped and marked to match existing except as noted in the plans.
1.2 REFERENCES
A. California Department of Transportation (Caltrans):
1. Maintenance Manual.
2. Current Standard Specifications
a. Section 81 – Miscellaneous Traffic Control Devices
b. Section 84 – Markings
c. Section 95 – Epoxy
3. California Manual on Uniform Traffic Control Devices
1.3 SUBMITTALS
A. The Contractor shall submit a schedule for the performance of this work. The schedule shall include approximate dates of work on each roadway section.
B. The Contractor shall submit a detailed traffic control plan for the performance of this work.
C. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
D. Product Data: Provide manufacturers specification and literature for materials
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furnished.
1.4 PROJECT CONDITIONS
A. Do not apply pavement marking paint within 8 hours of fog or rain or when below 40 Degrees F or when pavement is wet.
B. Contractor shall guarantee that all traffic lane pavement markers be in place and adhered to the pavement for a period of not less than 90 days from the date of acceptance of the work by the Owner.
C. All new traffic striping and pavement markings shall be thermoplastic, unless otherwise shown on the plans.
D. No pavement markings shall be applied to any roadway surface until new hot mix asphalt surface has cured for a minimum of seven (7) days when hot melt bituminous adhesive is used, and not less than 14 days when epoxy adhesive is used.
PART 2 PRODUCTS
2.1 GENERAL
A. Unless otherwise specified in the Special Provisions or contract plans, all pavement striping and markings (except temporary) shall be thermoplastic.
2.2 THERMOPLASTIC MATERIAL
A. Thermoplastic material and glass beads shall conform to the requirements of Caltrans Standard Specifications Section 84-2.
B. Thermoplastic material shall be free of lead and chromium, and shall conform to the requirements in State Specification PTH-02ALKYD.
C. Retroreflectivity of the thermoplastic traffic stripes and pavement markings shall conform to the requirements in ASTM Designation: D 6359-99. White thermoplastic traffic stripes and pavement markings shall have a minimum initial retroreflectivity of 250 mcd m -2 lx-1. Yellow thermoplastic traffic stripes and pavement markings shall have a minimum initial retroreflectivity of 150 mcd m -2 lx-1.
D. Thermoplastic material shall be white, unless otherwise shown on the plans.
2.3 GLASS BEADS
A. Glass beads to be applied to surface of the paint and thermoplastic shall conform to the requirements of State Specification 8010-11E-22 (Type II).
2.4 PAVEMENT MARKERS AND ADHESIVES
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A. Pavement markers shall conform to Section 81-3, "Pavement Markers," of the Caltrans Standard Specifications, as specified herein, and in the Special Provisions.
B. Fire Hydrant markers shall be two-way, reflective blue markers.
C. Adhesive for pavement markers shall be Rapid Set Type epoxy conforming to Section 95-2.04 of the Caltrans Standard Specifications or hot melt bituminous adhesive conforming to Section 81-3 of the Caltrans Standard Specifications.
2.5 TEMPORARY PAVEMENT DELINEATION
A. Temporary Pavement Delineation shall conform to Section 12-6, "Temporary Pavement Delineation," and Section 84-2, "Traffic Stripes and Pavement Markings", of the Caltrans Standard Specifications.
PART 3 EXECUTION
3.1 LAYOUT
A. The Contractor shall furnish the necessary control points for all striping, painting and markings and shall be responsible for the completeness and accuracy thereof to the satisfaction of the Engineer.
B. The Contractor shall perform all layout, alignment, and spotting for traffic stripes and markings. Traffic striping shall match the striping prior to the treatment except as shown on the plans or directed by the engineer. When indicated on the plans, striping and marking shall not vary by more than 2 inches in 50 feet from the alignment shown on the plans. Where markings will match existing markings, striping and marking shall not vary by more than 2 inches in 50 feet from the existing markings. The dimensional details of the stripes and markings shall conform to the provisions set forth in the Traffic Manual and Maintenance Manual available for Caltrans.
C. Cat tracks shall consist of spots of paint not more than 3 inches in width and not more than 5 feet apart along the alignment of the stripe. Paint for the cat tracks shall be the same as that for the intended stripe. Paint for the dribble lines shall be neutral color obtained by mixing approximately two parts white paint with one-part black paint.
D. Existing stripes and markings shall be removed prior to painting new ones, but in no case shall any section of street be left without the proper striping for more than 24 hours, or over weekends or holidays.
E. NO STRIPING SHALL BE PAINTED UNTIL THE LAYOUT AND SPOTTING HAVE BEEN SPECIFICALLY APPROVED BY THE ENGINEER. Allow 3 working days for approval.
3.2 TRAFFIC PAINT AND GLASS BEADS
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A. Traffic markings shall be placed in conformance with the provisions in Section 84, "Pavement Markings," of the Standard Specifications, per Volume 1, Section 2-A through 2-D, and 2-G of the City Traffic Design Standards, and these special provisions.
B. All lines stop bars and crosswalks to be painted on street surfaces shall be thermoplastic material Pavement markings of test symbols and arrows shall be formed per Caltrans Standards and shall be thermoplastic material.
C. Thermoplastic traffic stripes (traffic lines) and pavement markings shall be applied in conformance with the provisions in Section 84, "Markings" of the Caltrans Standard Specifications and these special provisions.
D. Thermoplastic material for traffic stripes shall be applied at a minimum rate of
0.20-lb/ft. The minimum application rate is based on a solid stripe of 4 inches in width.
E. All new surfaces shall have the traffic paint applied in two applications in accordance with Section 84-3 of the Caltrans Standard Specifications. The first or priming coat shall be in light applications without glass beads to seal the pavement. The first coat shall be dry before application of the second coat.
F. All striping and marking shall be laid out by the Contractor and field reviewed by the City prior to final placement of the Thermoplastic material. Failure to obtain this field review shall be basis for rejection of the work by the City. Any work rejected shall be completely removed, the surface of the pavement restored to the satisfaction of the City, and new striping and marking placed at the Contractor’s expense.
G. Restriping except where indicated on the drawings, shall coincide with the original painting and shall be applied in one application in accordance with Section 84-3 of the Caltrans Standard Specifications.
H. Striping for 24" bars, 12" stop bars, and crosswalk lines shall coincide with the original painting except where indicated otherwise on the plans and shall be installed using Thermoplastic material. Stop bars shall be installed behind the pedestrian path of travel.
