Ukiah City Council
March 1, 2023

DOWNTOWN STREETSCAPE PROJECT
PHASE II 44 Spec No.2021-179
Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
109. Full compensation for Traffic Stripe (Detail 39) will be measured and paid for at the contract unit price per linearfoot, which price shall include full compensation for furnishing all plant, labor, materials, tools and equipment and doing all the work necessary for the installation of traffic stripe per the Standard Detail, including but not limited to surface preparation, establishing layout and alignment, thermoplastic, adhesive, pavement markers, and temporary striping, as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
110. Full compensation for Traffic Stripe (Detail 39A) will be measured and paid for at the contract unit price per linear foot, which price shall include full compensation for furnishing all plant, labor, materials, tools and equipment and doing all the work necessary for the installation of traffic stripe per the Standard Detail, including but not limited to surface preparation, establishing layout and alignment, thermoplastic, adhesive, pavement markers, and temporary striping, as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
111. Full compensation for Traffic Stripe (Detail 40) will be measured and paid for at the contract unit price per linear foot, which price shall include full compensation for furnishing all plant, labor, materials, tools and equipment and doing all the work necessary for the installation of traffic stripe per the Standard Detail, including but not limited to surface preparation, establishing layout and alignment, adhesive, pavement markers, and temporary striping, as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
112. Full compensation for Green Bike Lane Pavement Markings will be measured and paid for at the contract unit price per square foot, which price shall include full compensation for furnishing all plant, labor, materials, tools and equipment and doing all the work necessary for the installation of the pavement markings including but not limited to surface preparation, establishing layout and alignment, and temporary striping, as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor. 113. Full compensation for Modify Signal (Gobbi St and S State St) will be paid for at the contract lump sum price, which price shall constitute full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in furnishing and installing, modifying, and removing the traffic signal, including but not limited to all demolition, salvage and relocation work, conduit, conductors, pull boxes, cleaning existing conduits to remain, boxes and pull rope, excavation, backfill, compaction, signal poles and mast arms, cleaning and painting existing poles in place, painting of new poles, signal pole foundations, temporary traffic signals, luminaires, signs, signal heads, splicing, video detection system, functional testing and all other work required for a complete and operating system as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
114. Full compensation for Modify Signal (Mill St and S State St) will be paid for at the contract lump sum price, which price shall constitute full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in furnishing and installing, modifying, and removing the traffic signal, including but not limited to all demolition, salvage and relocation work, conduit, conductors, pull boxes, cleaning existing conduits to remain, boxes and pull rope, excavation, backfill, compaction, signal poles and mast arms, cleaning and painting existing poles in place, painting of new poles, signal pole foundations, temporary traffic signals, luminaires, signs, signal heads, splicing, video detection system, functional testing and all other work required for a complete and operating system as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
115. Full compensation for Modify Signal (Scott St and N State St) will be paid for at the contract lump sum price, which price shall constitute full compensation for furnishing all labor, materials, tools, equipment, and incidentals, and for doing all the work involved in furnishing and installing, modifying, and removing the traffic signal, including but not limited to all demolition, salvage and relocation work, conduit, conductors, pull boxes, cleaning existing conduits to remain, boxes and pull rope, excavation, backfill, compaction, signal poles and mast arms, cleaning and painting existing poles in place, painting of new poles, signal pole foundations, temporary traffic signals, luminaires, signs, signal heads, splicing, video detection system, functional testing and all other work required for a complete and operating system as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.

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PHASE II 45 Spec No.2021-179
116. Full compensation for Lighting System will be measured and paid for at the contract lump sum price, which price shall include full compensation for furnishing all labor, materials, tools, equipment, transportation and incidentals, and for doing all the work involved in furnishing and installing decorative street lighting standards, LED luminaires, photo cells and photo controls, foundations, pull boxes, electrical service connections, trenching, backfill, street light conduit, splicing, and conductors from luminaire to pull box, pole coating touchup, and coordination with the City of Ukiah Electric Department as shown on the Plans and Standard Plans, and specified in the Standard Specifications and these Construction Details, and no additional allowances will be made therefor.
117. Full compensation for EXCAVATE, TRENCH, BACKFILL AND COMPACTION (12 INCH X 36 INCH TRENCH) will be measured and paid for at the contract unit price per linear foot, which price shall include full compensation for furnishing full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in demolition of existing improvements, excavation, trench preparation, backfill and compaction of the utility joint trench including dewatering and groundwater disposal; hand digging to protect roots; root pruning; abandonment, backfill material, controlled low strength material if used; temporary and permanent trench paving; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 118. Full compensation for EXCAVATE, TRENCH, BACKFILL AND COMPACTION (18 INCH X 48 INCH TRENCH) will be measured and paid for at the contract unit price per linear foot, which price shall include full compensation for furnishing full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in demolition of existing improvements, excavation, trench preparation, backfill and compaction of the utility joint trench including dewatering and groundwater disposal; hand digging to protect roots; root pruning; abandonment, backfill material, controlled low strength material if used; temporary and permanent trench paving; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 119. Full compensation for EXCAVATE, TRENCH, BACKFILL AND COMPACTION (24 INCH X 59 INCH TRENCH) will be measured and paid for at the contract unit price per linear foot, which price shall include full compensation for furnishing full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in demolition of existing improvements, excavation, trench preparation, backfill and compaction of the utility joint trench including dewatering and groundwater disposal; hand digging to protect roots; root pruning; abandonment, backfill material, controlled low strength material if used; temporary and permanent trench paving; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 120. Full compensation for all 1 INCH PVC SCH 40 CONDUIT (COMCAST) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
121. Full compensation for all 2 INCH PVC SCH 40 CONDUIT (COMCAST) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
122. Full compensation for all 3 INCH PVC SCH 40 CONDUIT (COMCAST) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
123. Full compensation for all 2 INCH PVC SCH 40 CONDUIT (AT&T) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.

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124. Full compensation for all 4 INCH PVC SCH 40 CONDUIT (AT&T) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
125. Full compensation for all 3 INCH PVC SCH 40 CONDUIT (Electric) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
126. Full compensation for all 3 INCH PVC SCH 40 CONDUIT (Electric) INCLUDING INSTALLATION will be measured and paid for at the contract unit price per foot, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the conduit including all fittings, complete in place, testing and acceptance and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications and no additional allowance will be made therefor.
127. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL CABLE SERVICE VAULTS B48 (COMCAST) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 128. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL CABLE SERVICE VAULTS N36 (COMCAST) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 129. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL CABLE SERVICE VAULTS N30 (COMCAST) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 130. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL SERVICE VAULTS 17" X 30" X 24" (AT&T) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 131. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL SERVICE VAULTS 2'6" X 4' X 3' (AT&T) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any

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other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 132. Full compensation for all EXCAVATE, BACKFILL, COMPACT AND INSTALL SERVICE VAULTS 3' X 5' X 4' (AT&T) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in furnishing and installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor.
133. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL PEDESTEL BOX PAD (CITY TO PROVIDE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the box, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor.
134. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL 504LA VAULT (CITY TO PROVIDE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the vaults, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor.
135. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL PPB PRIMARY JUNCTION BOX (CITY TO PROVIDE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the box, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 136. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL TRANSFORMER BOX PAD (CITY TO PROVIDE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the pad, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor.
137. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL CONCRETE TRANSFORMER PAD (POUR IN PLACE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the pad, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor. 138. Full compensation for all EXCAVATE, BACKFILL, COMPACTION AND INSTALL SECONDARY SERVICE BOX (CITY TO PROVIDE) will be measured and paid for at the contract unit price per each, which price shall include full compensation for furnishing all labor, materials, tools and equipment and doing all the work involved in installing the box, as shown on the plans, complete in place; all excavation & disposal of excavated materials; connecting to new or existing conduit; dewatering and groundwater disposal; controlled low strength material if used; frames and covers; testing; and any other items when required by the work or shown on the Plans, not specifically enumerated in the Plans or these specifications, and no allowance will be made therefor.

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DIVISION II GENERAL CONSTRUCTION
10 GENERAL
No Changes.
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11 WELDING
No Changes
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12 TEMPORARY TRAFFIC CONTROL
Add to section 12-1.01:

Prior to commencing construction which will affect existing traffic, the Contractor shall submit for review by the Engineer, a Traffic Control Plan on 11" x 17" paper which contains only information specifically related to work zone traffic control, including pedestrian traffic control. The plan will show which California MUTCD typical application is to be used for each work operation. If the Contractor proposed to use the current edition of the MUTCD in specific work operations, they shall submit in writing for consideration which Typical Application Diagram will be used for each work operation. A Traffic Control Plan or proposal shall be submitted to the Engineer for review at least two weeks prior to implementation. Upon request, the Contractor shall submit to the Engineer a sketch showing the proposed signing and barricading to be used in the project.

The Traffic Control Plan shall be prepared by, sealed and signed a California licensed civil or traffic engineer and contain a title block which contains the Contractor's name, address, phone number, project superintendent's name, contract name, dates and hours traffic control will be in effect, and a space for review acknowledgment.

The content of the Traffic Control Plan shall include, but is not limited to, the following:

A. Show location and limits of the work zone.

B. Give dimensions of lanes affected by traffic control that will be open to traffic.

C. Indicate signing, cone placement, and other methods of delineation and reference to appropriate City or Caltrans standard.

D. Dimension location of signs and cone tapers.

E. Identify side streets and driveways affected by construction and show how they will be handled.

F. Show how pedestrian access to businesses will be maintained through the construction site.

G. Show how pedestrian traffic will be handled through the construction site.

H. Show how public transit will be handled through the construction area.

I. Demonstrate how two-way traffic will be maintained.

J. Identify message board locations. A minimum of four (4) changeable message boards and four (4) arrow boards shall be required.

No work except for installation of project identification signs will be allowed to commence prior to approval of the Work Zone Traffic Control Plan.

Traffic shall be maintained at all times as provided in these Special Provisions except as otherwise approved by the

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Engineer.

The Contractor will be required to keep all residents and businesses notified of the work schedule as it affects their access.

The Contractor shall maintain contact with the Ukiah Electric Utility Department dispatch office regarding start and completion of the following:
• Construction activity that may impede emergency vehicles, school buses, etc. • Construction activity such as trenches or other excavation that prohibit access. • Construction activity that removes a fire hydrant from service.

The Contractor shall provide the name and telephone number of a person directly responsible for the construction activity to the Ukiah Police and Fire Departments and Life Medical Paramedic Ambulance Service.

The Contractor shall be responsible for supplying, installing and maintaining such fences, barriers, lights, signs and flaggers as are necessary to give adequate warning to the public at all times that the road or street is under construction and of any dangerous conditions to be encountered as a result thereof.

All traffic control equipment shall be removed when it is no longer required Replace section 12-1.03 with:

The Contractor shall be responsible for all costs of furnishing all flaggers, including transporting flaggers and furnishing all materials and equipment to provide passage of traffic through the work as specified in section 7-1.03 and 7-1.04.

Add to section 12-3.01A(1):

Construction area traffic control signs, equipment and devices shall be furnished, installed, maintained, and removed when no longer required in accordance with the provisions in Section 7-1.03 and Section 12 of the Standard Specifications, the latest edition of the California Manual on Uniform Traffic Control Devices (MUTCD), and as directed by the Engineer.

Notify Underground Services Alert (USA) at (800) 227-2600 or 811 a minimum of two (2) working days prior to installing signposts.

Attention is directed to Sections 7-1.03, "Public Convenience," 7-1.04, "Public Safety," and 12, "Temporary Traffic Control," of the Standard Specifications and to the Section entitled "Public Safety" elsewhere in these Special Provisions. Nothing in these Special Provisions shall be construed as relieving the Contractor from these responsibilities.

Replace section 12-3.20D with:

Attention is directed to "Public Safety" and "Order of Work" of these special provisions.

Temporary railing (Type K) placed in conformance with the provisions in "Public Safety" of these special provisions will be neither measured nor paid for. The cost to provide temporary railing (Type K) is included in the various items of work.

Add to section 12-3.32C:

Start displaying the message on the portable changeable message signs 15 minutes before closing the lane.

Provide four (4) portable changeable message signs.

Place the portable changeable message signs in advance of the 1st warning sign for each:

1. Stationary lane closure

2. Detour

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For 5 days, starting on the day of Notice of Substantial Completion, place 1 portable changeable message sign in each direction of travel located 300 feet in advance of the northern and southern project limits and display the following message: "CHANGED CONDITIONS AHEAD."
Add to section 12-3.10:

If it becomes necessary for the City of Ukiah to replace or place additional barricades in order to provide adequate safety to the public, the Contractor will be charged $1 per barricade per day or portion thereof plus the cost of placement and removal.

The Contractor will also be charged for replacement of damaged City barricades. The Contractor shall furnish and place barricades within 3 working days. No removal charge will be made if the Contractor returns City barricades to the Municipal Service Center.

Add to section 12-3.10:

The contractor will provide and maintain ALL necessary signs and materials to ensure the public is aware of any limitation, including detours, on-way streets, street closure, turn movement restrictions, lane closures, and any other signage necessary. Contractor will also provide Business Open and similar signs as will be requested as part of the traffic plan approval.

Add to section 12-4.02A:

The Work Area shall be open to through vehicular traffic during non-working hours. All public traffic shall be permitted to pass through the work with as little inconvenience and delay as possible. Access to abutting property, businesses and driveways shall be maintained during the performance of the work. The Contractor is advised that commercial businesses abut the entire Project Area. The Contractor shall provide advance written notification of the work and of temporary closures of driveways to the abutting owners or managers of the business at least five (5) business days prior to the start of the Work or the temporary closure of the driveway to the respective business property. The format and content of the Notice by the Contractor shall be approved by the Engineer prior to its issuance to the public. The Contractor shall provide trench plates at driveways and left turn pockets after the trench and roadway excavation has been made at those particular locations.

Full costs for "Traffic Control System," including "Flagging Costs" and providing and maintaining access to abutting property, shall be considered as included in the bid item for “Traffic Control System,” and no additional compensation will be made therefor.

Designated holidays are shown in the following table:

Designated Holidays
Holiday Date observed
New Year's Day January 1st
Washington's Birthday 3rd Monday in February
Memorial Day Last Monday in May
Independence Day July 4th
Labor Day 1st Monday in September
Veterans Day November 11th
Thanksgiving Day 4th Thursday in November
Christmas Day December 25th
If a designated holiday falls on a Sunday, the following Monday is a designated holiday. If November 11th falls on a Saturday, the preceding Friday is a designated holiday.

Personal vehicles of your employees shall not be parked on the traveled way or shoulders, including sections closed to traffic.

For all work, if work vehicles or equipment are parked within 6 feet of a traffic lane, close the shoulder area with

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fluorescent orange traffic cones or portable delineators. Place the cones or delineators on a taper in advance of the parked vehicles or equipment and along the edge of the traveled way at 25-foot intervals to a point not less than 25 feet past the last vehicle or piece of equipment. Use at least 9 cones or delineators for the taper. Use a W20-1, "Road Work Ahead," W21-5b, "Right/Left Shoulder Closed Ahead," or C24(CA), "Shoulder Work Ahead," sign mounted on a crashworthy, portable sign support with flags. The sign must be 48 by 48 inches and placed as ordered by the Engineer.

If a cone or delineator is displaced or overturned, immediately restore the device to its original position or location.

No work shall commence until Contractor’s Traffic Control Plan has been approved by the Engineer.

Exact locations of Project Identification signs and Advance Notice signs shall be determined in the field by the Engineer.

Except as noted elsewhere, only one lane may be closed at a time and no lanes shall be closed at any other hours unless specifically approved by the Engineer. The Contractor shall maintain vehicle access to adjacent streets, homes, businesses and other properties at all times while work is in progress except when necessary construction precludes such access for reasonable periods of time as determined by the Engineer.

When traffic cones or delineators are used to delineate a temporary edge of a traffic lane, the line of cones or delineators shall be considered to be the edge of the traffic lane, however, the Contractor shall not reduce the width of an existing lane to less than 12 feet without written approval from the Engineer.

The Contractor will be required to maintain vehicle access to homes, businesses and other properties within the block where work is in progress.

The Contractor shall maintain 2-way traffic for all work on State Street.

The Contractor shall keep the City of Ukiah Fire Department informed regarding the closure of any traveled way. At a minimum, the Contractor shall call the Fire Department at (707) 463-6261 daily to report any traveled way closure. This requirement applies immediately upon closure for that day and again immediately after removal of the closure. For closures over multiple days, the daily notification still applies. This requirement does not apply for single lane closures on multiple lane local streets.

If the Contractor has been given an approved Traffic Control Plan that includes road closures, they will be required to maintain vehicular access to homes, businesses and other properties where work is in progress within the closure area.

Existing and regulatory signs are to be temporarily relocated, as directed by the Engineer, until new traffic signals are in place and operable for two-way traffic.

Seventy-two (72) hours prior to construction, the Contractor shall place a notice on each front door, and attempt to notify each owner or tenant verbally that work will be underway within his block between stated hours, and request that cars be parked out of the roadway by 9:00 a.m. Service of notice shall not bar use of cars within the block; however, as individual plans change and emergencies may arise.

Cross streets will require maintenance of at least one-half (½) width of each street for traffic purposes, unless a parallel route is approved by the Engineer. Flagging will only be allowed between the hours of 9:00 a.m. and 3:00 p.m.

Existing traffic signals shall remain in service at all times.

Barricades and flaggers shall be positioned to allow safe turns at intersections.

Replace section 12-4.02A(3)(b) with:

Every Monday by noon, submit a closure schedule request of planned closures for the next week period. The next week period is defined as Friday midnight through the following Friday midnight.

Submit a closure schedule request not less than 25 days and not more than 125 days before the anticipated start of any activity that reduces:

1. Horizontal clearances of traveled ways, including shoulders, to 2 lanes or less due to activities such as temporary barrier placement and paving

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2. Vertical clearances of traveled way, including shoulders, due to activities such as pavement overlays, overhead sign installation, falsework, or girder erection
Submit closure schedule amendments, including adding additional closures, by noon at least three (3) business days before a planned closure.

Cancel closure requests by notifying the City at least 48 hours before the start time of the closure.

You will be notified by the City of unauthorized closures or closures that require coordination with other parties as a condition for authorization.

The Engineer may reschedule a closure cancelled due to unsuitable weather.

If a closure is not opened to traffic by the specified time, suspend work. No further closures are allowed until the Engineer has reviewed and authorized a work plan submitted by you that ensures that future closures will be opened to traffic by the specified time. Allow 2 business days for review of your proposed work plan. The City does not compensate you for your losses due to the suspension of work resulting from the late opening of closures.

Notify the Engineer of delays in your activities caused by:

1. Your closure schedule request being denied although your requested closures are within the specified time frame allowed for closures. The City does not compensate you for your losses due to amendments to the closure schedule that are not authorized.

2. Your authorized closure being denied.

If you are directed to remove a closure before the time designated in the authorized closure schedule, you will be compensated for the delay.

Replace section 12-4.02C(3)(f) with:

Replace "Reserved" in section 12-4.02C(3)(j) with:

Add to section 12-4.02C(7):
12-4.02C(7)(a) General
Section 12-4.02C(7)(c) includes specifications for closing traffic lanes, with stationary lane closures on multilane highways. The traffic control system for a lane closure must comply with the details shown.

Traffic control system includes signs.

Each vehicle used to place, maintain, and remove components of a traffic control system on a multilane highway must be equipped with a Type II flashing arrow sign that must be in operation whenever the vehicle is being used for placing, maintaining, or removing the components. Vehicles equipped with a Type II flashing arrow sign not involved in placing, maintaining, or removing the components if operated within a stationary-type lane closure must display only the caution display mode. The sign must be controllable by the operator of the vehicle while the vehicle is in motion. If a flashing arrow sign is required for a lane closure, the flashing arrow sign must be operational before the lane closure is in place.

Whenever components of the traffic control system are displaced or cease to operate or function as specified from any cause, immediately repair the components to the original condition or replace the components and restore the components to the original location.

For a stationary lane closure made only for the work period, remove the components of the traffic control system from the traveled way and shoulder, except for portable delineators placed along open trenches or excavation adjacent to the traveled way at the end of each work period. You may store the components at selected central locations designated by the Engineer within the limits of the highway.

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PHASE II 53 Spec No.2021-179
Add to section 12-4.04:

The Contractor is directed to Chapter 6D, Pedestrian and Worker Safety, in the California MUTCD, the improvement Plans, and these special provisions.

Pedestrians shall be provided with a safe, convenient and accessible path that, at a minimum, replicates the most desirable characteristics of the existing sidewalk, path or footpath and maintains pedestrian access to all businesses.

The Contractor shall construct and maintain temporary pedestrian pathways through the work zone, where required, and to all businesses that shall be in compliance with the requirements of the Americans with Disabilities Act (ADA) and the MUTCD.

Pedestrian routes shall not be impacted for the purposes of any non-construction activities such as parking of vehicles or equipment, or stock piling of materials.

Pedestrians shall not be led into conflicts with work site vehicles, equipment or operations. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
13 WATER POLLUTION CONTROL
Add to section 13-1.01A:

The Contractor shall exercise precaution to limit the muddying or silting of live streams and drainage channels to the maximum extent practicable, and the Contractor's attention is called to the fact that the terms of this contract do not relieve him or her of responsibility for compliance with Sections 5650 and 12015 of the Fish and Game Code or other applicable statutes relating to pollution prevention or abatement.

Add to section 13-3.01A:

The project is risk level 2.

Discharges of stormwater from the project must comply with the permit issued by the North Coast RWQCB for National Pollutant Discharge Elimination System (NPDES) DWQ Construction General Permit, Permit No. 2009-0009. The North Coast RWQCB permit governs stormwater and non-stormwater discharges resulting from construction activities in the project area. The North Coast RWQCB permit may be viewed at 5550 Skylane Blvd., Suite A, Santa Rosa, CA 95403.

Delete "for a risk level 2 or risk level 3 project" and "for a risk level 3 project" at every occurrence in section 13-

3. Whenever a qualifying rain event produces runoff, sampling and analysis work must comply with the Construction Site Monitoring and Reporting Program (CSMRP).

A storm water annual report must cover the preceding period from October 16th to October 15th.

Add to section 13-10.03A:

You may place gravel-filled bags without Type K temporary railing in shoulder areas. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
14 ENVIRONMENTAL STEWARDSHIP
Add to section 14-1.02:

When the Engineer determines that temporary fence (Type ESA) is no longer required, remove and dispose of it under Section 14-10, "Solid Waste Disposal and Recycling," of the Standard Specifications.

Backfill and repair ground disturbance caused by the installation and removal of temporary fence (Type ESA), including holes and depressions, under Section 5-1.36, " Property and Facility Preservation," of the Standard Specifications.

Replace section 14-2.03A with:

Section 14-2.02 applies if archaeological resources are discovered at the job site. Archaeological resources include chipped or ground stone, historic debris, building foundations and human bone. Do not disturb the resources and immediately:

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PHASE II 54 Spec No.2021-179

1. Stop all work within 100 feet of the discovery.

2. Protect the discovery area.

3. Notify the Engineer.

The City of Ukiah will provide a qualified archaeologist to assess the significance of the find and, if necessary, develop appropriate treatment measures in consultation with the City and other appropriate agencies.

Replace section 14-4.01 with:

If human remains of Native American origin are discovered during project construction, it is necessary to comply with state laws relating to the disposition of Native American burials, which fall within the jurisdiction of the Native American Heritage Commission (NAHC) (PRC 5097). If any human remains are discovered or recognized in any location other than a dedicated cemetery, there will be no further excavation or disturbance of the site or any nearby area reasonably suspected to overlie adjacent human remains until:

1. The county coroner has been informed and has determined that no investigation of the cause of death is required; and

2. If the remains are of Native American origin, the descendants of the deceased Native Americans have made a recommendation to the landowner or the person responsible for the excavation work for means of treating or disposing of, with appropriate dignity, the human remains and any associated grave goods as provide in the PRC 5097.98.

Or:

3. The NAHC was unable to identify a decedent, or the descendent failed to make a recommendation within 24 hours after being notified by the commission.

If human remains are discovered during any demolition/construction activities, all ground-disturbing activities within a 330 foot radius of the remains shall be halted immediately, and the Mendocino County coroner shall be notified immediately, according to Section 5097.98 of the state Public Resources Code and Section 7050.5 of California’s Health and Safety Code. If the remains are determined by the County coroner to be Native American, the NAHC shall be notified within 24 hours, and the guidelines of the NAHC shall be adhered to in the treatment and disposition of the remains. The City shall consult with the Most Likely Descendant, if any, identified by the NAHC regarding the treatment and disposition of the remains.

Should paleontological resources be identified at any project construction site, the Contractor shall cease operation within a 330 foot radius of the discovery and immediately notify the City. The City will provide a qualified paleontologist to provide an evaluation of the find and to prescribe mitigation measures to reduce impacts to a less-than-significant level. In considering any suggested mitigation proposed by the paleontologist, the City shall determine whether avoidance is necessary and feasible in light of factors such as the nature of the discovery, project design, costs, land use assumptions, and other considerations. If avoidance is unnecessary or infeasible, other appropriate measures shall be instituted. Work may proceed on other parts of the project site while mitigation for paleontological resources is carried out.

Add to section 14-6.03B:

Construction shall not cause nest abandonment of special-status species of birds or destruction of active nests of species protected by the Migratory Bird Treaty Act or Section 3503 of the California Department of Fish and Wildlife (CDFW) Code (protection of nesting passerines). The following measures shall be implemented to avoid disturbing any special status species nesting above ground. Vegetation removal conducted during the nesting period shall require a pre-construction survey for active bird nests, conducted by a qualified biologist. No known active nests shall be disturbed without a permit or other authorization from the U.S. Fish and Wildlife Service (USFWS) and the CDFW.

1. For earth-disturbing activities occurring during the breeding season (March 1 through September 1), a qualified biologist shall conduct pre-construction surveys of all potential nesting habitat for all birds within 500 feet of earth disturbing activities.

2. If active special status bird nests are found during pre-construction surveys:
a. A 500 foot no-disturbance buffer shall be created around active raptor nests during the breeding season or until it is determined that all young have fledged.

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PHASE II 55 Spec No.2021-179
b. A 250 foot buffer zone will be created around the nests of other special status birds and of all other birds that are protected by CDFW Code 3503. These buffer zones are consistent with CDFW avoidance guidelines; however, they may be modified in coordination with CDFW based on existing conditions at the project site.

3. If preconstruction surveys indicated that nests are inactive or potential habitat is unoccupied during the construction season, no further mitigation is required. Shrubs and trees that have been determined to be occupied by special status birds or that are located 500 feet from active nests may be removed.

4. If vegetation removal activities are delayed or suspended for more than two weeks after the pre-construction survey, the areas shall be resurveyed.

The City of Ukiah will provide a qualified biologist. The Contractor shall coordinate with the City of Ukiah and the biologist and schedule all surveys sufficiently in advance so as to not cause delays in the Work. The Contractor shall anticipate and incorporate such surveys into the construction schedule.

Replace the 2nd paragraph of section 14-8.02 with:

The Contractor’s attention is directed to the provisions of Section 14-8, “Noise and Vibration", of the Standard Specifications and Section 9.08, Saturday, Sunday, Holiday, and Night Work, of the General Conditions concerning the control of noise emissions and authorized work hours and days.

