SPECIFICATIONS FOR CONTRACT NO. 4386 KIEFER LANDFILL …

SPECIFICATIONS FOR

CONTRACT NO. 4386

KIEFER LANDFILL 2017 GAS SYSTEM IMPROVEMENTS

KIEFER LANDFILL SLOUGHHOUSE, CA

PROJECT MANAGER

Jeremy Zuber County of Sacramento

Department of Waste Management and Recycling 9850 Goethe Road

Sacramento, CA 95827

CONTRACT NO. 4386

KIEFER LANDFILL

KIEFER LANDFILL 2017 GAS SYSTEM IMPROVEMENTS

TABLE OF CONTENTS FOR CONTRACT DOCUMENTS

BIDDING REQUIREMENTS PAGES INCLUSIVE NOTICE TO CONTRACTORS i - iii PROPOSAL -- BID FORM 1 - 6 DIVISION 1 - GENERAL REQUIREMENTS Note: By reference, the County of Sacramento Standard Construction Specifications dated

January 2016 is hereby made part of these Specifications. A copy of the Standard Construction Specifications may be obtained at the cashier's window in Room 101 of the County Administration Building, 827-7th Street, Sacramento or on the web at http://www.saccountyspecs.saccounty.net/Pages/default.aspx.

SECTION 01000 - SPECIAL PROVISIONS PROJECT SPECIFICATIONS Division 1 Section Pages 01270 – Measurement and Payment 01270-1 to 6

01400 – Layout of Work and Surveys 01400-1 to 3

Division 2 Section Pages 02000 – Condensate Pumping Systems 02000-1 to 3

02111 – Waste Handling 02111-1 to 2

02250 – Landfill Gas Collection Well Aggregate 02250-1 to 2

02400 – Excavation, Backfilling, and Compaction 02400-1 to 4

02600 – Vertical Landfill Gas Wells 02600-1 to 4

02650 – Wellhead Assembly 02650-1 to 4

02750 – High-Density Polyethylene Pipe, Fittings and Valves 02750- 1 to 6

02800 – Pressure Testing of Pipe 02800-1 to 3

NOTICE TO CONTRACTORS

TO ALL PROSPECTIVE BIDDERS: Notice is hereby given that the Board of Supervisors of Sacramento County, California, will receive sealed bids as follows: BID DATE: August 10, 2017 SUBMIT BIDS TO: DEPARTMENT OF GENERAL SERVICES

CONTRACT AND PURCHASING SERVICES DIVISION 9660 ECOLOGY LANE SACRAMENTO, CA 95827

UNTIL 2:00 P.M. (LOCAL TIME)

FOR: CONTRACT NO. 4386

KIEFER LANDFILL, 2017 GAS SYSTEM IMPROVEMENTS

ESTIMATED CONSTRUCTION COST: $800,000 CONTRACTOR'S CALIFORNIA LICENSE A AND/OR CLASS REQUIRED: PRE-BID CONFERENCE DATE, TIME, & LOCATION: Tuesday, July 25, 2017 @ 10:00 a.m.

KIEFER LANDFILL ENGINEERING BUILDING, 12701 KIEFER BLVD., SLOUGHHOUSE, CALIFORNIA

PROJECT DESCRIPTION: The work to be performed under this contract includes furnishing all labor, materials, and equipment for construction of nine new vertical extraction wells, a 1,775 foot collection trench and, approximately 9,000 linear feet of collection piping at the Kiefer Landfill. A non-mandatory pre-bid conference and walk-through will be held for the purpose of reviewing and answering questions regarding this project. Any interested contractor or his/her agents are encouraged to attend. Representatives of the owner will be present for questions.