I. The pavement markings of the legend (text) and symbols (arrows) shall be furnished and installed, and shall coincide with the original painting except where indicated otherwise on the plans and shall be installed using Thermoplastic material.
J. Where striping joins existing striping, as shown on the plans, the Contractor shall begin and end the transition from the existing striping pattern or from the new striping pattern a sufficient distance to ensure continuity of the striping pattern.
K. All surfaces to be painted shall be clean and dry prior to painting. Ample time
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shall be allowed between placement of the asphalt pavement and the initial painting application. There shall be a minimum drying time between paint applications of approximately 20 minutes.
L. Glass beads shall be placed on all traffic stripes (except black stripes) and pavement markings except for the first or priming coat on new asphalt surfaces.
All glass beads shall be applied directly to the wet traffic paint with a method that provides uniform distribution.
M. Striping shall not be applied at temperatures below 50° F or if pavement surfaces are wet.
N. Thermoplastic traffic stripes and pavement markings shall be free of runs, bubbles, craters, drag marks, stretch marks, and debris.
O. All painted pavement markings shall be clean and sharp as to dimensions.
Ragged ends of segment or fogginess along the sides shall not be permitted.
P. The alignment of all striping shall be accurately laid out. Lines which have a wavy appearance shall be removed and replaced by the Contractor at its expense.
3.3 THERMOPLASTIC MATERIAL AND GLASS BEADS
A. Thermoplastic material and glass beads shall be applied in accordance with Caltrans Standard Specifications Section 84-2.04. Minimum application thickness shall be 0.1- inch for traffic stripes and 0.15-inch for pavement markings.
3.4 REMOVAL OF STRIPING, MARKERS AND MARKINGS
A. All stripes and pavement markings not in conformance with the proposed striping plan shall be removed by grinding or sandblasting. Black paint will not be allowed unless specifically indicated on the drawings. All thermoplastic material and raised pavement markers shall be removed prior to slurry seal operations.
B. All striping to be removed as shown on the Plans shall be covered under various contract items of work, and no additional compensation will be allowed therefor.
3.5 PAVEMENT MARKERS
A. Pavement markers shall be placed in conformance with the provisions in Section 85, "Pavement Markers," of the Standard Specifications, per Volume 1, Section 2-E of the City Traffic Design Standards, and these special provisions.
B. All surfaces shall be clean and dry prior to application of the markers.
C. Installation of pavement markers shall conform to the requirements of Section 85-1.06 of the Caltrans Standard Specifications.
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D. Blue reflective pavement markers shall be furnished and installed at the street centerline to mark the location of each existing fire hydrant.
E. The adhesive material used in the installation of pavement markers will cause severe dermatitis if it is allowed to come in contact with the skin or eyes. Use gloves and protective creams on the hands. Should this material contact skin, wash thoroughly with soap and water. Do not attempt to remove this material from the skin with solvents. If any adhesive material gets into the eyes, flush for 10 minutes with water and secure immediate medical attention.
3.6 TEMPORARY MARKING
A. Temporary Pavement markings shall be placed in conformance with the provisions in Section 84, "Pavement Markings," of the Standard Specifications, per the City Design Guidelines, and these special provisions.
B. Temporary pavement delineation shall be furnished, placed, maintained, and removed in conformance with the provisions in Section 12-3.01, "General," of the State Standard Specifications and these special provisions. Nothing in these special provisions shall be construed as reducing the minimum standards specified in the California MUTCD or as relieving the Contractor from the responsibilities specified in Section 7-1.09, "Public Safety," of the State Standard Specifications.
C. Whenever the work causes obliteration of pavement delineation, temporary or permanent pavement delineation shall be in place prior to opening the traveled way to public traffic. Lane line or centerline pavement delineation shall be provided at all times for traveled ways open to public traffic.
D. All work necessary, including any required lines or marks, to establish the alignment of temporary pavement delineation shall be performed by the Contractor. Surfaces to receive temporary pavement delineation shall be dry and free of dirt and loose material. Temporary pavement delineation shall not be applied over existing pavement delineation or other temporary pavement delineation. Temporary pavement delineation shall be maintained until superseded or replaced with a new pattern of temporary pavement delineation or permanent pavement delineation.
E. Temporary pavement markers and removable traffic type tape which conflicts with a new traffic pattern or which is applied to the final layer of surfacing or existing pavement to remain in place shall be removed when no longer required for the direction of public traffic, as determined by the Engineer.
F. Whenever lane lines and centerlines are obliterated, the minimum lane line and centerline delineation to be provided shall be temporary reflective raised pavement markers placed at longitudinal intervals of not more than 15 feet. The temporary reflective raised pavement markers shall be the same color as the lane line or centerline the markers replace.
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G. Temporary reflective raised pavement markers shall be placed in accordance with the manufacturer's instructions and shall be cemented to the surfacing with the adhesive recommended by the manufacturer, except epoxy adhesive shall not be used to place pavement markers in areas where removal of the markers will be required.
H. Temporary lane line or centerline delineation consisting entirely of temporary reflective raised pavement markers placed on longitudinal intervals of not more than 24 feet shall be used on lanes opened to public traffic for a maximum of 14 days. Prior to the end of the 14 days the permanent pavement delineation shall be placed. If the permanent pavement delineation is not placed within the 14 days, the Contractor shall provide, at his expense, additional temporary pavement delineation. The additional temporary pavement delineation to be provided shall be equivalent to the pattern specified for the permanent pavement delineation for the area, as determined by the Engineer.
3.7 SIGNAGE
A. Signage installation shall conform to Section 56 of the Caltrans Standard Specifications. In addition, Contractor shall reference City signage standards for post, foundation, and sign. Signs to be relocated as shown on the plans shall be covered under various contract items of work and no additional compensation will be allowed therefor.
END OF SECTION
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SECTION 332250 – SHORING AND TRENCH SAFETY
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Shoring required for general safety, worker protection, and protection of adjacent property and pipelines from the hazards of caving ground.
B. Shoring for trench excavations.
C. Shoring for structural excavations.
D. Shoring for tunneling pits.
E. Contractor's responsibilities.
F. Contractor's trench safety plan.
G. Contractor's supervisor.
1.2 RELATED SECTIONS
A. Section 020010 – Site Conditions
B. Section 020030 – Existing Utilities and Underground Structures C. Section 021100 – Site Preparation
D. Section 332315 – Excavation and Backfill
1.3 CONTRACTOR'S RESPONSIBILITIES FOR SAFETY
A. The Contractor shall be solely and completely responsible for conditions of the job site, including safety of all persons (including employees) and property during performance of the work. This requirement shall apply continuously and not be limited to normal working hours.
