SLRP_-_Tech_Spec.pdf

TABLE OF CONTENTS TECHNICAL SPECIFICATIONS

Table of Contents Technical Specifications

Section 800 Additional Provisions for Utilities Contractors

Section 860 Street Pavement Schedule

Section 1025 Measurement and Payment

Section 1500 Site and Traffic Control for City of Palo Alto WGW Utilities Contracts

Section 2200 Excavation, Backfill, and Restoration

Section 2300 Polyethylene Pipe Installation for WGW

Section 2400 Fusion Procedures and Certification for Water and Sewer

Section 2730 Wastewater Design and Construction Standards

Section 2735 Sewer Construction with Polyethylene Pipe

Section 2737 Sanitary Sewer Lateral

Section 2739 Cleaning and Video Inspection of Sewer Pipe

Section 2740 Survey Data Collection

TABLE OF CONTENTS TECHNICAL SPECIFICATIONS

PAGE INTENTIONALLY LEFT BLANK

STREET PAVEMENT SCHEDULE

SECTION 860

STREET PAVEMENT SCHEDULE

SECTION 860

Surface restoration shall include all materials and labor required to restore the area both below and above ground. Restoration of pavement sections, sidewalks, driveways, landscaping, curbs and gutters, and backfill shall conform the City Standard Drawings and Specifications, latest version adopted. The pavement restoration shall be as per City’s restoration requirements and in accordance with the Public Works Department Standard Drawings and Specifications and Project Drawings.

Existing Pavement Section Table (Appendix J)

The pavement thickness type information provided above may not represent 100% of the actual pavement thickness in the project areas. For bidding purposes, the Contractor shall assume the minimum required thickness from the CPA Standard Specifications if the information is not available. For bidding purposes, the Contractor shall assume additional pavement thickness of up to 25% from the data provided and the CPA Standard Specifications, whichever is greater.

For restoration within other agencies’ right-of-way, the Contractor shall contact and follow the direction and requirements of the permitting agency.

The cost of pavement restoration shall be included in one or more of the bid items. If the discrepancy occurs between the proposed section and the actual pavement thickness, the Engineer shall be informed to verify the existing pavement thickness. The pavement shall be restored “in-kind" meeting the minimum requirement per CPA Standard Specifications.

END OF SECTION

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CITY OF PALO ALTO

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Section 860 PAGE 12

CITY OF PALO ALTO

MEASUREMENT AND PAYMENT SECTION 1025

Section 1025 PAGE 1

SECTION 1025

MEASUREMENT AND PAYMENT

1.01 REQUIREMENTS INCLUDED

The Work to be performed under this Contract shall consist of furnishing all tools, equipment, materials supplies, manufactured training , transportation and services (including fuel, power, water, and essential communications), labor, and other operations required for the fulfillment of the Contract in strict accordance with the Contract Specifications and Drawings/Maps, and other Documents as defined in Section 800 of these Specifications, all of which are made a part hereof.

All Work, materials and services not expressly shown or called for in the Contract Documents, which may be necessary for the complete and proper construction of the Work, in good faith, shall be performed, furnished, and installed by the Contractor as though originally so specified or shown, at no increase in cost to the City.

The organization of these specifications into divisions and sections, and the arrangement of the Drawings/Maps, is provided for reference only. This format shall not be used to define, limit, or separate the Work by subcontractor. The Contractor is responsible for completing all Work required to remove and replace sewer laterals, including all associated appurtenances and restoration, regardless of where such Work is described in the Contract Documents.

2.01 SCOPE

Work shall be in accordance with the requirements of the Contract Documents and shall include all appurtenances thereto, and all costs of compliance with the regulations of public agencies having jurisdiction, including Safety and Health Requirements of the California Division of Industrial Safety, the Occupational Safety and Health Administration of the U.S. Department of Labor (OSHA), and the Department of Transportation (DOT).

Work not specifically set forth as a pay item in the Bidder's Bid proposal but called for in the Contract Specifications or necessary to meet the requirements of this Contract, shall be considered a subsidiary obligation of the Contractor, and all costs in connection therewith shall be included in the Bid. This includes, but is not limited to, all traffic control requirements including flagmen, construction water, traffic loops repair and/or replacement, safety requirements, testing requirements, etc., required to perform the Work as described in the Contract Documents.

