CN4699-QuarterlyWellInstall-Specifications-Final.pdf

SPECIFICATIONS FOR

CONTRACT NO. 4699

KIEFER LANDFILL

QUARTERLY LFG WELL

INSTALLATION SERVICES

KIEFER LANDFILL

SLOUGHHOUSE, CA

PROJECT MANAGER

John Jowers, P.E.

County of Sacramento Department of Waste Management and Recycling

10863 Gold Center Drive Rancho Cordova, CA 95670

NOTE: The County of Sacramento Standard Construction Specifications, revised November 2024, are hereby made a part of these Specifications. A copy of the Standard Construction Specifications may be downloaded from the County website at www.saccountyspecs.net.

https://gcc02.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.saccountyspecs.net%2F&data=05%7C02%7Czuberj%40saccounty.gov%7C54db9404673f47f90c5708deccac7cfb%7C2b077431a3b04b1cbb77f66a1132daa2%7C0%7C0%7C639173238405261517%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=gxBcSBQRE%2FUL%2BOxjaFTwE467p7jBnuaaFBriHwpKaqo%3D&reserved=0

Kiefer Landfill Quarterly LFG Well Installation Services Specifications for Contract

Special Provisions June 2026 Page 01000-1

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01000

SPECIAL PROVISIONS

1.1 Scope of Work

A. The work to be performed under this contract includes furnishing all labor, materials, and equipment, as provided in these Specifications for Contract, for the construction of new vertical extraction wells and associated piping and appurtenances, with an option for horizontal collectors in the place of or in addition to vertical extraction wells, at the Kiefer Landfill. Construction activities under this scope of work are anticipated to be conducted over a period of two (2) years. One (1) mobilization per quarter shall be required to complete work requested by COUNTY prior to each mobilization. The scope of work requested each quarter will vary based on COUNTY needs. The bidding quantities presented in these Specifications for Contract are expected to approximate the actual future work scope of the County for a quarterly mobilization.

B. For bidding purposes only, CONTRACTOR shall assume the following:

1. Four (4) mobilizations per year, to occur once per quarter.

2. Each mobilization will include:

a. Ten (10) existing vertical well decommissionings, including overdrilling and destroying existing well casings to a depth of 20-feet below ground surface, then plugging with 3-foot depth (nominal) bentonite and 1-foot depth (minimum) soil topper to return to grade.

b. Four (4) vertical extraction well installations to a depth of 100-feet each, with wellheads and connections to new 3” HDPE laterals.

c. Four (4) vertical extraction well installations to a depth of 160-feet each, with wellheads and connections to new 3” HDPE laterals.

d. 100 linear feet of 3” HDPE lateral pipe installation per new well, connected to 8” HDPE header pipe via new 8”x3” tee.

e. One (1) run of 500 linear feet of 8” HDPE header pipe installation, connected to an existing 12” HDPE header via one (1) new 12”x8” tee.

f. One (1) 8” gate valve installed into the new 8” HDPE header length.

June 2026 Page 01000-2

g. One (1) road crossing, for contractor-installed HDPE lateral or header piping, through compacted soil or gravel-topped dirt road or soil bench at length 40 linear feet, approximately 3-foot width, and depth not to exceed 5 vertical feet. Crossings of larger or more complex construction, or crossings requiring shoring, are not intended.

3. For bidding purposes only, CONTRACTOR shall include an option estimate for construction of two (2) horizontal collectors, assuming the following:

a. Construction of two (2) horizontal collectors to be in lieu of constructing the vertical extraction wells in a given quarter.

b. Each horizontal collector will consist of:

i. Two (2) terminations with vertical wellheads.

ii. 100 linear feet of 3” HDPE lateral pipe per wellhead, connected to an existing 8” HDPE header pipe via new 8”x3” tee per new pipe run.

iii. 850 linear feet of trench excavation and recompaction.

iv. 750 linear feet of perforated 6” HDPE collector pipe set in a collector trench. Collector trench will consist of drainage gravel with a nonwoven geotextile barrier.

v. 100 linear feet of solid 4” HDPE pipe, installed in two (2) 50 linear foot sections, connecting to each end of the 6” collector pipe and terminating at the vertical wellheads.

1.2 Project Location

A. Kiefer Landfill 12701Kiefer Boulevard Sloughhouse, Ca. 95683.

1.3 Drawings

A. The Construction Drawings are entitled: Quarterly LFG Well Installation, dated May 15, 2026.

1.4 Builder's Risk Insurance

3-9.04.C Builder’s Risk Insurance of the Standard Construction Specifications is replaced with: Builder's Risk Insurance will not be required for this project.

1.5 CONTRACTOR’s Pollution Liability Insurance

A. Section 3-9.04.D Environmental Liability Insurance of the Standard Construction Specifications is replaced with:

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1. Contractor, or its environmental sub-contractor, shall procure, maintain, and keep in force at all times during the term of the Contract, at the Contractor’s sole expense, Contractor’s Pollution Liability insurance with limits not less than:

a. Each Occurrance or Claim: Two Million Dollars ($2,000,000)

b. General Aggregate: Two Million Dollars ($2,000,000)

2. The Contractor or its environmental sub-contractor shall name the County of Sacramento as an additional insured on the Contractor’s Pollution Liability insurance policy. The Contractor’s Pollution Liability insurance policy shall not contain any cross liability limitations as regards the County of Sacramento as an additional insured. The Contractor or its environmental sub-contractor’s Automobile Liability insurance shall be endorsed to include pollution liability coverage with a combined single limit for bodily injury and property damage of not less than Two Million Dollars ($2,000,000).