B. Minimum Requirements for Project Shoring Systems:
1. Comply with all governing regulations pertaining to excavation safety including the most current edition of Cal/OSHA Construction Safety Order, Article 6;
2. Be compatible with the surface and subsurface soil and groundwater conditions mapped and encountered in test borings for the project and resist lateral earth pressures and hydrostatic pressures (where not dewatered);
3. Protect personnel that enter the excavation;
4. Protect existing utilities, pavements, and structures;
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5. Excavation and 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. Provide stable excavation walls and bottom (e.g., prevent bottom heave);
7. Be designed to operate in conjunction with dewatering and soil stabilization systems also provided by the Contractor.
8. As permitted by the specifications, allow for removal or abandonment of shoring in a manner and sequence that is instep with the backfilling sequence (i.e., shoring shall not be removed ahead of backfilling) and does not damage the finished pipeline or structures or existing structures, pavements, and utilities including through settlement, heave or vibrations (Contractor to address removal/abandonment concerns specific to the type of shoring proposed in the shoring submittal). Any void space created by shoring removal shall be completely filled with a material approved by the City Engineer;
9. Resist lateral live loads from vehicular and/or train traffic, construction equipment and spoils, if any;
C. Safety provisions shall conform to U.S. Department of Labor (OSHA), the California Occupational Safety and Health Act, and all other applicable Federal, State, county, and local laws, ordinances, codes, the requirements set forth below, and any regulations that may be detailed in other parts of these Specifications.
D. Contractor is advised that Part 1926 of 29 CFR, subpart P, has been revised. This regulation governs excavations, trenching and protective systems, sloping, benching, wood, and aluminum shoring for various types of soils, and depths of excavations. The Contractor shall follow these regulations (including the latest revisions) for this project.
F. Where any of these requirements are in conflict, the more stringent requirement shall be followed.
G. The Contractor shall cease work immediately and notify the Engineer if they determine their shoring method is unsafe.
1.4 PERMIT
A. For trenches or excavations of depth five feet or deeper, the Contractor shall obtain from the State Division of Industrial Safety a permit for such excavation; submit a copy of the permit to the Engineer, prior to initiating any work requiring said permit.
1.5 CONTRACTOR SUBMITTALS
A. The Contractor’s 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 5 feet deep or over, shall submit to the Engineer for review for compliance with Section 6705 the Contractor’s
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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. If such plan varies from the shoring system standards established in the Construction Safety Orders of the State of California, such alternative system plans shall be prepared, stamped and signed by a civil or structural engineer licensed in the State of California at the Contractor’s expense.
B. A professional Civil or Structural Engineer licensed in the State of California shall design, sign, and stamp the Contractor’s proposed shoring systems for review by the Engineer prior to construction. Submit shoring system submittal in conjunction with dewatering plan and soil stabilization plan.
C. The shoring system submittal shall address open cut trenching, each storm drain catch basin, manholes, and for all excavations located in close proximity to unlined drainage channels or in close proximity to critical structures, utilities, or granular non-cohesive materials. Individual submittals are required for all open-cut trenching and for each major underground structure (sewer tie-in locations) as well as existing critical utilities including those in close proximity to drainage channels or those that penetrate a 1.5H:1V plane projected down from the utility.
D. The use of speed shores or trench box shoring in flowing, running or raveling ground conditions shall not be allowed. The Contractor shall be aware that flowing, running or raveling ground conditions are anticipated throughout the project and shall design their shoring system accordingly.
F. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
G. For all materials that are not pre-approved by the City the Contractor shall designate the source and/or submit samples of all materials in advance of their use for required testing and Engineer’s approval. All testing costs shall be at the Contractor’s expense.
H. Contractor shall design shoring system to protect nearby utilities that may not daylight into trench excavation but limits of existing backfill in close proximity can become unstable due to the effects of ground disturbance and reduced strength caused by past nearby excavations and backfill. Past trench backfill has consisted of granular non-cohesive materials (including pea- gravel) and have little to no stand-up time. Full face, continuous excavation wall support shall be required in these areas.
1.6 SAFETY ORDERS
A. The Contractor shall have at the work site, copies or suitable extracts of the Construction Safety Orders of Cal-OSHA, and Part 1926 of 29 CFR, subpart P.
B. All work shall comply with the provisions of these and all other applicable laws, ordinances and regulations.
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C. The Contractor is prohibited in the use of unrestricted speed shores or trench box shoring in flowing, running, or raveling ground conditions.
1.7 CONTRACTOR'S SUPERVISOR
A. The Contractor shall appoint a qualified and competent supervisory employee who shall be responsible to determine the sloping or shoring system which shall be used depending on local soil type, water table elevation, stratification, depth, and any other pertinent factors including the safety of the workers.
PART 2 PRODUCTS
Not Used.
PART 3 EXECUTION
Not Used.
END OF SECTION
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SECTION 332315 – EXCAVATION AND BACKFILL
PART 1 GENERAL
1.1 THE REQUIREMENT
A. The Contractor shall provide all materials, equipment, and labor necessary to perform and complete all utility earthwork as shown on the Drawings and as specified herein.
B. The work of this Section includes all utility earthwork required for construction of the project. Such utility earthwork shall include, but may not necessarily be limited to, the loosening, removing, loading, transportin g, 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 necessarily be limited to, the furnishing, placing, and removing of sheeting, shoring and bracing necessary to safely support the sides of all excavations; all pumping, ditching , draining and other required measures for the removal or exclusion of water from the excavation; soil stabilization; the supporting of structures above and below the ground; all backfilling around structures and all backfilling of trenches; the disposal of excess excavated materials; borrow of materials to make up deficiencies for fills; and all other incidental earthwork.
C. Hazardous materials shall be handled in accordance with all regulatory agency requirements.
1.2 RELATED WORK SPECIFIED ELSEWHERE
A. Section 332250 – Shoring and Trench Safety
B. Section 334000 – Storm Drainage Utilities
C. Section 333600 – Grout
1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. State Codes:
California Labor Code.
Construction Safety Orders of the State of California.
B. State of California (Caltrans) Standards:
1. Standard Specifications:
Section 25 Aggregate Subbases.
Section 26 Aggregate Bases.