No separate payment will be made for any item that is not specifically set forth in the bid schedule except for work associated with change orders. All costs, therefore, shall be included in the prices named in the bid schedule for the various appurtenant items of Work.

3.01 WORK MEASUREMENT AND PAYMENT

The total Bid price shall cover all Work necessary for the proper and successful completion of the Contract. All Work not specifically set forth as a pay item in the Bidder's Bid but necessary to meet the requirements of this Contract shall be considered a subsidiary obligation of the Contractor, and all costs in connection therewith shall be included in the prices Bid. Three identical bid forms (base and supplemental unit price (SUP)) are provided for the three project years. The three-year total is the basis for bid evaluation.

All estimated quantities stipulated in the Bid form are approximate and are to be used only as a basis for estimating the probable cost of the Work and/or for the purpose of comparing the Bids submitted for the Work. The quantities listed in the Bid Table are approximate and may change during the construction based on actual field conditions and the Work performed. The basis of payment for unit price work will be the actual amount of Work completed. The Contractor agrees to make no claim for damages, including but not limited to lost or anticipated profits, overhead recovery, standby or idle labor/equipment costs, delay or disruption costs, or inefficiency claims, dborkov

Section 1025 PAGE due solely to any difference between estimated quantities and the actual quantities of Work performed.

SECTION A: Sewer Lateral Replacement – Base Bid Items – Year 1, Year 2, Year 3

Bid Item 001 – Design, Install, and Remove Sheeting, Shoring, Bracing & other excavation supports.

DESCRIPTION

The lump sum price bid shall include design, installation, and removal of sheeting, shoring, bracing, and other excavation supports necessary to complete all Work under the Contract in conformance with California Occupational Safety and Health (CAL OSHA) Standards and California Labor Code Sections 6705 and 6707. Measurement for payment will be a LUMP SUM for all Work that is necessary for this Bid item, including but not limited to sheeting, shoring, and bracing and all other incidentals required by under 3.4 of Section 2200 of this Specification. Progress payment invoices shall be submitted based on the combination of overall progress percentages linked to specific tasks.

Bid Item 002– Remove and Replace 4" or 6" Sewer Lateral Pipe (≥8’ and ≤12’ invert depth) by Open Cut Method.

DESCRIPTION

The unit price per each sewer lateral for removing and replacing existing sewer laterals by open cut shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth greater than 8 feet up to 12 feet.

Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications. The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, open cut replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract. The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main.

Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer greater than 8 feet invert depth up to 12 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line.

Bid Item 003– Remove and Replace 4" or 6" Sewer Lateral Pipe (≥8’ and ≤12’ invert depth) by Pipe Bursting Method.

DESCRIPTION

The unit price per each sewer lateral for removing and replacing existing sewer laterals by pipe bursting shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth greater than 8 feet up to 12 feet.

Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications.The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, pipe bursting replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract. The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main.

Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is dborkov included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer greater than 8 feet invert depth up to 12 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line.

Bid Item 004 – Remove and Replace 4" or 6" Sewer Lateral Pipe (< 8' invert depth) by Open Cut Method.

The unit price per each sewer lateral for removing and replacing existing sewer laterals by open cut shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth less than 8 feet. Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications.The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, open cut replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract.

The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main. Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer less than 8 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line.

Bid Item 005 – Replace 4" or 6" Sewer Lateral Pipe (< 8’ invert depth) by Pipe Bursting Method.

The unit price per each sewer lateral for removing and replacing existing sewer laterals by pipe bursting shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth less than 8 feet. Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications.The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, pipe burst replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract.

The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main. Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer less than 8 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line.

Bid Item 006 – Abandon 4" or 6" Sewer Lateral Pipe (≥8’ and ≤12’ invert depth).