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Files of the plan set and specifications are available on-line at http://www.wmr.saccounty.net/Pages/Doing-Business-with-Us.aspx. Upon receipt of the plans and specifications, all potential bidders must immediately transmit to the Project Manager the following information: company name, contact name, physical mailing address (cannot be a P.O. box), phone number, fax number, and company email address. Providing this information will ensure that the potential bidder will be included on the plan holders list and will receive all addenda that are issued for this project. Award of this contract requires a valid California contractor’s license with the classification identified above. Questions & Answers: Please submit all questions relating to this request for bid by 5:00 p.m., August 4, 2017, to Jeremy Zuber and Tim Israel at [email protected] and [email protected]. The DWMR will not respond to questions after this date. A list of the questions and answers will be emailed within 3 business days as an addendum to this request for bid. Go to http://www.saccountybids.net for the plan holders list, bid info and results. Go to http://www.saccountyspecs.net for the County of Sacramento Standard Construction Specifications, adopted by the Board of Supervisors and as revised January 2016. Each bid must be submitted on the bid forms provided in the Contract Documents. Each bid must also be accompanied by security in the form of a bid bond issued by a corporate surety, a certified check, or cashier's check payable to the Treasurer of Sacramento County, or cash for an amount not less than ten percent (10%) of the aggregate sum of the bid. The successful bidder shall be required to execute a Material and Labor Payment Bond and Performance Bond, issued by a corporate surety, acceptable to the County of Sacramento, each for not less than one hundred percent (100%) of the contract price. No contractor or subcontractor may be listed on a bid proposal for a public works project (submitted on or after March 1, 2015) unless registered with the Department of Industrial Relations pursuant to Labor Code section 1725.5 [with limited exceptions from this requirement for bid purposes only under Labor Code section 1771.1(a)]. No contractor or subcontractor may be awarded a contract for public work on a public works project (awarded on or after April 1, 2015) unless registered with the Department of Industrial Relations pursuant to Labor Code section 1725.5. LABOR COMPLIANCE PROGRAM: The County of Sacramento received final approval from the Director of California Department of Industrial Relations as a Labor Compliance Program effective March 15, 1994. All questions regarding this Labor Compliance Program and prevailing wage requirements should be directed to the Labor Compliance Section at (916) 875-2711. In accordance with Section 1771.5 of the California Labor Code, the payment of the general prevailing rate of per diem wages or the general prevailing rate of per diem wages for holiday and overtime is not required for any public works project of twenty-

http://www.wmr.saccounty.net/Pages/Doing-Business-with-Us.aspx

mailto:[email protected]


http://www.saccountybids.net/

http://www.saccountybids.net/

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five thousand dollars ($25,000) or less when the project is for construction work, or for any public works project of fifteen thousand dollars ($15,000) or less when the project is for alteration, demolition, repair, or maintenance work. This is a construction project in accordance with Section 1771.5 of the California Labor Code. Pursuant to California Labor Code Section 1720 and following, and Section 1770 and following, the successful bidder shall pay not less than the prevailing rate of per diem wages as determined by the Director of the California Department of Industrial Relations. Copies of the prevailing wage determinations are on file at the office of the County of Sacramento Labor Compliance Program, 9700 Goethe Road, Suite D, Sacramento, CA 95827, and are also available on the internet at http://www.dir.ca.gov/DLSR/PWD. Pursuant to California Contract Code Section 22300, the contractor may, at its own expense, substitute securities for any money being withheld by the County to ensure performance under this contract. The County reserves the right to reject any or all bids, to waive any informality in any bid, and to determine which bid, in the judgment of the County, is the lowest responsive bid of a responsible bidder. For questions on contract documents contact Jeremy Zuber, Project Manager, at [email protected].

http://www.dir.ca.gov/DLSR/PWD


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COUNTY OF SACRAMENTO

PROPOSAL - BID FORM CONTRACT NO. 4386

KIEFER LANDFILL

2017 GAS SYSTEM IMPROVEMENTS SUBMIT BID TO: Department Of General Services Contract and Purchasing Services Division 9660 Ecology Lane, Sacramento, CA 95827 NO LATER THAN: 2:00 P.M. ON BID DATE TO: Board of Supervisors County of Sacramento STATE OF CALIFORNIA BID OPENING: Department Of General Services Contract and Purchasing Services Division 9660 Ecology Lane, Sacramento, CA 95827 APPROXIMATELY 2:10 P.M. ON BID DATE

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I. BID:

Pursuant to your published NOTICE TO CONTRACTORS for the above-referenced project, and in accordance with the approved Plans and Specifications for that project, the following bid for said entire project is hereby submitted by the firm indicated in Section 1 and Section 7 (Contractor Information) of this Bid Form. Contractor Name: ______________________________________________________________

Item Quantity Unit Unit Cost Total

1 Mobilization and Demobilization 1 LS

2 Vertical Extraction Wells 690 VF

3 Dual Phase Extraction Wellheads 18 EA

4 Boring Abandonment 100 VF

5 Horizontal Collector Trench 1,775 LF

6 2” SDR 9, HDPE Pipe 4,750 LF




10 12” SDR 17, HDPE Pipe 1,560 LF

11 8” Butterfly Valve Assembly 8 LS

12 12” Butterfly Valve Assembly 6 LS

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13 Condensate Pumping System 2 LS

14 Surveying and Staking 1 LS $20,000 $20,000

15 Dewatering (see Schedule of Values below) 1 Allowance $85,000 $85,000

Bid Total

16 Optional Bid-Item: Substitute Aggregate for County Supplied TDA, unit cost per ton 500 Ton

Notes: In the event the product of a unit price and an estimated quantity do not equal the extended amount stated, the unit price will govern and the correct product of the unit price and the estimated quantity shall be deemed to be the amount bid. Dewatering Allowance – Schedule of Values

Furnish Item Unit Unit Cost Total

1 Submersible Pumps EA

2 Trash Pumps EA

3 Transfer Pumps EA

4 Generators EA

5 Settling Tanks EA

6 Water Trucks/Tankers EA

Operate Item Per Unit Unit Cost Total

7 Leachate Dewatering and Disposal per 1,000 Gallons

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II. ADDENDA:

Acknowledgment is hereby made of receipt and incorporation of addendum number __ through __ into this Bid.

III. BID GUARANTY:

Bid security must be a bidders bond, a certified check or cashier's check payable to the Treasurer of Sacramento County, or cash. Bids secured by personal checks or personal guarantees will be rejected.

IV. AFFIDAVIT OF NONCOLLUSION:

The bidder swears and deposes that he or she is the party making the foregoing bid, that the bid is not made in the interest of, or on behalf of, any undisclosed person, partnership, company, association, organization, or corporation; that the bid is genuine and not collusive for sham; that the bidder has not directly or indirectly induced or solicited any other bidder to put in a false or sham bid, and has not directly or indirectly colluded, conspired, connived, or agreed with any bidder or anyone else to put in a sham bid, or that anyone shall refrain from bidding; that the bidder has not in any manner, directly or indirectly, sought by agreement, communication or conference with anyone to fix the bid price of the bidder or any other bidder, or to fix any overhead, profit, or cost element of the bid price, or of that of any other bidder, or to Secure any advantage against the public body awarding the contract of anyone interested in the proposed contract; that all statements contained in the bid are true; and, further that the bidder has not, directly or indirectly, submitted his or her bid price or any breakdown thereof, or the contents thereof, or divulged information or data relative thereto, or paid, and will not pay, any fee to any corporation, partnership, company, association; organization, bid depository or to member or agent thereof to effectuate a collusive or sham bid.

V. SUBCONTRACTOR LISTING:

In accordance with the California Public Contract Code, Division 2, Part 1, Chapter 4, Section 4100, and following, the subcontractors listed on the Bid Form will perform the indicated work of improvement on the project.

VI. TYPE OF BUSINESS (Check One):

[ ] CORPORATION STATE OF INCORPORATION ________________________ [ ] PARTNERSHIP [ ] JOINT VENTURE [ ] PRIVATE INDIVIDUAL [ ] INDIVIDUAL DOING BUSINESS UNDER A FIRM NAME

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VII. CONTRACTOR INFORMATION

Firm Name _______________________________________________________ NOTE: In addition, Place name on Bid Form Sheet 1 where space is provided Address _______________________________________________________ _______________________________________________________ Telephone ( )____________________ Fax ( )_________________ Contractor's License Number ___________________________________________ Contractor's License Expiration Date ____________________________________ Contractor's License Classification ____________________________________ Public Works Contractor Registration Number ________________________________

I HEREBY CERTIFY UNDER PENALTY OF PERJURY THAT THE ABOVE STATEMENTS ARE TRUE.