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Section 68 Subsurface Drains.
Section 88 Engineering Fabrics
C. Commercial Standards:
ASTM D 422 Test Method for Particle-Size Analysis of Soils.
ASTM D 1556 Test Method for Density 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 Method for Sand Equivalent Value of Soils and Fine
Aggregate.
ASTM D 2487 Test Method for Classification of Soils for Engineering Purposes.
ASTM D 2922 Test Methods for Density of Soil and Soil-Aggregate in Place by Nuclear Methods (Shallow Depth).
ASTM D 3017 Test Method for Water Content of Soil and Rock in Place
by Nuclear Methods (Shallow Depth).
ASTM D 3776 Test Methods for Mass Per Unit Area (Weight) of Woven Fabric.
ASTM D 3786 Method of Hydraulic Bursting Strength of Knitted Goods and Nonwoven Fabrics: Diaphragm Bursting Strength
Tester Method.
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.
ASTM D 6023 Standard Test Method for Density, Yield, Cement
Content, and Air Content of Controlled Low-Strength
Material (CLSM).
OSHA Occupational Safety and Health Administration.
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1.4 CONTRACTOR SUBMITTALS
A. The Contractor's 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 five (5) feet deep or over, shall submit to the Engineer for review for compliance with Section 6705 the Contractor's 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.
If such plan varies from the shoring system standards established in the Construction Safety Orders of the State of California, such alternative system plans shall be prepared, stamped and signed by a civil or structural engineer licensed in the State of California at the Contractor’s expense.
B. For all materials that are not pre-approved by the City the Contractor shall designate the source and/or submit samples of all materials in advance of their use for required testing and Engineer’s approval. All testing costs shall be at the Contractor’s expense.
C. Submit soil stabilization plan stamped and signed by a California registered civil engineer with minimum five (5) years experience with such work.
D. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
1.5 QUALITY ASSURANCE
A. General: All soils and compaction testing will be done by a testing laboratory at the Contractor’s expense and as specified in Section 2, “Special Provisions”. The Engineer shall approve use of the Contractor-selected laboratory prior to the work.
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 densified to a percentage of relative density the calculation of relative density will be determined in accordance with ASTM D 4253 and D 4254.
Field density in-place tests will be performed in accordance with ASTM D 2922, or by such other means acceptable to the Engineer.
C. The Contractor shall notify the Engineer at least 48 hours prior to performing any utility excavation.
PART 2 PRODUCTS
2.1 BACKFILL MATERIALS
A. Backfill shall be a selected or processed clean, fine earth, rock, or sand, free from objectionable material, vegetation, or other deleterious substances.
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B. The following TYPES of backfill materials are designated and defined as follows:
TYPE 1. Sand shall be material with 100 percent passing a 3/8-inch sieve, at least 90 percent passing a No. 4 sieve, and a sand equivalent value not less than 30.
TYPE 2. Class 2 Aggregate Base shall be crushed rock aggregate base material meeting the requirements of Section 26, “Aggregate Bases,” f or 19 millimeter (3/4 inch) maximum grading, of the Caltrans Standard Specifications.
TYPE 3. Class 1, Type A or B, Permeable Material shall be crushed stone, or gravel, durable and free from slaking or decomposition under action or alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(2) for Class 1, “Permeable Material,” of the Caltrans Standard Specifications.
TYPE 4. Class 2 Permeable Material shall be crushed rock or gravel, durable and free from slaking or decomposition under the action of alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(3) for Class 2 "Permeable Material," of the Caltrans Standard Specifications.
TYPE 5. Structure Backfill Material shall meet the requirements of Section 19- 3.02B Type D of the Caltrans Standard Specifications.
TYPE 6. Class 3 Permeable Material shall be ¾” crushed rock or gravel, durable and free from slaking or decomposition under the action of alternate wetting or drying, uniformly graded, and shall meet the requirements of Section 68-2.02F(4) for Class 3 "Permeable Material," of the Caltrans Standard Specifications.
TYPE 7. Manufactured Backfill shall be manufactured, angular, granular, crushed stone, rock, or slag with 100 percent passing a one-inch sieve and less than one percent passing a No. 4 sieve.
TYPE 8. Controlled Low Strength Materials (CLSM) shall conform to the requirements of Section 02320, “Controlled Low Strength Materials (CLSM).”
TYPE 9. Native material shall be material obtained from on-site excavations, provided the materials are not classified as unsuitable. Native material shall be free of stones, lumps, broken concrete or bituminous surfacing over 4 inches in diameter, objectionable material, vegetation, and deleterious substances.
TYPE 10. Topsoil material may be material which has been obtained at the
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site or may be imported. Removal of the topsoil shall be done after the area has been stripped of vegetation and debris as specified.
TYPE 11. Aggregate Subbase shall conform to the grading and quality requirements
of Section 25, “Class 2 Aggregate Subbase” of the Caltrans Standard Specifications.
TYPE 12. Trench Foundation shall be 3/4-inch crushed, angular rock meeting the following gradation:
Sieve
Size
Percent Passing
1 ½” 100%
1” 95-100%
½” 0-30%
#4 0-4%
2.2 UNSUITABLE BACKFILL MATERIAL
A. Any material as determined by the Engineer.
B. Any material determined to be hazardous is defined as unsuitable material.
C. Washed, smooth rock (pea gravel) is classified as unsuitable material.
2.3 USE OF BACKFILL MATERIAL TYPES
A. Backfill material types shall be used in conformance with City standards.
PART 3 EXECUTION
3.1 GENERAL
A. Where abandoned underground structures are encountered in the street areas, remove to sufficient depth to allow underground lines to cross, backfill and compact during rough grading. The Engineer may require further work to be done if visual inspection indicates during construction.
3.2 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 on the Drawings or ordered by the Engineer. 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 measu res required for the removal or exclusion of water, including storm water,
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groundwater, and wastewater reaching the site of the work from any source so as to prevent damage to the work or adjoining property. Excavations shall be supported in a safe manner in accordance with applicable State safety requirements and the requirements of OSHA Safety and Health Standards for Construction (29CFR1926) and Section 02250, “Shoring and Trench Safety.” The limits of structure excavation shall be a minimum of 12 inches beyond the outside edge of the structure, and at a minimum no larger than necessary to facilitate backfill, compaction and testing operations.
3.3 PIPELINE AND UTILITY TRENCH EXCAVATION
A. Trench Width: Unless otherwise shown or directed, excavation for pipelines and utilities shall be open-cut trenches. Trench widths shall be as noted on the plans.