The unit price per each sewer lateral abandoned shall include all labor, materials, equipment and incidentals necessary to abandon existing 4-inch or 6-in sewer laterals with invert depth greater than 8 feet up to 12 feet. The bid item shall include all Work necessary to complete the abandonment. Measurement for payment will be made for EACH completed sewer lateral abandonment, as verified by the Engineer. The Work includes, but is not limited to, cutting, capping or plugging the lateral at the sewer main and at the property line or cleanout, abandonment or removal of existing cleanouts as required, excavation and backfilling as necessary, surface restoration, disposal of removed materials, record drawings, and all work dborkov required to complete the abandonment in accordance with Technical Specifications.

Bid Item 007 – Abandon 4" or 6" Sewer Lateral Pipe (> 8' invert depth).

The unit price per each sewer lateral abandoned shall include all labor, materials, equipment and incidentals necessary to abandon existing 4-inch or 6-in sewer laterals with invert depths less than 8 feet. The bid item shall include all Work necessary to complete the abandonment.

Measurement for payment will be made for EACH completed sewer lateral abandonment, as verified by the Engineer. The Work includes, but is not limited to, cutting, capping or plugging the lateral at the sewer main and at the property line or cleanout, abandonment or removal of existing cleanouts as required, excavation and backfilling as necessary, surface restoration, disposal of removed materials, record drawings, and all work required to complete the abandonment in accordance with Technical Specifications.

Bid Item 008 – Allowance: Unforeseen Site Condition.

Pricing for the bid item, as assigned in the bid form, shall be used to cover all Work necessary to address unforeseen site conditions encountered during the project, including but not limited to:

subsurface obstructions, environmental contaminants, or other conditions differing materially from those indicated in the Contract Documents or typically encountered. This includes verifying and documenting the condition; performing trenching and excavation; removing and disposing of unexpected materials or debris; soil stabilization; dewatering, as required; backfilling and compaction; and restoring affected areas to pre-existing conditions as specified. The Contractor shall maintain compliance with applicable environmental and regulatory requirements. Payment will be made on a LUMP SUM basis for each unforeseen site condition agreed to by the City, subject to approved Change Orders supported by actual cost documentation, as determined by the Engineer. The price shall be full compensation for all labor, materials, equipment, mobilization, traffic control, and all other incidentals necessary to complete the Work in accordance with the Technical Specifications.

Bid Item 009 – Allowance: Landscaping/Hardscaping Restoration.

Pricing for this bid item, which is assigned in the bid form, shall be used to cover all Work necessary to restore landscaping and hardscaping elements disturbed or damaged during this project, including replanting vegetation, repairing or replacing irrigation systems, restoring turf or sod, replacing decorative features, and restoring pathways, pavements, or other hardscape features to pre-existing or specified conditions. The Work includes site preparation, removal and disposal of debris, furnishing and installing materials to match existing conditions, and any required inspections to complete the restoration in accordance with the Contract requirements. Payment will be made on a LUMP SUM basis for each landscape/hardscape restoration event agreed to by the City, based on an approved restoration approach and supporting cost documentation submitted by the Contractor and approved by the City. The price shall be full compensation for all labor, materials, equipment, mobilization, cleanup, erosion control, and all other incidentals necessary to complete the restoration work.

Bid Item 010 – Perform Pre- and Post-Construction Cleaning and CCTV Sewer Lateral Inspection.

The unit price for each sewer lateral for pre-construction and post-construction cleaning and CCTV inspection shall include all Work necessary to perform cleaning, water introduction and pre- and post CCTV inspection of the sewer laterals, including materials, labor, equipment, mobilization/demobilization, traffic control, removal and disposal of debris, control and disposal of groundwater and/or wastewater, preparation of inspection logs, delivery of digital video recordings, and all other incidentals required by the Contract, including pre-construction cleaning and video inspection. Pre-construction cleaning and CCTV inspection shall be performed in accordance with Technical Specifications section 2739. Water introduction shall be performed in accordance with dborkov

Special Provision section 1. Post-construction CCTV inspection shall utilize the capture-and-annotation system specified in the applicable section of the specification. No additional compensation will be provided for variation in pipe depth or size. Measurement for payment will be made per EACH sewer lateral cleaned and CCTV video recorded.

Bid Item 011 – ACP Storage and Disposal.