1.6 Time of Completion

A. The time for completion of this contract is anticipated to be two (2) calendar years commencing as specified in Section 7, “Beginning of Work,” of the Standard Construction Specifications.

B. Completion schedules for quarterly construction activities will be negotiated between CONTRACTOR and COUNTY for each quarterly construction event.

C. CONTRACTOR to review quarterly construction event final plans and provide notice to COUNTY within fourteen (14) calendar days of acceptance of work, or state any work CONTRACTOR claims outside the bidding scope of this Project.

Work CONTRACTOR claims outside the Project bidding scope of work shall be negotiated as specified in Section 01000 Out-of-Scope Work of these Specifications for Contract.

D. Each construction event shall be completed no later than 30 calendar days after the end of the calendar year quarter for which it is defined except under agreement between CONTRACTOR and ENGINEER.

1.7 Liquidated Damages

A. Liquidated damages shall be $10,000 for each calendar day delay in completing individual quarterly construction events. Refer to Section 8 of the County Standard Construction Specifications.

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1.8 Pre-Bid Conference

A. A pre-bid conference will not be held.

1.9 Standard Construction Specifications

A. The County of Sacramento 2024 Standard Construction Specifications effective on November 1, 2024, are hereby made part of these Specifications for Contract.

A copy of the Sacramento County Standard Construction Specifications may be downloaded from the County website at:

www.saccountyspecs.net

B. The project Specifications for Contract use a modified version of the Construction Specifications Institute (CSI) format that is comprised of 16 divisions. The CSI format divisions shall not operate to make the County an arbiter to establish subcontract limits between CONTRACTOR and/or subcontractors. The General CONTRACTOR is responsible to the COUNTY for all phases of construction and delivering a complete job.

1.10 Examination of Plans, Specifications, and Site of Work

A. Submit pre-bid questions and requests through the County’s eProcurement system, OpenGov, under the project being bid.

B. Bidders may contact the COUNTY to arrange for pre-bid site visits. No pre-bid site meeting will be held, as noted in the NOTICE TO CONTRACTORS.

1.11 Accuracy of Drawings and Specifications

A. The existing conditions depicted on the Construction Drawings and these Specifications for Contract are developed from record information. Exact locations, distances, dimensions, elevations, etc., shall be governed by actual field conditions and verified by the CONTRACTOR. The ENGINEER shall be notified of any discrepancies found prior to the start of work in that area.

1.12 LFG Collection System Shutdowns

A. The ENGINEER shall be notified five (5) working days in advance of any contemplated shutdown of any portion of the LFG collection system. The ENGINEER's approval shall be obtained prior to any shutdown activity. The CONTRACTOR shall schedule and coordinate all connections and other work to be performed for the completion of the project with ENGINEER.

1.13 Storage of Supplies, Materials, Equipment, Etc.

A. The CONTRACTOR shall obtain the prior approval of the ENGINEER for http://www.saccountyspecs.net/

June 2026 Page 01000-5 any area or space required for CONTRACTOR's storage during construction operations. Materials, equipment, etc., shall not be piled or stored in any location that would interfere with the conduct of normal functions of the building and/or facilities, and shall not constitute a hazard to persons or property. The CONTRACTOR shall install any required safety precautions such as signs, danger signals, lanterns, barricades, etc., during construction operations.

1.14 Testing

A. Any testing required for CONTRACTOR supplied soils, asphalt, concrete, aggregate, pipe, fittings, and other products for installation shall be performed by the CONTRACTOR or SUPPLIER in accordance with the County Standard Construction Specifications.

1.15 Additional Sets of Contract Documents

A. Following execution of the Contract, the County will provide electronic files in PDF format of Specifications for Contract, Construction Drawings, and addenda to the CONTRACTOR. Hard copy sets of construction document sets will not be furnished.

1.16 Signs

A. No advertising signs of any kind will be permitted except by written permission of the ENGINEER.

1.17 CONTRACTOR's Field Office

A. A space for a CONTRACTOR field office shall be made available.

1.18 ENGINEER's Field Office

A. An ENGINEER’s field office is not required.

1.19 Temporary Services

A. Water

1. CONTRACTOR may connect temporary line to existing water service lines at the site. The CONTRACTOR is to verify conditions at site.

B. Electrical Power

1. CONTRACTOR shall coordinate with Site ENGINEER in order to hook-up to existing service.

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2. CONTRACTOR shall arrange for and install power service from SMUD service lines, as necessary.

C. Telephone

1. CONTRACTOR may arrange for and install telephone service for his or her own use. The CONTRACTOR shall not use County telephones.

D. Field Toilets

1. The CONTRACTOR shall furnish, install, and remove at completion of the job, all sanitary; i.e., portable toilet facilities required for the completion of the job. The type and location of the facilities shall be subject to acceptance by the ENGINEER.

2. All sanitary facilities shall be made available for use by all workers, subcontractors, consultants, and COUNTY personnel associated with the project.

3. The CONTRACTOR shall maintain sanitary facilities in a proper, safe, operating, and sanitary condition for the duration of the work. Facilities shall be provided in sufficient quantities to comply with CAL-OSHA regulations.

4. Existing facilities at site shall not be used by CONTRACTOR's employees.

E. Fences, Barricades, Warning Signs, And Lights

1. To confirm to CAL-OSHA regulations, other State of California and local codes, rules, regulations, and ordinances for protection of workers, public and private property, provide, install and maintain barricades, warning devices and other protection required therefore.