B. Subgrade: The surface of the subgrade after compaction shall be hard, uniform, smooth, self draining, and true to grade and cross section.
C. Trench Bottom: The pipe bedding shall be given a final trim 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 bottom or bedding to form a cradle for the pipe will not be allowed. The Contractor shall excavate for bell holes and fittings.
D. Open Trench: The maximum amount of open trench permitted in any one location shall be the length necessary to accommodate the amount of pipe installed and backfilled in a single day. All trenches shall be fully backfilled at the end of each 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.
E. Over-Excavation: Contractor shall notify Engineer if any unstable trench conditions develop in trench bottom. When ordered by the Engineer, whether or not indicated on the Drawings, trenches, tunneling pits and/or structure excavations shall be over-excavated beyond the depth shown in order to provide a firm and unyielding trench base.
3.4 OVER-EXCAVATION NOT ORDERED, SPECIFIED, OR SHOWN
A. Any over-excavation carried below the grade ordered, specified, or shown, shall be backfilled to the required grade and densified with the specified material and compaction. Such work shall be performed by the Contractor at its own expense.
3.5 EXCAVATION IN LAWN AREAS
A. Where excavation occurs in lawn areas, the sod shall be carefully removed, stockpiled, watered and preserved for replacement, unless specifically approved by Engineer in writing before Work is performed. Excavated material may be placed on the lawn provided that a tarp or other suitable method is employed to
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protect the lawn from damage. The lawn shall not remain stockpiled for more than 48 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 removed sod has remained stockpiled for more than 48 hours.
B. All other landscaping shall be replaced in kind as shown on the Drawings or as directed by the Engineer. All damaged irrigation systems, including piping and electrical wiring, shall be repaired and operating properly the same day they are damaged.
3.6 EXCAVATION IN VICINITY OF TREES
A. Except where trees are shown to be removed, Contractor shall protect trees from injury during construction operations. Remaining trees shall be protected by installing protective fencing outside the dripline. No tree roots over 2 inches in diameter shall be cut without express permission of the Engineer. Trees shall be supported during excavation by any means previously reviewed by the Engineer.
B. If existing roots over one inch in diameter are cut during the course of the work, the cut faces shall be thoroughly coated with root sealer and growth inhibitor.
Exposed roots shall be covered with wet burlap to prevent them from drying out.
C. The City shall retain an arborist to evaluate the health of the trees prior to construction, formulate site-specific recommendations to maintain the health of trees during and after construction, and monitor construction near the trees at appropriate intervals.
3.7 DISPOSAL OF EXCESS EXCAVATED MATERIAL
A. The Contractor shall remove and dispose of all excess excavated material to a suitable site. The proper and legal disposal and associated costs shall be the responsibility of the Contractor.
3.8 BACKFILL - GENERAL
A. Backfill shall not be dropped directly upon any structure or pipe.
B. Unless specifically excepted by the Engineer, backfill shall not be placed until after all water is removed from the excavation.
3.9 PIPE AND UTILITY TRENCH ZONES AND BACKFILL
A. Pipe Zone:
1. The limits of Pipe Zone are shown on the plans.
2. The Pipe Zone shall be backfilled with the specified backfill material. The Contractor shall exercise care to prevent damage to the pipeline coating, cathodic bonds, or the pipe itself during the installation and backfill
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operations.
3. Verify pipe and manhole line and grade prior to installing Pipe Zone material.
4. Prevent flotation of sewer pipe during backfill operations.
5. Pipe Zone material to be compacted to 90% RC, with a maximum 6-inch lifts.
6. Demonstrate in the field and through compaction test results that installation and compaction efforts achieve proper compaction under the pipe haunches. This includes after the removal of shoring devices from the trench.
B. Trench Bedding: The limits of Bedding are shown on the plans.
1. After placement and compacting of the bedding material the Contractor shall perform a final trim 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.
2. Contractor shall support and/or hold-down the pipe during placement as necessary.
3. Bedding shall be placed to form a smooth, uniform, horizontal plane to match pipe slope.
4. Hand-excavate flanges or bell holes at each pipe joint to provide uniform support for all sections of pipe.
C. Trench Zone: 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 limits of Trench Zone are shown on the plans.
D. Utility Crossing: For any new pipeline installation that crosses under an existing electric, gas, telephone, or cable TV utility pipe(s) or conduit(s) the Contractor shall replace the existing backfill material around the existing utility pipe(s) or conduit(s) with CLSM or as directed by the Engineer. For any new pipeline installation crossing under existing storm or sanitary sewer, the contractor shall replace existing backfill material with CLSM or as directed by the Engineer. Use a concrete vibrator during backfilling operations.
3.10 PLACING AND SPREADING OF BACKFILL MATERIALS
A. Backfill materials shall be placed and spread evenly in horizontal layers . The backfill layers shall be evenly spread so that when compacted, each layer shall not exceed 6 inches in thickness. Material for mechanically compacted backfill shall be placed in 8-inch maximum lifts prior to compaction.
B. Where the backfill material moisture content is below the optimum moistur e content water shall be added before or during spreading until the proper moisture content is achieved.
C. Where the backfill material moisture content is too high to permit the specified degree of compaction, the material shall be dried or replaced until the moistu re
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content is satisfactory.
D. Backfill shall be mechanically compacted by means of tamping rollers, sheepsfoot rollers, pneumatic tire roller, vibrating rollers, or other mechanical tampers . All such equipment shall be of a size and type subject to review by the Engineer.
Impact-type pavement breakers (stompers) will not be permitted. Per mission to use specific compaction equipment shall not be construed as guaranteeing or implying that the use of such equipment will not result in damage to adjacent ground, existing improvements, or new improvements. The Contractor shall make its own determination in this regard.
3.11 COMPACTION OF BACKFILL MATERIALS
A. Each layer of backfill material as defined herein, 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 range.
B. Flooding, ponding, or jetting shall not be used.
C. Equipment weighing more than 10,000 pounds shall not be used closer to structure walls than a horizontal distance equal to the depth of the fill against the structure 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. Trench Backfill Requirements: Per City standards.
E. Compaction Requirements for Trench Bedding: Per City standards.
F. Compaction Requirements for Pipe Zone: Contractor shall conduct compaction testing, at a minimum, as follows for Pipe Zone. Additional tests will be required depending on test results and field conditions.