The unit price per cubic yard bid for Asbestos Cement Pipe (ACP) debris storage and disposal shall include all Work necessary to collect, handle, dewater (if needed), transport, temporarily store, label, and dispose of sanitary sewer debris at a permitted Class 3 landfill, in accordance with all applicable regulations and landfill requirements and Technical Specifications. Measurement for payment will be made per CUBIC YARD of debris collected, transported, and disposed of as verified by disposal documentation. The unit price shall include all labor, materials, equipment, mobilization/demobilization, traffic control, transportation, temporary storage setup, labeling, worker protection measures, dust control, air monitoring when required, waste characterization as required, preparation of manifests and disposal records, landfill fees, and all other incidentals required by the Contract. The temporary storage duration shall be for the full contract time. The quantity listed in the Bid Table is an estimate only. The Contractor shall submit disposal tickets/receipts with each progress payment request to support quantities and receive compensation for disposal fees.

Bid Item 012 – Perform GPS Survey for all installed laterals.

The LUMP SUM bid shall include all Work necessary to establish the City's horizontal coordinate and vertical datum benchmark, perform a GPS survey of the installed piping system prior to backfill, and provide the City with the AutoCAD (DWG) and CSV files of the survey objects per Section 2740 of these Specifications. Measurement for payment will be made on the percentage completed of the total project. The price will be full compensation for the Work, inclusive of materials, labor, tools, equipment, mobilization/demobilization, traffic control, transportation, and all other incidentals required by the Contract.

END OF SECTION A

SEWER LATERAL REPLACEMENT – Base Bid Items

SECTION B: Sewer Lateral Replacement – Supplemental Unit Pricing (SUP) – Year 1, Year 2 and Year 3

Bid Item 013- Dispose of excavated soils at Class 1 landfill.

The unit price per ton for this SUP item shall include the cost difference between disposing of the excavated soils at a Class 1 landfill versus a Class 3 landfill. The Work includes required soil characterization for Class 1 disposal (sampling, laboratory testing, documentation, and landfill coordination), loading, hauling, and disposal fees, in accordance with landfill requirements and applicable regulations and Technical Specifications. Measurement for payment will be made per TON of soil disposed at Class I landfill, based on verified disposal documentation. The quantity indicated in the Bid Table for this SUP item is an estimate for bidding purposes only. Compensation for this SUP item shall be based on the actual tonnage disposed. Truck tickets, weight tags, and/or disposal invoices shall be submitted with each payment application to support the requested quantities.

Bid Item 014 – Dispose of excavated soils at Class 2 landfill.

The unit price per ton for this SUP item shall include cost difference between disposals of the excavated soils at Class 2 landfill versus Class 3 landfill. The Work includes required soil characterization for Class 2 disposal (sampling, laboratory testing, documentation, and landfill coordination), loading, hauling and disposal fees, in accordance with landfill requirements and applicable regulations and Technical Specifications. Measurement for payment will be made per TON of soil disposed at a Class 2 landfill, based on verified disposal documentation. The quantity indicated in the Bid Table for this SUP item is an estimate for bidding purposes only. Compensation for this SUP item shall be based on the actual tonnage disposed. Truck tickets, weight tags, and/or disposal invoices shall be submitted with each payment application to support the requested quantities.

Bid Item 015 – Remove/relocate sewer lateral by open-cut excavation in paved area.

DESCRIPTION

The unit price per each for this SUP item shall include, but is not limited to, all costs required to remove and/or relocate an existing sewer lateral by open cut excavation in paved areas as shown on the map or as directed by the Engineer. The measurement for payment will be made per EACH completed sewer lateral removed/relocated in paved areas. The unit price cost for this SUP item shall include but is not limited to, saw cutting and removal of asphalt or concrete pavement, excavation, trenching, shoring (if required), potholing to locate and protect existing utilities, removal and disposal of existing sewer lateral pipe and appurtenances, furnishing and installation of new sewer lateral pipe, fittings and connections to the existing sewer main and/or cleanout, bedding, backfilling and compaction, dewatering and disposal of groundwater and/or wastewater (if required), flow control and bypass pumping (if required), testing, and complete surface restoration including aggregate base and paving to match existing conditions. The cost for pre-construction cleaning and video inspection shall be included in this bid item. The quantities specified in the bid table for this SUP bid item are for bidding purposes only. The actual quantities related to this SUP item will be defined by the number of sewer laterals removed/relocated by open cut excavation in paved areas during construction.