Do not exceed 86 dBA LMax at 50 feet from the job site activities from 7:00 p.m. to 7:00 a.m. except you may operate equipment within the project limits during these hours to:

1. Service traffic control facilities

2. Service construction equipment
The Contractor shall notify all residents within a 500-foot radius of the construction site about the proposed construction schedule. The notification shall be in writing and it shall be developed by the Contractor and submitted to the Engineer for approval a minimum of 5 working days prior to the proposed public notification.

The City shall provide a Noise Disturbance Coordinator who shall be responsible for acting on any local complaints concerning the construction noise being generated by reason of the work of the project. The Contractor shall conspicuously post a telephone number for the Noise Disturbance Coordinator at the construction site and he shall include it in the construction schedule notice to be provided to the residents. The Noise Disturbance Coordinator shall investigate the noise complaint allegations and shall require the Contractor to implement reasonable measures to mitigate the noise level in accordance with these requirements and of the Standard Specifications.

The Contractor shall locate all stationary noise generating construction equipment such as air compressors and generators as far as practical from the nearby residences and other noise sensitive land uses. The noise source shall be acoustically shielded when practical. The Contractor shall prohibit unnecessary idling of internal combustion engines.

Add to section 14-9.02:

The Contractor shall comply with the Mendocino County Air Quality Management District Rules 1-410 and 4-130.

Add to section 14-11.01:

Bidder’s attention is directed to the fact that the proposed project is located in an area that contains no known subsurface petroleum hydrocarbon contamination.

The contractor shall maintain awareness of potential signs of soil and groundwater contamination throughout the project limits and shall notify the City immediately upon discovery. Conditions indicative of contamination may be either visual (staining in soil, sheen on water surface) or olfactory (petroleum hydrocarbon odors.) Upon the discovery of suspected contaminated materials, the Contractor shall immediately provide 40-hour OSHAHAZWOPER certified workers in the contaminated area. The Contractor shall also provide a field Site Safety Officer that is also an 8-hour OSHA-HAZWOPER Supervisor trained to directly oversee the contaminated materials removal and handling operation. All workers in this circumstance must have their initial and annual renewal refresher training, medical clearance and personal protection equipment in accordance with 8CCR Section 5192.

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PHASE II 56 Spec No.2021-179
Soil: None of the excavated material shall be disposed of on the work site. All material excavated from trenches in the project area shall be the property of the Contractor. Prior to disposal of any excess material from the work site, the Contractor shall submit to the Engineer written authorization for such disposal and entry permission signed by the approved disposal site. Contractor shall comply with all disposal regulations such as City, County, and/or State permits and license, as may be required.

Water: Groundwater may be encountered during the course of excavation. If it is encountered, the Contractor shall immediately notify the City. The Contractor shall remove all water which accumulates in the excavation during the progress of work until the pipe or other structures are installed and until backfilling has progressed to a sufficient height to anchor the work against possible flotation or leakage. At all times, the Contractor shall have a minimum of 2 working pumps available for immediate use at all times.

Water accumulated in excavations shall be discharged to the sanitary sewer under the supervision of City staff. Said water shall be disposed of in a manner as to cause no injury to public or private property, or be a menace to public health. Sediment shall be removed from any water to be disposed of, prior to discharge, by placing the pump inlet hose into a sump filled with clean gravel, or a perforated bucket filled with clean gravel. The outlet of the pump shall have a filter sock installed to retain residual sediment.

If any odor, sheen or other visual discrepancy is noted during excavation or discharge, stop pumping and immediately notify the Engineer. Pumped groundwater will not be allowed into any watercourse or storm drain system.

Contractor shall be responsible for constructing, operating and maintaining all necessary features to complete the work including furnishing, installing and maintaining all pumping and other equipment required to dewater any trenches containing water as may be encountered during performance of the work. Dewatering plan for each occurrence shall be approved by the Engineer prior to implementation. At the permanent conclusion of dewatering operations, all dewatering equipment shall be removed from the job site.

Add to section 14-11.08E:

Dust control shall conform to the provisions of Section 14-11.08E and Section 18 of the Standard Specifications.

In accordance with the recommendations contained in the certified Project EIR, all active construction areas shall be watered at least twice daily and more often during hot or windy periods. The active areas adjacent to businesses and residential areas shall be kept damp at all times. Hauling trucks shall be covered or at least a two-foot freeboard shall be maintained.

Unpaved access roads, parking areas for construction equipment and construction employee vehicles, staging areas, and storage areas shall be paved with hot mix asphalt or have a stabilized access in accordance with the Plans and referenced details. Unpaved construction staging areas shall receive the application of either water twice daily or non-toxic soil stabilizers. All paved access roads, parking areas, staging areas, storage areas, and public roads impacted by the work of the project shall be swept daily with street sweepers equipped with water spray to remove soil materials that have been deposited on these surfaces by reason of the work.

The Contractor shall enclose, cover, or water twice daily or apply non-toxic soil stabilizers or install erosion control blankets to or on exposed stockpiles, embankment slopes, and cut slopes.

Traffic speeds on unpaved surfaces shall be limited to a maximum speed of 15 mph.

Add after the 2nd paragraph of section 14-11.12A:

This project includes removal of yellow thermoplastic that will produce hazardous waste residue.

Add after the 1st paragraph of 14-11.12E:

After the Engineer accepts the analytical test results, dispose of yellow thermoplastic and yellow paint hazardous waste residue at a Class 1 disposal facility located in California within 60 days after accumulating 220 lb of residue.

If less than 220 lb of hazardous waste residue and dust is generated in total, dispose of it within 30 days after the start of accumulation of the residue.

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15 EXISTING FACILITIES
Add to section 15-1.03A:

All known obstructions to the work are indicated on the plans. However, the City cannot guarantee the accuracy of this information. The Contractor will be held responsible for the maintenance and protection of or damage to existing facilities, structures, obstructions and all underground facilities shown on the Plans or brought to the Contractor's attention during the course of the work.

The Contractor shall notify owner agencies for locations of utilities or facilities prior to excavation.

The owning utility shall be immediately notified of any damage which is caused by the operations of the Contractor to any facility, utility or structure. At the owning utility's discretion, repairs shall be made by the Contractor at the owning utility's direction or by the utility, all to the satisfaction of the Engineer.

All pothole work to expose existing utilities shall be done by vacuum excavation methods. The preferred method of excavation shall be by high pressure air. Use of water fluid for excavation shall only be by permission of the City Engineer.

Maximum dimension of the pothole shall be 12 inches by 12 inches. All excavation material shall be removed and disposed of by the contractor. Backfill material shall be Class 2 aggregate base compacted to 90% relative compaction. Prior to paving, the pothole shall be cut to provide a clean vertical edge to pave against. The final dimension of the pothole prior to paving shall be 12 inches by 12 inches maximum. The asphalt concrete shall be a ½ inch mix having a depth of 4 inches.

All pothole work shall comply with the Traffic Control provisions of Standard Specifications and these special provisions.

Water and sewer assets including pipework, sewer manholes, valve boxes, hydrants and surface features including concrete sidewalk, curb ramp, shoulder and curb and gutter as well as other miscellaneous items designated on the Plans to be removed shall be removed by the Contractor. The Contractor shall dispose of all Asbestos Cement Pipe (ACP) in accordance with the Contractor’s State Licensing Law and all applicable laws and regulations. The Contractor shall dispose of all Portland cement concrete and asphalt concrete generated from removal or demolition activities on the project at a recycler for these materials. The Contractor shall provide receipts verifying delivery and approximate quantities (in tons) of the material delivered to a material recycler. All other excess materials from the project shall become the property of the Contractor and shall be disposed of by him at his expense.

Add to section 15-1.03B:

Concrete sidewalk, curb ramp, shoulder and curb and gutter designated on the Plans to be removed shall be removed by the Contractor. The Contractor shall dispose of all Portland cement concrete and asphalt concrete generated from removal or demolition activities on the project at a recycler for these materials. The Contractor shall provide receipts verifying delivery and approximate quantities (in tons) of the material delivered to a material recycler. All other excess materials from the project shall become the property of the Contractor and shall be disposed of by him at his expense.

All portions of existing concrete to be removed shall be removed in a smooth, neat, vertical plane. Where expansion, contraction or construction joints are not present, the concrete shall be saw cut to a minimum depth of 1-1/2 inches. If an expansion, contraction or construction joint is within 3 feet of the concrete to be removed, the concrete shall be removed to that joint.

Prior to final paving, all portions of existing pavement to be removed shall be cut on a neat, straight line. Pavement removed outside the removal line shall be cut parallel to and at right angles to the removal line. The face of the cut shall be smooth and shall not overhang the removal area. Drop hammers are not allowed. Jackhammers may be used if the cuts are overlapped and meet the above criteria. Where edges of remaining pavement are raised by the removal method used, they shall be flattened with a mechanical tamper prior to setting frames or replacing pavement.

Where an excavation leaves less than 2 feet of pavement adjacent to the gutter, the remaining pavement shall be removed and replaced.

All removed material, unless otherwise specified, shall become the property of the Contractor and shall be disposed of outside of the right-of-way.

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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
16 TEMPORARY FACILITIES
No Changes.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION III EARTHWORK AND LANDSCAPE
17 GENERAL
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Add to section 17-2.03A:

This work shall consist of removing all objectionable material within the limits shown on the Plans and as directed by the Engineer. Clearing and grubbing shall be performed in advance of grading operations and in accordance with the requirements of these Special Provisions.

Special care shall be taken by the Contractor to protect adjacent property, improvements, utilities facilities, lawns, landscape features and landscape irrigation and shrubbery from damage. Any such objects or improvements so damaged shall be replaced or restored in kind by the Contractor, at his own expense, to the satisfaction of the Engineer.

All existing street designation and traffic control signs and posts within the limits of work shall be carefully removed, cleaned of excess earth and debris, and delivered to the City, except those that are required for traffic control as determined by the Engineer or as shown on the Plans to be relocated.

The area to be cleared and grubbed shall be the area shown on the Plans, unless otherwise specified.

All stumps, large roots, and other objectionable materials shall be removed to a depth of 3 feet below finished grade in the area between curbs, and to a depth of 12 inches below finished grade in the area between curb and public utility easement line. The resulting spaces shall be backfilled with suitable fill material placed and compacted in accordance with the applicable provisions of Section 19-6.03 of the Standard Specifications.

Add to section 17-2.03B:

The locations of trees planned for removal are shown on the Plans.

The Engineer shall be contacted a minimum of 48 hours prior to any tree removal to perform an on-site inspection and clearance. Trees shall be removed in a manner satisfactory to the Engineer.

Tree roots that are identified on the Plans to be removed that are in conflict with new facilities shall be removed in their entirety or to provide the minimum clearances to new facilities as indicated below, regardless of root diameter. No separate compensation will be paid for removing roots identified on the Plans.

Where tree roots that are not identified on the Plans to be removed interfere with the construction or reconstruction of curb, gutter, sidewalk, pavement, utilities, other facilities, the Contractor shall excavate and expose the roots for inspection by the Engineer. Upon approval from the Engineer, the Contractor shall remove tree roots which are four (4) inches or less in diameter to provide a minimum clearance of six inches to any new facility. No separate compensation will be paid for removing roots not identified on the Plans.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
18 DUST PALLIATIVE
Add to section 18-1.01A:

The application of water and the developing of a water supply shall be performed in accordance with the provisions of Section 18, “Dust Palliative,” of the Standard Specifications except as modified by these Special Provisions.

The Contractor is advised that water may be obtained from fire hydrants within the project area under permit with the City’s Public Utilities Department and upon the payment of a meter deposit. Permit application and inquiry as to the water usage fees are to be made at Public Utilities Department-Water Division Building within the City’s Corporation Yard located at 1320 Airport Road, (707) 463-6200.

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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
19 EARTHWORK
Add to section 19-1.03B:

Unsuitable material shall be removed and replaced in accordance with the provisions of Section 19-1.03 of the Standard Specifications and these Special Provisions. Material below the natural ground surface in embankment areas, and basement material below the grading plane in excavation areas that is determined by the Engineer to be unsuitable for the planned use shall be excavated and disposed of as directed or approved by the Engineer.

When unsuitable material is removed and disposed of, the resulting space shall be filled with material suitable for the planned use. Such suitable material shall be placed and compacted in layers as hereinafter specified for constructing embankments.

Removal of existing bituminous pavement and base materials will be paid for as “Roadway Excavation” for the quantities involved and no additional allowance will be made therefor.

Existing utilities exposed during subgrade excavation shall be immediately brought to the attention of the Engineer.

Excess materials from the excavation shall become the property of the Contractor and shall be disposed of by the Contractor at the Contractor’s expense.

In the event that the subgrade material is unstable and cannot be made stable by drying the top six inches as determined by the Engineer then the Contractor shall excavate an additional 12 inches, install subgrade enhancement geotextile and install 12 inches of Class 2 aggregate base.

Subgrade enhancement geotextile shall be installed in accordance with the provisions of Section 19-8 of the Standard Specifications.

Prior to the placement of subgrade enhancement geotextile, the Contractor shall remove all loose dirt as left from excavation activities, scarify the subgrade a minimum depth of 6 inches, and compact to 95% relative compaction.

Subgrade enhancement geotextile shall be Class B1 per Section 96-1.02O of the Standard Specifications.

Add to section 19-2.01A:

Roadway excavation shall include all excavation, grading, bioretention area excavation, landscape and tree excavation and fill, subgrade preparation, disposal of excess material, and all other work as specified herein.

Add to section 19-2.03A:

The exposed subgrade surface shall be reviewed by the Geotechnical Engineer to confirm it is ready to receive improvements. Following Geotechnical Engineer review, the existing subgrade material below the new aggregate base shall be scarified to a depth of 6 inches, moisture conditioned to within 2 percent of optimum moisture content, and compacted to a minimum of 95 percent relative compaction.

Add to section 19-7.02C:

Imported borrow shall have a minimum Resistance Value (R-Value) of 20, rock particles no larger than 3 inches, and with 100% passing a 6-inch sieve, 85% minimum passing a 2.5-inch sieve, 30% minimum passing a No. 200 sieve.

Atterberg limits: Plastic Limit PI < 20, Liquid Limit < 40. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
20 LANDSCAPE
Replace the 3rd paragraph of section 20-2.01A(4)(b)(i) with:

Perform pressure testing using Method B to test supply lines (1) located on the discharge side of the valve, (2) installed by trenching and backfilling, or (3) completely visible after installation.

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PHASE II 60 Spec No.2021-179
Replace section 20-2.01B(6) with:

Unions must be injection molded PVC, schedule 80.

Replace the 1st and 2nd paragraph of section 20-2.01B(7) with:

Valve boxes must be HDPE with T-Cover bolt down lids, color Black.

Replace item 1. in the 1st paragraph of section 20-2.02B(1) with:

Backflow preventer including brass ball valves, brass unions, fittings and supports.

Add to section 20-2.02B(3):

The color of the backflow preventer blanket must be green.

Add to section 20-2.05B:

Flow sensor cable must be rated 600V and 194 degree F, be UL listed as Type TC, comply with specifications of ICEA/NEMA and:

1. Consist of 2 no. 16 minimum stranded copper conductors. Insulated conductor must be color coded with a PVC or nylon jacket.

2. Include a tinned cooper braid or aluminized polyester film shield. Where the film is used, a no. 18 or larger, stranded or no. 16 solid, tinned, copper drain wire must be placed between the insulated conductors and the shield and in contact with the conductive surface of the shield.

3. Include a black PVC jacket with a minimum nominal thickness of either 50 mils or 48 mils where capacitance of conductors to other conductors and the shield is 87 pF/ft or better. The cable jacket must be marked with the insulation type designation, conductor size, and voltage and temperature ratings.

4. Have an outside diameter of 0.19 to 0.20 inch.

5. Be UV resistant and direct burial type.

Replace the 1st paragraph of section 20-2.10B(2) with:

Each ball valve must be injection molded PVC, schedule 80.

Replace the section 20-2.10B(4) 2.1.1 with:

Can withstand a working pressure of 120 PSI.

Replace item 2 in the list in the 1st paragraph of section 20-2.10B(10)(a) with:

2. Be glass-filled nylon.
add item 12 in the list in the 1st paragraph of section 20-2.10B(10)(a) with:

2. Each valve requires a decoder for communication with controller.

Add to section 20-10.02C(4):

An existing irrigation system is present within the project area. Remove all irrigation facilities when encountered during the course of the Work and in excavations. Remove and dispose of irrigation controller, backflow preventer, water meter, enclosure, foundation and related irrigation facilities. Plug abandoned irrigation pipes with concrete at the exposed limits of excavations prior to backfilling,
Replace section 20-3 with:
20-3.01 GENERAL
20-3.01A General Conditions
Drawings and General Provisions of the Contract, including General and Supplementary Conditions shall apply to all Work in this Section with the same force and effect as though repeated in full herein.

Site shall be free of weeds, native grasses, Bermuda grass, and Kikuyu grass prior to any planting or soil amendment placement.

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PHASE II 61 Spec No.2021-179
All rock and other growth or debris accumulated throughout the duration of the project shall be removed from the Project Site by the Contractor.

Prior to excavation for planting or placing of plant materials, the Contractor shall locate all underground utility lines still in use and take proper precautions to avoid damage to such improvements. In the event of a conflict between such lines and plant material locations, the Contractor shall notify the Engineer who shall arrange for the relocation of one or the other. The Contractor assumes all responsibility for making any or all repairs for damages resulting from Work as specified herein.

Grading and soil preparation work shall be performed only during the period when beneficial and optimum results may be obtained. If the moisture content of the soil should reach such a level that working it would destroy soil structure or cause compaction, spreading and grading operations shall be suspended until, in the opinion of the Engineer, the moisture content is increased or reduced to acceptable levels and the desired results are likely to be obtained.

Contractor shall coordinate all drainage work with the other trades. Established site drainage shall be maintained by the Contractor during all phases of landscape construction.

Grade all areas by filling and/or removing surplus soil as needed to ensure proper grades and drainage as indicated on the plans. Unless otherwise noted, soil finish grades shall be below hardscape areas as follows:

Two inches (2”) for all planting areas without decomposed granite.

All undulations and irregularities in the planting surfaces resulting from tillage, rototilling, and all other operations, and all ridges and rises which are visually evident and would affect the maintenance of any planting area, shall be leveled and floated out before planting operations are initiated.

Final finish grades shall insure positive drainage of the Project Site with all surface drainage away from buildings, walls, and toward driveways, drain inlets, and catch basins.

Final grades shall be acceptable to the Engineer before planting operations will be allowed to commence.

The above conditions shall also apply to the final finish grade at the time of project completion.

Actual planting shall be performed during those periods when weather and soil conditions are suitable in accordance with locally-accepted horticultural practice as approved by the Engineer.

All scaled dimensions are approximate. Before proceeding with any Work, the Contractor shall carefully check and verify all dimensions and shall immediately notify the Engineer of any discrepancy between the Contract Drawings and/or Contract Specifications and the actual Project Site conditions.

Quantities of plant materials are shown for the Contractor’s convenience only and are not guaranteed. The Contractor shall check and verify count and shall furnish a sufficient number of plant materials as needed to fulfill the intent and complete the Work as shown in the Contract Drawings. Plan plant symbol quantities shall take precedence over quantities indicated in the Plant List and Plan callouts.

Contractor shall make arrangements to have a complete set of Contract Drawings and Contract Specifications at the Project Site at all times during Work under this Section.

As-Built Plans shall be prepared by the Contractor indicating any deviations in Work described herein and on the Contract Drawings, with respect to changes in materials, plant species, sizes, locations, and alignments. As-Built Plans shall be prepared by marking the changes on a conformed set of diazo prints in red ink. Provide As-Built Plans to the Engineer at the end of the contracted Maintenance Period. 20-3.01A(1) Summary
This Section includes all materials, labor, transportation, services, and equipment necessary to install landscape planting and landscape construction items as shown on the Contract Drawings, and as specified herein this Section.

This Section includes the following Scope of Work:

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PHASE II 62 Spec No.2021-179
Fine Grading
Soil Preparation
Pre-Planting Weed Control
Tree, Shrub and Groundcover planting
Staking and Tying
Planting Soil
Import Rain-garden Soil
Soil Conditioners, Amendments, and Fertilizers
Mulches (wood products, aggregates)
Decorative Stone
20-3.01A(2)(a) Definitions
“Engineer” in this Section shall refer to the Agent designated by the City of Mill Valley.

Acceptance: Wherever the terms “acceptance”, “approved”, “acceptable” or “directed” are used herein, they mean acceptance by the Engineer in writing.

Plant Material(s) refers to all living plants, inclusive of trees, palms, shrubs, groundcovers, vines, turf, and grasses.

Planting Area (P.A.) as indicated on the Contract Drawings, shall mean all areas to be installed with plant material(s), or as areas where existing trees and/or vegetation shall be protected.

ASTM – American Society for Testing Materials.

USDA – United States Department of Agriculture.

ANSI – American National Standards Institute.

Plant Height: Measurement of main body height, not measurement to branch tip.

Plant Spread: Measurement of main body diameter, not measurement from branch tip to branch tip.

Finish Grade: Elevation of finished surface of planting soil.

Topsoil: Naturally occurring soil from the A horizon (top layer).

Planting Soil: Topsoil which has been amended to meet the specification for planting soil in this section. Import soil that meets the specification for planting soil in this section. Planting soil may also be referred to as Manufactured Topsoil.

Subsoil: Native soil below topsoil, native soil remaining after construction excavation or fill or backfill material in place after completion of excavation and rough grading, before placement of planting soil.

Bioretention: A planting area that will be receive stormwater runoff. Per the plans, these planters have a unique plant palette, boulders, and a soil mixture with a higher percolation rate in addition to regular planting soil. Planter: Isolated area of planting soil for trees, shrubs, and groundcover. May be raised and or partially surrounded by concrete sidewalk. 20-3.01A(2)(b) Reference Standards
All plant material shall be true to botanical and common name as indicated in the following:

Sunset Western Garden Book, Sunset Publishing Corporation, 2001.

American Standard for Nursery Stock, ANSI Z60.1-1966, edition approved November 6, 1996, American Association of Nurserymen, and American National Standards Institute.

All plant material shall conform to the California State Department of Agriculture’s regulations for nursery inspections, rules, and ratings.

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20-3.01A(3) Submittals
Submit each item in this Article according to the Conditions of the Contract and this Specification Section.

Contractor shall submit no later than thirty (30) days after award of Contract, four (4) bound booklets. Each booklet under this Section shall be tabbed into specific sections, containing clearly identified (through yellow highlighter or other identification methods) and legible information on the following landscape information indicated in this Article:

Product certificates, legible, signed by manufacturer, certifying that their products comply with specified requirements. Certificates shall include grades, analysis, amount, supplier, species, type, size, and quantity where applicable.

Manufacturer's certified analysis for standard products.

Analysis for other materials by a recognized laboratory made according to methods established by the Association of Official Analytical Chemists, where applicable.

Label data substantiating that plants, trees, shrubs, and planting materials comply with specified requirements.

Soil amendment receipts containing analytical data.

Receipts from the soil supplier of all soil mixes specified in this Section.

Soil analysis and testing for soil fertility with recommendations and percolation tests by independent laboratory.

List of all proposed landscape materials indicated by description, manufacturer, and model number. Include catalog cuts and manufacturer’s current printed instructions of all material items described herein this Section.

List of all trees, shrubs and ground covers, indicated by botanical name, common name, height, spread, caliper, container size, nursery, and location, contact person at nursery, and any specific remarks (i.e. “unable to locate”, “photo submitted”, etc.)
Color photographs of each tree type. Include a person or tape measurer in each photograph for scale purposes. Digital photographs may be acceptable or preferred. Approval of photographs does not indicate acceptance of plant material on site.

Planting schedule, indicating anticipated dates and locations for each type of planting.

The Contractor shall submit no later than thirty (30) days after the award of Contract the following two (2) sets of physical samples sent to the Engineer in resealable, labeled plastic bags (as applicable):

One (1) tree tie and/or tree guy of each type used.
½ cubic foot each of landscape mulch materials, i.e. shredded bark mulch, aggregate, etc. ½ cubic foot of planting soil.
½ cubic foot of import bioswale soil.

Qualification data for firms and persons specified in the "Quality Assurance" Article to demonstrate their capabilities and experience. Include lists of completed projects with project names and addresses, names and address of architects and owners, and other information specified.

Soils Analyses and Testing: Contractor shall submit agronomic analyses of existing soil if proposed to be used as planting soil, import soil if proposed to be used as planting soil, and raingarden soil as follows. Analyses shall be performed by independent testing agency.

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Stockpiled Existing Soil and Import Soil before placement: Analysis of existing soil prior to application of amendment indicating soluble salts, pH, texture, and organic matter content. Analysis shall state recommended amendments and procedures required to create planting soil that meets this specification. Amendment recommendations shall prioritize use of Organic Compost and other organic amendments as needed. Analysis shall describe any other topsoil qualities which may be detrimental to plant growth and health. Provide one test per source.

Planting Soil after placement and amendment: Immediately following site fine grading (placement, integration, and grading of planting soil) and prior to commencing landscape planting, Contractor shall provide horticultural soils fertility test and percolation test results to the Engineer to verify that installed planting soil meets specifications. Provide (5) samples at the locations designated by the Engineer. 20-3.01A(4) Quality Assurance
Installer Qualifications for all items indicated herein this Section: Licensed Landscape Contractor, C-27, in the State of California.

Engage an experienced, licensed Contractor who has completed landscaping work similar in material, design, and extent to that indicated for this Project and with a record of successful landscape establishment.

Installer's Field Supervision: Contractor shall maintain an experienced, full-time landscape supervisor/superintendent at the Project Site during times that landscaping operations identified herein the Contract are in progress.

Superintendent shall be fluent in English and satisfactory to the Engineer. Superintendent shall not be changed except with the consent of the Engineer and shall be authorized to represent the Contractor.

Testing Agency Qualifications: To qualify for acceptance, an independent testing agency must demonstrate to Engineer's satisfaction, based on evaluation of agency-submitted criteria conforming to ASTM E 699, that it has the experience and capability to satisfactorily conduct the testing indicated without delaying the Work.

Provide quality, size, genus, species, and variety of trees and shrubs indicated, complying with applicable requirements of ANSI Z60.1 "American Standard for Nursery Stock."
Selection of trees and shrubs purchased under allowances will be made by Engineer, who has the option to tag stock at their place of growth before the plant material is prepared for transplanting.

At least one (1) plant of each species delivered to the project site shall have an identification tag from supplying nursery showing botanical and common name of plant.

Measurements: Measure trees and shrubs according to ANSI Z60.1 with branches and trunks or canes in their normal position. Do not prune to obtain required sizes.

Take caliper measurements six inches (6”) above ground for trees up to four-inch (4”) size, and twelve inches (12”) above ground for larger sizes.

Prior to installation of any items presented within this Measure main body of tree or shrub for height and spread; do not measure branches or roots tip-to-tip.

Pre-Installation Conference: Section or as indicated on the Contract Drawings, the Contractor shall conduct a PreInstallation Conference at the Project Site.

Meeting minutes from the conference shall be the responsibility of the Contractor and shall be distributed to all parties in attendance for review and subsequent approval of the conference discussion items.