1. Contractor shall demonstrate successful means and methods to meet compaction required.
2. Passing tests are required at one every 300 linear feet of trench.
3.12 SOIL STABILIZATION
A. The Contractor shall install soil stabilization materials to stabilize excavations where not completely and continuously shored.
B. Additional stabilization of existing utility trench backfill and bedding materials via permeation grouting is required to prevent raveling of materials during excavation operations including coarse, granular, non-cohesive trench backfill and pipe embedment materials.
C. Utilities parallel to new sewer or storm drain mains:
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1. Minimum limits of grouting shall be per the following:
a. Where separation is less than 4 feet.
b. Vertical limits shall apply to any areas disturbed by excavation and as directed by the Engineer.
D. Utilities crossing new sewer or storm drain main:
1. Minimum limits of grouting shall be per the following:
a. 2 feet beyond edge of existing utility.
b. Vertical limits shall apply to any areas disturbed by excavation and as shown directed by the Engineer.
E. For utilities not shown on the Plans, the minimum limits described for existing utilities parallel to or crossing the new sewer main shall apply.
F. The Contractor shall submit a soil stabilization plan for review.
G. Existing gravity utilities shall be protected from grout intrusion into the utility. To protect City storm drains and existing sewers to remain in service against damage from grouting, such utilities shall be inspected using CCTV after soil stabilization to determine whether grout has penetrated the gravity utility. If grout is found in the utility, Contractor shall remove all grout and re-inspect said utility to demonstrate grout removal, at no additional cost to the owner. If desired, Contractor shall be allowed to inspect the existing gravity utilities prior to grouting to establish existing condition and at no additional cost to the City.
END OF SECTION
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SECTION 333600 – GROUT
PART 1 GENERAL
1.1 THE REQUIREMENT
A. The CONTRACTOR shall provide all materials, equipment, and labor necessary to furnish and place grout and shall form, mix, place, cure, repair, finish, and do all other work as necessary to produce finished grout as shown on the Drawings and as specified herein.
B. The following types of grout shall be covered in this Section:
1. Non-Shrink Grout: Non-Shrink grout is to be used unless another type is specifically referenced or as shown on the Drawings.
2. Epoxy Grout
3. Cement Grout
4. Flowable Cement Grout
5. Low Viscosity (Permeation) Grout and Fast Setting Injected Grout
6. Polymer Grout
7. Neat Cement Grout
1.2 RELATED WORK SPECIFIED ELSEWHERE
A. Section 013300 – Contractor Submittals
B. Section 015600 – Protection of Existing Facilities
C. Section 332315 – Excavation and Backfill
D. Section 333400 – Storm Drainage Utilities
E. Division 1 – General Requirements.
1.3 REFERENCE SPECIFICATIONS, CODES, AND STANDARDS
A. Commercial Standards:
ASTM C109 Test Method for Compressive Strength of
Hydraulic Cement Mortars (Using 2-In. or 50-
mm Cube Specimens).
ASTM C531 Test Method for Linear Shrinkage and
Coefficient of Thermal Expansion of
Chemical-Resistant Mortars, Grouts, and
Monolithic Surfacings.
ASTM C579 Test Methods for Compressive Strength of
Chemical- Resistant Mortars, Grouts, and
Monolithic Surfacings.
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ASTM C827 Test Method for Change in Height of Early
Ages of Cylindrical Specimens from
Cementitious Mixtures.
ASTM D696 Test Method for Coefficient of Linear
Thermal Expansion of Plastics.
CRD-C 621 Corps of Engineers Specification for Non-shrink Grout.
1.4 CONTRACTOR SUBMITTALS
A. Certificates of Compliance: Certificates of Compliance shall be provided for all products and materials proposed to be used under this Section.
PART 2 PRODUCTS
2.1 PREPACKAGED GROUTS
A. Non-Shrink Grout:
1. Non-shrink grout shall be a prepackaged, inorganic, non-gas-liberating, non- metallic, cement-based grout requiring only the addition of water.
Manufacturer's instructions shall be printed on each bag or other container in which the materials are packaged. The specific formulation for each class of non-shrink grout specified herein shall be that recommended by the manufacturer for the particular application.
2. Class A non-shrink grouts shall have a minimum 28-day compressive strength of 5,000 psi; shall have no shrinkage (zero percent) and a maximum 4.0 percent expansion in the plastic state when tested in accordance with ASTM C 827; and shall have no shrinkage (zero percent) and a maximum of 0.2-percent expansion in the hardened state when tested in accordance with CRD C 621.
3. Class B non-shrink grouts shall have a minimum 28-day compressive strength of 5,000 psi and shall meet the requirements of CRD C 621.
4. Application:
a. Class A non-shrink grout shall be used for the repair of all holes and defects in concrete members which are water bearing or in contact with soil or other fill material, grouting under all equipment base plates, and at all locations where grout is specified; except, for those applications for Class B non-shrink grout and epoxy grout specified herein. Class A non-shrink grout may be used in place of Class B non-shrink grout for all applications. Apply Class A grout to annular spaces, specifically where PVC sanitary sewer connects to pre-cast manholes.
b. Class B non-shrink grout shall be used for the repair of all holes and defects in concrete members which are not water-bearing and not in contact with soil or other fill material.
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B. Epoxy Grout:
1. Epoxy grout shall be a pourable, non-shrink, 100-percent solids system.
The epoxy grout system shall have 3 components: resin, hardener, and specially blended aggregate, all premeasured and prepackaged. The resin component shall not contain any non-reactive diluents. Resins containing butyl glycidyl ether (BGE) or other highly volatile and hazardous reactive diluents are not acceptable. Variation of component ratios is not permitted unless specifically recommended by the manufacturer. Manufacturer's instructions shall be printed on each container in which the materials are packaged.
2. The chemical formulation of the epoxy grout shall be that recommended by the manufacturer for the particular application.
3. The mixed epoxy grout system shall have a minimum working life of 45 minutes at 75 degrees F.
4. The epoxy grout shall develop a compressive strength of 5,000 psi in 24 hours and 10,000 psi in 7 days when tested in accordance with ASTM C 579, Method
B. There shall be no shrinkage (zero percent) and a maximum 4.0 percent expansion when tested in accordance with ASTM C 827.
5. Application: Epoxy grout shall be used to embed all anchor bolts and reinforcing steel required to be set in grout, and for all other specified applications.