Bid Item 016 – Remove/relocate of sewer lateral by open-cut excavation in unpaved area.

The unit price per each for this SUP item shall include, but is not limited to, all costs required to remove and/or relocate an existing sewer lateral by open cut excavation in unpaved areas as shown on the map or as directed by the Engineer. The measurement for payment will be made per EACH completed sewer lateral removed/relocated in unpaved areas. The unit price cost for this SUP item shall include but is not limited to, saw cutting and removal of asphalt or concrete pavement, excavation, trenching, shoring (if required), potholing to locate and protect existing utilities, removal and disposal of existing sewer lateral pipe and appurtenances, furnishing and installation of new dborkov sewer lateral pipe, fittings and connections to the existing sewer main and/or cleanout, bedding, backfilling and compaction, dewatering and disposal of groundwater and/or wastewater (if required), flow control and bypass pumping (if required), testing, and complete surface restoration including aggregate base and paving to match existing conditions. The cost for pre-construction cleaning and video inspection shall be included in this bid item. The quantities specified in the bid table for this SUP bid item are for bidding purposes only. The actual quantities related to this SUP item will be defined by the number of sewer laterals removed/relocated by open cut excavation in unpaved areas during construction.

Bid Item 017 – Remove and Replace 4" or 6" Sewer Lateral Pipe (>12' invert depth) by open cut method.

The unit price per each sewer lateral for removing and replacing existing sewer laterals by open cut shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth greater than 12 feet. Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications. The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, open cut replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract.

The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main. Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer greater than 12 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line. The quantities specified in the bid table for this SUP item are for bidding purposes only.

Bid Item 018 – Replace 4" or 6" Sewer Lateral Pipe (>12' invert depth) by pipe bursting method.

The unit price per each sewer lateral for removing and replacing existing sewer laterals by pipe bursting shall include all Work necessary to replace the existing 4-inch or 6-inch sewer lateral with 4-inch or 6-inch SDR-17 HDPE pipe, for laterals with invert depth greater than 12 feet.

Measurement for payment will be made per EACH sewer lateral replaced in accordance with Technical Specifications. The price will be full compensation for the work, inclusive of labor, material, equipment, mobilization/mobilization, traffic control, locating existing lateral, locating existing cleanout, locating all interfering utilities (potholing), saw-cutting, trenching, excavation, removal and disposal of all materials of whatever nature encountered, control and disposal of groundwater and/or wastewater, pipe burst replacement of existing service lateral, replacement of existing cleanout including the cleanout box, connection to existing main or manhole, backfilling and compaction testing and surface restoration and all other appurtenances required by the Contract. The cost for pre-construction cleaning and video inspection shall be included in this bid item. The Work limits are from the property line cleanout to the new connection at the sewer main.

Installing a new wye fitting on the existing sewer main to reconnect the replaced sewer lateral is included in this bid item. Handling and disposal of ACP is not included. No additional compensation will be made for variation in depth of sewer greater than 12 feet invert depth, for variation in length of service lateral, or for rerouting the lateral perpendicular to the property line. The quantities specified in the bid table for this SUP item are for bidding purposes only.

Bid Item 019 – Abandon 4" or 6" Sewer Lateral Pipe (>12' invert depth).

The unit price per each sewer lateral abandoned shall include all labor, materials, equipment and incidentals necessary to abandon existing 4-inch or 6-in sewer laterals with invert depths greater than 12 feet. The bid item shall include all Work necessary to complete the abandonment.

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Measurement for payment will be made for EACH completed sewer lateral abandonment, as verified by the Engineer. The Work includes, but is not limited to, cutting, capping or plugging the lateral at the sewer main and at the property line or cleanout, abandonment or removal of existing cleanouts as required, excavation and backfilling as necessary, surface restoration, disposal of removed materials, record drawings, and all work required to complete the abandonment in accordance with Technical Specifications. The quantities specified in the bid table for this SUP item are for bidding purposes only. The actual quantities related to this bid item will be defined by the number of sewer laterals abandoned with invert depth greater than 12 feet during construction.