Regulatory Requirements: Contractor shall meet the requirements of applicable laws, codes, and regulations as required by the authorities having jurisdiction over the Work.

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Manufacturer’s Directions: Follow manufacturer’s directions and drawings in all cases where the manufacturer’\s of articles used in this Section furnish directions covering points not shown in the Contract Drawings and Contract Specifications.

Permits, Fees, Bonds, and Inspections: The Contractor shall arrange and pay for any and all permits, fees, bonds, and inspections necessary to perform and complete his portion of the Work.

Contract Drawings and Contract Specifications:

Comply with the intent and meaning of Contract Drawings and Contract Specifications taken as a whole, not taking advantage of any readily perceived error or omission shall any exist.

Figures and dimensions on Contract Drawings shall take precedence over measurements by scale, and detailed drawings shall take precedence over general drawings.

Refer any errors and discrepancies in or between plans, specifications, lists, or notes to the Engineer for adjustments or clarification before proceeding with the Work. In the event of errors or discrepancies, the Contractor shall assume responsibility for work performed without referring to the Engineer for clarification.

The Engineer shall interpret the meaning of the Contract Drawings and Contract Specifications in the event of conflict, and his/her decision shall be final.
20-3.01A(5) Delivery, Storage and Handling
Packaged Materials: Deliver packaged materials in containers showing weight, analysis, and name of manufacturer.

Protect materials from deterioration during delivery and while stored at site.

Anti-Dessicant: Spray plant materials in full leaf immediately before transporting with anti-dessicant. Meet requirements of anti-dessicant manufacturer’s current printed application instructions.

Trees and Shrubs: Do not prune before delivery. Protect bark, branches, and root systems from sun scald, drying, sweating, whipping, and other handling and tying damage. Do not bend or bind-tie trees or shrubs in such a manner as to destroy natural shape. Provide protective covering during delivery.

Handling Plant Materials
Handle plant materials grown in containers only by their containers.

DO NOT handle plant materials by their trunks or stems.

DO NOT drop any plant materials.

DO NOT bind or handle plants with wire or rope.

Pad trunk and branches whenever using hoisting cables, chains, or straps.

Should the Contractor engage in handling any of the plant material(s) by any unacceptable method(s), then the Engineer shall reserve the right to reject any of the mishandled plant material(s). The Contractor shall replace all rejected plant material(s) with approved plant material(s) at no additional cost to the Owner.

Deliver trees, shrubs, ground covers, and plants after preparations for planting have been completed and install immediately. If planting is delayed more than six (6) hours after delivery, set planting materials in shade, protect from weather and mechanical damage, and keep roots moist. Anchor plants to prevent damage from winds.

DO NOT remove container-grown stock from containers before time of planting.

Water root systems of trees and shrubs stored on site with a fine-mist spray. Water as often as necessary to maintain root systems in a moist condition.
20-3.01A(6) Project Conditions
Utilities: Determine location of above grade and underground utilities and perform Work in a manner which will avoid damage. Hand excavate, as required. Maintain grade stakes until removal is mutually agreed upon by parties concerned.

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Excavation: When conditions detrimental to plant growth are encountered, such as rubble fill, adverse drainage conditions, or obstructions, cease planting operations and notify Engineer for further direction.

Installation: Perform planting operations only when weather and soil conditions are suitable in accordance with locally accepted practices.
20-3.01A(7) Coordination, Scheduling, and Observation
Coordinate installation of planting materials during normal planting seasons for each type of plant material required.

Coordinate with other trades on Project Site.
20-3.01A(7)(a) Permits
Contractor shall be responsible for obtaining all permits necessary to complete and install Work as specified herein. 20-3.01A(7)(b) Observation
Site observation for Scope of Work specified herein this Section shall be made by the Engineer. The Contractor shall request, in writing, at least one (1) week in advance of the time that observation is required. The Contractor and Engineer shall be in attendance at the Project Site at the time of each scheduled observation. Observation shall be required for the following Scope of Work:

Pre-Construction Meeting.

Placing of planting soil after rough grading and incorporation of planting soil into top layer of sub-soil as described in this section.

Upon completion of fine grading operations and prior to planting operations, verification of finish grades.

Inspection and approval of plant material.

Spotting trees prior to excavation of planting holes.

Placement of gravel mulch and stones.

Tree staking/guying.
20-3.01A(7)(c) Punch List Preparation
When planting and all other Work as specified in the Contract Drawings and Specifications is 100% complete and ready for Punch List Preparation, the Contractor shall seek acceptance of the installed Work by requesting an on-site visual inspection by the Engineer.

A “Punch List Preparation Request” shall be addressed to the Engineer, requesting a time and date for generating the Punch List Preparation:

Contractor shall provide written notification requesting the presence of the Engineer at least one (1) week prior to the scheduled date of the Punch List Preparation.

The Punch List Preparation Request shall be in the form of a letter, dated and signed by the Contractor, on letterhead.

The letter shall state as follows: “Work installed within Scope of Work identified on the Contract Drawings and Contract Specifications, prepared by the Landscape Architect, is 100% complete and ready for Punch List Preparation at the Project Site by the Engineer.”
Should the Contractor’s Work as installed at the Project Site is found to be incomplete during the Punch List Preparation (at the discretion of the Engineer upon observation at the Project Site), then the Engineer shall reserve the right to postpone the Punch List Preparation until a time when the Contractor fully executes and completes the Work as identified on the Contract Drawings and Specifications.

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Should the Punch List Preparation be postponed due to the incomplete Work, then the Engineer reserves the right to charge the Contractor for the Engineer’s time on an hourly basis, at the Engineer’s current standard billing rate, plus expenses.

Should the Contractor be charged for time as indicated herein this Article, the Engineer reserves the right to withhold final approval of the Project until the Contractor provides full compensation to the Engineer accordingly.

Punch List Field Verification & Pre-Maintenance Review:

Following the Punch List Preparation, the Contractor shall request an on-site visual observation by the Engineer to verify completion of outstanding items identified in the Punch List for acceptance of the installed Work and subsequent commencement of the Maintenance Period.

A “Punch List Field Verification Request” shall be addressed to the Engineer, requesting a time and date for field review of the items identified in the Punch List Preparation.

Contractor shall provide written notification requesting the presence of the Engineer at least one (1) week prior to the scheduled date of the Punch List Field Verification.

The Punch List Field Verification Request shall be in the form of a letter, dated and signed by the Contractor, on letterhead.

The letter shall state as follows: “Work installed within Scope of Work identified on the Contract Drawings and Contract Specifications, prepared by the Landscape Architect, is 100% complete and ready for Punch List Field Verification Review at the Project Site by the Owner and Engineer.” Should the Contractor’s Work as installed at the Project Site is found to be incomplete during the Punch List Field Verification (at the discretion of the Engineer upon observation at the Project Site), then the Engineer shall reserve the right to postpone the Punch List Field Verification until an time when the Contractor fully executes the Work identified in the Punch List Preparation.

Should the Punch List Field Verification be postponed due to the incomplete Work, then the Engineer reserves the right to charge the Contractor for the Engineer’s time on an hourly basis, at the Engineer’s current standard billing rate, plus expenses.

Should the Contractor be charged for time as indicated herein this Article, the Engineer reserves the right to withhold final approval of the Project until the Contractor provides full compensation to the Engineer accordingly.

Observation and subsequent written acceptance shall establish “Substantial Completion”, and marks the commencement date of the Maintenance Period. Duration of the Maintenance Period shall be as specified herein this Section. This is not a final observation nor final acceptance of Work, and it does not relieve the Contractor from any of the responsibilities in the Contract Drawings and Contract Specifications for the Project. 20-3.01A(7)(d) Final Review
Following the completion of the scheduled Maintenance Period as indicated in Section Landscape Maintenance and Plant Establishment, the Contractor shall request a Final Review by the Owner and Engineer to verify, through on-site visual observation, the completion of Work as indicated in the Contract Drawings and Contract Specifications, and final acceptance of the installed Work.

A “Final Review Request” shall be addressed to the Owner and Engineer, requesting a time and date for final field review of the completed Work
Contractor shall provide written notification requesting the presence of the Owner and Engineer at least one (1) week prior to the scheduled date of the Final Review.

The Final Review Request shall be in the form of a letter, dated and signed by the Contractor, on letterhead.

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The letter shall state as follows: “Work installed within Scope of Work identified on the Contract Drawings and Contract Specifications, prepared by the Landscape Architect, is 100% complete and ready Final Review at the Project Site by the Owner and Engineer.”
Should the Contractor’s Work as installed at the Project Site is found to be incomplete during the Final Review (at the discretion of the Engineer upon observation at the Project Site), then the Engineer shall reserve the right to postpone the Final Review until an time when the Contractor fully executes the Work.

Should the Final Review be postponed due to the incomplete Work, then the Engineer reserves the right to charge the Contractor for the Engineer’s time on an hourly basis, at the Engineer’s current standard billing rate, plus expenses.

Should the Contractor be charged for time as indicated herein this Article, the Engineer reserves the right to withhold final approval of the Project until the Contractor provides full compensation to the Engineer accordingly. 20-3.01A(8) Guarantee
Guarantee: Contractor shall guarantee installed landscape as outlined in Section 20-4 “Plant Establishment”. 20-3.01A(9) Maintenance
Maintenance: Contractor shall maintain installed landscape as outlined in Section 20-4 “Plant Establishment”. 20-3.01A(10) Samples and Tests
The Engineer reserves the right to take and analyze selected samples of plant material and/or products for conformity to the requirements as outlined in this Section at any time from the Project Site. Rejected plant materials and/or products shall be immediately removed from the Project Site by the Contractor at no cost to the Owner.

Laboratory soil tests are described in other sections.
20-3.01A(11) Substitutions
Specific reference to manufacturer’s names and products specified herein are used as standards of quality. This implies no right to the Contractor to substitute other materials without prior written approval by the Engineer for Work under this Section.

Any materials substituted and installed by the Contractor, without written approval by the Engineer may be rejected.

Contractor shall not be entitled to be compensated by the Owner where the Contractor has installed rejected substitutions without receiving prior written approval.

Proposed substitutions shall be explicitly identified in the submittal documentation. Approval of a submittal package that contains multiple products or materials without explicit approval of a substitution does not imply approval of the substitution.

If an approval is granted for a substitution, adjustment in the Contract amount shall be made in accordance with the Contract Conditions.
20-3.01B MATERIALS
20-3.01B(1) General
Immediately upon award of Contract for Work, the Contractor shall locate and purchase or hold for purchase all plant material as required. Trees may be purchased and contract grown to ensure pruning practices are met.

Contractor shall verify with Engineer of any plant material stock that has been nursery contract grown by Owner for use within Work of this Contract.

Contractor shall review the condition of the plant material with the Engineer at the nursery maintaining the plant material, and at the time of delivery at the Project Site.

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All plants shall have a growth habit typical for variety and species, symmetrical, with tightly knit branching, so trained or favored in development and appearance as to be superior in form, number of branches, compactness and symmetry, healthy, vigorous in growth. Plant materials shall also be free from insect pests, eggs and larvae, plant diseases, sun scalds, fresh bark abrasions, excessive abrasions, windburn, saltburn, or other objectable disfigurements or conditions as determined by the Engineer.

Container stock shall be grown in containers in which delivered for at least six (6) months, but not over two (2) years.

Pruning of trees as grown at the nursery shall meet the requirements outlined by the International Society of Arboriculture’s “Tree Pruning Standards.”
Leaders of trees shall not have been pruned by the nursery. It is the contractor’s responsibility to ensure these specifications are met regardless of practices by nurseries.

All plant material shall be subject per the California State Department of Agriculture Regulations for Nursery Inspections of Rules and Grading. Quantity and size of all plant shall be No. 1 Grade of Pinto Tag stock, or equal. Pinto tags shall be submitted to the Engineer upon delivery of the plant material to the Project Site.

All plant material shall have normal, well-developed branch systems, and vigorous, fibrous root systems, which are neither root- nor pot-bound, and are free of kinked, gnarled, or girdling roots. 20-3.01B(2) Plant Material
20-3.01B(2)(a) General
Furnish nursery-grown trees and shrubs conforming to ANSI Z60.1, with healthy root systems developed by transplanting or root pruning. Provide well-shaped, fully branched, proportional, healthy, vigorous stock free of disease, insects, eggs, larvae, and defects such as knots, sunscald, injuries, abrasions, and disfigurement. All trees shall be heavy caliper specimens, devoid of wounds, scars, or uncharacteristic blemishes on their trunks. Refer to the Plant List on the Contract Drawings for the specified plant material species, varieties, types, sizes, forms, and minimum required heights, spreads, calipers, and other requirements.

Grade: Provide plant material of sizes and grades conforming to ANSI Z60.1 for type of plant material required. Plant material of a larger size may be used if acceptable to the Engineer, with a proportionate increase in size of roots or balls.

Label each plant material of each variety with a securely attached, waterproof tag bearing legible designation of botanical and common name.

Plant Material shall have grown in boxed or containers for sufficient time to permit full rooting within the specified container to bind the planting soil, but not so long as to create a “rootbound” condition. No boxed or container plant material shall be planted which have cracked or broken balls of earth when separated from their boxes or containers.

No plant material shall be planted with damaged roots, broken root balls, or which are found to be “rootbound” when separated from their containers.
20-3.01B(2)(a)(i) Plant Material Review and Tagging
At the discretion of the Engineer, trees and other plant material will be reviewed, photographed, and tagged by the Engineer at the nursery, or other place of growth prior to delivery of plant material to the Project Site. Contractor shall verify with the Engineer if tagging operations are required.

Tagging of plant material at the nursery or place of growth does not cancel the right of the Engineer to reject plant material at the Project Site, if damaged or unacceptable conditions are found that were not detected at the nursery, place of growth, or in the submitted photographs.
20-3.01B(3)(b) Shade and Flowering Trees
Shade Trees: Single-stem trees with straight trunk, well-balanced crown, and intact leader, of height and caliper indicated, conforming to ANSI Z60.1 for type of trees required. Container-grown trees will be acceptable and shall be subject to meeting ANSI Z60.1 limitations for container stock.

Branching Height: 1/3 to 1/2 of tree height, or as indicated.

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Small Trees: Small upright or spreading type, branched or pruned naturally according to species and type, and with relationship of caliper, height, and branching recommended by ANSI Z60.1, Container-grown trees will be acceptable and shall be subject to meeting ANSI Z60.1 limitations for container stock. Stem form shall be as follows:

Form: Single stem, unless otherwise indicated.
20-3.01B(3)(c) Ground Covers
Provide ground covers and plants established and well rooted in removable containers or integral peat pots and with not less than the minimum number and length of runners required by ANSI Z60.1 for the pot size indicated. 20-3.01B(3) Planting Soil
For all planting areas except where Import Bioswale Soil is placed.

Planting Soil Characteristics:
pH: 6 to 7
Organic content: 4-6 percent
Soluble salts: less than 2 dS/m
Texture: 40-65% Sand, 25-60% Silt, 5-20% Clay.

Soil shall be free of stones and clods larger than 1/2”, roots, trash, and other deleterious material not suitable for healthy plant growth.

Planting Soil Source:

Existing topsoil from existing planting areas, stockpiled for use in new planting areas. Existing topsoil may require amendment according to soil fertility laboratory test to meet these specifications.

Import topsoil from local, off-site retail source or manufactured site topsoil. Available import topsoil may require amendment according to soil fertility laboratory test to meet these specifications.

Approved Planting Soil Supplier: American Soils Products, Richmond, CA.

Placement Depth: 24” plus transition layer.

Provide recent laboratory soil test.
20-3.01B(4) Soil Amendments
Organic Compost: Composted organic soil amendment, “Soil Conditioner”, manufactured by American Soils Products, Richmond, CA, or equal as approved by the Engineer.

Organic compost soil amendment shall be mature, stable, weed free, and produced by aerobic decomposition of organic matter. Compost feedstock may include: agricultural, food or industrial residuals; yard trimmings. The product must not contain any visible refuse or other physical contaminants, substances toxic to plants, or over 5% sand, silt, clay or rock material by dry weight. The product shall possess no objectionable odors. The moisture level shall be such that no visible water or dust is produced when handling the material. The material shall be certified by the US Composting Council. Biosolids shall not be included.

Contractor shall submit proof of the soil conditioner compost product use by providing a sample as identified herein this Section, and the most recent lab analysis. Substitution for “Soil Conditioner” must be requested in writing by the Contractor and approved in writing by the Engineer at least 30 days prior to installation. The organic amendment shall have (at a minimum) the following properties:
pH 6.0 – 8.5
Total Nitrogen (N) 1.0%
Phosphorus (as P2O5) 2.0%
Potassium (as K2O) 0.2%
Carbon-to-Nitrogen Ratio <25-to-1
Soluble Salt Concentration <10dS/m

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Moisture 30-65% dry weight analysis
Organic Matter 30-65% dry weight analysis
Screen Analysis 98% passing 3/4” screen or smaller
Bulk Density 1,000 to 1,100 pounds/cubic yard
Stability >80% relative to positive control
Maturity >80% relative to positive control
Lime: ASTM C 602, Class T, agricultural limestone, containing a minimum 80% calcium carbonate equal, with a minimum 99 percent passing a No. 8 sieve and a minimum 75 percent passing a No. 60 sieve. Provide lime in the form of dolomitic limestone.

Aluminum Sulfate: Commercial grade, unadulterated.

Sand: Clean, washed, natural or manufactured sand, free of toxic materials.

Perlite: Horticultural perlite, soil amendment grade, 6.5 to 7.5 pH.

Peat Humus: Finely divided or granular texture, with a pH range of 6 to 7.5, composed of partially decomposed moss peat (other than sphagnum), peat humus, or reed-sedge peat.

Peat Humus: For acid-tolerant trees and shrubs, provide moss peat, with a pH range of 3.2 to 4.5, coarse fibrous texture, medium-divided sphagnum moss peat or reed-sedge peat.

Sawdust or Ground-Bark Humus: Decomposed, nitrogen-treated, of uniform texture, free of chips, stones, sticks, soil, or toxic materials. When site treated, mix with at least 0.15 lb of ammonium nitrate or 0.25 lb of ammonium sulfate per cu. ft. loose sawdust or ground bark.

Manure: Well-rotted, unleached stable or cattle manure containing not more than 25 percent by volume of straw, sawdust, or other bedding materials; free of toxic substances, stones, sticks, soil, weed seed, and material harmful to plant growth.

Herbicides: EPA registered and approved, of type recommended by manufacturer. Use only as approved by Engineer.

Water: Clean, fresh, and potable.

Gypsum: Commercially processed and packaged agricultural-grade (CaSO4) Calcium Sulfate Product, 92.0% minimum, pH at 7.1. Ninety percent (90%) shall pass through a 50-mesh screen. The acceptable commercial grade product used shall be Domtar Gypsum, or equal as approved by the Engineer.

Iron Sulfate: Ferric or ferrous sulfate in dry application, pelleted or granular form, containing not less than 20% metallic iron, and 10% sulfur. It shall conform to the Agricultural Code of the State of California. The acceptable commercial grade product used shall be Cal Iron Plus, or equal as approved by the Engineer.

Soil Sulfur: Elemental Sulphur (99%) commercially manufactured. Sizing on stacked screen shall be approximately: 8- mesh 4.3%; 20-mesh 7.8%; 50-mesh 46.9%; 100-mesh 39.3%; 200-mesh 1.7%. The acceptable commercial grade product used shall be Wil-Gro, Union Chemicals, or equal as approved by the Engineer.

Iron Oxide: 45% iron (expressed as metallic iron) derived from iron oxide with micronutrients.

Sulfate of Potash: Agricultural grade product containing 50% to 53% of water-soluble potash.

Single Superphosphate: Commercial grade product containing 20% to 25% available phosphoric acid.

Ammonium Sulfate: Commercial grade product containing approximately 21% ammonia.

Ammonium Nitrate: Commercial grade product containing approximately 34% ammonia nitrogen.

Iron: Commercial grade product containing approximately 45% Iron (Fe), non-staining, Gro-Power Premium Green Iron, or equal as approved by the Engineer.

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Volcanic Rock: Clean, free of materials toxic to plant growth, 60 lbs. per cubic foot maximum damp weight, 0 to 1/4” diameter.

Water Storing Polymer: “Broadleaf P4”, as manufactured by Broadleaf Industries, Chula Vista, CA 619-585-5000, or equal as approved by the Engineer.

Soil Conditioner: Composted organic soil amendment, “Soil Conditioner”, manufactured by American Soils Products, Richmond, CA or equal as approved by the Engineer.
20-3.01B(5) Fertilizers
Composition: Nitrogen (N), phosphorous (P), and potassium (K) content.

Fertilizer shall be furnished in amounts recommended from the soil analysis, as reported from a qualified soil-testing agency. Refer to previous section.

Steamed Bone Meal: OMRI-certified, commercial, raw, finely ground; minimum of 4 percent nitrogen and 20 percent phosphoric acid.

Blood Meal: OMRI-certified, or equal.

Feather Meal: OMRI-certified, commercial, supplied mixed with chicken manure to encourage decomposition, pelletized; minimum of 12% nitrogen.

Mycorrhizal Inoculum for Plant Materials from Container Stock: In addition to providing Fertilizer, provide a dual soilconditioning biological inoculum system of endo-and ecto- Mycorrhizal to further aid the plants ability to efficiently uptake available soil nutrients and also increase resistance to drought. Approved suppliers include:
7-gram Myco-Pak, Tri-C Enterprises LLC, Chino, CA, 800-927-3311 4 oz. Packet - Roots 1 Step, Roots, Inc., Independence, MO, 800-342-6173 Or approved equal.
20-3.01B(6) Structural Soil
The Contractor shall provide and place structural soil in the location as shown in the Plans. You shall coordinate the installation with the provisions of Section 11.24 CONCRETE WORK of these Special Provisions. Structural Soil shall comply with the following:

ASTM: American Society of Testing and Materials
USDA: United States Department of Agriculture
AASHTO: American Association of State Highway and Transportation Officials Provide Structural Soil, complete as shown and specified.

Contractor shall submit certificates for clay loam soil and crushed stone components of Structural Soil. Certificates shall be prepared by an independent testing laboratory. Certificates shall state: name and address of laboratory, physical properties of material, and chemical properties of material.

Supplier of Structural Soil mix shall supply certificate of testing. Certificate shall be prepared by an independent testing laboratory. Certificates shall state: name and address of laboratory, California Bearing Ratio of 50 or greater (ASTM D1883; AASHTO T 193), and dry weight of stone in blend.

The clay loam soil shall have the following physical properties and proportions by volume compared to the USDA Soil Classification System:

Gravel, less than 1%
Sand, 20-50%
Silt 20-50%
Clay 20-40%

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Chemical analysis to meet following criteria:
pH 5.5-7.5
Organic matter 2-5% by dry weight
Free of toxic elements and compounds
Soluble salt less than 1.0 millimho per cm.

Fertilizers of types and in proportions recommended by soils report generated by the manufacturers of the structural soil.

The crushed stone shall be angular crushed stone of a clean hard dense character that can withstand compaction without crumbling and will not disintegrate in water. Size of stones shall be between ¾” and 1½” and specific gravity between 2.5 and 3.

Sieve analysis:
2” 100%
1½” 94%
1” 43%
¾” 12%
½” 7%
3/8” 4%
#4 2%
Hydrogel shall be a potassium copolymer, with properties that will adhere soil to stone, such as Gelscape (manufactured by Amereq,Inc, New York, NY; phone: 800 832 8788) or Broadleaf P4 (manufactured by Broadleaf Industries, Costa Mesa, CA; phone: 800 628-7374).

A certified company shall blend the Structural Soil consisting of clay loam, crushed stone, tackifier and water in following proportions by volume:

Crushed stone 100 units
Clay loam soil 20 units
Tackifier 0.03 units
Water As needed for soil to adhere to stone
Obtain a uniform mixture without clumps. Obtain a mixture within 1% of optimum moisture content as measured by AASHTO T 99 (ASTM D 698).

The Engineer offers the following companies who can mix the Structural Soil:

American Soil & Stone (Richmond Annex), 2121 San Joaquin Street, Bldg.A Richmond, CA 94804; (510) 292- 3000
TMT Enterprises, 1996 Old Oakland Road, San Jose, CA; contact Matt Moore at (408) 432-9040 Gail Materials, 1256 Magnolia, Corona, CA; contact Nick Leinen at (909) 279-1095 Axner Excavating, Inc., 2900 Old Oregon Trail, Redding, CA; contact Ed Axner, Jr. at (530) 222-0539 20-3.01B(7) Weed Control Barrier / Filter Fabric
Type: Permeable weed barrier fabric, “Style 0040” by Amoco Fabrics and Fibers Company, or “Typar 3401” by Reemay, or equal as approved by the Engineer.
20-3.01B(8) Stakes

DOWNTOWN STREETSCAPE PROJECT
PHASE II 74 Spec No.2021-179
Trees without grate and at Tree Grate Type 2: Two lodgepole pine tree stakes, 3’ diameter, driven into soil outside of the tree’s rootball area. One pair of flexible black vinyl tree ties for each pair of tree stakes, attached with 11/4” galvanized screws.

Tree ties: Cinch-Tie (V.I.T. Products, Inc, 800-729-1314, www.vitproducts.com). Or approved equal.

Trees at Tree Grate Type 1: Mega Grate Stake system, bolt-on steel stake with adjustable height ‘T’ bar, UV resistant vinyl tubing, powder-coated black. Supplier: J. R. Partners, 47410 Via Florence, La Quinta, CA 92253, 209-634-7791. 20-3.01B(9) Miscellaneous Materials
Anti-Desiccant: Water-insoluble emulsion, permeable moisture retarder, film forming, for trees and shrubs. Deliver in original, sealed, and fully labeled containers and mix according to manufacturer's instructions. (Aquatrols Corporation, Cherry Hill, NJ (609) 751-0309, or equal as approved by the Engineer).

Water: Clean, fresh, and potable.

Stress Reducing Agent: Roots Concentrate, as manufactured by Roots, Inc., New Haven, CT 203-786-5295, or equal as approved by the Engineer.

Wetting Agent and Soil Penetrant: Roots NoBurn, as manufactured by Roots, Inc., New Haven, CT 203-786-5295, or equal as approved by the Engineer.
20-3.01C Construction
20-3.01C(1) General
Installation practices of the landscape plant materials shall be performed during those periods when weather and soil conditions are suitable and in accordance with locally accepted horticultural practice, as approved by the Engineer.

Contractor shall notify the Engineer in writing the anticipated commencement date and length of duration of the landscape installation.

Examine areas to receive landscaping for compliance with requirements and for conditions affecting performance of Work of this Section. Do not proceed with installation until unsatisfactory conditions have been corrected. No planting shall be done in any areas until they have been satisfactorily prepared in accordance with this Section.

Soil moisture level prior to planting shall be no less than 75% of field capacity. The determination of adequate soil moisture for planting shall be the sole judgment of the Engineer, and their decision shall be final.

If the soil moisture level is found to be insufficient for planting, all planting pits shall be filled with water and allowed to drain before commencing planting operations.

No more plants shall be distributed in the planting area on any day than can be planted and watered on that day. All plants shall be planted and watered as specified herein immediately after the removal of their containers. Containers shall not be cut prior to placing the plants in the planting area. Lay out individual tree and shrub locations and areas for multiple plantings. Stake locations, outline areas, and secure Engineer’s acceptance before the start of planting work.