Bid and Certification Submitted on:

Signature of Authorized Representative:

Print or Type Name:

Title:

Rev 8/5/16

DESIGNATION OF SUBCONTRACTORS-No Requirement to Self-Perform Work

In accordance with the Public Contract Code, Part 1, Chapter 4, Subletting and Subcontracting, bidders must list the names and location of places of business of all subcontractors who will perform work or labor or render service to the bidder in an amount in excess of one-half of one percent (0.5%) of the total bid. In the case of bids for the construction of streets and highways, including bridges, list subcontractors for all work in an amount in excess of one-half of one percent (0.5%) of the total bid, or ten thousand dollars ($10,000) whichever is greater.

DESCRIPTION (Type of Work) SUBCONTRACTOR’S NAME BUSINESS LOCATION

CITY, STATE SUBCONTRACTOR’S

LICENSE NUMBER SUBCONTRACTOR’S

DEPARTMENT OF INDUSTRIAL RELATIONS

REGISTRATION NUMBER

(USE ADDITIONAL SHEETS IF NECESSARY)

Rev. 8/5/16

DESIGNATION OF SUBCONTRACTORS-LUMP SUM CONTRACTS


DESCRIPTION (Type of Work) PERCENTAGE (%)

OF TOTAL PRIME CONTRACTOR BID

AMOUNT

SUBCONTRACTOR’S NAME BUSINESS LOCATION CITY, STATE

SUBCONTRACTOR’S LICENSE NUMBER

SUBCONTRACTOR’S DEPARTMENT OF

INDUSTRIAL RELATIONS

REGISTRATION NUMBER


Rev 8/5/16

DESIGNATION OF SUBCONTRACTORS-UNIT PRICE CONTRACTS


BID

ITEM NO.

BID ITEM DESCRIPTION PERCENTAGE OF BID ITEM

SUBCONTRACTED

SUBCONTRACTOR’S NAME BUSINESS LOCATION CITY, STATE

SUBCONTRACTOR’S LICENSE NUMBER

SUBCONTRACTOR’S DEPARTMENT OF

INDUSTRIAL RELATIONS

REGISTRATION NUMBER


Kiefer Landfill 2017 Gas System Improvements Special Provisions section 01000 (special provisions).docx.doc Page 01000-1 July 2017

DIVISION 1 - GENERAL REQUIREMENTS

SECTION 01000 SPECIAL PROVISIONS

1.01 Scope of Work

The work for be performed under this contract includes furnishing all labor, materials, and equipment for construction of nine new vertical extraction wells, a 1,775 foot collection trench, and approximately 9,000 linear feet of collection piping at the Kiefer Landfill.

1.02 Project Location

Kiefer Landfill 12701Kiefer Boulevard Sloughhouse, Ca. 95683 1.03 Drawings

The contract drawings are entitled: Kiefer Landfill, 2017 Gas System Improvements, Contract #4386

1.04 Builder's Risk Insurance

Builder's Risk Insurance will not be required for this project.

1.05 Time of Completion

The time for completion of this contract shall be 50 working days commencing as specified in Section 7-1, “Beginning of Work,” of the Standard Construction Specifications.

1.06 Liquidated Damages

Liquidated damages shall be $500 for each calendar day delay. Refer to Section 8.10 of the County Standard Construction Specifications.

1.07 Pre-Bid Conference

A pre-bid conference will be held as noted in the NOTICE TO CONTRACTORS.


1.08 Standard Construction Specifications The County of Sacramento Standard Construction Specifications, adopted by the Board of Supervisors and effective January 2016, are hereby made part of these specifications. A copy of the Standard Construction Specifications may be obtained at the cashier's window in Room 101 of the County Administration Building, 827-7th Street, Sacramento. The project specifications 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.

1.09 Examination of Plans, Specifications, and Site of Work Direct pre-bid questions to Sacramento County Department of Waste Management and Recycling’s Project Manager, Jeremy Zuber at [email protected], and also Tim Israel at [email protected].

1.10 Accuracy of Drawings and Specifications The existing conditions depicted on the drawings and specifications 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.