END OF SECTION B

SEWER LATERAL REPLACEMENT – Supplemental Unit Pricing dborkov

WASTEWATER DESIGN AND CONSTRUCTION STANDARDS SECTION 2730

SECTION 2730

WASTEWATER DESIGN AND CONSTRUCTION STANDARDS

1.01 WASTEWATER FLOW DESIGN (NOT USED)

1.02 PIPE CAPACITY (NOT USED)

1.03 PIPE SIZE, SLOPE, DEPTH, AND ALIGNMENT

A. Pipe Size: Pipes less than or equal to 10 inches in diameter shall be sized to handle peak flows at 75% of full pipe capacity. Pipes greater than 10 inches in diameter shall be sized to handle peak flows at 90% of full pipe capacity. The diameter for gravity sewer mains shall be 8-inches or larger while sewer laterals shall be 4-inches but no larger than 6-inches. A sewer lateral larger than 6-inches serving a private property shall be considered a private main, even if it crosses the City’s right-of-way. When a smaller sewer pipe joins a large one, the top of both pipes (crowns) should be at the same elevation.

B. Slope: All sewers shall be designed and constructed to give a mean velocity, when flowing full, of not less than 2 feet per second. The following are the minimum slopes that should be provided for each sanitary sewer segment:

Where velocities greater than fifteen (15) feet per second are attained, special provisions shall be made to protect against displacement by erosion, shock, and hydraulic jumps at changes in velocity.

Sewers on 20 percent slopes or greater shall be anchored securely with concrete anchors, spaced as follows:

1. Not over 36 feet on center for grades of 20 to 35 percent;

2. Not over 24 feet on center for grades of 35 to 50 percent;

3. Not over 16 feet on center for grades of 50 percent and over.

C. Depth: In general, sewers should be placed below pressure utilities and be sufficiently deep to receive sewage from basement. Crown (top inside surface of the pipe) of any inlet pipe shall not be lower than the elevation of the outlet main crown in the manhole, unless otherwise dborkov Text Box

CITY OF PALO ALTO

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Line approved by the Engineer.

D. Alignment: The horizontal and vertical alignment of sewers shall be maintained by the use of laser survey equipment. Unless otherwise approved by the Engineer, all sewers shall be constructed straight and at uniform grade between manholes.

1.04 WASTEWATER FLOW CONTROL/BY-PASS

Contractor shall furnish, install, and operate pumps, plugs, conduits, temporary piping, and other equipment to temporarily convey the sewage or to divert the flow of wastewater for pipe replacement/rehabilitation around the sewer reach in which work is or to be performed.

A. Temporary bypass in open pits at manhole, cleanout, and lateral-connection locations:

Contractor shall maintain uninterrupted sewer service to all properties connected to the sewer being replaced. Appropriate rigid pipe or flexible tubing shall be used, before the end of EACH workday, to make temporary connections to convey sewage where permanent connections could not be made at manhole, cleanout, and/or lateral to main locations. It is prohibited to leave standing sewage overnight in manhole and cleanout excavations.

B. Flow By-Pass: It shall be the Contractor’s responsibility to provide a pumping system with sufficient capacity to manage existing flows plus additional flow that may occur during a rain event. The pumping system shall have automated controls. Bypassed lines larger than 18” diameter shall automatically switch operation to the standby pumps in the event of a primary pump failure. The Contractor shall provide personnel to observe, fuel, and maintain the bypass pumping system at all times when it is operating. An audible alarm shall be provided to signal high level at the bypass point.

If the City must set up flow bypass or perform bypass pumping, whether because of contractor’s failure to set up flow bypass or to install needed pumps, the City will deduct the cost of flow bypass or pumping from contractor’s monthly progress payments.

Temporary bypass pipe used within truck-route roadways shall be installed below the street surface and properly plated. Plugs shall be so designed that all or any portion of the wastewater can be released. Plugs shall be provided with a tag line.

Standby pumps and standby power shall be provided with 100 percent redundancy. If pumping is required on a 24-hour basis in a residential or commercial area, Contractor shall get a City permit, construct, and use a temporary power service. If pumping is required on a 24-hour basis in an industrial area, equipment shall be sound-attenuated in a manner to keep noise to a minimum.