Make minor adjustments as may be required.

Prior to Work in this Section, Contractor shall examine previously installed Work from other trades and verify that such Work is complete and as required, to the point where the installation of the landscape may commence properly.

Planting areas, which become compacted in excess of 85% relative compaction due to construction activities, shall be tilled and thoroughly cross-ripped to a minimum depth of 9” to alleviate the condition, taking care to avoid all existing subsurface utilities, drainage, etc.
20-3.01C(1) Protection of site
Contractor shall protect existing and new improvements and systems installed prior to planting installation. Maintain protection in place until completion of Work and maintenance period.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 75 Spec No.2021-179
Protect concrete paving, headers, and drainage from staining due to contact with wet nitrogen stabilized mulch/sawdust or contact with chelated iron. Correct any stained concrete. 20-3.01C(2) Agronomic Soils Report Recommendation
Planting operations shall not commence until the results of the Agronomic Soils Report are reviewed by the Engineer.

The Agronomic Soils Report Recommendation shall take precedence over the amendment and fertilizer application rates specified herein or on the Contract Documents.
20-3.01C(1) Percolation Tests
Prior to installing any plant material, the Contractor shall perform a minimum of four (4) percolation tests in representative areas of the project site to verify acceptable natural drainage for the planting pits of the plant material.

The Contractor shall verify the locations of the percolation tests through the direction of the Engineer. Each test shall be performed as follows:

Dig a hole 2’-0” wide x 2’-0” long x 2’-0” deep.

Fill the hole with water to top and cover with plywood and barricade. Allow hole to drain and fill again to top.

Make daily observations, noting the depth of water each day.

Report findings, in writing, to the Engineer. Include the length of time the water takes to drain completely from each hole, date of test, location, and other information, which may be useful in providing further recommendations.

Based on the combined results of the Soil Fertility Test and the Percolation Test, the Contractor may be required to install additional tree drainage sumps or other drainage methods at each planting pit for trees larger than 15-gallon container stock. Should additional tree drainage sumps or other methods are needed, based on the results of the soil fertility and percolation tests, per the direction of Engineer, then fair and adequate compensation shall be awarded to the Contractor to provide these additional measures.
20-3.01D Payment
Not used.
20-3.02 PLANTING WORK
20-3.02A General
Section 20-3.02 includes specifications for planting plants. 20-3.02B Materials
Not used.
20-3.02C Construction
20-3.02C(1) Preparing Planting Areas
Planting Soil Depth: Full depth of 24” plus transition layer wherever planting occurs.

Excavate and remove existing soil to 2’ depth from final finish grade.

Loosen subgrade of planting bed areas to a depth of 8”. Hand-scarify existing site soil on sides of planting beds to encourage lateral root growth.

Spread planting soil mixture in 6” lifts to depth required meeting thickness, grades, and elevations shown, after light rolling and natural settlement. Place first lift of planting soil mixture and work into the top 6” of loosened subgrade to create a 1’ transition layer and then place remainder of planting soil mixture.

If amendment is required after placement of planting soil, spread amendments evenly on surface and incorporate using mechanical rotary and hand tools to achieve depth required meeting thickness, grades, and elevations shown, after light rolling and natural settlement.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 76 Spec No.2021-179
Incorporate mycorrhizal inoculum into planting soil.

Where excavation and bed preparation practices are determined by the Engineer to cause damage to roots of existing trees to remain, a revised depth of 6”-12” for planting soil plus transition layer may be approved. 20-3.02C(2) Finish Grading
Finish grading shall be as indicated on the Civil Engineer Drawings, unless otherwise noted on the Contract Drawings prepared by the Engineer or noted herein this Section. Contractor shall report discrepancies (if any) to the Engineer and Civil Engineer for clarification and resolution.

Finish grades shall be measured at the top surface of surface materials. The finish grade below adjacent paving, curbs, or headers shall be two inches (2”) in shrub and/or groundcover areas.

Remove all rocks two inches (2”) and larger to a depth of four (4”) inches below finish grade of shrub and groundcover areas and all other growth or debris from the site.

Fill gullies or ruts in excess of one (1”) inch deep on areas to be planted with shrubs and groundcovers using adjacent soil, and compact soil to adjacent finish grade of soil.

Contractor shall take every precaution to protect and avoid damage to sprinkler heads, irrigation lines, drainage lines, improvements by other trades, and all underground utilities during grading and conditioning operations. The Contractor shall maintain established site grades and drainage during all stages of landscape construction.

The finish grading shall be smooth, uniform, and free from abrupt grade changes and depressions to insure positive drainage of the site. All surface drainage shall drain away from buildings, walls, and walks, and shall drain towards roadways, streets, gutters, drains, and catch basins.

Final grades shall be acceptable to the Engineer before commencement of planting operations. Planting or other landscape site construction improvements installed without prior approval of finish grades by the Engineer shall be reinstalled under requirements of this Section and other Sections of the Contract Specifications, with no additional cost to the Owner.
20-3.02C(3) Planting Plants
20-3.02C(3)(a) Excavation for Trees and Shrubs
Pits and Trenches: Excavate with vertical sides and with bottom of excavation slightly raised at center to assist drainage. Loosen hard subsoil in bottom of excavation.

Container-Grown Trees and Shrubs: Excavate to three times (3x) the container width and depth, plus the following setting-layer depth, or as further directed by the Engineer:

Setting Layer: Allow three (3”) inches of planting soil.

Set top of rootball even with finish grade.

Dispose of subsoil removed from landscape excavations. Do not mix with planting soil or use as backfill.

Obstructions: Notify Engineer if unexpected rock or obstructions detrimental to trees or shrubs are encountered in excavations.

Drill twelve-inch (12”) diameter holes three feet (3’) deep, or to water table, whichever is less, and backfill with planting soil.

Drainage: Notify Engineer if subsoil conditions evidence unexpected water seepage or retention in tree or shrub pits.

Fill excavations with water and allow to percolate out, before placing setting layer and positioning trees and shrubs. 20-3.02C(3)(b) Planting Trees and Shrubs

DOWNTOWN STREETSCAPE PROJECT
PHASE II 77 Spec No.2021-179
Set container-grown stock plumb and in center of pit or trench with top of ball raised above adjacent finish grades as indicated.

Carefully remove containers so as not to damage root balls.

Place stock on setting layer of compacted planting soil.

Place backfill around ball in layers, tamping to settle backfill and eliminate voids and air pockets. When pit is approximately 1/2 backfilled, water thoroughly before placing remainder of backfill. Repeat watering until no more is absorbed. Water again after placing and tamping final layer of backfill.

Dish and tamp top of backfill to form a three inch (3”) high mound around the rim of the pit. Do not cover top of root ball with backfill.

Plant Settling: Any tree or shrub that has settled deeper than the surrounding grade shall be raised to the correct level, to the satisfaction of the Engineer.
20-3.02C(3)(b)(i) Pruning Plant Material
At no time shall any plant material be pruned, trimmed, thinned, shaped, or topped prior to delivery. Any pruning, trimming, thinning, shaping, or topping of plant material shall be only conducted on the Project Site, and under the presence and direction of the Engineer. Any plant material that has been pruned and delivered to the Project Site without prior approval by the Engineer or approved Certified Arborist shall be rejected.

When directed by the Engineer or an approved certified Arborist, Contractor shall prune, thin, and shape plant material according to standard horticultural practice to preserve the natural character of the plant material.

Prune trees to retain required height and spread. Unless otherwise directed by the Engineer or Certified Arborist, do not cut tree leaders; remove only injured or dead branches from flowering trees.

All pruning and remedial work shall be done under continuous supervision of the Engineer or approved Certified Arborist, and per ANSI A-300 Pruning Standards. The Arborist shall be certified by the International Society of Arborists (ISA); or the Certified Arborist who is a member of the American Society of Consulting Arborists, in compliance with ISA and ANSI Standards.

Provide pruning, cabling and bracing, irrigation, pest and disease control and other remedial treatments as recommended by the Engineer or approved Certified Arborist, as required, to assure the long-term health of the trees and existing vegetation, and the safety of persons and property. 20-3.02C(3)(b)(ii) Tree Staking and Tying
Upright Staking and Tying: Stake all trees unless directed otherwise by Owner’s Authorized Representative. Install Mega Stake per manufacturer’s specifications. Orient tree with nursery stake on same side as Mega Stake. Remove nursery stake.

Provide additional tree ties, as directed by the Engineer, to tree trunks and stakes, to firmly support tree trunk and canopy.
20-3.02C(3)(c) Groundcovers and Plants
Spacing: Space ground cover and plants at spacing indicated on the Contract Drawings. Plants shall be triangular spaced, or as indicated on the Contract Drawings.

Dig holes large enough to allow spreading of roots and backfill with planting soil. Work soil around roots to eliminate air pockets and leave a slight saucer indentation around plants to hold water. Water thoroughly after planting, taking care not to cover plant crowns with wet soil.

Plant Settling: Any groundcover or other plant that has settled deeper than the surrounding grade shall be raised to the correct level.
20-3.02C(3)(d) Installation of Miscellaneous Materials

DOWNTOWN STREETSCAPE PROJECT
PHASE II 78 Spec No.2021-179
When deciduous trees or shrubs are moved in full-leaf, spray with anti-desiccant at nursery before moving and again two (2) weeks after planting. Apply anti-desiccant using power spray to provide an adequate film over trunks, branches, stems, twigs, and foliage.
20-3.02C(3)(e) Cleanup and Protection
During landscaping operations, keep pavements clean and Work area in an orderly and safe condition. Contractor shall remove all trash caused from his Work on a weekly basis throughout the duration of the Work.

Protect landscaping from damage due to landscape operations, operations by other Contractors and trades, and trespassers. Maintain protection during installation and maintenance periods. Treat, repair, or replace damaged landscape work as directed.

Upon completion of his Work under this Section, the Contractor shall remove all rubbish, waste, debris, excess construction materials, and other items resulting from construction operations offsite as described herein this Section and directed by the Engineer.

All scars, ruts, or other marks in the ground caused by the Contractor’s Work shall be repaired.

Remove all equipment and implements of service and leave the entire Project Site area in a neat, clean, and Ownerapproved condition. All sidewalks, driveways, pavements, and site areas shall receive a broom-clean treatment or other cleaning treatment as directed by the Engineer.
20-3.02C(3)(f) Disposal of Surplus and Waste Materials
Disposal: Contractor shall remove surplus soil and waste material, including excess subsoil, unsuitable soil, trash, and debris, and legally dispose of it off the Owner's property. 20-3.02C(3)(g) Final Review
A Final Review shall be performed upon completion of the Maintenance Period.

Contractor shall request attendance at the review by the Owner, Engineer, and other parties designated by the Owner of not less than one (1) week prior to the end of the Maintenance Period.

At the time of Final Review, planting areas shall be free of weeds and neatly cultivated. Contractor shall perform all necessary corrective work and replacement of materials as identified.

Work requiring corrective measures by the sole judgment of the Engineer shall be completed within ten (10) days of the Final Review.

Corrective Work and materials replacement shall be in accordance with the Contract Drawings and Contract Specifications and shall be made at no expense to the Owner.

Maintenance Period shall be continued at no expense to the Owner as determined by the Engineer until final acceptance of the completed Work is accomplished.

Contractor shall request a review upon completion of corrective Work and materials replacement.

If, after review, the Engineer finds the Work has been performed in accordance with the Contract Drawings and Contract Specifications, and plant materials are in satisfactory growing condition, a written notice of acceptance at the end of the Maintenance Period shall be issued by the Engineer. 20-3.02D Payment
Not used.

Replace section 20-4 with:
20-4.01 GENERAL

DOWNTOWN STREETSCAPE PROJECT
PHASE II 79 Spec No.2021-179
General Landscape Maintenance: Work Specified in this Section- furnish all labor, material, equipment and services required to maintain the landscape as specified herein for a period of one (1) year (365 days). General Landscape maintenance includes providing an operable irrigation service.

Tree Maintenance: Work Specified in this Section- furnish all labor, material, equipment and services required to maintain the trees as specified herein for a period of two (2) years. Tree maintenance includes providing an operable irrigation service.

The Contractor shall continuously maintain all areas involved in this Contract during the progress of the work. Improper maintenance or possible poor condition of any planting at the termination of the scheduled maintenance period may cause postponement of the final completion date of the Contract. Maintenance shall be continued by the Contractor until all work is accepted by the Engineer.

Start of Maintenance Criteria - Maintenance Period shall not start until all elements of construction, planting, and irrigation for the entire project are completed and accepted in writing.

The Contractor shall request an inspection to begin the plant maintenance period after all planting and related work has been completed in accordance with the Contract documents. All groundcover areas shall be planted. If such criteria are met to the satisfaction of the Engineer, a field notification will be issued to the Contractor to establish the effective beginning date of the period.

The Contractor’s Maintenance Period will be extended if the provisions required within the plans and specifications are not filled.

Prior to start of maintenance period, the Contractor shall submit a schedule of all activities planned during the maintenance period. This shall be accepted by the Engineer prior to the start of maintenance. All schedule changes shall be documented and accepted by the Engineer.

The Contractor shall provide protection of all planting areas against traffic or other damage by erecting fencing or other protection devices immediately after planting is completed. Warning signs, flags, and/or barricades shall be placed in high-traffic areas. Damaged areas shall be repaired immediately by the Contractor at no cost to the Owner.

All plant material installed under the Contract shall be guaranteed against any and all poor, inadequate or inferior materials and/or workmanship for a period of one (1) year. Any plant found to be dead or in poor condition due to faulty materials or workmanship, as determined by the Engineer, shall be replace by the Contractor at his expense.

General Landscape: The start of the Guarantee Period shall commence upon completion of the 1-year Maintenance Period.

Tree Maintenance: The start of the Guarantee Period shall commence upon completion of the 2-year Maintenance Period.

Any materials found to be dead, missing, or in poor condition during the maintenance period shall be replaced immediately. The Engineer shall be the sole judge as to the condition of the material. Material to be replaced within the Maintenance Period shall be replaced by the Contractor within fifteen (15) days of written notification by the Engineer.

Replacement trees covered by the Discretionary Tree Replacement shall be installed in or near the project area within twenty-one (21) days’ notice at the direction of the Engineer.

Normal progress inspection shall be requested by the Contractor from the Engineer at least seven (7) working days in advance of an anticipated inspection. Inspections shall be at the commencement and completion of the maintenance period.

All conditions noted in Landscape Planting section shall apply herein. 20-4.02 MATERIALS
All materials used shall either conform to Landscape Planting specifications in other sections

DOWNTOWN STREETSCAPE PROJECT
PHASE II 80 Spec No.2021-179
or shall otherwise be acceptable to the Engineer. The Engineer shall be given monthly record of all herbicides, insecticides, and disease control chemicals used.
20-4.02A Maintenance Fertilizer
Commercial grade complete fertilizer of neutral character, consisting of fast and slow release nitrogen. Uniform "beaded” homogeneous mixture, 100% passing through #4 mesh screen, composition suitable for application with approved equipment and shall contain the following minimum available percentages by weight of plant food. Chemical analysis shall include 50% Humus, 15% Humic Acids, 1% Soluble Metalic Iron, and soil bacteria.

Nitrogen 5% minimum
Phosphoric acid 3% minimum
Potash 1% minimum
20-4.02B Controlled Release Fertilizer
Commercial grade complete fertilizer of neutral character, consisting of fast and slow release nitrogen. Uniform "beaded” homogeneous mixture, 100% passing through #4 mesh screen, composition suitable for application with approved equipment and shall contain the following minimum available percentages by weight of plant food. Chemical analysis shall include 25% Humus, 5% Humic Acids, and 2% Iron Nitrogen 12% minimum
Phosphoric acid 8% minimum
Potash 8% minimum
20-4.02C Irrigation
Provide replacement irrigation parts per irrigation plans as necessary. 20-4.03 CONSTRUCTION
20-4.03A Maintenance
All areas shall be kept free of debris and all planted areas shall be weeded and cultivated at intervals of not more than ten (10) days. Watering, mowing, rolling, edging, trimming, fertilization, spraying, and pest control, as may be required, shall be included in the Maintenance Period.

The Contractor shall be responsible for maintaining adequate protection of the planting areas. Damaged areas shall be repaired at the Contractor’s expense.
20-4.03B Shrub and Groundcover Care
20-4.03B(1) Watering
Ensure proper irrigation system operation. If required for supplemental watering, provide and maintain a large enough water basin around plants so that enough water can be applied to establish moisture through the major root zone.

When hand watering, use a water wand to break the water force. Use mulches to reduce evaporation and frequency of watering.
20-4.03B(2) Weed Control
Keep basins and areas between plants free of weeds using hand and tool methods. Avoid frequent soil cultivation that destroys shallow roots. Use mulches to help prevent weed seed germination. Non-toxic treatments such as white vinegar may be used to control weeds in cracks. Use recommended legally approved herbicides only with written approval of the Engineer. Use of herbicides is discouraged in accordance with Alameda County Bay Friendly guidelines. 20-4.03B(3) Insect and Disease Control
Apply non-toxic insecticidal soaps and other natural treatments. Refer to the Alameda County Bay Friendly guidelines for appropriate treatments. If infestation persists, maintain a reasonable control with insecticides after receipt of written approval by Engineer.
20-4.03B(4) Fertilization
Fertilize all planting areas with the following: At the end of the maintenance period: 20 lbs. per 1,000 sf. of controlled release top-dress fertilizer.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 81 Spec No.2021-179
Avoid applying fertilizer to the root ball and base of main stem; rather, spread evenly under plant to drip line.

Replacement of Plants: Replace dead, dying, and missing plants with plants of a size, condition, and variety acceptable to Engineer at Contractor’s expense.
20-4.03C Tree Care
20-4.03C(1) Watering
Ensure proper irrigation system operation. If required for supplemental watering, provide and maintain a 3 foot diameter or larger water basin around trees so that enough water can be applied to establish moisture through the major root zone. When hand watering, use a water wand to break the water force. Use mulches to reduce evaporation and frequency of watering.
20-4.03C(2) Weed Control
Keep basins and areas below tree free of weeds using hand and tool methods. Avoid frequent soil cultivation that destroys shallow roots. Use mulches to help prevent weed seed germination. Use recommended legally approved herbicides only with written approval of the Engineer. Use of herbicides is discouraged in accordance with Alameda County Bay Friendly guidelines.
20-4.03C(3) Insect and Disease Control
Apply non-toxic insecticidal soaps and other natural treatments. Refer to the Alameda County Bay Friendly guidelines for appropriate treatments. If infestation persists, maintain a reasonable control with insecticides after receipt of written approval by Engineer.
20-4.03C(4) Fertilizing
Fertilize as specified under Shrub care.
20-4.03C(5) Pruning
Pruning shall be performed only under the supervision of a certified arborist. The following on-line information is useful:
http://www.urbantree.org/index.html
20-4.03C(6) Maintenance Every Three Months
Inspect for and remedy any wear on trunk and branches against stakes, tree grate, or other item near tree.

Inspect tree stake and ties.

Check irrigation to each tree for clogging, flooding, erosion, breakage, or other harmful conditions.

During fall and winter seasons, provide selective pruning of trees under the direction of a certified arborist to eliminate poor branching structure, broken branch stubs, and branches below six feet that conflict with vehicular/pedestrian access and visibility. Do not prune leaders.
20-4.03C(7) Tree Stakes
Provide additional staking of trees as required to prevent leaning and damage. Material costs shall be reimbursed by the Owner.

Relocate stakes to better brace tree against wind and to provide proper support.

Provide additional or replacement ties for tree stakes.

Remove tree stakes from each tree as directed by the Engineer. Deliver stakes to County corporation yard as directed. 20-4.03D Final Acceptance of the Project
Prior to the date of the Final Inspection, the Contractor shall acquire from the Engineer approved, reproducible prints and final record from the job record set of all changes made to the all plans during construction, label said prints “AsBuilts”, and deliver to the Engineer and as required to any Local Agency. Prior to the date of Final Inspection, the

DOWNTOWN STREETSCAPE PROJECT
PHASE II 82 Spec No.2021-179
Contractor shall deliver to the Engineer the “Landscape and Irrigation Guarantee” as required. Said guarantee shall be on the Contractor’s letterhead and dated the final acceptance date.

All turn-over items noted in other specification sections shall be delivered prior to a Final Inspection. 20-4.04 PAYMENT
Not used.

Replace section 20-5.03C(2) with:

Gravel mulch must be:

Type: To be selected by Engineer. Bid shall include “Pea Gravel” or similar.

Size: 3/8”
Color: Gray, uniform color
Shall be from only 1 source.

Suppliers: American Soils Products, Richmond, CA; Lynsgo Construction Materials, San Carlos, CA; Or equal.

Replace the first sentence of section 20-5.03C(3) with:

Apply 2” of Gravel Mulch to entire planting area indicted for Gravel Mulch and compact it by rolling.

Replace sections 20-5.04B(2) through 20-5.04B(4) with:
20-5.04B(2) Organic Mulch
Organic Mulch shall be well composted. Suitable as a top dressing of trees, shrubs and groundcovers, consisting of following:

Type: Shredded recycled wood products consisting of 100% recycled, hand sorted, chipped and screened urban lumber. Color stained to dark brown using UV resistant organic mineral. Mulch shall be graded to average dimensions of one-half inches (1/2”) to two inches (2”) in length, and flat in cross section.

Coverage depth shall be a minimum of two inches (2”), or as indicated on the Contract Drawings.

Acceptable Products & Manufacturers: Dark Brown Decorative Mulch, American Soils Products, Richmond, CA, or equal.

Replace item 1 in the list in the 1st paragraph of section 20-5.03D(2)(a) with:

1. Uniform tan color
Replace section 20-5.05 with:
20-5.05 SITE FURNISHINGS
20-5.05A General
20-5.05A(1) Summary
This Section includes all materials, labor, transportation, services, and equipment necessary for and reasonably incidental to perform the installation of site and street furnishings as shown on the Contract Drawings, and as specified herein this Section. The Work under this Section consists of furnishing and installing the following:

Trash Receptacle
Bicycle Rack
Bench
Tree Grate Type 1
Tree Grate Type 2
Planter Rail
20-5.05A(2) Quality Assurance

DOWNTOWN STREETSCAPE PROJECT
PHASE II 83 Spec No.2021-179
Installer Qualifications: Engage an experienced Installer who has completed in the last five (5) years and at least five (5) installations similar in material, design, and extent to that indicated for this Project. Installer will assign mechanics from these earlier applications to this Project, of which one will serve as lead mechanic.

Single-Source Responsibility: Obtain each type of unit of furnishings from a single source with resources to provide products and materials of consistent quality in appearance and physical properties without delaying the Work. 20-5.05A(3) Submittals
Contractor shall submit shop drawings to show component parts, fabrication, installation, and dimensions for all units indicated herein this Section. Show vandal resistant mounting hardware. Submit shop drawings for review by the Engineer.

Submit manufacturer’s product data for review by the Engineer.

For installed products indicated to comply with design loads, include structural analysis data signed and sealed by the qualified professional engineer responsible for their preparation.

Submit samples for each material and finish. Provide powdercoat sample for each separate manufacturer. 20-5.05A(4) Coordination
The Contractor shall coordinate the installation of all furnishings in this Section with all other related Work of this Contract.

The Contractor shall be responsible for verifying the dimensions and required hardware of the furnishings prior to commencing installation Work.

Particular attention shall be given to coordinating furnishing footings with utility locations to avoid any conflicts. 20-5.05A(5) Storage and Handling
All new furnishings shall be stored as necessary to prevent damage and shall be in new condition when ready for installation. It shall be the responsibility of the Contractor to install “factory condition” furnishings 20-5.05B Materials
20-5.05B(1) Trash Receptacle
Approved Manufacturer: Victor Stanley. (Representative: Rebecca Casey, 800.430.6206x1313, email [email protected])
Approved Design: RSDC-45. Provide shop drawings or manufacturer’s cut-sheet.

Powdercoat Color: per plans, or equal manufacturer’s standard powdercoat color if approved by Engineer.

Surface mount.
20-5.05B(2) Bicycle Rack
Custom bicycle rack per drawings.

Manufacturer: Creative Pipe, Inc. P.O. Box 2458, Rancho Mirage, California 92270-1087, 800.644.8467, Email:
[email protected], or equal.

Color and Finish: powdercoat color per plans, or equal manufacturer’s standard powdercoat color if approved by Engineer.
20-5.05B(3) Bench
Approved Manufacturer: Victor Stanley. (Representative: Rebecca Casey, 800.430.6206x1313, email [email protected])

DOWNTOWN STREETSCAPE PROJECT
PHASE II 84 Spec No.2021-179
Approved Design: FM-324 6-ft length. Provide shop drawings or manufacturer’s cut-sheet.

Powdercoat Color: per plans, or equal manufacturer’s standard powdercoat color if approved by Engineer.

Surface mount.
20-5.05B(4) Tree Grate Type 1
Each Grate Unit of all types shall consist of the complete assembly, including the frame, grate (2 pieces), and anchor bolts
Approved Manufacturer: Neenah Foundry, Inc. (Representative: Park Pacific, Ted Jonsson, 888.460.7275, [email protected])
Approved Design: Avenue Collection R-8810. Size 36” x 60” with 16” dia. tree opening. Shall include City of Ukiah Logo, approx. 10” diameter, cast into 2 diagonally opposite corners of grate. Provide shop drawings or manufacturer’s cutsheet.Refer to plans for all types.

Material – Ferrous castings content shall range from 75% post industrial metal (scrap castings, industrial steel scrap) to 100% post consumer scrap (old engine blocks, brake drums, flywheels, etc).

Castings – shall be free of blow holes, flashing, grind marks, and other surface blemishes. Castings shall be per ASTM A-45 class 35 or better
ADA Compliancy- castings shall have holes no greater than ½” in the dominant direction of motion, no vertical rise of greater than ¼”, and minimum coefficient of .6 or better in wet or dry conditions.

Sustainability: manufacturer shall comply with MACT (Maximum Achievable Control Technology) standards, which mandate the use of the latest air filtration technology in the manufacturing process. Production shall include recycled content as described herein.

Color and Finish:

Frame – Steel, painted black with rust resistant flat finish.

Grate – raw finish. Contractor shall coordinate delivery so that grates may be seasoned to develop patina in advance of installation.

Or equal (no known equal).
20-5.05B(5) Tree Grate Type 2
Each Grate Unit of all types shall consist of the complete assembly, including the frame, grate (4 pieces), and anchor bolts
Approved Manufacturer: Neenah Foundry, Inc. (Representative: Park Pacific, Ted Jonsson, 888.460.7275) Approved Design: Boulevard Collection R-8816. Size 60” x 96” with 24” dia. tree opening. Shall include City of Ukiah Logo, approx. 10” diameter, cast into 2 diagonally opposite corners of grate on extension pieces. Provide shop drawings or manufacturer’s cut-sheet.Refer to plans for all types.

Material – Ferrous castings content shall range from 75% post industrial metal (scrap castings, industrial steel scrap) to 100% post consumer scrap (old engine blocks, brake drums, flywheels, etc).