1.11 LFG Collection System Shutdowns The Engineer shall be notified two (2) 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.

1.12 Storage of Supplies, Materials, Equipment, Etc. The Contractor shall obtain the prior approval of the Engineer for 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.




1.13 Construction Surveys

The Contractor shall be responsible for and shall perform all surveys and measurements necessary for layout and control of work. Surveys shall be performed in accordance with the requirements of Section 5-9.03 of the Standard Construction Specifications.

1.14 Testing Testing of soils, asphalt, concrete and aggregate shall be performed by the County in accordance with Section 5-16 Materials Sampling and Testing of the County Standard Construction Specifications. All other tests shall be performed and paid for by the Contractor as required in these contract documents.

1.15 Additional Sets of Contract Documents

Following execution of the Contract, the County will provide electronic files in .pdf format of contract specifications, drawings, and addenda to the Contractor. Hard copy sets of construction document sets will not be furnished.

1.16 Signs

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

1.17 Contractor's Field Office

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

1.18 Engineer's Field Office 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. 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 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.


F. Contractor's Access, Work and Storage Areas

1. Contractor to be limited to the area shown on the drawings. 2. The contractor shall coordinate with the Project Manager as to where the

set-up staging area will be located. 1.20 Erosion, Sediment, and Water Pollution Control

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. 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. 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.

1.21 Special Security Requirements

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

1.22 Schedule of Work and Limitations

A. Operations 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.


B. Coordination of Contract Work with Owner's Operation The Contractor shall coordinate the work of this contract through the Project

Manager assigned by the County or Engineer. Progress meeting will be conducted weekly in accordance with the county of Sacramento, Standard Construction Specifications, Section 7.3 Preconstruction Conference and Progress Meeting. The contractor shall submit a construction schedule and progress schedule in accordance with the County of Sacramento Standard Construction Specifications, Section 7.5.01 Progress Schedule.

C. Existing Landfill Gas (LFG) System

The Contractor shall coordinate all shutdowns of the existing LFG collection systems through the Project Inspector assigned by the County or Engineer. The Contractor shall make every effort to minimize the number of shutdowns during the course of the project. Shutdown of the systems shall be limited as follows:

• Any portion of the LFG collection system shall not be shutdown for more than 4 hours in a row.

D. Site Conditions The CONTRACTOR shall be responsible for having determined the site

conditions to his or her satisfaction, prior to the submission of a bid, the nature and location of the work, the conformation of the ground, the character and quality of the landfill, the type and quantity of materials to be encountered, the character of equipment and facilities needed preliminary to and during the execution of the work, the general and local conditions, and all other matters which can in any way affect the work under this Contract. The prices established for the work to be done will reflect all costs pertaining to the work. Any claims for extras based on landfill conditions or groundwater table conditions will not be allowed.

1.23 ALLOWABLE TIMES AND HOURS OF WORK

Work may be performed between the hours of 5 a.m. through 8 p.m., 7 days per week, excluding Legal Holidays.

1.24 NO WAIVER OF GOVERNMENT CLAIM PROCESS:

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

Excavated refuse shall be disposed of at the active face of the landfill between the hours of 6:30 and 4:30 Monday through Friday and 8:30 and 4:30 Saturday and Sunday. Any refuse not transported to the active cell must be covered by a plastic tarp overnight. No disposal fee will be charged for disposal.

1.26 Submittals

All submittals shall be made to the County/Engineer a minimum of seven days in advance the commencement of work. All submittals shall be provided digitally in a .pdf format. The County's/Engineer shall review and return submittals within 5 working days. Contractor shall make additional submittals as required. 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. The following submittals shall be made: Injury Illness Prevention Program Code of Safe Work Practices, Contract Specific Safety Plan Task Specific Safety Plan Water Pollution Control Plan Non-woven 8 oz geo-fabric Driller Qualifications Landfill Gas Well Aggregates Perforated Sch. 80 PVC Pipe and Fittings HDPE Pipe and Fittings Butterfly Valves 2-inch Poly Valves Wellhead Assemblies Flexible Hose Condensate Pumping Systems Bentonite Drilling and Asbuilt Logs

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Measurement and Payment section 01270 (measurement and payment).docx.doc Page 01270-1 July 2017

SECTION 01270 MEASUREMENT AND PAYMENT

PART 1 - GENERAL 1.01 Summary

A. 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.

1.02 Related Sections

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

Specifications.