2. CONTRACTOR to provide temporary fencing, etc., as required to protect material storage and equipment from theft, and vandalism.

1.20 Out-of-Scope Work

A. Work related to but outside the specific bidding item scope of this Project, if requested by COUNTY, will be completed at the discretion of the CONTRACTOR and COUNTY at rates negotiated prior to work. Work determined by CONTRACTOR to be outside the bidding scope of this Project for any reason will be communicated to COUNTY prior to work as soon as is practicable and according to Section 01000 Time of Completion, of these Specifications for Contract.

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1.21 Erosion, Sediment, and Water Pollution Control

A. Work under this contract shall be subject to the requirements of the NPDES Regulations and the Storm Water Pollution Prevention Plan (SWPPP) for the landfill. Construction related activities performed by the CONTRACTOR and subcontractor(s), shall be performed to eliminate non stormwater discharges to the stormwater control system. The CONTRACTOR shall submit a Water Pollution Control Plan to the Site ENGINEER in compliance with the site specific SWPPP. The CONTRACTOR shall notify the Site ENGINEER of any conditions that could lead to noncompliance with the permit requirements.

B. The CONTRACTOR shall not be entitled to any time extensions or compensation for any costs due to any action required as a result of CONTRACTOR’s failure to comply with those provisions of the Storm Water Pollution Control Plan. The CONTRACTOR is responsible to ensure that subcontractor(s) comply with this provision.

C. The CONTRACTOR is not required to obtain a NPDES Industrial permit.

However, the CONTRACTOR shall abide with the site’s NPDES requirements in accordance with the site ENGINEER.

1.22 Special Security Requirements

A. The CONTRACTOR's workers and equipment shall be limited to the work areas as designated by this contract.

B. The CONTRACTOR shall make all necessary provisions and be responsible for the security of the work and the site until final inspection and acceptance of the work. Schedule of Work and Limitations

C. During the progress of work, landfill facilities operation shall be maintained without interruption, except by specific arrangement with the County and then only at such times as approved in writing by the ENGINEER. The CONTRACTOR will be required to maintain access to the operating portion of the landfill at all normal times of business. The CONTRACTOR will be required to provide traffic control and provide alternate routes of access if construction activities interfere with the flow of traffic along the Landfill's main access road or main haul roads. If construction activities impair the flow of customer traffic and alternate routes of access are not available, then evening and nighttime work periods will be used to complete the work.

1.23 Allowable Times and Hours of Work

A. Typical work may be performed between the hours of 6 a.m. through 8 p.m., 7 days per week, excluding Legal Holidays. The CONTRACTOR may perform work between 8 p.m. and 6 a.m. When the CONTRACTOR wants to work

June 2026 Page 01000-8 between the hours of 8 p.m. and 6 a.m., the COUNTY must be notified 7 calendar days in advance.

1.24 No Waiver of Government Claim Process

A. No statement in this Agreement shall constitute a waiver of government claim filing requirements pursuant to Title 1, division 3.6 of the California Government Code or as otherwise set forth in local, state and federal law.

1.25 Excavated Refuse and Construction Debris

A. Excavated refuse and construction debris shall be disposed of by the CONTRACTOR at the active face of the landfill according to these Specifications for Contract.

1.26 Submittals

A. Pre-work submittals shall be made to the COUNTY/ENGINEER a minimum of 7 working days in advance of the commencement of related work. All submittals shall be provided digitally in a PDF format. The COUNTY/ENGINEER shall review and return an electronic copy after review. CONTRACTOR shall make additional submittals as required by the ENGINEER. COUNTY's/ENGINEER's approval of submittals shall not relieve CONTRACTOR from responsibility for any resulting deficiencies or related unapproved deviations from the Construction Drawings and Specifications for Contract.

B. The following pre-work submittals shall be made:

1. Injury Illness Prevention Program

2. Code of Safe Work Practices, Contract Specific Safety Plan Task Specific Safety Plan

3. Water Pollution Control Plan

4. Driller Qualifications

5. Vertical Landfill Gas Well and Horizontal Collector Aggregates

6. Bentonite Plug Material

7. Perforated Vertical Well Casing and Fittings

8. HDPE Pipe and Fittings

9. Butterfly Valves

June 2026 Page 01000-9

10. Wellhead Assemblies and Flexible Hose

11. Geotextile Fabrics

C. Post-work submittals shall be made to the COUNTY/ENGINEER as soon as practicable upon completion of related work.

D. The following post-work submittals shall be made:

1. Drilling, As-Built Well, and Well Decommission logs

2. Other records of completion, as needed

END OF SECTION

Measurement and Payment June 2026

Page 01270-1

SECTION 01270

MEASUREMENT AND PAYMENT

PART 1 - GENERAL

1.1 Summary

A. This section includes general requirements for measurement and payment as they apply to this Contract.

B. The CONTRACTOR will compute all quantities. Where necessary, such computations will be based upon surveys performed by the CONTRACTOR.

Quantities for final payment will be reviewed and approved by the COUNTY.

1.2 Related Sections

A. Measurement and Payment - Section 8 of the Standard Construction Specifications.

1.3 Measurement of Quantities

A. Measurement Standards: All work to be paid for at a Contract price per unit of measurement will be verified by the COUNTY consistent with United States Standard Measures.

A. Measurement by Volume:

1. Measurement by volume will be by the cubic dimension listed or indicated in the Bid Schedule. Method of volume measurement will be as determined or directed by the COUNTY.