Castings – shall be free of blow holes, flashing, grind marks, and other surface blemishes. Castings shall be per ASTM A-45 class 35 or better
ADA Compliancy- castings shall have holes no greater than ½” in the dominant direction of motion, no vertical rise of greater than ¼”, and minimum coefficient of .6 or better in wet or dry conditions.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 85 Spec No.2021-179
Sustainability: manufacturer shall comply with MACT (Maximum Achievable Control Technology) standards, which mandate the use of the latest air filtration technology in the manufacturing process. Production shall include recycled content as described herein.

Color and Finish:

Frame – Steel, painted black with rust resistant flat finish.

Grate – raw finish. Contractor shall coordinate delivery so that grates may be seasoned to develop patina in advance of installation.

Or equal (no known equal).
20-5.05B(6) Planter Rail
Brackets, Flanges, and Anchors: Same metal and finish as tubing, unless otherwise indicated.

Stainless Steel:

Tubing: ASTM A 554, Grade MT 316L.

Pipe: ASTM A 312/A 312M, Grade TP 316L.

Plate and Sheet: ASTM A 666, Type 316L.

Bars and Shapes: ASTM A 276, Type 316L.

Steel and Iron:

Tubing: ASTM A 500 (cold formed) or ASTM A 513, Type 5 (mandrel drawn), as approved.

Bars: Hot-rolled, carbon steel complying with ASTM A 29/A 29M, Grade 1010.

Plates, Shapes, and Bars: ASTM A 36/A 36M.

Castings: Either gray or malleable iron, unless otherwise indicated.

Gray Iron: ASTM A 48/A 48M, Class 30, unless another class is indicated or required by structural loads.

Malleable Iron: ASTM A 47/A 47M.

Fasteners: Provide concealed fasteners, unless otherwise indicated.

Stainless-Steel Components: Type 316 stainless-steel fasteners.

Steel Components: Plated-steel fasteners complying with ASTM B 633, Class Fe/Zn 25 for electrodeposited zinc coating.

Anchors: Provide cast-in-place or torque-controlled expansion anchors, fabricated from corrosion-resistant materials with capability to sustain, without failure, a load equal to six times the load imposed when installed in unit masonry and equal to four times the load imposed when installed in concrete, as determined by testing per ASTM E 488.

Universal Shop Primer: Fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with MPI#79.

Zinc-Rich Primer: Complying with SSPC-Paint 20 or SSPC-Paint 29 and compatible with topcoat.

Shop Primer for Galvanized Steel: Zinc-dust, zinc-oxide primer compatible with finish paint systems indicated and complying with SSPC-Paint 5.

Grout and Anchoring Cement: Factory-packaged, nonshrink, nonmetallic grout complying with ASTM C 1107, or waterresistant, nonshrink, anchoring cement; recommended by manufacturer for exterior use.

Provide rails capable of withstanding the effects of gravity loads and the following loads and stresses within limits and under conditions indicated:

Uniform load of 50 lbf/ ft. (0.73 kN/m) applied in any direction.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 86 Spec No.2021-179
Concentrated load of 200 lbf (0.89 kN) applied in any direction.

Uniform and concentrated loads need not be assumed to act concurrently.

Control of Corrosion: Prevent galvanic action and other forms of corrosion by insulating metals and other materials from direct contact with incompatible materials.

Finishes: shall be powdercoated, color per plans.
20-5.05C Construction
20-5.05C(1) Inspection
Examine the areas and conditions under which site furnishing units are to be installed and remedy any conditions detrimental to the proper and timely completion of the Work. Do not proceed with the Work until unsatisfactory conditions have been corrected in a manner acceptable to the Engineer. 20-5.05C(2) Installation
Unit(s) shall be furnished and located as shown on the Contract Drawings, and as directed by the Contract Specifications.

Use actual Unit(s) to establish all dimensions for installation.

Erect and install Unit(s) in accordance with manufacturer's instructions and recommendations. Install unit(s) plumb, accurately, and in the correct orientation and relationship with other site furnishings, elements, and/or paving as shown on the Contract Drawings. Verify prior to installation with the Engineer.

Install all footings, anchorage, and mounting hardware, as applicable, in strict accordance with manufacturer's instructions and contract drawings.

Use vandal resistant hardware or industry standard epoxy resin application to nut. 20-5.05C(3) Protection
Protect all furnishings against damage throughout the duration of the construction period, complying with manufacturer's directions.

Touch-up Painting (if applicable): Immediately after erection, clean field welds, bolted connections, and abraded areas of the work. Paint exposed areas with paint or galvanizing material as supplied by the manufacturer. Apply by brush, to thickness recommended by paint manufacturer.
20-5.05C(4) Planter Rail
20-5.05C(4)(a) Fabrication
General: Fabricate railings to comply with design, dimensions, and details indicated, but not less than that required to support structural loads. Form ornamental metal true to line and level with true curves and accurate angles and surfaces. Finish exposed surfaces to smooth, sharp, well-defined lines and arris.

Welded Connections: Cope components at connections to provide close fit, or use fittings designed for this purpose.

Weld all around at connections, including at fittings. Comply with AWS for recommended practices in shop welding.

Clean exposed welded joints of flux, and dress exposed and contact surfaces.

Mechanical Connections: Connect members with concealed mechanical fasteners and fittings.

Form changes in direction by bending.

Form curves by bending in jigs to produce uniform curvature; maintain cross section of member throughout bend without cracking or otherwise deforming exposed surfaces.

Close exposed ends of hollow railing members.
20-5.05C(4)(b) Installation

DOWNTOWN STREETSCAPE PROJECT
PHASE II 87 Spec No.2021-179
Perform cutting, drilling, and fitting required for installing railings. Set railings accurately in location, alignment, and elevation.

Set posts plumb within a tolerance of 1/16 inch in 3 feet (2 mm in 1 m).

Align rails so variations from level for horizontal members and variations from parallel with rake of steps and ramps for sloping members do not exceed 1/4 inch in 12 feet (5 mm in 3 m).

Anchor posts in concrete by inserting into formed or core-drilled holes and grouting annular space.

Provide anchorage devices and fasteners where necessary for securing to in-place construction. 20-5.05D Payment
Not used.

Add after section 20-5.10:
20-5.11 BRICK PAVING
20-5.11A General
20-5.11A(1) Summary
Section 20-5.11 includes general specifications for constructing and installing brick paving. 20-5.11A(2) Quality Assurance
Source Limitations: Obtain each type of brick paver and setting material from one source with resources to provide materials and products of consistent quality in appearance and physical properties.

Mockups: Build one 5’ x 5’ (minimum size) mockup for each paver type and pattern to verify selections made under sample submittals and to demonstrate aesthetic effects and set quality standards for materials and execution. Mockups may become part of final work if approved by Architect.

Preinstallation Conference: Conduct conference at Project site to with Engineer. 20-5.11A(3) Submittals
Contractor shall submit the following for review by the Engineer:

Product data
Sieve analysis for aggregate setting-bed materials, according to ASTM C 136 Samples for initial selection by the Engineer, including full-size units of brick pavers. 20-5.11A(4) Delivery, Storage, and Handling
Store pavers on elevated platforms in a dry location. If units are not stored in an enclosed location, cover tops and sides of stacks with waterproof sheeting, securely tied.

Store aggregates where grading and other required characteristics can be maintained and contamination avoided. 20-5.11B Materials
20-5.11B(1) Brick Pavers
McNear Brick and Block, Commercial Series Clay Brick
Color: To be selected by Engineer from a range of standard colors.

Dimension: “Standard Solid Paver” 3 7/8" x 8 1/8" x 2 7/16" Or equal.
20-5.11B(2) Aggregate Setting-Bed Materials

DOWNTOWN STREETSCAPE PROJECT
PHASE II 88 Spec No.2021-179
20-5.11B(2)(a) Graded Aggregate for Base
Sound, crushed stone or gravel complying with requirements in Division 2 Section "Earthwork" for base course. 20-5.11B(2)(b) Sand for Leveling Course
Sound, sharp, washed natural sand or crushed stone complying with gradation requirements in ASTM C 33 for fine aggregate.
20-5.11B(2)(c) Sand for Joints
Fine, sharp, washed natural sand or crushed stone with 100 percent passing No. 16 (1.18-mm) sieve and no more than 10 percent passing No. 200 (0.075-mm) sieve.
20-5.11B(3)(d) Separation Geotextile
Woven geotextile fabric, manufactured for separation applications; made from polyolefins or polyesters, with elongation less than 50 percent; complying with AASHTO M 288 and the following, measured per test methods referenced:

Survivability: Class 2; AASHTO M 288.

Apparent Opening Size: No. 60 (0.250-mm) sieve, maximum; ASTM D 4751.

Permittivity: 0.02 per second, minimum; ASTM D 4491.

UV Stability: 50 percent after 500 hours' exposure; ASTM D 4355. 20-5.11B(2)(e) Herbicide
Commercial chemical for weed control, registered with the EPA. Provide in granular, liquid, or wettable powder form. 20-5.11C Construction
20-5.11C(1) Examination
Examine areas indicated to receive paving, with Installer present, for compliance with requirements for installation tolerances and other conditions affecting performance.

Proceed with installation only after unsatisfactory conditions have been corrected. 20-5.11C(2) Preparation
Proof-roll prepared subgrade according to requirements in Division III Section 19 "Earthwork" to identify soft pockets and areas of excess yielding. Proceed with unit paver installation only after deficient subgrades have been corrected and are ready to receive base course for unit pavers.
20-5.11C(3) Installation
20-5.11C(3)(a) General
Do not use unit pavers with chips, cracks, voids, discolorations, and other defects that might be visible in finished work.

Mix pavers from several pallets or cubes, as they are placed, to produce uniform blend of colors and textures.

Cut unit pavers with motor-driven masonry saw equipment to provide clean, sharp, unchipped edges. Cut units to provide pattern indicated and to fit adjoining work neatly. Use full units without cutting where possible. Hammer cutting is not acceptable.

Joint Pattern: As indicated on contract drawings.

Tolerances: Do not exceed 1/32-inch (0.8-mm) unit-to-unit offset from flush (lippage) nor 1/8 inch in 10 feet (3 mm in 3 m) from level, or indicated slope, for finished surface of paving.

Expansion and Control Joints: Provide joint filler at locations and of widths indicated. Install joint filler before setting pavers. Make top of joint filler flush with top of pavers. 20-5.11C(3)(b) Aggregate Setting-Bed and Paver Installation Compact soil subgrade uniformly to at least 95 percent of ASTM D 698 laboratory density.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 89 Spec No.2021-179
Proof-roll prepared subgrade to identify soft pockets and areas of excess yielding. Excavate soft spots, unsatisfactory soils, and areas of excessive pumping or rutting, as determined by Owner’s Authorized Representative, and replace with compacted backfill or fill as directed.

Place separation geotextile over prepared subgrade, overlapping ends and edges at least 12 inches (300 mm).

Place aggregate base, compact to 95 percent of ASTM D 1557 maximum laboratory density, and screed to depth indicated.

Place leveling course and screed to a thickness of 1 to 1-1/2 inches (25 to 38 mm), taking care that moisture content remains constant and density is loose and constant until pavers are set and compacted.

Treat leveling course with herbicide to inhibit growth of grass and weeds.

Set pavers with a minimum joint width of 1/16 inch (1.5 mm) and a maximum of 1/8 inch (3 mm), being careful not to disturb leveling base. Use string lines to keep straight lines.

Vibrate pavers into leveling course with a low-amplitude plate vibrator capable of a 3500- to 5000-lbf (16- to 22-kN) compaction force at 80 to 90 Hz. Perform at least three passes across paving with vibrator. Vibrate under the following conditions:

After edge pavers are installed and there is a completed surface or before surface is exposed to rain.

Before ending each day's work, fully compact installed concrete pavers to within 36 inches (900 mm) of the laying face. Cover pavers that have not been compacted, and leveling course on which pavers have not been placed, with nonstaining plastic sheets to protect them from rain.

Spread dry sand and fill joints immediately after vibrating pavers into leveling course. Vibrate pavers and add sand until joints are completely filled, then remove excess sand. Leave a slight surplus of sand on the surface for joint filling.

Do not allow traffic on installed pavers until sand has been vibrated into joints.

Repeat joint-filling process 30 days later.
20-5.11C(3)(d) Repairing and Cleaning
Remove and replace unit pavers that are loose, chipped, broken, stained, or otherwise damaged or that do not match adjoining units. Provide new units to match adjoining units and install in same manner as original units, with same joint treatment and with no evidence of replacement.

Cleaning: Remove excess grout from exposed paver surfaces; wash and scrub clean. 20-5.11D Payment
Not used.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
21 EROSION CONTROL
Add to section 21-2.02G:

Fertilizer shall have a guaranteed chemical analysis of 10 percent nitrogen, 10 percent phosphoric acid and 10 percent water soluble potash.

Add to section 21-2.03A:

Remove sediment deposits from inside of existing storm drains and culverts shown on the Plans.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 90 Spec No.2021-179
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
22 FINISHING ROADWAY
Add to section 22-1.03:

Upon completion of the work, and prior to requesting final inspection, the work area shall be thoroughly cleaned of all rubbish, construction forms, stakes, excess material, and equipment, and all portions of the work shall be left in a neat and orderly condition. The final inspection will not be made until this has been accomplished. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION IV SUBBASES AND BASES
23 GENERAL
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ 24 STABILIZED SOILS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
25 AGGREGATE SUBBASES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
26 AGGREGATE BASES
Add to section 26-1.02A:

Aggregate base shall be Class 2 3/4" inch maximum.

Aggregate base shall be placed, moisture conditioned, graded, and compacted to the grades or limits shown on the Plans.

Add to section 26-1.02B:

Construction of the new aggregate base shall conform to Section 26 of the Standard Specifications. Grading shall comply with the requirements of Section 19 of the Standard Specifications and these special provisions.

During any grading operations, the Contractor is directed to Section 7, “Legal Relations and Responsibility to the Public”. The Contractor shall protect any items, facilities, or improvements, as necessary, in order to avoid causing damage.

The existing subgrade material below the new aggregate base shall be prepared as described in Section 19 of these special provisions.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
27 CEMENT TREATED BASES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
28 CONCRETE BASES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
29 TREATED PERMEABLE BASES
No Changes

DOWNTOWN STREETSCAPE PROJECT
PHASE II 91 Spec No.2021-179
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
30 RECLAIMED PAVEMENT
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
31–35 RESERVED
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION V SURFACINGS AND PAVEMENTS
36 GENERAL
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
37 BITUMINOUS SEALS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
38 RESERVED
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
39 ASPHALT CONCRETE
Add to section 39-2.01A(1):

Test method Year of publication
AASHTO T322 - Standard Method of Test for Determining the Creep Compliance and Strength of Hot Mix Asphalt (HMA) Using the Indirect Tensile Test Device 2007
AASHTO TP 79 - Standard Method of Test for Determining the Dynamic Modulus and Flow Number for Asphalt Mixtures Using the Asphalt Mixture Performance Tester (AMPT)
2018
ASTM D2172 - Standard Test Methods for Quantitative Extraction of Bitumen from Bituminous Paving Mixtures
2017
ASTM D6433 - Standard Practice for Roads and Parking Lots Pavement Condition Index Surveys
2018
Extraction of Aramid Fibers from Fiber Reinforced Asphalt Concrete – Special Test Method (Attached)
2014
Add to section 39-2.01A(2):
reinforcing fibers: High tensile strength aramid fiber blend specially formulated to reinforce hot mix asphalt. fiber reinforced asphalt concrete (FRAC): A mixture of hot mix asphalt and reinforcing fibers that has greater resistance to rutting, thermal cracking, fatigue cracking, and reflective cracking as compared to conventional non-fiber asphalt mixes.

Aramid Dispersion State Ratio (ADSR): A measure of the dispersion efficiency of the Reinforcing Fibers within

DOWNTOWN STREETSCAPE PROJECT
PHASE II 92 Spec No.2021-179
asphalt mixes. ADSR is calculated by comparing the mass of aramid in the individual state to the total mass of extracted aramid fibers, expressed as a percentage.

Add to section 39-2.01A(3)(b)(i):

5. Representative fiber product sample.

6. Fiber product data sheet and certification from the Manufacturer that the fiber product supplied meets the requirements of this specification.

7. Manufacturer’s instructions and general recommendations.

8. Performance results of ADSR testing from a minimum of three (3) separate laboratory trials to validate Dispersion Efficiency.
a. Perform ADSR test based on modified ASTM D2172 procedures as provided in the document entitled “Extraction of Aramid Fibers from Fiber Reinforced Asphalt Concrete – Special Test Method”. A copy of the modified extraction methodology can be obtained by making an inquiry to the Pavement and Materials Laboratory at Arizona State University at [email protected]. b. To validate ADSR results, average extracted aramid fiber quantity must equal 0.007 percent by total sample weight with no individual result less than 0.005 percent of the total sample weight. c. All tested fiber mixes must achieve a minimum ADSR of 85%.

9. Performance results of Pavement Condition Index (PCI) testing from a minimum of three (3) separate side-byside field trials with a minimum in-service pavement age of four (4) years to validate Cracking Resistance. a. PCI surveys shall be performed according to ASTM D6433. b. Tests results shall include a control and a fiber reinforced pavement section. FRAC mix shall be identical to control mix except for the inclusion of fibers added at the same dosage as proposed on the project.
c. In field performance sections shall be subject to the same environmental and traffic conditions. A minimum surface area of 500 yd2 per FRAC and control section is required. d. PCI results from fiber sections shall show a minimum 10 PCI points greater than the control section after a minimum of 4 years.

10. Performance results of FN testing from a minimum of three (3) separate laboratory trials to validate Rutting Resistance. **NOTE: Testing is NOT required on samples from the job mix, submit previously completed lab testing only.
a. Perform FN tests using the protocol from AASHTO TP79. b. Tests results shall include a control and a fiber reinforced mix. FRAC mix shall be identical to control mix except for the inclusion of fibers added at the same dosage as proposed on the project. c. Results from fiber specimens shall each show an average FN increase of at least 75% over control specimens.

11. Submit a minimum of five (5) public project examples within the State of California with references (name, phone number and email address) where the reinforcing fiber product was used.

All historical test results submitted to validate the fiber’s performance in asphalt mixes shall be from previously completed laboratory and field trials using plant-produced FRAC from a documented source only. Results from labproduced FRAC or FRAC from an undocumented source will not be accepted.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 93 Spec No.2021-179
Fiber dosage rate in all submitted test reports must be equal to the rate proposed for this project. Only testing performed by an AASHTO accredited laboratory or nationally recognized university testing lab will be considered.

Add to section 39-2.01A(4)(b):

In the Engineer's presence and from the same production run, take the following samples:

1. Aramid Dispersion Visual Test: Collect a 10kg sample of mix from the discharge chute during first 50 tons of production. Visually assess the state of aramid fibers in the sample according AASHTO TP79 and rate the sample as “Pass” or “Fail”.
a. “Pass” = All fibers exist in an Individual State and no Undistributed Clips or Agitated Bundles of fiber are detected.
b. “Fail” = One or more Undistributed Clips or Agitated Bundles are detected.

2. If a sample is rated as “Fail”, adjust mixing operations to improve fiber dispersion and repeat Step 1 above.

3. If Visual Test results in three consecutive “Fail” ratings, plant mix samples should be sent to a third party laboratory for complete ADSR testing before production is allowed to commence.

4. In addition to Visual Test, use a shovel to inspect FRAC mix in the back of first three (3) trucks and every tenth truck thereafter to confirm adequate blending of the fiber.

5. Remove any observed fiber bundles from placed mixture and adjust operations per the manufacturer’s recommendation to eliminate future fiber bundle development, and repeat Steps 1 through 3 above to confirm adequate aramid fiber dispersion.

New section 39-2.01B(6) Reinforcing Fibers
Provide a reinforcing fiber blend of Virgin Polyolefins and Virgin Aramids that meets the requirements in the tables below.

Reinforcing Fiber Material Properties
Property Test Method Polyolefin Aramid
Form
Manufacturer
Certification Serrated Monofilament
Nominal Specific Gravity ASTM D276 0.91 1.44
Tensile Strength (psi) ASTM D7269 NA1 400,000
Length (in) Manufacturer
Certification 0.75 0.75
Reinforcing Fiber Performance Properties
Performance Measure Test Method Standard Requirement
Dispersion Efficiency
Aramid Dispersion
State Ratio
(ADSR)
Modified ASTM
D2172 ≥ 85%
Field Performance
Cracking Resistance
Pavement
Condition Index ASTM D6433
≥ 10 PCI Points
Increase,
Minimum 4 Years

DOWNTOWN STREETSCAPE PROJECT
PHASE II 94 Spec No.2021-179
Resistance to Permanent
Deformation (Rutting) Flow Number (FN) AASTHO TP79 ≥ 75% increase Reinforcing fibers shall be FORTA-FI®, provided by the Forta Corporation, or an approved equivalent product and meets the specified submittal, performance and material properties outlined in these Special Provisions.

Replace section 39-2.01B(3) with:

Asphalt binder used in HMA Type A must be Grade PG 64-16.

Replace section 39-2.01B(10) with:

Tack Coat shall be Grade PG 64-16, conforming to the provisions of Sections 39 and 92 of the Standard Specifications and shall be used between layers of each lift of HMA, and on curbs, gutters and construction joints.

Replace the 2nd paragraph in section 39-2.02A(1) with:

Produce and place HMA Type A.

Add to section 39-2.02B(4):

Aggregate used in HMA Type A must comply with the 3/4-inch HMA Types A gradation for initial course.

Aggregate used in HMA Type A must comply with the 1/2-inch HMA Types A gradation for final course.

Add to section 39-2.01B(8)(a):

Deliver fiber-reinforcement in sealed, undamaged containers with labels intact and legible, indicating material name and lot number.

Deliver fiber-reinforcement to location where it will be added to each batch or loaded into the mixer.

Store materials covered and off the ground. Keep sand and dust out of boxes and do not allow boxes to become wet.

Add aramid and polyolefin reinforcing fiber blends at a dosage rate of one (1) pound fiber per one (1) ton of asphalt.

Add alternative aramid fiber blends at a rate proposed by the manufacturer that achieves the ADSR, PCI, and FN results required by Section D.

A fiber manufacturer’s representative shall be on site during mixing and production. This requirement may be waived by the City if fiber manufacturer and asphalt producer can supply evidence of manufacturer’s brand of fiber being successfully produced a minimum of three (3) times at the asphalt plant to be used for the project.

Batch Plant. When a batch plant is used, add fiber to the aggregate in the weigh hopper and increase both dry and wet mixing times. Ensure that the fiber is uniformly distributed before the injection of asphalt cement into the mixture.

Drum Plant: Inject fibers through the RAP collar manually or by feeding them with a metered air blown system to promote rapid and complete fiber dispersion. Rate the feeding of fibers with the rate the plant is producing asphalt mix.

If there is any evidence of fiber bundles at the discharge chute, increase the mixing time and/or temperature or change the angle of the fiber feeder line to increase dry mixing time.

1. Add fibers continuously and in a steady uniform manner. Provide automated proportioning devices and control delivery within ±10% of the mass of the fibers required. Perform an equipment calibration to the satisfaction of the fiber manufacturer’s representative to show that the fiber is being accurately metered and uniformly distributed into the mix.

2. Include the following with the air blown system:
a. Low level indicators

DOWNTOWN STREETSCAPE PROJECT
PHASE II 95 Spec No.2021-179
b. No-flow indicators
c. A printout of feed rate status in pounds/minute
d. A section of transparent pipe in the fiber supply line for observing consistency of flow or feed. e. Manufacturer’s representative’s approval of fiber addition system Replace section 39-2.01C(3)(g) with:

Where shown, place geosynthetic pavement interlayer over a coat of asphalt binder and in compliance with the manufacturer's instructions. Do not place the interlayer on a wet surface. If the interlayer, in compliance with the manufacturer’s instructions, does not require asphalt binder, do not apply asphalt binder before placing the interlayer.

Before placing the interlayer or asphalt binder:

1. Repair cracks 1/4 inch and wider, spalls, and holes in the pavement. This repair is included in the work.

2. Clean the pavement of loose and extraneous material.

If the interlayer requires asphalt binder, immediately before placing the interlayer, apply asphalt binder at a rate specified by the interlayer manufacturer; at 0.25±0.03 gal per square yard of interlayer; or at a rate that just saturates the interlayer; whichever is greater. Apply asphalt binder the width of the interlayer plus 3 inches on each side. At an interlayer overlap, apply asphalt binder on the lower interlayer the same overlap distance as the upper interlayer.

If asphalt binder tracked onto the interlayer or brought to the surface by construction equipment causes interlayer displacement, cover it with a small quantity of HMA.

If the interlayer placement does not require asphalt binder, apply tack coat prior to placing HMA at the application rates specified under section 39-2.01C(3)(f) based on the condition of the underlying surface on which the interlayer was placed.

Align and place the interlayer with no overlapping wrinkles, except a wrinkle that overlaps may remain if it is less than 1/2 inch thick. If the overlapping wrinkle is more than 1/2 inch thick, cut the wrinkle out and overlap the interlayer no more than 2 inches.

Overlap the interlayer borders between 2 to 4 inches. In the direction of paving, overlap the following roll with the preceding roll at any break.

You may use rolling equipment to correct distortions or wrinkles in the interlayer.

Before placing HMA on the interlayer, do not expose the interlayer to:

1. Traffic, except for crossings under traffic control and only after you place a small HMA quantity

2. Sharp turns from construction equipment

3. Damaging elements
Pave HMA on the interlayer during the same work shift. The minimum HMA thickness over the interlayer must be 0.12 foot including at conform tapers.

Add to section 39-2.01B(11):

HMA shall be 1/2-inch Type A.

The minimum asphalt binder content must be 6.0 percent for 1/2-inch aggregate.

Asphalt binder shall be PG 64-16.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 96 Spec No.2021-179
Add to section 39-2.02C:

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.

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.

Ensure the area is clean and dry. All material accumulations which would interfere with the adhesion of the tack coat or with the placing and performance of the HMA shall be removed, including dust, loose aggregate, soil, leaves, and pieces or lumps of other foreign material deposited on the surface.

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 39-2.01C(3)(f) “Tack Coat” of the Standard Specifications.

Before placing HMA, a tack coat shall be furnished and applied uniformly to contact surfaces of all cold pavement joints, curbs, gutters, pavement reinforcing fabric and all existing pavement to be surfaced in conformance with Section 39 of the Standard Specifications.

Tack coat shall be applied to any course in advance of spreading the next course unless the surface temperature is at least 140 °F.

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.

Close areas receiving tack coat to traffic. Do not track tack coat onto pavement surfaces beyond the job site.

Placing HMA shall be done under suitable weather conditions for 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.

Spreading and compacting shall be performed in accordance with Section 39-2.01C and Section 39-2.02C of the Standard Specifications.

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 proofrolling in the presence of the Engineer.

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.

Finish rolling shall be completed before pavement surface temperature is below 150 degrees F.

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.

The completed surfacing shall be true to grade and cross section, of uniform smoothness and texture, compacted firmlyand free from depressions, humps or irregularities.

Dikes shall be shaped and compacted with equipment capable of shaping and compacting the material to the required cross section.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 97 Spec No.2021-179
Add to section 39-3.04:
39-3.04 Cold Planing Asphalt Concrete Pavement
39-3.04A General
Existing asphalt concrete pavement shall be removed by cold-plane methods at the locations and to the dimensions shown on the Plans, including conform grinding. Striping and markings located within cold-plane limits shall be removed with cold planed asphalt concrete. Conform grinding asphalt concrete pavement shall be performed by the cold planing method.