2.2 CEMENT GROUT
A. Cement Grout: Cement grout shall be composed of one part cement, 3 parts sand, and the minimum amount of water necessary to obtain the desired consistency. Where needed to match the color of adjacent concrete, white portland cement shall be blended with regular cement as needed. The minimum compressive strength at 28 days shall be 4,000 psi.
B. Cement shall be as specified in Section 02537, “Precast Concrete Manholes.” C. Cement Grout shall not be used as Contact Grout for filling voids created during a tunnel or shaft excavation.
2.3 FLOWABLE CEMENT GROUT
A. Flowable Cement Grout: Minimum penetration resistance of 10 psi in 24 hours when tested in accordance with ASTM C403 and a 28-day unconfined compressive strength of 45-165 psi.
B. Application:
1. Void spaces between the earth and the casing pipe.
2. Interstitial space between the casing pipe and carrier pipe.
2.4 LOW VISCOSITY (PERMEATION) GROUT AND FAST SETTING INJECTED GROUT
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A. Low viscosity grout shall be injected to provide stabilization for the following conditions:
1. Stabilize existing utility pipelines during trenching and excavation activities to prevent destabilization of materials when exposed in vertical excavations.
2. Stabilize materials that would be subject to vibration densification during nearby sheet pile driving or construction activity.
3. Prevent porous and permeable materials from transmitting perched groundwater into project excavations.
B. The low viscosity grout shall consist of Portland cement, water and fluidizer additives.
C. Grouting should completely bind the granular material into a single coherent grouted mass (grouted prism).
D. Grout batch records shall include time of mix, amount and type of components used, and anticipated set times.
E. Fast Setting Injected Grout shall be used in establishing bulkheads to limit the spread/flow of low viscosity grout. Mix according to the following proportions:
1. Component A:
a. Portland Cement Type I-II 8 sacks @ 94 lbs. per sack b. Bentonite suspending agent 0-50 lbs.
c. PGA expansion agent 0-3 lbs.
2. Component B:
a. Sodium silicate 40 gallons
b. Water
2.5 NEAT CEMENT GROUT
A. Application: Use for dewatering well abandonment.
B. Mix according to the following ratio:
1. 94 lbs. Portland Type II cement.
2. 5 gallons clean water.
3. Up to 5% bentonite powder or chips.
2.6 PRESSURE GROUTING EQUIPMENT
A. Pressure grouting equipment shall include a mixer and holdover agitator tanks.
Gages shall be provided to indicate pressure used. The mixer shall be provided with a meter capable of indicating to one-tenth of a cubic foot the volume of grout used. The grout pump shall be capable of pumping low viscosity grout.
2.7 CONSISTENCY
A. The consistency of grouts shall be that necessary to completely fill the space to
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be grouted for the particular application. Dry pack consistency is such that the grout is plastic and moldable but will not flow. Where "dry pack" is specified, it shall mean a grout of that consistency; the type of grout to be used shall be as specified herein for the particular application.
2.8 MEASUREMENT OF INGREDIENTS
A. Measurements for cement grout shall be made accurately by volume using appropriate containers. Shovel measurement will not be allowed.
B. Prepackaged grouts shall have ingredients measured by means recommended by the manufacturer.
PART 3 EXECUTION
3.1 GENERAL
A. The finish of the grout surface shall match that of the adjacent concrete.
B. The manufacturer of Class A non-shrink grout and epoxy grout shall provide on- site technical assistance upon request.
C. All mixing, surface preparation, handling, placing, consolidation and other means of execution for prepackaged grouts shall be done according to the printed instructions and recommendations of the manufacturer.
3.2 CONSOLIDATION
A. Grout shall be placed in such a manner, for the consistency necessary for each application, so as to assure that the space to be grouted is completely filled.
3.3 APPLICATION
A. Prior to placement of any subsurface grout, Contractor shall notify USA to mark subscribing subsurface utilities in the vicinity of planned excavations and grouting. Use project drawings and make detailed site inspections to locate existing subsurface utilities prior to beginning grouting/excavation operations.
B. Grouting is to be done prior to shoring installation and prior to any dewatering.
C. Grout mix shall be designed and injected at pressures that will not damage adjacent utilities. No heave of ground surface shall be allowed and all existing utilities, pipelines, and structures shall be protected from damage during application and curing of grout. Install temporary elevation benchmarks in grouting areas and at suitable distances outside of grouting areas to provide reference checks against existing elevations. Monitor elevations of existing improvements including utilities during all grouting operations and maintain daily logs of cumulative changes in benchmark elevations.
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D. Provide constant monitoring of existing gravity utilities to verify no inflow of grout during grout pumping operations. Immediately cease grout pumping if intrusion occurs. Contractor is responsible to remove grout from any affected utilities.
E. Notify the City immediately if elevation changes greater than 0.25-inches occur and immediately cease all work in and around the affected area. Revise and resubmit grouting plan for review by the Engineer prior to continuation of work in the affected area.
F. Pump grout through grout injection casings until grout returns are noted in the next adjacent pre-drilled/drive grout injection casing.
G. Coordinate grout injection pressures (always to be less than pressures that could damage existing utilities), grout fluidity/set times and grout injection casing layout dimensions.
H. Maintain daily log of grouting operations including grout injection casing number, location, grouting pressure and rate, stage depth and grout quantity and batch used.
I. Samples shall be taken from each batch mixed and properly identified, stored and tested to verify that compressive strength is with specified range.
J. During and upon completion of grouting, the work area shall be cleaned and restored to original condition including adequate disposal of all generated waste and wastewater.
K. Repair the top of each grout injection hole to match existing pavement grade.
END OF SECTION
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Attachment: Plans and Specs - HAWK Signal at Belmont Ave-El Camino Real (HAWK Signal Plans and Specs) Technical Specifications HAWK Signal at Belmont Ave-El Camino Real Page TP-118 Project No. C1807
SECTION 344133 – PEDESTRIAN WARNING LIGHTS
PART 1 - GENERAL
1.1 WORK INCLUDED
A. PEDESTRIAN WARNING LIGHTS consists of furnishing transportation, labor, materials, and equipment to:
1. Install Pedestrian Hybrid Beacon Systems.
2. Cabinet, controller, clock, conduit, conductor, wire components.
3. Mount separate pedestrian push button to pole and trench wire connection.
4. Install appropriate signage.
5. Loop detectors.
6. Pull boxes and hand holes.
1.2 REFERENCES
A. California Manual on Uniform Traffic Control Devices (current edition) B. Caltrans Standard Details
1.3 QUALITY ASSURANCE
A. The Engineer reserves the right to inspect the manufacture or fabrication. The Engineer's inspection of the work does not relieve the Contractor of the responsibility for the work. Errors or faults that are discovered during fabrication shall be corrected by the Contractor prior to installation.