2. Confirmation of volume may be required by utilizing weighing methods. In this event, such volumes will be converted to weight measurement for payment purposes. Factors for conversion from weight measurement to volume measurement will be determined by the COUNTY and shall be agreed by the CONTRACTOR before such method of measurement of pay quantities will be accepted.

B. Measurement by Area: Measurement by area will be by the square dimension listed, or indicated in the Bid Schedule. Method of square measurement will be as determined or directed by the COUNTY.

C. Linear Measurement: Linear measurement will be by the linear dimension listed or indicated in the Bid Schedule. Method of linear measurement will be as determined or directed by the COUNTY. Generally, items, components, or work to be measured will be measured at the centerline of the item in place.

Page 01270-2

D. Lump-Sum Measurement: Lump-sum measurement will be for the entire item, unit of work, structure, or combination thereof, as listed or indicated in the Bid Schedule.

E. Allowance: Payment under an allowance item will only be made upon acceptance and approval of quantities of work, invoices or other appropriate documentation as determined by the Agency.

1.4 Field Measurement for Payment

A. The CONTRACTOR shall compute all quantities of work performed or of materials and equipment delivered to the site for payment purposes.

B. The COUNTY may at any time verify quantities calculated by the

CONTRACTOR.

1.5 Payment

A. Payment will be full compensation for furnishing all labor, materials, tools, equipment, transportation, permit fees, services, and incidentals, as specified, and for performing all work necessary for completing the erection or installation of the item or work classification, including all adjusting and balancing, testing, cleaning, and all other incidental work.

B. Full compensation for all expenses involved in conforming to the requirements for measuring materials or work shall be considered as included in the unit or lump-sum prices paid for the materials or work being measured, and no additional compensation will be permitted.

C. Full compensation for an item of work for which no measurement or payment is specified will be considered to be included in the applicable related item of work in the Bid Schedule or incidental of the Contract.

1.6 Values of Unit Prices

A. The number of units and quantities contained in the Bid Schedule are approximate only, and final payment will be made for the actual number of units and quantities, which are incorporated into or made necessary by the work included in this Contract.

B. In the event that work and materials or equipment are required to be furnished to a greater or lesser extent than is indicated by the Construction Drawings and Specifications for Contract, such work and materials or equipment shall be furnished in greater or lesser quantities.

Page 01270-3

1.7 Changes and Extra Work

A. Changes and extra work ordered by the COUNTY will be measured and paid for consistent with the requirements of Changes and Claims - Section 9 of the Standard Construction Specifications.

1.8 Rejected Materials

A. Quantities of material wasted or disposed of in a manner not called for under the Contract will not be paid. Rejected loads of material, including material rejected after it has been placed by reasons of the failure of the CONTRACTOR to conform to the provisions of the Contract; material not unloaded from the transporting vehicle; material placed outside the limits indicated on the Construction Drawings or established by the COUNTY; or material remaining on hand after completion of the work, will not be paid for, and such quantities shall not be included in the final total quantities. No compensation will be permitted for loading, hauling, and disposing of rejected material. CONTRACTOR is responsible for removing all CONTRACTOR supplied rejected and unused materials from site. All COUNTY supplied rejected or unused materials shall be disposed of or placed in on-site storage at the direction of the COUNTY.

1.9 Contract Bid Items

A. This section includes the items of work and the basis of payment for these tasks. The CONTRACTOR shall bid Items listed below separately and provide a total sum for all work items. The CONTRACTOR is responsible for supplying all materials, unless otherwise indicated in the bid item or as specifically provided in these Specifications for Contract, equipment and labor necessary for the complete construction and installation of all work as described in these Specifications for Contract and as shown on the Construction Drawings. Payment for each work item will be made on either a unit price (EA), lump sum (LS), lineal foot (LF), vertical foot (VF), cubic yard (CY), acre (AC), or square foot (SF) basis, and only after that portion of the project has been completed.

B. Bid items are split into two portions. Items 1 through 9 are base bid items and will be used by CONTRACTOR to develop a full anticipated cost for a quarterly mobilization. Items 10 through 17 are a separate option bid group that CONTRACTOR will use to develop a separate Option cost, as described in section 01000 of these Specifications for Contract.

C. Bid items:

1. Mobilization and Demobilization. This task includes any and all temporary

Page 01270-4 facilities and utilities, health and safety plans, water pollution control plan, surveys, and construction equipment required for this project. Payment for this work will be made on a lump sum (LS) basis. Payment shall be made in accordance with Section 8 of the Standard Construction Specification.

2. Vertical Extraction Wells. Supply all material, equipment and labor necessary for the drilling and construction of vertical extraction wells as shown on the Construction Drawings. Measurement shall be made from the ground surface to the maximum depth of the well casing. Payment for this item will be on a vertical foot (VF) basis.

3. Extraction Wellheads. Supply all materials, equipment and labor for the construction of the extraction wellheads. This item includes installing a wellhead or a remote wellhead, fittings, and flex hoses with adequate slack and appurtenances as shown on the Construction Drawings. Payment for this item will be on a unit price (EA) basis.

4. 3” SDR 9 HDPE Pipe. Supply all materials, equipment, and labor for the construction and installation of 3-inch diameter SDR 9 HDPE lateral pipe as shown on the Construction Drawings. Include all labor and materials for the SDR 9 HDPE pipe, fittings, and joining, including cutting, cleaning and fusing of pipe, as applicable, and connection to new or existing HDPE header.

Payment for this item will be made on a linear foot (LF) basis.