Planing of the asphalt concrete pavement shall not be done by the heater planing method.

Cold planing machines shall be equipped with a cutter head not less than 30 inches in width and shall be operated so as not to produce fumes or smoke. The cold planing machine shall be capable of planing the pavement without requiring the use of a heating device to soften the pavement during or prior to the planing operation.

The depth, width and shape of the cut shall be as indicated on the typical cross-sections, details, or as directed by the Engineer. The final cut shall result in a uniform surface conforming to the typical cross-sections and details. The outside lines of the planed area shall be neat and uniform. Planing asphalt concrete pavement operations shall be performed without damage to the surfacing to remain in place.

Planed widths of pavement shall be continuous except for intersections at cross-streets where the planing shall be carried around the corners and through the conform lines. Following planing operations, a drop-off of more than 0.15-foot will not be allowed at any time between adjacent lanes open to public traffic.

When transverse joints are planed in the pavement at conform lines, no drop-off shall remain between the existing pavement and planed area when the pavement is opened to pubic traffic. If asphalt concrete has not been placed to the level of existing pavement before the pavement is to be opened to public traffic, temporary asphalt concrete tapers shall be constructed. Asphalt concrete for temporary tapers shall be placed to the level of the existing pavement and tapers on a slope of 30:1, or flatter, to the level of the planed area.

Asphalt concrete for temporary tapers shall be commercial quality and may be spread and compacted by any method that will produce a smooth riding surface. Temporary asphalt concrete tapers shall be completely removed, including the removal of all loose material from the underlying surface, before placing the permanent surfacing. Such removed material shall be disposed of outside the highway right-of-way in accordance with the provisions of Section 14-10, “Solid Waste Disposal and Recycling,” of the Standard Specifications.

Operations shall be scheduled such that not more than seven (7) days shall elapse between the time when transverse joints are planed in the pavement at the conform lines and the permanent surfacing is placed at such conform lines.

The material planed from the roadway surface, including material deposited in existing gutters or on the adjacent traveled way, shall be removed and disposed of outside the right-of-way in accordance with the provisions in Section 14-10, “Solid Waste Disposal and Recycling,” of the Standard Specifications. Removal operations of cold-planed material shall be concurrent with planing operations and follow within 50 feet of the planer, unless otherwise directed by the Engineer. A cold planer may not be used for recycling asphalt concrete pavement into aggregate base.

Any concrete rings (i.e., at manholes) within the roadway shall be adjusted to cleanly accommodate new HMA pavement.

Schedule cold planing activities so that not more than 3 days elapses between the time the pavement is cold planed and the HMA is placed.
39-3.04B Materials
Use the same quality of HMA for temporary tapers that is used for the HMA overlay or comply with the specifications for minor HMA in Section 39.
39-3.04C Construction
39-3.04C(1) General
The machine used for planing shall have performed satisfactorily on similar work and shall meet the following requirements herein.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 98 Spec No.2021-179
The planing machine shall be specifically designed and built for the planing of bituminous pavements without the addition of heat.

The machine shall be capable of being operated at speeds of zero to forty feet per minute, it shall be self-propelled, and have the capability of spraying water at the cutting drum to minimize dust. The machine shall be operated in such a way so that no fumes or smoke will be produced. The machine shall be capable of removing the paving material next to curbs or gutters and be designed such that the operator thereof can at all times observe the planing operation without leaving the controls. The machine shall be adjustable for slope and depth and shall be equipped with sonic sensing devices for controlling depth.

Prior to cold planing, all utility facilities shall be lowered to below the grinding planes.

Limits of cold planing are shown on the Plans. The depths and dimensions of the cold planing and edge grinds are designated on the Plans and may vary as required to achieve design finish grades.

Cold planing may require removal of existing asphalt concrete above gutter lips, in addition to the required depth below the gutter lip.

Pavement to be cold planed may contain pavement fabric.

Prior to cold planning, on streets to have a uniform depth of the existing surface removed, all utility covers shall be lowered such that the cutting teeth of the planing machine passes over the adjusted lid without causing damage to the lid or frame.

Contractor will be responsible for maintaining any temporary asphalt fill material over these facilities until the final paving surface is installed. The Contractor shall clearly mark or reference lowered sanitary sewer manholes, storm drain manholes, and water valves in case emergency access is required by the agency responsible for operation of those systems.

All pavement areas designated for removal and replacement shall be cold planed to the full width of the roadway. Pavement against curb faces shall be removed to the full depth designated for that particular section of roadway. If pavement against curb faces cannot be removed by the planing machine, the Contractor shall use other means to remove this material.

If tear-out to the underlying layers occurs during the cold planing operation, the Contractor shall adjust his operation to minimize tear-out. Corrections shall include changing operation speed and replacing cutting teeth. Changes in cold planing depth shall only be made with approval of the Engineer.

Areas torn out by lack of diligence on the Contractor’s part shall be corrected by placement of asphalt concrete conforming to the requirements of these special conditions. Areas torn out due to pre-existing adhesion problems in the existing asphalt concrete shall be corrected at the City’s expense as directed by the Engineer.

Remove cold planed material concurrent with planing activities so that removal does not lag more than 50 feet behind the planer.

During the cold planing operation, the Contractor shall sweep the roadway with mechanical equipment and remove all loosened material from the project site until completion of the removal work.

All material removed shall be considered the property of the Contractor and shall be removed and disposed of in accordance with Section 14-10, “Solid Waste Disposal and Recycling,” and all applicable laws at the Contractor’s expense.

Contractor shall dispose of all asphalt concrete generated from removal or demolition activities on the project at a recycler for these materials. The Contractor shall provide receipts verifying delivery and approximate quantities (in tons) of the material delivered to a material recycler. All other excess materials from the project shall become the property of the Contractor and shall be disposed of by him at his expense.

In addition to removing the cold planned asphalt concrete, the Contractor shall remove any slurry seal or asphalt concrete which is adhered to the top of the adjacent gutter, cross gutter, or spandrel.

The Contractor shall take all necessary measures to avoid the dispersion of dust. Attention is directed to section 18, “Dust Palliatives,” of the Standard Specifications and these special provisions.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 99 Spec No.2021-179
Add to section 39-3.05C:

Asphalt and concrete removal operations shall be performed without damage to any structure or facility that is to remain in place, and the Contractor shall, at his own expense, repair any such damage to the satisfaction of the Engineer.

Where no joint exists between concrete or asphalt concrete to be removed and concrete or asphalt concrete to remain in place, the concrete or asphalt concrete shall be cut in a neat line to a minimum depth of 0.25-foot with a power driven saw before the concrete or asphalt concrete is removed.

Asphalt shall be removed along clean, straight lines and may be cut by any method which will not damage existing pavement, base or subgrade to remain in place. Edges of asphalt broken down during the making of subgrade shall be recut and removed before surfacing material or new asphalt pavement is placed, and no additional compensation will be made therefor. Sections of asphalt outside the lines and limits of removal shown on the Plans or established by the Engineer that are removed, broken or damaged by the action of the Contractor, or through his negligence or operations, shall be replaced by the Contractor at his own expense to the satisfaction of the Engineer.

Striping and markings located within asphalt pavement removal limits shall be removed as part of asphalt concrete removal.

The Contractor shall dispose of all Portland cement concrete and asphalt concrete generated from removal or demolition activities on the project at a recycler for these materials and in accordance with Section 14-10, “Solid Waste Disposal and Recycling,” of the Standard Specifications. The Contractor shall provide receipts verifying delivery and approximate quantities (in tons) of the material delivered to a material recycler. All other excess materials from the project shall become the property of the Contractor and shall be disposed of by him at his expense. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
40 CONCRETE PAVEMENT
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
41 EXISTING CONCRETE PAVEMENT
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
42 GROOVE AND GRIND CONCRETE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
43–44 RESERVED
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION VI STRUCTURES
45 GENERAL
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
46 GROUND ANCHORS AND SOIL NAILS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
47 EARTH RETAINING SYSTEMS
No Changes

DOWNTOWN STREETSCAPE PROJECT
PHASE II 100 Spec No.2021-179
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
48 TEMPORARY STRUCTURES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
49 PILING
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
50 PRESTRESSING CONCRETE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
51 CONCRETE STRUCTURES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
52 REINFORCEMENT
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
53 SHOTCRETE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
54 WATERPROOFING
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
55 STEEL STRUCTURES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
56 OVERHEAD SIGN STRUCTURES, STANDARDS, AND POLES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
57 WOOD AND PLASTIC LUMBER STRUCTURES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
58 SOUND WALLS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
59 STRUCTURAL STEEL COATINGS
No Changes

DOWNTOWN STREETSCAPE PROJECT
PHASE II 101 Spec No.2021-179
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
60 EXISTING STRUCTURES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION VII DRAINAGE
61 GENERAL
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
62-63 RESERVED
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
64 PLASTIC PIPE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
65 CONCRETE PIPE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
66 CORRUGATED METAL PIPE
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
67 STRUCTURAL PLATE CULVERTS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
68 SUBSURFACE DRAINS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
69 OVERSIDE DRAINS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
70 MISCELLANEOUS DRAINAGE FACILITIES
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
71 EXISTING DRAINAGE FACILITIES
Add to section 71-5.03B:

The concrete around all adjusted frames, covers, grates and manholes shall be left one and one-half (1-1/2”) inches lower than the adjacent pavement. The concrete surface shall be tack coated with 0.10 gallons per square yard and paved with ½ inch Type A HMA. Immediately after placement, the surface shall be sand sealed.

The surface adjusted facilities shall be true to the new pavement surface to within one-eighth inch (1/8”) deviation. This

DOWNTOWN STREETSCAPE PROJECT
PHASE II 102 Spec No.2021-179
tolerance shall apply in a single direction only, either up or down. In addition, the adjusted facility shall not vary by the high tolerance on one side and the low tolerance on the other (i.e. the total aggregated tolerance on both sides shall be limited to the 1/8” inch variation). This variation shall apply to the adjacent patch paving around the facility as well such that neither the paving nor the facility vary by more than the stated tolerance. ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

DIVISION VIII MISCELLANEOUS CONSTRUCTION
72 SLOPE PROTECTION
No Changes.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
73 CONCRETE CURBS AND SIDEWALKS
Add to section 73-1.02A:

Flag pole sleeves shall be Schedule 40 PVC pipe.

Replace section 73-1.02B with:

Pedestrian curb ramp detectable warning surface shall consist of raised truncated domes constructed with pedestrian ramps in conformance with the details shown on the Plans and described in these special provisions.

The detectable warning surface shall be Vitrified Polymer Composite (VPC) Cast In Place Detectable/Tactile Warning Surface Tiles, and shall be an epoxy polymer composition with an ultra violet stabilized coating employing aluminum oxide particles in the truncated domes. Detectable warning surface shall be Armor-Tile cast-in-place detectable warning surface or approved equal.

Submit manufacturer’s literature describing products, specifications, installation procedures and routine maintenance. Install in strict accordance with manufacturer’s written installation procedures.

The color of the detectable warning shall be yellow conforming to Federal Standard 595B, Color No. 33538.

The finish surface of the detectable warning surface shall be free from blemishes. No cutting of the tiles will be allowed.

Installation will be per manufacturer’s instructions or as directed by the Engineer.

The manufacturer shall provide a written 5-year warranty for prefabricated detectable warning surfaces, guaranteeing replacement when there is a defect in the dome shape, color, fastness, sound-on-cane acoustic quality, resilience, or attachment. The warranty period shall begin upon final acceptance of the project.

Prior to constructing the cast-in-place detectable warning surface, the Contractor shall demonstrate the ability to produce a detectable warning surface conforming to the details shown on the Plans and these special provisions by constructing a 24" x 24" test panel.

Add before the 1st paragraph in section 73-3.03:

Before placing concrete, verify that forms and site constraints allow the required dimensioning and slopes shown.

Immediately notify the Engineer if you encounter site conditions that will not accommodate the design details.

Modifications ordered by the Engineer are change order work.

Before placing concrete, verify that flag pole sleeves are installed in the locations shown on the Plans.

Replace section 73-4.01C with:

Submit the manufacturer data for the curing and finishing compounds for each type of concrete finish.

Replace section 73-4.01D(1) with:

Installer Qualifications: Engage an experienced Installer who has completed in the last three (3) years at least ten (10) concrete installations similar in material, design, and extent to that indicated for this Project, and whose work has resulted in construction with a record of successful in-service performance. The installer shall be able to document examples of completed work.

DOWNTOWN STREETSCAPE PROJECT
PHASE II 103 Spec No.2021-179
Specifications and recommended practices of American Concrete Institute (ACI), American Society for Testing and Materials (ASTM), and The Uniform Building Code are referred to in this Specification, with their individual designations are to be considered part of this Specification.

Single-Source Responsibility: Obtain each color, type, and variety of concrete, aggregates, sand, joint materials, and other materials, from a single source with resources to provide products and materials of consistent quality in appearance and physical properties without delaying the Work.

Add after the last paragraph in section 73-4.01D(2):

Exposed Aggregate Finish: Provide three different applications of light exposed aggregate to test density. Light exposed aggregate finish shall be similar appearance to light sandblast finish. Use Grace Top-Cast Grades 05 and 15 as required to provide range of densities.

Add after the last paragraph in section 73-4-02:

Welded wire fabric, of a size and type appropriate for use, shall be placed in conformance to the provisions in Section 52, "Reinforcement," of the Standard Specifications.

Curing compound shall be used in conformance to the provisions in Section 90-1.03B(3), "Curing Compound Method," of the Standard Specifications.
73-4.02A Exposed Aggregate Finish
Concrete Surface Set Retarder: Ready-to-use, water-based solution, non-staining, non-corrosive, non-flammable, nontoxic, specifically formulated to retard the set of fresh concrete surfaces to expose the aggregates in the concrete mix.

Surface retarder shall be available in a range of grades to provide the desired level of exposure.

Products & Manufacturers: Subject to compliance with requirements, provide products by one (1) of the following:

Grace Top-Cast Surface Retarder, Grace
or equal.

Provide grade to match approved mockup.

Add after the last paragraph in section 73-4.03:
73-4.03A Exposed Aggregate Finish
Match approved samples, to compare for color, texture, finish, and other characteristics relating to aesthetic effects.

Locate as indicated on plans.

All work shall conform to CAL OSHA /MSDS for application and clean up procedures.

Work shall confirm to manufacturer’s written instructions.

The depth of exposure shall be dependent upon the grade of retarder, concrete mix and surface porosity per the manufacturer’s written instructions.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
74 PUMPING EQUIPMENT AND CONTROLS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
75 MISCELLANEOUS METAL
No Changes

DOWNTOWN STREETSCAPE PROJECT
PHASE II 104 Spec No.2021-179
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
76 WELLS
No Changes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
77 LOCAL INFRASTRUCTURE
Add to section 77:
77-1 SANITARY SEWER SYSTEM
77-1.01 GENERAL
77-1.01A Summary
Section 77-1 includes general specifications for constructing sanitary system components and related items.

Excavation, backfill and shaped bedding must comply with Section 19-3. Work shall be constructed in accordance with these Special Provisions, Standard Specifications, Plans and as directed by the Engineer. Any proposed deviations must first be approved in writing by the City Engineer.

The Contractor shall provide all means necessary, to the satisfaction of the Engineer, to ensure continuous service to all existing customers during and after work hours, weekends and holidays, including the installation of temporary lines and/or temporary pumping equipment. Sewage shall be controlled in a pipeline at all times and flows or leaks in the street or open ditches shall not be allowed.

Paving (permanent and temporary) shall not take place until all underground work is finished, except as otherwise noted, and the Engineer has given written notice of acceptance to the Contractor The Contractor shall provide a full size set of sanitary sewer system "record plans" for their project to the Engineer within 7 calendar days from the final connection to the City's sanitary sewer system. All deviations from the improvement plans shall be recorded on the plans in red ink.
77-1.01B Definitions

NOT USED
77-1.01C Submittals
The Contractor shall submit to the Engineer, in writing, a list of all materials proposed to be used on the project, showing manufacturer's name, product trade name, type, grade, and weight. Materials list shall be submitted and approved before any installation occurs. Supporting documentation and/or samples may be requested to allow the Engineer to make an informed decision on acceptance or rejection of the material.

The Contractor shall provide submittals to the Engineer for all manhole components and their proposed construction prior to the start of the work. Manholes shall be constructed per an accepted submittal and any request and approval for alteration must be made in writing.

The Contractor shall submit evidence of manufacturer's warranty on the product and a certificate showing compliance with applicable ASTM Standards.

All bracing and shoring shall conform to the Division of Industrial Safety Construction Safety Orders. Prior to the excavation of trenches five feet or more in depth, the Contractor shall submit to the City Engineer, a detailed plan prepared by a licensed Civil or Structural Engineer showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of such trenches. A permit must be obtained from the

DOWNTOWN STREETSCAPE PROJECT
PHASE II 105 Spec No.2021-179
State of California, Division of Industrial Safety and shall be submitted to the Engineer prior to starting the trench work. Proof of such permit shall be submitted to the Engineer prior to starting the trench work.

Prior to disposal of any materials or operation of any equipment on sites provided by the Contractor for disposal of excess trench excavation owned by him, the Contractor shall submit to the Engineer written authorization for such disposal of materials and entry permission signed by the owners of the disposal site and the required permits The Contractor shall submit a bypass pumping and/or diversion plan for review by the Engineer at least 10 working days prior to planned commencement of bypass pumping and/or diversion. The Engineer shall approve the bypass pumping plan before commencing any bypass pumping work. The Contractor shall notify the Engineer 2 working days prior to commencing with the bypass pumping operation. The bypass pumping plan shall include design flow, documentation of pump and discharge line capacities, manufacturer, and age. Bypass pumping plan shall also include shop drawings that identify pumping location(s) and methods with sufficient detail to assure that the work can be accomplished without sewage spills.

The plans shall include an emergency discharge response plan to be followed in the event of a failure of the bypass pumping system.

The Contractor shall submit a flow blockage plan, for review by the Engineer, identifying at a minimum the following:

1. What devices and/or material will be used,

1. Depth of upstream manhole(s),

3. Location of existing lateral cleanouts and how they will be monitored,

4. Address of all parcels along with name and operating hours of all businesses located upstream of blockage to the next upstream manhole.

Television inspection reports and video tapes made prior to and after pipe insertion. 77-1.01D Quality Assurance
77-1.01D(1) Contractor Experience
Fusion equipment shall be operated only by technicians who have been certified by the pipe manufacturer or supplier who have a minimum of two (2) years of experience fusion welding 4-inch or larger diameter pipelines. The technician’s experience shall be documented in the HDPE pipe material.

The bidder, or his/her Sub-contractor, shall be properly licensed and trained to perform pipe bursting, having at least 10,000 lineal feet of successful installation in the United States within the last 2 years, in pipelines ranging from 4 to 12 inches.

Documentation of the experience and details of two years minimum training of the on-site foreman and the installers who will perform the actual pipe bursting system, shall be provided with the bid. 77-1.01D(2) Materials
The City reserves the right to reject any material that may be supplied for use. If the City obtains information indicating that a listed item is not performing satisfactorily or is found to be defective, that item will be rejected and the Contractor shall submit a replacement for review at no additional cost to the City.

Any pipe delivered to the job site that, in the opinion of the Engineer, shows signs of contamination, damage and/or defect, may result in the rejection of any pipe that was delivered to the supplier on the same shipment.

Controlled Low Strength Material (if used) must comply with Section 19-3 of the Standard Specifications. 77-1.01D(3) Quality Control
77-1.01D(3)a Testing of Sewer Manholes
Testing of all portions of the sewer including manholes is required, and it's the Contractor's responsibility to coordinate all testing and inspections with the Engineer.

The Contractor, at their option, may conduct testing at any time during construction, however, final inspection and testing for acceptance shall take place only after all sewer facilities have been installed and all trenches backfilled and compacted, including roadway base rock as specified in the Standard Specifications

DOWNTOWN STREETSCAPE PROJECT
PHASE II 106 Spec No.2021-179
Manholes, after all inlets and outlets have been plugged, shall be filled with water to the rim of the frame casting and shall lose no more than 2 inches over a period of 30 minutes.

Even though the test for leakage is within the prescribed limits, the Contractor shall repair any obvious leaks.

In lieu of the water test, testing of sewer manholes may be done by vacuum testing as specified herein. If the vacuum testing method is used, all manholes shall be tested for leakage in accordance with ASTM C 1244-93 as modified herein.

Vacuum testing shall not take place until all paving is complete.

Installation and operation of vacuum equipment and indicating devices must be in accordance with manufacture's recommendations and performance specifications, which must be provided by the manufacturer and approved by the Engineer. The equipment must be capable of testing the entire manhole, including the cast iron frame and grade adjustment rings.

All new or rehabilitated sanitary sewer manholes shall be tested unless otherwise directed by the Engineer. If the manhole fails the test, the manhole shall be repaired and retested at the Contractor's expense.

If manhole joint sealants are compromised during the vacuum test, the manhole must be disassembled and the joint sealants replaced. If there is reason to believe that the manhole has been disturbed after the initial vacuum test, additional tests may be requested by the Engineer and performed at the Contractor's expense.

The Contractor may pre-test manholes at any time during construction. Any pre-test results are solely for the Contractor's use and shall not be accepted as the final test.

Testing shall be done in the following manner:

1. All lift holes and joints shall be grouted and the entire manhole, including grade rings, sealed prior to testing.

2. All pipes entering the manhole shall be temporarily plugged, taking care to securely brace the pipes and plugs to prevent them from being drawn into the manhole.

3. The test head shall be placed in accordance with the manufacturer's recommendations. The test unit shall be braced against the manhole frame and not the grade ring(s) or taper.

4. The vacuum gauge and test equipment used for this test shall be supplied by the Contractor and shall be operated per manufacturer's specifications by qualified personnel. Accuracy and calibration of the gauge shall be certified by a reliable testing firm at six month intervals, or when requested by the Engineer.

5. A vacuum of 10 inches Hg ( 4.91 PS I) of mercury shall be drawn on the manhole, the valve on the vacuum line of the test head closed, and the vacuum pump shut off. The time it takes the indicator gauge to drop from 10 inches Hg (4.91 PSI) to 9 inches Hg (4.4 PSI) shall be measured. The manhole will pass the vacuum test if the time is greater than shown in the following table:

Minimum Test Time Based On 48” Manhole Diameter (sec.)
Manhole Depth in Feet Time in Seconds
0-4 10
4-8 20
8-12 30
12-16 40
16-20 50
20-24 59
24-30 74
After the vacuum test, manholes shall be visually inspected for leaks and defects and repaired as required by the Engineer.
77-1.01D(3)b Testing of Sewer Pipelines

DOWNTOWN STREETSCAPE PROJECT
PHASE II 107 Spec No.2021-179
For either exfiltration or infiltration test on sewer lines, the maximum leakage shall not exceed 250 gallons per inch of pipe diameter per mile per 24 hours as measured over a period of 30 minutes minimum. Should the leakage exceed the maximum allowable rate, the contractor shall repair, overhaul, or rebuild the defective portion of the sewer line to the satisfaction of the Engineer at no additional cost to the City. After repairs have been completed by the Contractor, the line shall be retested as specified above, all at no cost to the City.

In the event that the exfiltration test prescribed above is impractical due to wet trench conditions, these portions of the sewer line where such conditions are encountered will be tested for infiltration. The Engineer shall determine whether the exfiltration or infiltration test will be used.

Low pressure air testing may be used on sewer lines in lieu of water testing at the option of the Contractor. Water testing may still be required by the Engineer for certain installations.

The following procedure shall be used for low pressure air testing:

1. Clean pipe to be tested by propelling a snug fitting inflated rubber ball through the pipe with water. Remove any debris.

2. Plug all pipe outlets with suitable test plugs. Brace each plug securely.

3. If the pipe to be tested is submerged in ground water, insert a pipe probe, by boring or jetting, into the backfill matetial adjacent to the center of the pipe, and detennine the pressure in the probe when air passes slowly through it. This is the back pressure due to ground water submergence over the end of the probe. All gauge pressures in the test should be increased by th.is amount.

4. Add air slowly to the portion of the pipe installation under test until the internal pressure is raised to 5.0 p.s.i.g.

5. Check exposed pipe and plugs for abnonnal leakage by coating with a soap solution. If any leakage is observed, bleed off air and make necessary repairs.

6. After an internal pressure of 5.0 p.s.i.g. is obtained, allow at least two minutes for air temperature to stabilize, adding only the amount of air required to maintain pressure.

7. After the two-minute period, disconnect the air supply and start stopwatch. The pressure of 5.0 p.s.i.g. shall be maintained for 5 minutes.

8. As an alternate, the Contractor may request the air testing procedure as presented in Section 306- 1.4.4 of the 2012 edition of the "Greenbook" Standard Specifications.

After pipe installation and placement and compaction of backfill, but prior to placement of pavement, all PVC pipe shall be cleaned and then mandrel tested for obstructions, such as, but not limited to, deflections, joint offsets and lateral pipe intrusions. A rigid mandrel, as shown on the drawings shall be pulled through the pipe by hand. The minimum length of the circular portion of the mandrel shall be equal to the nominal diameter of the pipe. All obstructions encountered by the mandrel shall be corrected by the Contractor. Obstructions due to deflection shall be corrected by replacement of the over-deflected pipe. Mechanical re-rounding is not permitted.

If a section of pipe fails to meet the mandrel test and is reinstalled and fails the second time, said section(s) of pipe shall be replaced with an approved rigid pipe material.

The contractor shall furnish mandrel as shown on the Standard Drawings.

The Contractor shall retest PVC pipe using a mandrel as shown on the drawings after eleven (11) months of operation.

Any pipe which fails to pass the mandrel test shall be replaced at the expense of the Contractor. The City reserves the right to determine the longitudinal limits of any pipe that is required to be replaced. Pipe replacement shall be guaranteed by the project maintenance bond.
77-1.01D(3)c Television Inspection
Prior to scheduling televising inspection work, all sanitary sewer construction, and any other underground work which, in the opinion of the City Engineer, has the potential to impact sanitary sewer work, shall be installed, their trenches compacted,

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and all other testing and inspections completed and accepted. Final paving over the work shall not take place until all underground work, including television inspection, is completed and accepted by the Engineer.

The Contractor shall hire an independent television inspection service to perform a closed circuit television inspection of all newly constructed sewers lines, including laterals from the main to the cleanout, and if lateral line is a replacement, from cleanout to connection point of the existing lateral.

The Contractor shall notify the Engineer in writing 2 working days in advance of the date for television inspection. The Engineer or their authorized representative shall be given the opportunity to be present during the inspection. Upon receipt of the completed televising inspection digital video files and written logs, the Engineer shall be allowed 10 working days to review the video records and logs before giving written notice of acceptance and/or deficiencies of the lines to the Contractor.

The Contractor shall supply plans and specifications for this work to the televising subcontractor with manhole and mainline cleanout numbers, street names, addresses and any other information required to facilitate the work.

During this inspection, the Contractor or their authorized representative shall be present to observe the televising inspection.

Acceptance of any portion of the sanitary sewer work shall not be given in the field at the time of televising.