1.03 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.

B. 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.

C. 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.

D. 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.


E. 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.

F. 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.

1.04 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.

1.05 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.

1.06 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 in 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, such work and materials or equipment shall be furnished in

greater or lesser quantities.


1.07 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.

1.08 Rejected Materials

A. Quantities of material wasted or disposed of in a manner not called for under the Contract. 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 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 rejected and unused materials from site.

1.09 Contract Bid Items REQUIREMENTS INCLUDED

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, equipment and labor necessary for the complete construction and installation of all work as described in these specifications 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.

Item 1. Mobilization and Demobilization. This task includes any and all temporary facilities and utilities, health and safety plans, 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 8-1 of the Standard Specification.


Item 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.

Item 3. Dual Phase Extraction Wellheads. Supply all materials,

equipment and labor for the construction of the dual phase extraction wellheads. This item includes installing a wellhead, pump, fittings, flex hoses and appurtenances as shown on the Construction Drawings. Payment for this item will be on a unit price (EA) basis.

Item 4. Boring Abandonment. Supply all materials, equipment and labor

for Boring Abandonment. Measurement shall be per linear foot for abandoned well borings from the maximum depth of the boring to ground surface. Payment for this item will be on a vertical foot (VF) basis.

Item 5. Horizontal Collector Trench. Supply all equipment, labor and

materials necessary for the trenching and construction of the horizontal collector trench and header connections as shown on the Construction Drawings. Perforated piping, fittings and 8 oz. non-woven geofabric shall be supplied by the contractor. TDA shall be supplied by the County from the existing stockpile. Payment for this item will be on a linear foot (LF) basis.

Item 6. 2” SDR 9 HDPE Pipe. Supply all materials, equipment and labor

for the construction and installation of 2-inch diameter SDR 9 HDPE recirculation pipe as shown on the Construction Drawings. Include all labor and materials for the SDR 9 HDPE pipe, fittings, and joining. Payment for this item will be made on a linear foot (LF) basis.


Item 7. 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. Payment for this item will be made on a linear foot (LF) basis.


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


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 connection to existing 12-inch HDPE header. Payment for this item will be made on a linear foot (LF) basis.

Item 10. 12” SDR 17 HDPE Pipe. Supply all materials, equipment and

labor for the construction and installation of 12-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 connection to existing 18-inch HDPE header. Payment for this item will be made on a linear foot (LF) basis.

Item 11. 8-inch Butterfly Valve Installation. Supply all materials,

equipment and labor for the installation of 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 a lump sum for each valve replaced (LS).

Item 12. 12-inch Butterfly Valve Installation. Supply all materials,

equipment and labor for the installation of 12-inch butterfly valve. Include all labor and materials for the butterfly valve, beveled flange adapters, flanges, fittings, and appurtenances. Payment for this item will be a lump sum for each valve replaced (LS).


Item 13. Condensate Pumping System. Supply all materials, equipment and labor for the installation of a condensate sump and, where shown on the design drawings, the installation of a butterfly valve on the upstream side of the LFG header. This item includes modification of the existing system piping and installing a single pump sump, fittings, hoses, valves and appurtenances as shown on the Construction Drawings. Payment for this item will be on a unit price (EA) basis.

Item 14. Surveying and Staking. This task includes any and all materials

and labor necessary to perform: construction staking and grade control of the collection trench. Contractor will be responsible for maintaining grade control and trench depth to the existing M1L liner. Payment for this item will be made on an Lump Sum (LS) basis. Payment shall be made in accordance with Section 8-1 of the Standard Specification.

Item 15. Dewatering. This task includes any and all materials and labor

necessary to perform: dewatering of any excavation where leachate is encountered and disposal of said leachate by spraying via water truck over the lined portions of M1L for dust control as directed by Engineer. Payment for this item will be made on an allowance (Allowance) basis. Payment shall be made in accordance with Section 8-2 of the Standard Specification.