5. 8” SDR 17 HDPE Pipe. Supply all materials, equipment, and labor for the construction and installation of 8-inch diameter SDR 17 HDPE header pipe as shown on the Construction Drawings. Include all labor and materials for the SDR 17 HDPE pipe, fittings, and joining, including cutting, cleaning and fusing of pipe, as applicable, and connection to new or existing HDPE header. Payment for this item will be made on a linear foot (LF) basis.

6. 8-inch Butterfly Valve. Supply all materials, equipment, and labor to furnish and install 8-inch butterfly valves. Include all labor and materials for the butterfly valves, beveled flange adapters, flanges, fittings, and appurtenances. Payment for this item will be on a unit price (EA) basis.

7. Well Aggregate. Supply all materials, equipment and labor for the installation of Well Aggregate as shown on the Construction Drawings. Measurement will be based on a per ton basis and consist of the cumulative weight of imported material as measured by a certified scale. Scale weight tickets shall be submitted as supporting documentation. Payment for this item will be made on a weight (TONS) basis.

8. Dirt and Gravel Road Crossing. Supply all materials, equipment, and labor to excavate and install a header or lateral road crossing through an existing compacted soil and/or gravel access roadway, as shown on the Construction

Page 01270-5

Drawings. Material costs for header or lateral pipe construction shall not be included in this item and will be paid per Items 3 or 5, as appropriate. Crossing dimensions not to exceed 5-foot deep, 40-foot long, approximately 3-foot wide excavations without the need of shoring. Crossings of larger or more complex construction are not included. Payment shall be standardized on a unit price (EA) basis.

9. Decommission Vertical Extraction Well. Supply all materials, equipment, and labor to decommission existing vertical extraction wells as shown on the Construction Drawings. Include removal of incidental waste and construction debris, including existing wellhead. Payment for this item will be on a unit price (EA) basis.

D. Option Bid Items:

10. Option: Mobilization and Demobilization. This task includes any and all temporary facilities and utilities, health and safety plans, water pollution control plan, surveys, and construction equipment required for this project.

Payment for this work will be made on a lump sum (LS) basis. Payment shall be made in accordance with Section 8 of the Standard Construction Specifications.

11. Option: Horizontal Collector Trench Excavation. Supply all equipment, labor and materials necessary for the excavation of the Horizontal Collectors Trenches as shown on the Construction Drawings. Measurement of this item will be based on cumulative linear footage of the centerline of excavated trenches. Payment for this item will be on a linear foot (LF) basis.

12. Option: Well Aggregate. Supply all materials, equipment and labor for the installation of Well Aggregate as shown on the Construction Drawings.

Measurement will be based on a per ton basis and consist of the cumulative weight of imported material as measured by a certified scale. Scale weight tickets shall be submitted as supporting documentation. Payment for this item will be made on a weight (TONS) basis.

13. Option: 8 oz/sy Nonwoven Geotextile Fabric. Supply all materials, equipment, and labor for the installation of Geotextile Fabric as shown on the Construction Drawings. Measurement of will be based on the square footage of installed geotextile and shall not include overlaps, seams, or wasted material. Payment for this item will be made on a square foot (SF) basis.

14. Option: 6” HDPE SDR11 Perforated Pipe. Supply all materials, equipment and labor for the construction and installation of the perforated pipe in the horizontal collector trenches as shown on the Construction Drawings. Include all labor and materials for the SDR 11 HDPE pipe, fittings, and joining.

Measurement will be based on the cumulative linear footage of pipe installed.

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Payment for this item will be made on a linear foot (LF) basis.

15. Option: 4” SDR 9 HDPE Pipe. Supply all materials, equipment and labor for the construction and installation of 4-inch diameter SDR 9 HDPE lateral pipe as shown on the Construction Drawings. Include all labor and materials for the SDR 9 HDPE pipe, fittings, and joining, including cutting, cleaning and fusing of pipe, as applicable, and connection to new or existing HDPE header. Payment for this item will be made on a linear foot (LF) basis.

16. Option: Trench Termination and Horizontal Wellhead. Supply all materials, equipment and labor for the construction and installation of trench termination and wellhead as shown on the Construction Drawings. Include all labor and materials for the trench termination and wellhead installation.

Measurement will be based on the number of installed terminations of this type. Payment for this item will be made on a unit price (EA) basis per installed termination.

17. Option: 3” SDR 9 HDPE Pipe. Supply all materials, equipment, and labor for the construction and installation of 3-inch diameter SDR 9 HDPE lateral pipe as shown on the Construction Drawings. Include all labor and materials for the SDR 9 HDPE pipe, fittings, and joining, including cutting, cleaning and fusing of pipe, as applicable, and connection to new or existing HDPE header. Payment for this item will be made on a linear foot (LF) basis.

Layout of Work and Surveys June 2026 Page 01400-1

SECTION 01400

LAYOUT OF WORK AND SURVEYS

PART 1 - GENERAL

1.1 Summary

A. This section includes general requirements for survey work to be performed by the CONTRACTOR for layout of work features, for performance of work, and for field measurements of work quantities for payment purposes.

1.2 Description of Work

A. The CONTRACTOR and the COUNTY shall share responsibility for and perform surveys and measurements necessary for layout and control of work, as specified in this section. Surveys shall be performed in accordance with the requirements of the Standard Construction Specifications.

B. Before commencing surveys, the CONTRACTOR shall give the COUNTY 2 working days written notice in advance so that the COUNTY may witness such work.

1.3 Related Sections

A. Section 01270 - Measurement and Payment, of these Specifications for Contract, and the Standard Construction Specifications.