The Engineer shall only receive video and written logs for areas not known by the Contractor to need correction. If while conducting the initial television inspection in the field, the General Contractor or their authorized representative discovers areas that need correction, these connections shall be made and the area televised again prior to submitting the logs to the Engineer for review. If footage of video that is not required for inspection, such as; areas known to need repair, stationary video footage in sanitary sewer lines other than where required and footage not of sanitary sewer facilities, the submittal will be rejected.

Any damage to facilities or obstruction to service caused by the televising operations shall be connected immediately by the Contractor at no cost to the City.

The Contractor shall obtain permission from the Engineer prior to the removal of any manmade or natural obstruction needed to complete this work. Any item removed shall be replaced in kind to the satisfaction of the Engineer, and will be done at the Contractor's expense.

All lines shall be flushed clean with a high-pressure commercial sewer flusher unit or by balling prior to televising. If required to televise an existing line it may be necessary to remove roots, grease or other obstructions prior to flushing per these Special Provisions. The equipment shall be appropriate for the type of obstruction being removed and shall not damage the pipe in any way.

All debris shall be trapped at the first downstream manhole and removed. Debris will be hauled to an appropriate disposal site at the Contractor's expense.

After flushing and prior to televising, an approved source of water will be discharged into the upstream manhole or mainline cleanout until water flows out of the downstream manhole. This is to be done no more than 24 hours before the video inspection takes place. High pressure flushing of the line is not to be considered as a substitute for this requirement. This shall be done to insure that all dips or sags are filled before televising, if the sanitary sewer has live flow, the Engineer may waive this requirement. Live flows that are greater than the depth of the gauge shall be temporarily plugged upstream and bypass pumped to allow for proper televising.

The televising of all lines shall be recorded in a digital color format that does not require the use of specialized equipment and/or programs not already in use by the City's Engineering Department. Video files shall be on non-rewritable DVD disc(s) or flash drive(s), and shall be delivered to the Engineer along with computer program generated written inspection logs. The video files and written logs shall become the property of the City of Ukiah. Every televised run (manhole to manhole, manhole to mainline cleanout, and laterals) shall be recorded as a separate video file, with the name of the file being the manhole and/or mainline cleanout numbers for the main, and the property address for the lateral. A lateral file shall consist of the run from the clean out to the connection at the main and the run from the clean out to the connection of the existing lateral.

A pan and tilt color camera shall be used for all video inspection of main lines and shall be one specifically designed and constructed for such inspections. The camera shall be mounted on adjustable skids, a tractor, or when approved by the

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Engineer, a raft to keep it in the center of the pipe. Lighting for the camera shall be supplied by a lamp on the camera, capable of being dimmed or brightened remotely from the control panel. The lighting system shall be capable of lighting the entire periphery of the pipe. The camera shall be operative in 100% humidity conditions and shall have a minimum of 330 lines of resolution. The camera equipment shall produce a continuously monitored color picture, which will have the resolution capability to discern small hairline cracks and other minor and major defects in the sanitary sewer line. The camera equipment shall be capable of producing digital still pictures for permanent record as required. The camera shall be self-propelled or pulled by a cable winch from the downstream manhole, through the line along the axis of the pipe, at a uniform rate of l/2 foot per second maximum.

Where infiltration in the sanitary sewer line is suspected, the camera shall be stopped for at least 30 seconds in the area of question and the camera shall pan and/or tilt as needed to ascertain that infiltration is occurring and the possible cause. The camera shall stop at all lateral connections, defects, sags, etc. for a period of at least 10 seconds and the camera shall pan and/or tilt as needed so that all portions of the connection or defect that is visible from with.in the main line can be completely inspected.

Each pipe run between manholes being inspected may be required to be isolated from the remainder of the line by the use of a line plug to insure total viewing of the inside periphery of the pipe. The inspection shall be performed in a forward and/or backward direction according to line conditions at the time of the inspection. Every effort shall be made by the Contractor to televise in the same direction as the flow, especially during live flow conditions. The Engineer must approve any video inspection that goes against the flow.

Televising subcontractor personnel shall be in constant communication during the televising operation.

The Contractor shall keep a copy of the written logs on site that clearly show the exact location, in relation to the starting manhole/mainline cleanout or lateral cleanout, of each following item discovered during the television inspection; infiltration points, lateral locations, cracks, open/pulled joints, roots, broken or collapsed sections, grease, debris, location of dips (starting and ending footage plus depth), and any other discernible features. In addition to the items noted, the video and written logs shall also note; name of project, general contractor, date, line size, length of section, manhole condition and live flow. Measurement for location of defects shall be at ground level by means of a metering device. Markings on the cable, or the like, which would require interpolation for depth of manhole or lateral cleanout will not be allowed. Measurement meters will be accurate to plus or minus one foot in a thousand and must show on video. A one-inch depth gauge pulled or pushed in front of the camera is required for all main lines up to and including 12 inch. For any line larger the Contractor shall verify required gauge size with the Engineer prior to scheduling television inspection. Measurement of laterals must be recorded on video and written log from bottom of cleanout to main and bottom of cleanout to connection at existing lateral.

The following conditions shall exist prior to the television inspection:

1. All sewer lines shall be in installed, backfilled and compacted;

2. All structures shall be in place, all channeling complete and all pipelines accessible from structures;

3. All other underground facilities, utility piping and conduit within two feet of the sewer main, shall be installed, backfilled and compacted;

4. Pipelines to be video inspected shall have been flushed, and all other testing completed and accepted, including the mandrel test;

5. Immediately before the television inspection, turn fresh water into the sewer until it passes through the downstream manhole.

All work performed must meet the quality and clarity standards set by the City of Ukiah and is subject to City review and rejection.

Deficiencies revealed by the television inspection, in the opinion of the Engineer, shall be repaired by the Contractor to the satisfaction of the Engineer. After all required repairs are completed the areas of repair shall be televised again at the Contractor's expense.

The Contractor shall be notified in writing of any deficiencies revealed by the television inspection that will require repair, following which, the Contractor shall excavate and make the necessary repairs and perform a television re-inspection.

Television re-inspection shall be at the Contractor's expense.

Although the final determination for required repairs will be made by the Engineer, the following observations are typical defects found in the construction of the sewer pipelines and will require corrections prior to acceptance whether or not there is a passing air test:

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1. Off grade - deviation "down" from grade (sag) of 1" or more, unless otherwise allowed on mains larger than 12" in diameter. Any sag in the line greater than 15 linear feet, unless otherwise approved on specific installations. Any deviation "up" from grade, unless coming out of sag of less than 1" deep;

2. Separations in mainline pipe joints connected by a coupling shall be no more than l" in length on mainline sizes of 12" or smaller, and no more than 2" on trunks 15" or larger;

3. Separations over l/2" in lateral pipes connected by a coupling;

4. Any bell & spigot joint not installed per the pipe manufacturer's installation recommendations;

5. Offset joints;

6. Chips in pipe ends - none more than 1/4" deep;

7. Cracked or damaged pipe or evidence of the presence of an external object bea1ing upon the pipe (rocks, roots, etc.);

8. Infiltration;

9. Debris or other foreign objects;

10. Other obvious deficiencies when compared to Approved Plans and Specifications, these Standards and Standard Drawings.

The above list is not a complete list of items that may be considered as deficiencies. The final determination for any required repair shall be made by the Engineer.
77-1.02 MATERIALS
The City reserves the right to reject any material that may be supplied for use. If the City obtains information indicating that a listed item is not performing satisfactorily or is found to be defective, that item will be rejected and the Contractor shall submit a replacement for review at no additional cost to the City.

Any pipe that is delivered to the job site that, in the opinion of the Engineer, shows signs of contamination, damage and/or defect, may result in the rejection of any pipe that was delivered to the supplier on the same shipment.

The pipe manufacturer shall legibly mark pipe materials. Name and/or trademark of manufacturer, nominal pipe size and manufacturing standard reference number shall be printed on the pipe at 3 foot-intervals or less.

Pipe sizes for pipes other than High Density Polyethylene (HDPE) are nominal inside diameter (ID) unless otherwise noted.

Pipe sizes for HDPE pipes are specified by outer diameter (OD).

The Contractor shall use a single manufacturer for pipe, fittings, manhole components, lateral cleanout plug unless otherwise approved by the Engineer.

All materials delivered to the job site shall be new and free from defects. 77-1.02A Polyvinyl Chloride (PVC) Pipe
Sewer pipe shall be SDR 26 polyvinyl chloride (PVC) pipe PVC solid wall sewer pipe and fittings for gravity sewers shall be made from all new, rigid, unplasticized polyvinyl chloride in accordance with AWWA C900, ASTM D-3034 and ASTM F-679 and shall have a minimum pipe stiffness of 46 psi. Joints shall be gasketed and conform to the requirements of ASTM D-3212 and ASTM F-477.

Individual pipe lengths shall not exceed twenty (20) feet in length.

All pipe shall have a manufacturer marked insertion line to indicate proper insertion of the spigot into the bell when the joint is made. Bevel and lubricate all field cut PVC pipe per manufacturer's instructions before joining. Where field cutting of pipe removes the manufacturer's insertion line, the cut pipe shall be remarked per manufacturer instructions prior to installation.

All pipe, fittings, gaskets, joint lubricants and cements/solvents shall be supplied by the manufacturer and installed per the manufacturer’s specifications and recommendations. Pipe joints that are not installed per manufacturer's instructions may be required to be removed and relayed at the discretion of the engineer.

All PVC pipe entering or leaving a concrete structure shall have an approved manhole gasket firmly fitted around the pipe exterior and cast into the structure base or near the structure wall center as a water stop.

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77-1.02B HDPE
77-1.02B(1) HDPE Pipe and fittings
High Density Polyethylene (HDPE) pipe is permitted for sewer lateral rehabilitation projects installed by pipe bursting. HDPE pipe is not permitted for gravity sewer installed by open cut.

Pipe-bursting may be used for lateral rehabilitation/ replacement and shall conform to the latest editions of the UPC (IAPMO IS 26-2003) and the following requirements.

Pipe sizes for HDPE on the Plans are specified by outer diameter (OD). All pipe shall be made from virgin grade material Only HDPE SDR 17 shall be used for pipe-bursting applications. Butt-fusion joints are not permitted.

Connections to existing laterals shall be made with a watertight non-shear coupling.

HDPE pipe shall be made to diameter and tolerances in accordance with ASTM D 3035. . The pipe shall be of the diameter as shown on the plans and furnished complete with all fittings, and other appurtenances as necessary for a complete and functional system.

Pipe and fittings shall be made in conformance with ASTM F 714 and ASTM D 3261 as modified for the specified material.

The pipe shall contain no recycled compound except that generated in the manufacturer's own plant from resin of the same specification from the same raw material pipe
All HDPE pipes to be used shall not be black or any dark color in the interior. The inner wall shall be white, light green or natural. The outer wall shall be black, light green or natural. Orange, red, magenta or blue color are not acceptable.

Pipe shall be marked at 3-foot intervals or less with the manufacturer’s name (or trade mark), the designation ASTM D3350 and ASTM 714, including the year of issue, the letters “PE” followed by the cell classification number of the raw material compound used, the nominal pipe size in inches, the dimensional ratio, and the manufacturer’s code identifying the resin manufacturer, lot number, and date of manufacture. Pipe shall be color identified by stripes, a color shell, or solid color.

Fittings shall be marked with the following: ASTM D3261 (Butt type); manufacturer’s name or trademark; material designation; date of manufacture or manufacturing code; size (including the sizing system used, such as IPS, CTS or OD). Where the fitting size does not allow complete marking, marking may be omitted in the following sequence: size, date of manufacture, material designation, manufacturer’s name and trademark.

The pipes shall be stored and handled in accordance with the manufacturer’s recommendations and shall be less than two (2) years old at the time of installation.

Pipe and fittings shall be homogeneous throughout and free of serious abrasion, cutting, or gouging of the outside surface extending to more than 10 percent of the wall thickness in depth. The pipe and fittings shall be free of cracks, kinking (generally due to excessive or abrupt bending), flattening, holes, blisters or other injurious defects 77-1.03 CONSRUCTION
77-1.03A General
The Contractor shall provide the equipment, materials and personnel to maintain continuous sanitary sewer service to all customers, 24 hours a day and 7 days a week during construction, including but not limited to the installation of temporary lines and pumping equipment at no additional cost to the City unless otherwise specified. Any deviation from this requirement must first be approved by the Engineer.

Where ground water occurs, pumping shall continue until back filling has progressed to a sufficient height to prevent flotation of the pipe. Water shall be disposed of in such a manner as to cause no property damage or not be a hazard to public health.

Any proposed temporary main connection that may be in place longer than 24 hours, shall be submitted to the Engineer for approval prior to installation.

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Both new and existing mains shall have the ability to be accessed individually for maintenance and emergency response by City personnel at all times. All temporary connection material shall be fully removed after its intended use. 77-1.03B Excavation
Excavation, backfill and shaped bedding must comply Standard Drawing No. 220, “Trench Detail Service Lateral/ Sewer Main” and Section 19-3 of these Special Provisions.

Trench resurfacing shall conform to Standard Drawing No. 220, “Trench Detail Service Lateral/ Sewer Main” and the Standard Specifications.

If existing utility crossings or other potential conflicts are shown on the plans or specified in other contract documents, the Contractor shall pot hole said areas as well as proposed connection points to the City's sanitary sewer system prior to the start of pipe laying. If conflicts are discovered during this investigation the Engineer shall be notified immediately.

It is the Contactor's responsibility to ensure that sewer components are laid and bedded on sound, stable material. All existing material that has been disturbed shall be removed from the trench prior to installation of new material. The Contractor shall promptly notify the Engineer of any field conditions that may affect alignment and/or grade.

Abandoned utilities found to reside in a common trench with sewer components shall be removed and disposed of prior to the installation of any new sewer facility unless otherwise directed by the Engineer. Any exposed pipe ends on abandoned lines that remain shall be plugged with Controlled Low Strength Material.

All excavations shall be able to accommodate equipment and personnel required for backfilling and compaction testing. If, in the opinion of the Engineer, typical compaction methods cannot be used, the Engineer may require the use of a pneumatic Pogo Stick/Powder Puff type compactor at no additional cost to the City. Excavations around new and existing manholes shall be a minimum of 24 inches wider than the outside of the barrel section.

Blasting shall not be permitted unless first approved of, in writing, by the City of Ukiah.

Controlled low-strength material shall be placed at the locations shown on the plans and where cover is less than 3 feet, unless otherwise specified herein, on the plans, or approved by the City of Ukiah. Controlled low-strength material shall conform to Section 19, 19-3.02G “Controlled low-strength material”, and a material submittal is required for approval. All excavations in a traveled way with controlled low strength material backfill shall be plated or otherwise safely covered to allow for safe passage during curing.

All stumps and large roots encountered during trenching operations shall be removed to the satisfaction of the Engineer.

Trenching operations shall be conducted in such a manner that will not disturb existing facilities. The Contractor shall incur all costs associated with repairs needed, in the opinion of and to the satisfaction of the Engineer, by any such damage due to their operations.

The trench shall be opened sufficiently ahead of the pipe laying operations to reveal obstructions. Trench crossings shall be provided as necessary to accommodate public travel and to provide convenient access to adjacent properties. Flow shall be maintained in any sanitary sewers, storm drains, water lines, or water courses encountered in trenching.

Cutting of Asbestos Cement Pipe (ACP) shall be done utilizing a Pipe Cutter (snapper), of the proper type and size for the intended use. A ratcheting hand snapper shall only be used on ACP sizes of 6 inch and smaller. The "snapper", and all appurtenances shall have been inspected by the Contractor to ensure that it is in good working order prior to use.

If field conditions require an alternative method for cutting the ACP, the alternative method shall comply with all laws and requirements as specified by OSHA, the Contractor's State Licensing Board, and any other governing body for this type of work. All related disposal costs shall be borne by the Contractor.

In all cases, cutting, handling and disposal shall be done per the governing bodies. Cut pipe shall be properly enclosed as soon as possible after removed from the trench.

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Unless otherwise specified, excess material from excavation shall become the property of the Contractor and shall be disposed of to the satisfaction of the Engineer. The excess material shall be removed from the site daily unless it has been preapproved for reuse.

All excavated material shall be removed from the jobsite at the end of each day unless otherwise approved by the Engineer.

Five days prior to cutting into any traffic detector loop the Contractor shall notify and coordinate with the Engineer. 77-1.03C Trench Bracing and Shoring
All bracing and shoring shall conform to the Division of Industrial Safety Construction Safety Orders. Prior to the excavation of trenches five feet or more in depth, the Contractor shall submit to the City Engineer, a detailed plan prepared by a licensed Civil or Structural Engineer showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of such trenches. A permit must be obtained from the State of California, Division of Industrial Safety and shall be submitted to the Engineer prior to starting the trench work.

The Contractor shall take all necessary measures to protect the workers and adjacent areas and structures from the hazards of the trenching or excavation operations.

Trench sheeting or boxes shall be withdrawn in such a manner as to prevent caving at the walls of excavations or damage to piping or other structures. Sheeting shall be completely removed from the trench and no backfill shall be installed against the sheeting before it is removed.

Trenching operations shall be conducted in such a manner that will not disturb the existing curb, gutter and existing utilities that are to remain in place.
77-1.03D Pipe Laying
Prior to start of pipe laying, the Contractor shall expose the end(s) of existing main(s) to determine individual lines and grades. New mains shall begin eight (8) feet from and on the same line and grade as the existing main. New mains shall be installed at minimum standard cover conforming to the requirements of the City Water System Design Standards, or as shown on the plans.

Where construction consists of constructing a new main or extension of an existing main, the downstream end of the new main shall be securely closed with a tight fitting plug until the construction is accepted by the Engineer.

Sewer pipe shall be installed on the alignment and grade as shown on the plans and in accordance with Special Provisions and the Standard Specifications, or as directed by the Engineer. Existing sewer laterals shall be removed and replaced at the locations shown on the plans, or as directed by the Engineer.

Sewer pipe shall be laid in straight lines and on uniform rates of grade between points where changes in alignment or grade are shown on the plans. The interior of the pipe shall be free of foreign matter before lowering into the trench.

If proper separation between new sewer lines and water mains, per the latest guidelines from the California State Water Resources Control Board cannot be maintained, the Contractor shall inform the Engineer immediately to get direction.

The pipe manufacturer's written instructions covering the installation of their pipe, and any related materials, shall be closely followed unless otherwise directed or approved in writing by the Engineer. The trench shall not be backfilled until authorized by the Engineer. Pipe laying shall proceed upgrade with the spigots pointing in direction of flow. The invert of the pipe shall be set at required line and grade as determined from batter boards set not over 25 feet apart.

Electro-optical grade setting devices may be used provided that the device will be operated by a person proficient in its operation.

Any section of pipe found to be defective or which has had grade or joints disturbed shall be re-laid by the Contractor at their expense.

Proper implements, tools and facilities satisfactory to the Engineer shall be provided and used by the Contractor for the safe and efficient execution of the work. All pipe, fittings and accessories shall be carefully lowered into the trench by means of

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derrick, ropes, or other suitable equipment in such a manner as to prevent damage to pipe and fittings. Under no circumstances shall pipe or accessories be dropped or dumped into the trench. The pipe and accessories shall be inspected for visible defects prior to lowering into trench. Any visibly defective or unsound pipe shall be replaced.

The line and grade of existing utilities shall not be altered. Any leakage caused in existing utilities by reason of the Contractor's operations shall be immediately repaired at the Contractor's expense.

Existing storm drains shall be supported or removed and replaced at the Contractor's option and at no additional cost to the City. In any case, the Contractor shall be responsible for maintaining the existing line and grade of the storm drains. If the Contractor elects to remove and replace, it shall be done in conformance with all applicable Special Provisions, Standard Specifications and to the satisfaction of the Engineer.

Existing water lines shall be supported in place with service maintained during construction. The Contractor shall be responsible for any damage to the water lines during construction and any damage resulting from improper backfilling.

Existing sewer lines shall be supported in place with service maintained during construction. The Contractor may, at their option, remove and replace any sewer laterals which are not in use during construction. The Contractor shall be responsible for damage to sewer lines during construction and any damage resulting from improper backfilling.

Sewer lateral inverts shall be set above the midpoint of the sewer main unless otherwise directed by the Engineer in writing.

Any lateral invert installed below the midpoint of the main without prior written approval shall be replaced and the lateral relayed at the Contractor's expense.

Any temporary connections between new and existing sewer mains and/or manholes required for the progress of work shall be made with approved rigid piping and sheer band and/or gasketed couplings. If bends are required to make the connection, the bends shall be long radius bends unless otherwise approved. 77-1.03E Sewer Laterals
The estimated locations of the existing laterals that are shown on the Plans are based on record information, television inspection, and field evidence. This information is available for review upon request. The City assumes no responsibility for the accuracy of this information or the inadvertent omission of any such information. Not all existing sewer laterals are guaranteed to be located through these means, the Contractor may, therefore encounter sewer laterals not shown on the Plans.

The Contractor shall have the sole responsibility for determining the exact location for all existing laterals. During sewer mainline construction but prior to the installation of each individual new sewer wye on the main, the Contractor shall determine the exact location of the existing sewer lateral 1 ft from the building property boundary. The acceptable method for locating a sewer lateral at the back of sidewalk is to insert a metallic electrician's "fish tape" into the existing lateral pipe after the pipe is exposed during sewer main excavation and tracing the "fish tape" to the back of sidewalk using a pipe and cable metal locator.

The Contractor shall confirm the current alignment with the Engineer. If the existing alignment and grades are acceptable, the pipe shall be constructed via use of a trenchless method approved by the Engineer. If not acceptable the new sewer lateral shall be installed via open cut trench or other method approved by the Engineer.

Typically, each active sewer lateral found to exist shall be replaced, unless specifically deleted by the Engineer. If a sewer lateral shown to be replaced appears to be inactive the Contractor shall notify the Engineer and then attempt to verify their conclusion.

Sewer laterals already constructed and parallel to the existing main sanitary sewer line may be constructed by use of a trenchless method approved by the Engineer, unless otherwise specified. New pipe constructed by trenchless methods shall maintain a thirty inch (30”) minimum clearance for parallel utilities, sixty inch (60”) for parallel high risk utilities, and a twelve inch (12’) minimum vertical clearance for perpendicular (or crossing) utilities. Sewer laterals not already constructed parallel to the existing main sanitary sewer line may be constructed via open cut methods.

Due to the hazards associated with pipe-bursting near natural gas lines, all natural gas lines, including but not limited to distribution mains, transmission mains, and service lines, marked within four feet (4’) of the existing sewer main, shall be uncovered (pot-holed) to confirm the required clearance exists. If the existing gas line is installed parallel and within

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four feet (4’) horizontally to the existing sewer main, the gas line shall be uncovered a minimum of once every onehundred (100) feet along the length of the sewer main.

Boreholes shall be only large enough to allow for the size of pipe to be installed. If the Contractor's operations disturb the supporting soil, the Engineer may require the removal and replacement of any undermined curb, gutter or culvert; and/or the use of controlled low-strength material backfill at the Contractor's expense. The limits of the curb and gutter replacement and any required dowelling will be at the discretion of the Engineer at the Contractor's expense.

Excavation of launch pits shall be situated to provide minimum inconvenience to residents, businesses or traffic. Launch pits shall not be located in private property without permission of the homeowner and engineer.

A sump hole in the base of excavations may be required to allow for pumping of water from the excavation.

Sewer laterals shall be replaced at the locations shown on the Plans and in accordance with City Standards. The sewer lateral shall be replaced up to the location indicated on the Plans. Connections to existing laterals shall be located 1 ft from the property boundary.

All sewer laterals shall be installed perpendicular to the main sanitary sewer line unless otherwise shown on the Plans or approved by the Engineer.

Any change in alignment shall be accomplished using long radius bends. Any use of short bends in this area must first be approved by the City.

After the pipe has been installed, allow pipe manufacturer’s recommended amount of time, but not less than four (4) hours, for cooling and relaxation due to tensile stressing prior to reconnecting to the lateral or sewer.

Any lateral that is not installed perpendicular to the curb shall tracer wire installed in the following manner:

1. Wrap wire two times around wye connection at main and secure.

2. Lay both ends on top of and along the lateral to the cleanout and up the cleanout riser. Both ends of wire shall extend approximately 6 inches beyond riser.

3. Secure wire to top of lateral pipe at approximately 5 foot intervals. Ends of wire must be easily accessible inside the cleanout box.

For tracer wire specifications see Sanitary Sewer System Design Standards.

Connections to existing laterals shall be made as shown on the Project Plans 1-ft from the property boundary unless otherwise specified herein or depicted on the Project Plans.

Active sewer laterals are to remain in service at all times, to facilitate this when removing and replacing an existing main the Contractor shall install a temporary connection between the new wye and the existing lateral until the new sewer lateral is constructed.

Plastic flex pipe may be used for temporary connections between active existing sewer laterals and the new wyes on the main. The flex pipe shall be the same size as the existing lateral pipe and shall be connected to the new wye and the existing lateral by means of an approved flexible sewer coupling. Squeezing the flex pipe and inserting it into the cut end of the existing lateral or into the lateral opening of the wye will not be allowed. All temporary connection material shall be removed from the trench prior to final compaction.

Temporary sewer lateral connections shall be replaced with permanent laterals after installation of the sewer mainline is completed for each block, or at a maximum of 20 calendar days, whichever is sooner.

Provide 1-foot minimum clearance between wyes on all sewer mains as measured between adjacent bell ends.

Sewer wyes installed at incorrect locations shall be removed and replaced with a 4-foot minimum length of pipe and approved couplings. Capping of wyes installed at incorrect locations will not be allowed. Prior to installing wyes on the main, the Contractor shall investigate to ensure that the proposed alignment of new laterals will not be in conflict with any other facilities, existing or proposed. The Contractor shall promptly notify the Engineer of any field conditions that prohibit installing the wye in accordance with City Specifications and/or Standards.

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A minimum separation of 3 feet shall exist between new sewer laterals and existing water services. If this separation requirement cannot be met the Contractor shall notify the Engineer immediately for direction prior to continuing work on this lateral. In all cases, a minimum of 5 feet separation is required between new sewer laterals and new water services.

If open cut construction is required to realign an existing sewer lateral, the Contractor shall remove and replace existing sidewalk and concrete planter strips for the installation of sewer laterals to the nearest transverse score mark on both sides of the lateral. All concrete removed shall be backfilled and compacted level with temporary asphalt concrete or covered with I inch thick plywood, laid flat with ADA compliant tapers on both ends.

Where an excavation for a new sewer lateral occurs within the drip line of any tree the Contractor shall hand dig to protect tree roots as directed by the Engineer. Root pruning shall be done only when directed by the Engineer and shall be accomplished by use of sharp tools appropriate for the size of the root to be cut. Each cut shall be clean with no bark or splintered wood remaining on the root. At no time shall roots be pulled on by excavating equipment.

Existing irrigation facilities not shown on the plans may be encountered during sewer lateral installation. The Contractor shall repair any damage to existing irrigation facilities caused by their operations.

The Contractor shall notify and coordinate the replacement of individual sewer laterals with the effected resident or business. 77-1.03F Bypass Pumping and/or Diversion System
When bypass pumping and/or flow diversion is required to keep existing services active, the Contractor shall provide a system that furnishes and maintains all personnel, equipment, tools, power, piping and incidentals required to maintain existing sewer flows and services without interruption.