PART 2 - PRODUCTS
2.1 FABRICATION
A. Signage and pedestrian hybrid beacon system shall be complete for proper installation as shown on project plans.
B. Finished work shall be firm, well anchored, in true alignment, properly squared, with smooth clean uniform appearance, without holes, cracks, discoloration, distortion, stains, or marks.
C. Construct work to eliminate burrs, dents, cutting edges, and sharp corners.
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D. Except as indicated or directed otherwise, finish all surfaces smooth.
E. Surfaces which are intended to be flat shall be without dents, bulges, oil canning, gaps, or other physical deformities.
F. Surfaces which are intended to be curved shall be smoothly free-flowing to required shapes.
G. Conceal all fasteners.
H. Make access panels tight-fitting, light proof, and flush with adjacent surfaces.
I. Carefully follow manufacturer’s recommended fabricating procedures regarding expansion or contraction, fastening, and restraining of acrylic plastic J. Exercise care to ensure that painted, polished, and plated surfaces are unblemished in the finished work.
K. Isolate dissimilar materials. Exercise particular care to isolate nonferrous metals from ferrous metals.
L. All illumination shall be even and without hot spots.
M. Ease all exposed metal edges.
N. Provide miscellaneous metal items required for completion of the work even though not shown or specified.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Guard against damaging existing pavements and planting where signage is to be installed.
B. For any pole foundation installations, sonotubes shall be used as necessary for protection of any existing utilities. Compensation for this work shall be included in the various other items of work and no separate payment will be made therefor.
3.2 CLEAN UP
A. Keep areas of work clean, neat and orderly at all times. Clean surfaces, inside and out.
Use approved cleaners if necessary to remove dirt.
B. Protective coverings and strippable films shall be removed at a time that will afford the greatest protection of the signage. Surfaces shall be cleaned to remove excess glazing and sealant compounds, dirt, and other substances.
C. Upon completion of work and before final acceptance, remove tools, surplus materials,
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Attachment: Plans and Specs - HAWK Signal at Belmont Ave-El Camino Real (HAWK Signal Plans and Specs) Technical Specifications HAWK Signal at Belmont Ave-El Camino Real Page TP-120 Project No. C1807
apparatus, and debris from the site. Leave the site in a neat, and clean condition.
Wash, clean, and leave paved areas without stains.
3.3 FINAL INSPECTION AND ACCEPTANCE
A. Upon completion of work, a final inspection for acceptance will be performed by the Engineer.
END OF SECTION
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Attachment: Plans and Specs - HAWK Signal at Belmont Ave-El Camino Real (HAWK Signal Plans and Specs)
APPENDIX A
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Attachment: Plans and Specs - HAWK Signal at Belmont Ave-El Camino Real (HAWK Signal Plans and Specs) STATE OF CALIFORNIA • DEPARTMENT OF TRANSPORTATION
ENCROACHMENT PERMIT Permit No.
04-21-N-SN-2469
TR-0120 (REV 6/2012)
Dist/Co/Rte/PM
In compliance with (Check one): 04/SM/82/5.5
DATE
Your application of August 12, 2021 August 17, 2021
Fee Paid Deposit
Utility Notice No. of $ Exempt $ Exempt
Performance Bond Amount Payment Bond Amount
Agreement No. of $ N/A $ N/A
Bond Company
R/W Contract No. of N/A
Bond Number (1) Bond Number (2)
N/A N/A
TO: City of San Carlos
600 Elm Street
San Carlos, CA 94070
Email: [email protected]
Attn: Mr. Evan Cai
Phone: (650) 802-4196 , PERMITTEE
and subject to the following, PERMISSION IS HEREBY GRANTED to:
Install, own, operate, and maintain a new pedestrian hybrid beacons (HAWKs) include conduit, cabinets, controller, wireless modem, and push button; install signage and striping at the intersection of El Camino Real and Belmont Avenue, on State Highway 04-SM-82, Post Mile 5.53, in the City of San Carlos.
A minimum of 7 days prior to the start of work under this encroachment permit, notice must be given to State Representative Roy Chen, at [email protected] or (510) 385-6741, weekdays between 7:00 a.m. and 3:30 p.m., excluding holidays.
Notwithstanding General Provision 35, lane closures and other activities that may cause a traffic impact requires the permittee to apply for and obtain a closure ID prior to the start of work. Requests must be submitted using the attached “Encroachment Permit Work Scheduling Request Form.”
THIS PERMIT IS NOT A PROPERTY RIGHT AND DOES NOT TRANSFER WITH THE PROPERTY TO A NEW OWNER.
The following attachments are also included as part of this permit (Check applicable):
Yes No General Provisions (TR-0045)
Yes No Utility Maintenance Provisions
Yes No Special Provisions (TR-0408).
Yes No A Cal-OSHA permit, if required: Permit No.
Yes No As-Built Plans Submittal Route Slip for Locally Advertised Projects Yes No Water Pollution Control Documents (SWPPP/WPCP/TR-0400) In addition to fee, the permittee will be billed
actual costs for:
Yes No Review
Yes No Inspection
Yes No Field Work
(If any Caltrans effort expended)
Yes No The information in the environmental documentation has been reviewed and considered prior to approval of this permit.
This permit is void unless the work is completed before July 1, 2022.
This permit is to be strictly construed and no other work other than specifically mentioned is hereby authorized.
No project work must be commenced until all other necessary permits and environmental clearances have been obtained.
DLau APPROVED:
AMJAD NASEER, District Permit Engineer c: EShermanIII (2) D4 Construction – Roy Chen
DTM – Gilbert Wu
TMC
Electrical Maintenance – Sandra Michelotti
BY:
FRED FARID, Acting Senior Permit Engineer
ADA Notice For individuals with sensory disabilities, this document is available in alternate formats. For information call (916) 654-6410 or TDD (916) 654-3880 or write Records and Forms Management, 1120 N Street, MS-89, Sacramento, CA 95814.
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Attachment: Plans and Specs - HAWK Signal at Belmont Ave-El Camino Real (HAWK Signal Plans and Specs) City of San Carlos
0421-NSN-2469
August 17, 2021