1.4 Description

A. Reference Points: The reference points to be provided by the COUNTY will include referenced monuments, survey control line(s), and elevation bench marks in the vicinity of the project. If displaced by the CONTRACTOR, replacement of these reference points will be at the expense of the CONTRACTOR. All other necessary reference points shall be established by the

CONTRACTOR.

B. The CONTRACTOR shall furnish all necessary detail surveys including all lines, grades, and appropriate surveys as specified. Surveys shall be performed under direct supervision of a California Registered Professional Land Surveyor.

C. The COUNTY reserves the right to perform any desired checking and correction of the CONTRACTOR’s surveys but this shall not relieve the CONTRACTOR of the responsibility for adequate performance of the work.

The COUNTY will complete any checking within 2 working days of the CONTRACTOR’s completed survey.

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D. Equipment and Personnel: The CONTRACTOR’s instruments and other survey equipment shall be accurate, suitable for the surveys required, consistent with recognized professional standards, and in proper condition and adjustment at all times.

E. Field Notes and Records: The CONTRACTOR shall record surveys in duplicate page field notebooks. The original pages of such records shall be furnished to the COUNTY at intervals required by the COUNTY. The COUNTY will have up to 2 working days to review the data and notify the CONTRACTOR of any errors. A duplicate of each field notebook shall be furnished to the COUNTY when filled or completed.

F. Use by the COUNTY: The COUNTY may at any time use line and grade points and markers established by the CONTRACTOR. The CONTRACTOR’s surveys are a part of the work and may be checked by the COUNTY or representatives of the COUNTY at any time. The CONTRACTOR shall be responsible for (1) any lines, grades, or measurements which do not comply with specified or proper tolerances, or which are otherwise defective and (2) any resultant defects in the work. The CONTRACTOR will be required to conduct resurveys or check surveys to correct errors indicated by review of the field notebooks or otherwise detected.

1.5 Surveys for Layout and Performance of Work

A. The COUNTY shall stake all new well locations and underground piping in advance of construction. The CONTRACTOR shall perform any additional surveys for layout and performance of the work, reduce the field notes, make necessary calculations, and prepare drawings necessary to carry out such work.

1.6 Surveys for Measurement for Payment

A. When these Specifications for Contract or the COUNTY require Bid Schedule items of work to be measured by surveying methods, the CONTRACTOR shall perform the surveys. The CONTRACTOR will reduce the field notes and calculate final quantities for payment purposes. A duplicate of the note reductions and calculations will be given to the COUNTY for review and approval.

B. The COUNTY shall provide CONTRACTOR with the most recent topographic survey for the site to serve as the preconstruction topographic survey. As-built surveys generated by the CONTRACTOR for determining payment quantities will be submitted on drawings to the COUNTY indicating location of survey point (i.e., northing, easting, and elevation) and shall be stamped by a California Registered Professional Land Surveyor. The COUNTY shall have up to 5 working days to review and approve the as-built surveys. After final approval by the COUNTY, the CONTRACTOR shall submit electronic copies for each

June 2026 Page 01400-3 survey.

1.7 Surveys for As-Built Drawings

A. The COUNTY may perform an as-built survey of constructed facilities at the completion of the project. CONTRACTOR may complete an as-built survey at own expense for verification purposes.

1.8 Surveying Accuracy and Tolerances in Setting of Survey Stakes

A. Control traverse field surveys and computations shall be performed to an accuracy of at least 1:24,000.

B. The tolerances generally applicable in setting survey stakes shall be set forth below. Such tolerances shall not supersede stricter tolerances required by the Construction Drawings or Specifications for Contract, and shall not otherwise relieve the CONTRACTOR of responsibility for measurements in compliance therewith.

C. Elevation tolerances shall be:

Permanent Reference Points 1 in 10,000 ±0.01 foot

General Excavation and 1 in 2,000 ±0.1 foot Earthwork

D. Tolerances for designed depths, elevations, and thicknesses shown on the Construction Drawings shall be ±0.10 foot, unless otherwise stated in these Specification for Contract or on the Construction Drawings.

Waste Handling June 2026 Page 02111-1

SECTION 02111

WASTE HANDLING

PART 1 - GENERAL

1.1 Summary

A. This section includes general requirements for waste handling to be performed by the CONTRACTOR during the course of work.

1.2 Description of Work

A. The CONTRACTOR shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary to complete waste handling and disposal during construction. The work will be carried out as specified herein and in accordance with the Standard Construction Specifications and Construction Drawings.

PART 2 - MATERIALS

2.1 Materials

A. Construction debris is any waste material generated during work excepting existing waste refuse located within the Kiefer Landfill which was present prior to CONTRACTOR work.

B. Excavated refuse is defined as existing waste refuse located within the Kiefer Landfill, present prior to CONTRACTOR work, which is excavated or otherwise removed from the existing waste mass.

PART 3 - EXECUTION

3.1 Waste Disposal

A. CONTRACTOR will be responsible for disposal of construction debris and excavated refuse generated during work.

B. CONTRACTOR shall load, haul, and dispose of construction debris and excavated refuse to the active working face of the landfill as designated by the COUNTY, with those costs borne by the CONTRACTOR. Disposal will only be allowed during regular landfill operating hours. There will be no tipping fee for waste generated with this project.

Waste Handling June 2026 Page 02111-2

3.2 Waste Minimization and Management

A. CONTRACTOR will minimize generation of excavated refuse to quantities necessary to complete work.

B. Excavated refuse and construction debris shall be disposed of as soon after generation as is practicable. CONTRACTOR will be responsible for cleanup of all construction debris and excavated refuse to the satisfaction of the COUNTY.