The Contractor shall submit a bypass pumping and/or diversion plan for review by the Engineer at least 10 working days prior to planned commencement of bypass pumping and/or diversion. The Engineer shall approve the bypass pumping plan before commencing any bypass pumping work. The Contractor shall notify the Engineer 2 working days prior to commencing with the bypass pumping operation.

Any proposed flow diversion plan that includes a temporary connection to existing sewer components shall also comply with other requirements stated herein.

The bypass pumping plan shall include design flow, documentation of pump and discharge line capacities, manufacturer, and age. Bypass pumping plan shall also include shop drawings that identify pumping location(s) and methods with sufficient detail to assure that the work can be accomplished without sewage spills. The plans shall include an emergency discharge response plan to be followed in the event of a failure of the bypass pumping system.

All components of the bypass pumping system shall be sound attenuated and produce noise emissions in accordance with City noise ordinances. All pumps shall be set into or surrounded by spill containment devices.

Bypass pumping shall be done in such a manner as not to damage private or public property or create a nuisance or public menace. The pumped sewage shall be in an enclosed hose or pipe system that is adequately protected from traffic and shall be redirected into the sewer system.

The Contractor shall take all necessary precautions including constant monitoring of bypass pumping to ensure that no private residences or properties are subjected to sewage backup or spills. Dumping, leaks or free flow of sewage onto private property, gutters, streets, sidewalks, or into storm sewers or waterways is strictly prohibited.

Except as otherwise specified herein for testing purposes, the Contactor must receive written approval from the Engineer prior to the use of pneumatic test plugs or any other means for blocking sewer flows. The Contractor shall submit a flow blockage plan, for review by the Engineer, identifying at a minimum the following:

1. What devices and/or material will be used,

2. Depth of upstream manhole(s),

3. Location of existing lateral cleanouts and how they will be monitored,

4. Address of all parcels along with name and operating hours of all businesses located upstream of blockage to the next upstream manhole.

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The Contractor shall also provide name and cell phone number of the employee(s) that will have the sole duty of monitoring all active blockages. If multiple lines are simultaneously blocked, the Contractor's submittal must show how each blockage is to be continuously monitored. For multiple blockages, and at no additional cost to the City, the Engineer may also require devices for each blockage to give audible and/or visual ala1m of a pending overflow.

The Contractor shall be liable for all cleanup, damages and resultant fines in the event of a spill.

Subsequent to removal of bypass pumping and/or diversion system, the Contractor shall verify existing sewer flows are restored to pre-existing condition.

The Contractor shall allow up to 10 working days for response from the City for any request regarding sewer system flows. 77-1.03G Sewer Structures
All active manholes shall be considered as confined spaces.

Manholes shall be constructed per an accepted submittal and any request and approval for alteration must be in writing.

Manholes shall be standard precast concrete manholes as detailed on City Standard 401.

Manhole bases may be poured-in-place concrete on undisturbed earth. The bases shall be poured full thickness against the side of the manhole excavation or to dimensions shown on City Standard 401. The manhole excavation site shall be dewatered before pouring.

Pre-cast manhole bases, conforming to City Standard 401 in dimensions and the requirements outlined below for materials may be used. Such pre-cast bases shall be placed on a minimum 6- inch-thick cushion of drain rock. The drain rock shall extend a minimum of 6 inches beyond the outside edges of the base.

Precast manhole bases shall be constructed per ASTM C478. Concrete for cast-in-place manhole bases shall be Portland cement concrete in compliance with Section 90 of the Standard Specifications If a new manhole is to be installed on an existing asbestos cement main, the Contractor shall remove all asbestos cement piping to a minimum of 12 inches beyond the manhole trench and into the mainline trench, any visible joints up to 36 inches beyond the manhole trench shall also be removed. All replacement materials shall be per City Standards, and all removed asbestos cement material shall be disposed of in accordance with all laws and regulations.

Except as noted below, or where otherwise specified, all manholes regardless of diameter shall have concentric tapered sections.

Eccentric tapered sections shall be installed when the installation of an inside drop is required. Where a manhole has a single drop structure the opening of the eccentric tapered section shall be directly over the drop. When multiple drops are required, the alignment of the opening shall be determined by the City Engineer.

Where the constructed height of a precast base does not allow for the installation of a tapered section due to rim to invert elevation constraints, the Contractor shall submit for a cast-in-place base for review. Slab sections shall only be considered where the height of a cast-in-place base will not allow for the installation of a tapered section.

Where steel reinforcement is required in manhole base construction, such reinforcement shall be furnished and placed as shown on the plans and in accordance with the applicable provisions of Section 52 of the Standard Specifications.

The base slab and initial riser section shall be connected with integrally poured concrete to create a watertight joint. Flow channels shall be constructed as shown on the plans. Changes in size and/or grade shall be made gradually in constructed channels, and changes in direction shall have smooth curves with proper radiuses that direct flow toward the outlet pipe and minimizes turbulence. All finished surfaces shall be smoothly troweled with a steel trowel. All manhole barrels and taper section shall be precast concrete sections using Type V Portland cement complying with ASTM Designation: C 150 or lowalkali Type II cement meeting the requirements for Type V cement.

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The 48-inch diameter barrels and taper sections shall be constructed in accordance with the applicable provisions of ASTM Designation: C 478 and shall be inspected by the Engineer to determine that the interior surfaces are smooth and free of pockets or depressions.

Manhole frames and covers shall be EJ 24” Black Composite Water Resistant Manhole Cover and Frame with two (2) Stainless Steel Titus Twistlift Security Lock System with “Sanitary Sewer” imprinted. Tops of manhole frames and covers shall be set accurately to finished grade in paved streets and 1 foot above finished grade in unimproved areas.

The frames shall be evenly set on the manhole on a Portland cement mortar bed. Where manholes are set above finished grade, the earth shall be mounded up around the manhole in a neat and acceptable manner to the satisfaction of the Engineer.

The entire interior surface of all new manholes, and existing manhole being connected to, shall be coated including the flow channel down to the spring line after all cracks and/or chips have been patched and existing surfaces prepared. Xypex concrete waterproofing coating (or approved equivalent) shall be applied to the entire interior of all sewer manholes. Coating and patching materials shall be submitted to the City for approval and shall be applied in accordance with the manufacturer's recommendations
Each manhole shall be sealed with an external rubber sleeve similar to the Infi-Shield Gator Wrap as manufactured by Sealing Systems, Inc. (763-478-2057) or approved equivalent. The seal shall be made of a Stretchable, Self-Shrinking, Intra-Curing Halogenated Based Rubber with a minimum thickness of 30 mils. The back side of each unit shall be coated with a cross-linked re-enforced butyl adhesive. The butyl adhesive shall be non-hardening sealant, with a minimum thickness of 30 mils. The seal shall be designed to stretch around the substrate then overlapped creating a cross-link and fused bond between the rubber and butyl adhesive. The application shall form a continuous rubber seal that applies inward pressure on the protected area for the life of the application. The butyl adhesive and the inward pressure exerted on the substrate shall prevent the intrusion of water and soil through the joint sections of the manhole.

A sealing system shall be provided to prevent leakage of water into the manhole through the frame joint area and through the adjustment ring area. The sealing system shall be a Uni-Band sealing system as manufactured by Sealing Systems, Inc. (800-478-2054) or approved equivalent. The Uni-Band seal sealing system shall be installed according to the manufacturer’s recommendations. The top section of the seal shall extend 3” attaching to the casting base/flange with the side section covering over the entire grade adjustment ring area and onto the cone section a minimum of 2”.

All joints in manholes shall be sealed by means of a preformed, self-bonding, self-sealing gasket and be approved by the City prior to use. Ram-Nek joint sealant (or approved equivalent) shall be applied between manhole sections.

Joint seals shall be installed in full compliance with the manufacturer's current recommendations.

The interior surface of all sanitary sewer main line cleanouts (area under frame and cover and around pipe), shall be troweled and brushed smooth and free of pockets or depressions.

Except as otherwise specified, all manholes on active mains shall be accessible at all times.

After placing the surface course of asphalt concrete, all manholes and cleanouts shall be located and marked with white paint before the close of that work day.

Within two working days of paving, all manholes and cleanouts shall be adjusted to grade and inspected. 77-1.03H Abandon or Remove Existing Sanitary Sewer System Components 77-1.03H(1) General
Abandonment of existing sewer components shall conform to direction provided on the Drawings, applicable City Standards, and any modifications specified in the Contract Documents.

Existing sewer system components shall be removed where shown on the Plans or to facilitate the progress of work. The Contractor must receive written approval from the Engineer prior to removing any component, fully or in part, that is active during construction. Any removed components from an active system shall be replaced with approved materials to the satisfaction of the Engineer.
77-1.04 PAYMENT

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Refer to Section 9
77-2 WATER DISTRIBUTION SYSTEM
77-2.01 GENERAL
77-2.01A Summary
Section 77-2 includes general specifications for constructing water components and related items.

Excavation, backfill and shaped bedding must comply with Section 19-3. Work shall be constructed in accordance with these Special Provisions, Standard Specifications, the Plans and as directed by the Engineer. Any proposed deviations must first be approved in writing by the City of Ukiah Director of Public Works/ City Engineer.

The Contractor shall provide all means necessary, to the satisfaction of the Engineer, to ensure continuous service to all existing customers during and after work hours, weekends and holidays.

Paving (permanent and temporary) shall not take place until all underground work is finished, except as otherwise noted, and the Engineer has given written notice of acceptance to the Contractor The Contractor shall provide a full size set of water distribution system "record plans" for their project to the Engineer within 7 calendar days from the final connection to the City's water distribution system. All deviations from the improvement plans shall be recorded on the plans in red ink.
77-2.01B Definitions

NOT USED
77-2.01C Submittals
The Contractor shall submit to the Engineer, in writing, a list of all materials proposed to be used on the project, showing manufacturer's name, product trade name, type, grade, and weight. Material list shall be submitted and approved before any installation occurs. Supporting documentation and/or samples may be requested to allow the Engineer to make an informed decision on acceptance or rejection of the material.

Submittals are required for all couplings.

The Contractor shall submit manufacturer's warranty on products and a certificate showing compliance with applicable ASTM Standards
Controlled Low Strength Material (if used) must comply with Section 19-3 of the Standard Specifications.

All bracing and shoring shall conform to the Division of Industrial Safety Construction Safety Orders. Prior to the excavation of trenches five feet or more in depth, the Contractor shall submit to the City Engineer, a detailed plan prepared by a licensed Civil or Structural Engineer showing the design of shoring, bracing, sloping, or other provisions to be made for worker protection from the hazard of caving ground during the excavation of such trenches. A permit must be obtained from the State of California, Division of Industrial Safety and shall be submitted to the Engineer prior to starting the trench work. Proof of such permit shall be submitted to the Engineer prior to starting the trench work.

Prior to disposal of any materials or operation of any equipment on sites provided by the Contractor for disposal of excess trench excavation owned by him, the Contractor shall submit to the Engineer written authorization for such disposal of materials and entry permission signed by the owners of the disposal site and the required permits The Contactor shall submit the installation location for any proposed use of flange fittings. Use of flanged fittings other than those already specified herein must be approved by the City of Ukiah Director of Public Works/ City Engineer.

Methods and equipment used for hydrostatic testing shall be submitted to the Engineer for approval.

Methods, material and equipment used for disinfection of the water system shall be submitted to the Engineer for approval

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The Contractor shall submit a separate written request to the Engineer to schedule each individual shutdown required to facilitate a tie-in connection or any other work where a shutdown may be necessary. 77-2.01D Quality Assurance
77-2.01D(1) Materials
The City reserves the right to reject any material that may be supplied for use.. If the City obtains information indicating that a listed item is not performing satisfactorily or is found to be defective, that item will be rejected and the Contractor shall submit a replacement for review at no additional cost to the City.

Any pipe that is delivered to the job site that, in the opinion of the Engineer, shows signs of contamination, damage and/or defect, may result in the rejection of any pipe that was delivered to the supplier on the same shipment. 77-2.01D(2) Quality Control
77-2.01D(2)a Hydrostatic Testing
Prior to being allowed to connect to the City of Ukiah's water distribution system, except where otherwise specified, all newly constructed water mains, and their appurtenances, shall be hydrostatically tested in accordance with AWWA C600, and any modifications herein.

Water service laterals 4" and larger that are installed on an existing water main by cut-in or hot tap requires that the disinfection and bacteria test sampling shall take place prior to hydrostatic testing. The Contractor shall request, and the Engineer shall provide the proper procedures for this operation.

Methods and equipment used for hydrostatic testing shall be submitted to the Engineer for approval.

The Contractor, at their option, may test the system at any time during construction. However, the final test, which will be witnessed by the City for acceptance, shall take only place after the system is fully constructed and trenches backfilled and compacted, but prior to final paving.

Each valved section of the system, or combined sections, as approved by the Engineer, shall be hydrostatically tested to a pressure of not less than 150 psi measured at the highest point along the section to be tested. Where the static pressure in the City's distribution system to be connected to is greater than 100 psi, the test pressure shall be 1.5 times the static pressure of the City's distribution system.

If complying with the above requirements it appears that the specified test pressure may exceed the new system's designed thrust restraint, valving or joint pressures at the lowest elevation, the Contractor shall request direction from the City Engineer.

Except where otherwise specified or approved by the City Engineer, pressure testing against closed gate valves shall not take place. Where testing against a closed gate valve is approved, the valves supplied by the Contractor shall be rated to exceed the specified test pressure. Any damage to gate valves shall be the responsibility of the Contractor and must be corrected to the satisfaction of the City Engineer, including up to full replacement.

Each section of the new system shall be slowly filled with water, and all air expelled through an opening(s) located at the highest point(s) of the system. If necessary, tap the main at point(s) of the highest elevation(s) and install corporation stops to assist in expelling during filling of the system. Unless the taps are located where combination air and vacuum valves have been designed into the system, the penetrations shall be sealed with stainless-steel full circle clamps once all air is expelled. All caps, plugs, fittings and any other appurtenance shall be properly braced prior to pressurizing the system.

After all air is expelled, the specified test pressure (150 psi) shall be applied by means of an approved pump connected to the new system in a manner approved of by the Engineer. The pump, connection fittings, pressure gauge and measuring devices and all other necessary apparatus shall be furnished by the Contractor. The Contractor shall construct all openings into the new system required for filling and expelling air, and shall furnish all necessary assistance for conducting the tests. Before applying the test pressure, all air shall be expelled from the pipe.

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The gauge(s) used to measure pressure for the test shall be a liquid filled gauge with increments no greater than 5psi.

The duration of each pressure test shall be 2 hours, and the test pressure shall not vary by more than ±5psi.

The pressure shall be maintained within this tolerance by adding makeup water through the approved test pump into the system. The makeup water shall be accurately measured in gallons by a meter or by pumping from an approved vessel of known volume, and shall not exceed the applicable testing allowance as specified in Table 1.

Table 1 - Hydrostatic testing makeup water allowances per 100 ft of pipeline.

Gallons per hour
Nominal Pipe Diameter
Avg. Test
Pressure
(psi)
4” 6” 8” 10” 12” 14” 16” 18” 20” 24”
150 0.033 0.050 0.066 0.083 0.099 0.116 0.132 0.149 0.166 0.199 175 0.036 0.054 0.072 0.089 0.107 0.125 0.143 0.161 0.179 0.215 200 0.038 0.057 0.076 0.096 0.115 0.134 0.153 0.172 0.191 0.229 225 0.041 0.061 0.081 0.101 0.122 0.142 0.162 0.182 0.203 0.243 250 0.043 0.064 0.085 0.107 0.128 0.150 0.171 0.192 0.214 0.256 275 0.045 0.067 0.090 0.112 0.134 0.157 0.179 0.202 0.224 0.269 300 0.047 0.070 0.094 0.117 0.140 0.164 0.187 0.211 0.234 0.281 Leakage is defined as the quantity of water to be supplied into the newly constructed water system, or any valved section thereof, necessary to maintain the specified test pressure.

If at any time during the pressure and leakage testing the specified test pressure can be maintained ±3psi for a consecutive 30 minutes without adding makeup water, the test can be discontinued and the system considered as passing. Should any test of combined or individual sections of the new system show leakage greater than the specified limit, the Contractor shall, at their own expense, locate the cause and repair the defect until the leakage is within the specified allowance.

Regardless of test results, the Contractor shall repair any leaks detected. 77-2.01D(2)b Water Main Cleaning and flushing
Cleaning and flushing of new water system components purposed to be connected to the City of Ukiah's Water Distribution System shall conform to AWWA C651, all applicable City Standards, and any modifications herein and/or on the plans. To ensure the sanitary integrity of the new water system the Contractor shall practice proper sanitary technics during storage, handling and construction of the new water system.

All new water mains 4" and larger, installed with the intention of being dedicated to the City or being installed by contract for the City shall be cleaned and flushed prior to chlorination and sanitation.

During the installation of new water line(s), the Contractor shall insert an appropriately sized flexible polyurethane foam sweeping or cleaning style swab, with a density of 2 pounds per cubic foot, complete with polyurethane drive seal, into the beginning or ending segment of each pipe run. The swab shall stay in place until utilized for cleaning operations as specified.

Where tees or crosses are installed as part of the new system, swabs shall be placed where practical so both the run and branch segments are able to be swabbed. If determined by the Engineer that sanitary technics were practiced during construction, the Engineer may, at their discretion, allow segments of new pipe 80 linear feet or less to be cleaned by line flushing only. The City will not be responsible for extra time for locating lost swabs.

Unless otherwise approved by the City Engineer cleaning and flushing of all mainline pipes shall be accomplished by propelling the swab down the pipeline to an approved exit point (temporary or permanent blow-off) -with an approved source of potable water. After removal of the swab(s) a unidirectional flush of the new system shall continue until the

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water is completely clear.

All temporary blow off assemblies installed for the purpose of removing foam swabs required for water main cleaning shall be constructed as shown on the drawings with a "same size as main" elbow and vertical stand pipe to prevent trench and dispelled water from flowing back into the main. The contractor shall provide the excavation and backfilling required to establish any temporary pig flush assemblies. The contractor shall be responsible for requesting and coordinating all utility locations prior to excavation. The pit shall be constructed in such a manner, and the temporary flush removed, so as to prevent the backflow of dirty water into the new main. It shall be the responsibility of the contractor under the supervision of City of Ukiah to flush the pig through.

Any excavation, main removal and repair required to extricate a trapped swab shall be the responsibility of the contractor.

During the time any excavation is left open, the contractor shall provide all required safety barriers and fencing. When unattended, the area shall be surrounded with poly fencing. Taping off the excavated area is not considered sufficient.

After the swab is removed the end of the pipe shall be sealed watertight and all parts restrained to allow for testing. All temporary material shall be removed during operations to connect to the City's distribution system. In its place the contractor shall install a standard D.E. cap and flush
After swabbing, as specified above, is complete, any segment that may have been allowed to be omitted by the Engineer, and every lateral, shall be flushed until clean and free of air and debris.

Flushing shall be continued until the water leaving the system is clear and acceptable to the City of Ukiah, but in no case shall the flushing be performed for less than 10 minutes.

Water used for flushing shall be considered contaminated after exiting the new system and shall not be allowed to re-enter the system. If, in the opinion of the Engineer, the new system becomes contaminated the Contractor shall be required to redisinfect the system, all or in part, at no additional cost to the City.

The Contractor shall provide a storage tank large enough to store the flushing water. Refer to Section 77-2.01D(2)d "Disposal of water used for flushing and chlorination", for discharge of water used for flushing. 77-2.01D(2)c Water Main Disinfection
Disinfection of new water system components purposed to be connected to the City of Ukiah's Water Distribution System shall conform to AWWA C651, all applicable City Standards, and any modifications herein and/or on the plans.

To ensure the sanitary integrity of the new water system the Contractor shall practice proper sanitary technics during storage, handling and construction of the new water system.

Except as otherwise specified or permitted by the City Engineer, disinfection of the new system shall only take place after all lines have been cleaned and flushed, and each required hydrostatic test has been accepted by the Engineer.

All laterals, 2" and larger, including fire lines, installed on an existing main shall be disinfected and bacteriological test samples taken as specified herein.

All 1" and 1-1/2" service laterals components installed on an existing main shall be thoroughly swabbed with a 1 percent liquid chlorine solution during construction.

All laterals shall be thoroughly flushed just prior to being put into service.

Methods, material and equipment used for disinfection of the water system shall be submitted to the Engineer for approval.

Sodium hypochlorite (liquid chlorine) of 10%, 12.5% or 15% shall be utilized for disinfection operations and shall be applied as stated herein. The use of household bleach is not permitted for disinfection at any time.

The point of application of the disinfectant shall be through a permanent or temporary blow-off, or through a new fire hydrant installed as part of the new system. If none of the aforementioned components are available or practical for use, the Contractor may use a corporation stop of an approved size, if approved by the Engineer. Adequate venting must be allowed, and both filling and venting port elevations shall be a minimum of 6 inches higher than all components to be

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disinfected.

Water from the City's existing distribution system shall be used to fill the new mains at a slow controlled rate of flow during the application of the disinfectant; this rate of flow shall not exceed the limits of any openings used to expel water and/or air, including installed air release valves. Precautions shall be taken to prevent back pressure causing a reversal of flow into the City's water distribution system. In the process of disinfecting, all valves and other appurtenances on the new water system shall be operated in such a way to allow the disinfectant solution to be fully distributed to all components of the new water system.

The rate of disinfectant feed shall be in such proportion to the rate of water entering the pipe that the disinfectant dose applied shall be between 100ppm and 200ppm. The disinfectant solution shall be retained in the pipe for a period of at least 24 hours but no longer than 72 hours. After 24 hours, disinfectant levels shall not be less than 50% of the initial dosage, as recorded by the Inspector. If the disinfectant level is less than 50% of the initial dosage, the system shall be flushed and the above disinfection procedures repeated. When disinfectant levels are acceptable after the retention period, the chlorinated water shall then be discharged as specified in Section 77-2.01D(2)d "Disposal of water used for flushing and chlorination", and all new mains and laterals shall be given a final flush and then filled with water from the City's distribution system.

While the final flush of the new system is taking place the Engineer, or their representative, will take a chlorine residual reading from the City's distribution system and note it. If the reading is higher than 0.5 ppm, the new system shall be flushed until residual readings taken at all locations, as determined by the Engineer, are between the residual noted from the City's distribution system and 1 ppm, but no higher. If the residual taken from the City's distribution system is less than 0.05 ppm, the new water system shall be flushed until all locations are between 0.5 ppm and 1 ppm.

After the disinfectant is flushed from the new water system and all residual readings are as specified, an initial set, consisting of two bacteria test samples per location, shall be taken where specified by the Engineer per one of the following methods;
Method A:

Take a first set of sample tests just after flushing is complete, and the second after a minimum of 16 hours, but not more than 72 hours after flushing.

Method B:

After flushing is complete let the system sit a minimum of 16 hours without any use, then collect both sets of sample tests from the same locations 15 minutes apart while allowing the sample port to maintain a slight flow in between samples.

The method used shall be determined by the Engineer at the time of sampling.

All residual readings and bacteria test samples specified herein shall be taken by the Engineer, or their designee, and witnessed by the Contractor.

The Engineer must receive written test results showing that all samples from both sets taken are negative for contamination prior to scheduling connection(s) to the City's water distribution system.

If bacteria test results indicate contamination the new water system shall be flushed and sampling shall take place again as specified above. If any results from the additional sampling still show indication of contamination the new system shall be disinfected and flushed again prior to any additional bacteria test sampling taking place.

Unless otherwise approved by City Engineer, the initial two sets of bacteria tests will be considered valid for up to 14 calendar days after the second set has been taken. All other sets taken will be valid for up to 10 calendar days. If more time passes than those specified before connecting to the City's distribution system, additional passing bacteria test samples will be required before connections are approved.

Costs for the collection and analysis of the initial sets of bacteria test samples will be paid for by the City. The exact location and quantity of the samples will be determined in the field by the Engineer. There shall not be more than 1200 feet between sample points. Samples taken from fire hydrants, new or existing, shall be avoided where possible, if samples must be taken from a fire hydrant the hydrant shall first receive a high-volume flush to clean the interior.

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The City will pay labor and analytical fees for collecting and analyzing up to two additional sets of bacteria test samples. If additional testing is required, costs shall be borne by the Contractor. The City shall collect the samples and send it to their approved laboratory for testing at the Contractor’s expense.

If deemed necessary by the City Engineer, due to unsanitary or other construction practices, as determined by the Engineer, the Contractor may be required to do additional sampling with satisfactory results prior to connecting to the City's distribution system.
77-2.01D(2)d Disposal of water used for flushing and chlorination Water used for flushing and disinfection of newly constructed water systems is the property of the Contractor and its disposal is the responsibility of the Contractor. Chlorinated water used to disinfect the new mains shall be disposed of in accordance with AWWA C655, all laws and regulations, and any modifications herein or specified on other contract documents.

Discharge to the storm drain system or a waterway is not permitted without a permit from the North Coast Regional Water Quality Control Board.

Discharges may be allowed to be disposed of into the sanitary sewer system. 77-2.01D(2)e Epoxy Coating Tests
All applied epoxy coating systems shall be tested for thickness and flaws by the Coating Inspector. Coating Inspector shall perform the visual inspection, dry film thickness measurement and the holiday detection. If there is sign of coating defect, Coating Inspector shall notify the Engineer and perform additional testing such as adhesion testing. Contractor shall touch up areas, where coating inspection were performed, to the satisfactory of the Engineer. Test results shall be made available for inspection by the City. When directed by the City, additional testing shall be conducted by the Contractor under the supervision of the District Inspector at the job site. The decision of the City regarding test results will be final.

Tests for flaws and holidays in the coating system shall be conducted using a low voltage wet sponge device acceptable to the City at a voltage setting which shall be properly adjusted to detect any coating holiday. The voltage setting may be performed as follows:
• Contractor shall make a known holiday (a tiny hole) on the coated surface. • Slowly increase voltage setting of the holiday detector as recommended by NACE RP0188. • The maximum voltage setting on the holiday detector, which does not burn through the coating, and the alarm, which comes on at the known holiday, will be the correct voltage setting. • Repair the known holiday and conduct the high voltage holiday detection, any coating defect shall be repaired as specified below.

All areas failing to pass the electrical inspection shall be repaired at no expense to the City. In addition, any visible damage to the coating shall be repaired regardless of whether it passes the electrical detector test 77-2.02 MATERIALS
All materials used shall be lead free per California Health & Safety code, Section 116875.

The Contractor shall use a single manufacturer for pipe, fittings, valves, meter boxes (per sizes) unless otherwise approved by the Engineer.

All materials delivered to the job site shall be new and free from defects. 77-2.02A Pipe Materials
77-2.02A(1) Polyvinyl Chloride Pressure (PVC) Pipe
Polyvinyl Chloride (PVC) Pipe, 4" through 12", shall be new pipe, with a minimum pressure class (PC) rating of PC165, DR 25 conforming to the requirements of AWWA C900 "Polyvinyl Chloride (PVC) Pressure Pipe and Fabricated Fittings, 4" through 12" for Water Transmission and Distribution.