Item 16. Substitute Aggregate for County Supplied TDA. Supply

substitute aggregate on a unit weight basis for the construction of the collector trench as shown on the Construction Drawings. Include all labor and materials for the substitute aggregate. Payment for this item will be made on a unit cost per ton (Ton) basis.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Layout of Work and Surveys section 01400 (layout of work and surveys).docx.doc Page 01400-1 July 2017

SECTION 01400 LAYOUT OF WORK AND SURVEYS

PART 1 - GENERAL 1.01 Summary

A. 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.

B. Before commencing and surveys, the Contractor shall give the County 2

working days written notice in advance so that the County may witness such work.

1.02 Related Sections

A. Section 01270 - Measurement and Payment and Section 5-9.03 of the Standard

Construction Specifications.

1.03 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.

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.

1.04 Surveys for Layout and Performance of Work

A. The Contractor shall perform all surveys for layout and performance of the work, reduce the field notes, make necessary calculations, and prepare drawings necessary to carry out suck work.

1.05 Surveys for Measurement for Payment

A. When the Technical Specification 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.


1.06 Surveys for As-Built Drawings

A. The Contractor shall perform a preconstruction topographic survey (topos) immediately prior to the start of work and as-built topos at the completion of the following: All underground piping. The as-built surveys for the collector trench area shall be performed at a minimum 50-foot grid with elevations also taken at grade break points. The location of the survey points for survey (top of cover soil) shall be taken directly above the survey point previously obtained (i.e., same nothing and easting). This as-built will be submitted on drawings to the County indicating location of survey point (i.e., nothing, easting, and elevation) and shall be stamped by a California Registered Professional Land Surveyor. The County shall have up to 2 working days to review and approve the as-built surveys. After final approval by the County, the Contractor shall submit two sets of final drawings and electronic copies for each survey. Final drawings shall present elevations of finished layers, and surveyed locations of all LFG wells, LFG piping, pipe bends and junctions.

1.07 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 Technical Specifications, and shall not otherwise relieve the Contractor of responsibility for measurements in compliance therewith.

Type of Line or Mark Horizontal Position Elevation Permanent Reference Points 1 in 10,000 ±0.01 foot General Excavation and 1 in 2,000 ±0.1 foot Earthwork C. Tolerances for designed depths and thicknesses shown on the Construction

Drawings and for Elevations shown on the Contract Drawings shall be ±0.10 foot, unless otherwise stated in these Technical Specifications or on the Drawings.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Condensate Pumping System Rev.0 Page 02000-1 July 2017

SECTION 02000 CONDENSATE PUMPING SYSTEM

PART 1 - GENERAL 1.01 Description

A. Work Included:

1. The work described in this section consists of furnishing all labor, materials, equipment, and incidentals necessary to install and test operate the condensate pumping system; all as shown on the Contract Drawings and as specified herein.

B. Related Work Specified Elsewhere:

1. Section 02750 – HDPE Pipe and Fittings.

1.01 Submittals

A. Complete specification, descriptive drawings, catalog cuts, and descriptive

literature which shall include make, model, dimensions, weight, fixtures, and for the condensate sumps.

B. Manufacturer's installation instruction.

C. All exceptions to the applicable requirements and Specifications provided in these Contract Documents.

D. An operation and maintenance manual shall be furnished at the completion of the project. The manual shall be prepared specifically for this installation and shall include all required catalog cuts, drawings, equipment list, description, and information necessary to instruct operating and maintenance personnel unfamiliar with such a system.

E. Manufacturer's warranty.

1.02 Safety Requirements

A. The Contractor shall be required to comply with the safety requirements as specified in Section 01000 – Special Provisions.


PART 2 - PRODUCTS 2.01 General

A. Contractor shall supply two Real Environmental Products 7000 Series Auto-Sumps (retrofit style) as shown on the Drawings, or approved equal. The Condensate pumping system shall be shop-built by a company normally engaged in the business of fabricating custom plastic pipe assemblies, by technicians trained and certified in fusion and extrusion welding techniques for HDPE pipe.