Noise level shall conform to the requirements of the City's noise ordinance as stated in the City of Palo Alto Municipal Code.

Bypass pumping shall be performed in such manner as will not damage public or private property or create a nuisance or health menace. The pumped wastewater shall be in an enclosed hose or pipe and shall be redirected into the sanitary sewer system. It shall be adequately protected from traffic. If applicable, the bypass hose or pipe along the sidewalk shall be covered with a ramp to protect the pedestrians from tripping and falling. Dumping or free flow of wastewater on private property, gutters, streets, sidewalks, or into storm sewers is prohibited. The Contractor shall not block access to driveways, streets, or other facilities with any flow control activities.

Temporary plugging will be permitted on pipes with diameters of 6-inches or smaller. See Section 1.05, Sewage Spill Contingency Plan for monitoring the manhole upstream of the plugged pipe.

The Contractor shall be liable for all damages associated with this work, including fines imposed on the City for spilled sewage. After the work has been completed, flow shall be restored to normal.

The Contractor shall submit a sewage bypass pumping/diversion plan to the Engineer for review

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CITY OF PALO ALTO

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Section 2730 PAGE 71 as part of the submittal process prior to the issuance of Notice to Proceed. The Contractor shall notify the Engineer 24 hours prior to commencing the bypass pumping operation. The Contractor’s plan for sewage bypass pumping/diversion shall be satisfactory to the Engineer before the Contractor shall be allowed to commence sewage bypass pumping/diversion.

Bypass pumping shall be performed in conformance with all applicable local, state and federal laws and permits issued by jurisdictional regulatory agencies. Permits required by such agencies (e.g., Valley Water, SFPUC, California Department of Fish and Game, Regional Water Quality Control Board, US Fish and Wildlife, Army Corps of Engineers) for by-pass pumping shall be obtained by the Contractor. It is the Contractor’s responsibility, while preparing the Bid, to evaluate what permits need to be obtained and estimate fees and anticipate lead time necessary to procure the required permits to complete the Work. Payment of all costs and expenses for such licenses, permits, and fees shall be included in one or more bid items. No other compensation shall be paid to the Contractor for these items or for delays caused by non-City agencies or conditions set forth in the licenses or permits issued by other agencies.

1.05 SEWAGE SPILL CONTINGENCY PLAN

The Contractor shall submit for Engineer’s approval a “Sewage Spill Contingency Plan" consisting of secondary containment, diversion, and pumping capable of handling the flow rate in the subject sewer line. The Contractor is also required to:

A. Notify the on-site inspector before any main is plugged to facilitate construction work.

B. Determine the release point* if the main should not be unplugged before an overflow occurs.

C. Require a job laborer to observe the flow and monitor the rise in elevation of the sewage in the manhole at the release point.

D. The contractor is to notify the project inspector when the elevation of the sewage is within 1.5’ of the rim at the release point manhole.

*Release point is the lowest point in the sewer collection system tributary to the plugged line. The manhole rim and invert elevations, and the peak flow information, can be obtained from the Engineer.

1.06 WASTEWATER MAIN REMOVAL OR ABANDONMENT (NOT USED)

1.07 MANHOLES (NOT USED)

1.08 AERIAL CROSSINGS (NOT USED)

1.09 SEWERS CROSSING STREAMS (NOT USED)

1.10 PROTECTION OF WATER SUPPLIES

A. Water Supply Interconnections: There shall be no physical connections between a public or private potable water supply system and a sewer collection system, or appurtenance thereto which would permit the passage of any sewage or polluted water into the potable supply. No water pipe shall pass through or come in contact with any part of a sewer manhole.

B. Storm system interconnections: There shall be no physical connections between a public or private development storm drainage system, or appurtenance thereto which would permit the passage of any sewage or polluted water into the storm drain system. No storm drain pipe shall pass through or come in contact with any part of a sewer manhole.

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C. Relations to Water Works Structures: Sewers shall meet the requirements of the State Water Resources Control Board "Criteria for the Separation of Water Mains and Sanitary Sewers".

END OF SECTION

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2026 WGW Section860