C. Prior to the end of each working day and prior to projected storm events, the CONTRACTOR shall cover all exposed waste with a minimum of 6 inches of cover soil or plastic sheeting.

D. In addition to limiting the extent of exposed waste, placement of soil cover materials, application of dust suppressants (or water), and/or odor suppressants shall be performed by the CONTRACTOR as needed to satisfactorily control dust and odors (or as directed by the ENGINEER) during the construction.

Excavation, Backfilling, and Compaction June 2026 Page 02300-1

SECTION 02300

EXCAVATION, BACKFILLING, AND COMPACTION

PART 1 – GENERAL

1.1 Summary

A. The work described in this section includes all excavation, backfilling, and compaction necessary to complete work shown on the Construction Drawings and specified in these Specifications for Contract.

1.2 Description of Work

A. The CONTRACTOR shall furnish all labor, materials, equipment, and incidentals necessary for excavating, grading, backfilling, and compacting as shown on the Construction Drawings and as specified herein. All work under this section, as applicable, shall comply with the requirements of the Standard Construction Specifications with exceptions and special requirements as set forth herein in the Special Provisions.

1.3 Federal and State Regulatory Requirements

A. All trench excavations shall comply with the applicable trench safety standards as stated in the OSHA and CalOSHA excavation safety standards.

1.4 Job Conditions

A. All existing infrastructure, bench marks, monuments, and other reference points shall remain undisturbed unless specifically directed otherwise by the

COUNTY.

B. CONTRACTOR shall give adequate prior notice to the COUNTY, utility agencies, and other legal authorities prior to starting work.

C. CONTRACTOR shall coordinate his operations with Landfill Operations, Energy Power Partners, other contractors, trades, utility firms, and other affected public departments to assure continuity of both access and work, in conformance with applicable requirements of these organizations. Services to adjacent, adjoining property shall not be impeded.

PART 2 – MATERIALS

June 2026 Page 02300-2

2.1 General

A. On-site excavated materials may be used where approved by the COUNTY.

B. Rocks larger than 2 inches in diameter, trash, and objectionable materials shall be removed from all fills to be compacted.

2.2 Fill Materials

A. Bedding: Bedding shall consist of sand or sound earthen material and shall be free of broken concrete, broken pavement, wood, organic material, refuse, or other deleterious material.

B. Well Aggregate: Well aggregate shall conform to the material, submittal, and placement requirements identified in Section 02350 of these Specifications for Contract.

C. General Backfill: Materials placed in backfill shall be free from rocks or stones larger than 2 inch, as well as brush, stumps, logs, roots, debris, and organic or other deleterious materials; and must be approved by the COUNTY.

PART 3 – EXECUTION

3.1 Inspection

A. In addition to examining the topographic survey, the CONTRACTOR is expected to have visited and inspected the site in order to determine the grades and true conditions under which the work is to be performed.

B. Should any omissions, conflicts, or ambiguities in these Specifications for Contract or Construction Drawings be discovered during the examination of the Contract Documents or upon visiting the premises of the project during the construction, such discrepancies shall be brought to the attention of the ENGINEER prior to construction. The questions will be reviewed and, where the information sought is not clearly specified or indicated on the Construction Drawings, a clarification will be issued which shall become a part of the Construction Documents.

3.2 Protection

A. The CONTRACTOR shall at all times during construction provide and maintain proper equipment and facilities to remove all water entering excavations, and shall keep such excavations dry so as to obtain a satisfactory undisturbed subgrade foundation condition.

B. Dewatering shall at all times be conducted in such a manner as to preserve the

June 2026 Page 02300-3 undisturbed bearing capacity of subgrade soils at the bottom of the excavation.

C. Dewatering may be accomplished by means of submersible pumps. trash pumps, settling tanks, transfer pumps, and water trucks/tankers.

D. Storm water entering the excavation from surface runoff shall be collected in shallow ditches around the perimeter of the excavation, drained to sumps, and pumped from the excavation to maintain a bottom free from standing water. Any requirements and costs for such use shall be the responsibility of the CONTRACTOR. The CONTRACTOR shall not cause flooding by overloading or blocking flow in the drainage facilities, and shall leave the facilities unrestricted and clean as originally found. Any damage to facilities shall be repaired or restored as directed by the ENGINEER, at no cost to COUNTY.

E. Conveying of dewatered liquids in open ditches or trenches will not be allowed.

Permission to use any storm sewers, or drains, for water disposal purposes shall be obtained from the ENGINEER. Any leachate collected from any excavation will be collected and hauled off site for disposal. Any damage to facilities shall be repaired or restored as directed by the ENGINEER, at no cost to COUNTY.

3.3 Excavation, Backfill, Fill Placement and Compaction

A. If the bottom of any excavation is taken below the limits shown on the Construction Drawings or specified or directed by the ENGINEER, it shall be refilled at the CONTRACTOR's expense.

B. If, in the opinion of the COUNTY, the material, in its undisturbed natural condition, at or below the normal grade of the excavation as indicated on the Construction Drawings, is unsuitable for foundation, it shall be, removed to such depth and width as the ENGINEER may direct and replaced with suitable material, at COUNTY expense.

C. No excavation shall be allowed to remain open overnight, unless otherwise approved by the COUNTY.

D. Bedding shall be placed as specified on the Construction Drawings.

E. As soon as practical after any pipe has been laid, jointed, and tested as required, backfilling shall begin and thereafter be prosecuted expeditiously.

F. Excavations shall be backfilled to the original grades or as indicated on the Construction Drawings. Deviation from these grades because of settling shall be corrected by the CONTRACTOR. Backfill operation shall be performed to comply with rules and regulations and in such manner that it does not create a nuisance or safety hazard.

June 2026 Page 02300-4

3.4 Excess Excavated Materials

A. All suitable excess excavated material shall be stockpiled in areas specified by the ENGINEER.

B. All construction debris, excavated refuse, rocks, logs, stumps, roots, and other unsuitable excavated materials will be disposed of by the CONTRACTOR to working face of the landfill during regular business hours.

Landfill Gas Collection Well Aggregate June 2026 Page 02350-1

SECTION 02350

LANDFILL GAS COLLECTION WELL AGGREGATE

PART 1 – GENERAL

1.1 Summary

A. The work described in this section consists of furnishing all labor, materials, equipment, and incidentals necessary for providing and installing well aggregate as shown on the Construction Drawings and as specified herein.

1.2 Description of Work

A. The CONTRACTOR shall furnish all labor, materials, tools, supervision, transportation, equipment, and incidentals necessary for the installation of the landfill gas collection well aggregate. The work shall be carried out as specified herein and in accordance with the Standard Construction Specifications and Construction Drawings.

1.3 Submittals

A. The CONTRACTOR shall submit to the ENGINEER for approval, at least 7 working days prior to the start of construction, Certificates of Compliance for proposed aggregate materials. Certificates of Compliance shall indicate that the aggregate source meets the material requirements specified in this Section.

1.4 Quality Assurance

A. The CONTRACTOR shall ensure that the materials and methods used for aggregate meet the requirements of the Construction Drawings and this Section. Any material or method that does not conform to these documents, or to alternatives approved, in writing, by the ENGINEER will be rejected and shall be repaired or replaced by the CONTRACTOR.

B. The CONTRACTOR shall be aware of all monitoring and field/laboratory conformance testing required by the ENGINEER. This monitoring and testing, including random conformance testing of construction materials and completed work, will be performed by the ENGINEER. If nonconformance’s or other deficiencies are found in the materials or completed work, the CONTRACTOR will be required to repair or replace the deficiency.

PART 2 – MATERIALS

Landfill Gas Collection Well Aggregate June 2026 Page 02350-2

2.1 Aggregate

A. Aggregate shall be graded as follows: 100 percent passing 2-inch and 0 to 5 percent passing 3/8-inch (Size 4 coarse aggregate, 1 ½ inch nominal gravel).

PART 3 – EXECUTION

3.1 Storage

A. The CONTRACTOR shall store aggregate in locations approved by the ENGINEER. All aggregate shall be placed on firm soil. CONTRACTOR shall minimize contamination of the aggregate with other materials.

3.1 Placement

A. The CONTRACTOR shall place to the lines, grades, and dimensions shown on the Construction Drawings.

B. The CONTRACTOR shall avoid puncturing or damaging in any way the gas well collection piping during placement of the aggregate material.

C. Any damage to the gas well collection piping which is caused by the CONTRACTOR or his representatives shall be repaired by the CONTRACTOR, at his expense.

D. No density or moisture requirements are specified for placement of the landfill gas collection well aggregate material.

Vertical Landfill Gas Wells June 2026 Page 02600-1

SECTION 02600

VERTICAL LANDFILL GAS WELLS

PART 1 – GENERAL

1.1 Summary

A. The work described in this section consists of furnishing all labor, materials, equipment, and incidentals necessary for installation, abandoning, and decommissioning vertical landfill gas wells as shown on the Construction Drawings and as specified herein.

1.2 Description of Work

A. The CONTRACTOR shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary for the installation, abandoning, and decommissioning of vertical landfill gas wells on this project.

The work will be carried out as specified herein and in accordance with the Standard Construction Specifications and Construction Drawings.

B. Location, quantity, and depth of wells shall be as indicated on the Construction Drawings. The CONTRACTOR shall follow the well drilling schedule provided on the Construction Drawings.

1.3 Submittals

A. The CONTRACTOR shall submit the following in accordance with the schedule in Section 01000 of these Specifications for Construction:

1. Driller qualifications, including the driller’s license number

2. Vertical aggregate

3. Certificates of Compliance for proposed bentonite plug

4. Perforated vertical well casing and fittings

5. Post-work Drilling and As-Built Well log(s) including the following information. CONTRACTOR shall provide the format for post-work logs and may submit sperate or combined logs per each completed well which contain both Drilling and As-Built information.

a. Drilling information required:

i. Well ID.

ii. Date of well installation.

June 2026 Page 02600-2

iii. Name of supervising professional completing the form.

iv. Description of materials encountered at 10-vertical-foot intervals, including generalized composition, level of decomposition, and level of compaction.

v. Assessment of temperature and moisture in materials at 10-foot-intervals, and solid to liquid ratio if free liquid is present.

vi. Description of other occurrences or problems during drilling when encountered.

b. As-built information required:

i. Borehole diameter.

ii. Depth of the bottom of the casing and bottom of the borehole.

iii. Casing material and diameter and wall thickness (SDR or Schedule).

iv. Perforated or screened interval.

v. Type, size, and intervals of gravel pack, bentonite, and clean soil backfill installed.

PART 2 – MATERIALS

2.1 General

A. The CONTRACTOR shall provide materials that meets the requirements of the Construction Drawings and these Specifications for Contract.

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