2.02 Pipe and Fittings

A. All pipe and fittings shall conform to the requirements of Section 02750 – Pipe, Tube and Fittings.

2.03 Pneumatic Pump

A. The pump installed as part of the Condensate pumping system shall be a self-controlling air-powered pump, model “VP4-BL”, manufactured by Viridian America, or approved equal.

PART 3 - EXECUTION 3.01 Delivery, Storage, and Handling

A. Condensate pumping system and all of its accessories, pipes, and fittings shall be off-loaded, stored, and handled with extreme care to avoid any structural damage to the system. All items shall be closely inspected for damage prior to off-loading. All damaged items shall be rejected and sent back immediately to the manufacturer/supplier. Damage occurring, as a result of storage or handling shall be cause for rejection.

3.02 Installation

A. Condensate Pumping System

1. It shall be the responsibility of the Contractor to coordinate the location of the pumping system and related appurtenances.

2. The system shall be installed strictly in accordance with the

manufacturer's instructions and recommendations in configuration shown on the Drawings.


3. The excavation shall conform to the requirements of Section 02400 – Excavation, Backfilling and Compaction.

3.03 Testing

A. Testing of Installed Equipment:

1. Prior to acceptance, an operational test of the condensate pumping system

shall be performed to determine if the installed equipment meets the purpose and intent of the specifications. Tests shall demonstrate that the equipment is not mechanically, structurally, or otherwise defective; is in safe and satisfactory operating condition; and conforms to the specified operating characteristics. Tests shall include checks for leaks in all piping and seals, correct operation of control systems and equipment.

2. If any deficiencies are revealed during any test, such deficiencies shall

be corrected and the pumps re-tested.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Waste Handling section 02111 (waste handling).docx.doc Page 02111-1 July 2017

SECTION 02111 WASTE HANDLING

PART 1 – GENERAL

1.01 Summary

A. The Contractor shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary to complete the Waste Handling during construction, including excavation of LFG wells and collector trench. The work will be carried out as specified herein and in accordance with the General Conditions and Drawings.

PART 2 – PRODUCTS

2.01 Materials

A. Waste material is defined as existing waste refuse located within the Kiefer Landfill. It does not include construction debris generated during implementation of the work.

PART 3 – EXECUTION

3.01 Preparation

A. The Contractor shall stake and flag locations of existing gas-extraction wells and associated condensate or monitoring devices so as to minimize the likelihood of damage to the existing gas-extraction system.

B. The Contractor shall protect benchmarks, existing utilities, and drainage structures, and fences from excavation equipment and construction traffic.

C. The Contractor shall, on a continuous basis, install check dams, pumps, and all means necessary to collect and dispose of liquid that comes in contact with waste, in accordance with Part 3.03. The Contractor shall make all necessary provisions to keep uncontaminated stormwater separate from liquid that come in contact, or has been in contact, with the waste.

3.02 General Waste Excavation and Disposal

A. Contractor shall load, haul, and dispose of excavated waste to the active working face of the landfill as designated by the Owner, 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.

B. Contractor shall be responsible for dust control related to construction activities.

Kiefer Landfill 2017 Gas System Improvements Waste Handling section 02111 (waste handling).docx.doc Page 02111-2 July 2017

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 project manager) during the construction.

3.03 Drainage

A. At all times during construction, the Contractor shall provide and maintain proper equipment and facilities to remove all water entering the construction area so as to obtain and maintain satisfactory working conditions.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Landfill Gas Collection Well Aggregate section 02250 (lfg collection well aggregate).docx.doc Page 02250-1 July 2017

SECTION 02250 LANDFILL GAS COLLECTION WELL AGGREGATE

PART 1 – GENERAL

1.01 Summary

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 General Conditions and Drawings.

1.02 Submittals

A. The Contractor shall submit to the Engineer for approval, at least 7 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.

1.03 Quality Assurance

A. The Contractor shall ensure that the materials and methods used for aggregate meet the requirements of the 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 – PRODUCTS

2.01 Aggregate

Aggregate shall be graded as follows: 100 percent passing 2-inch and 5 percent passing ½-inch.


3.01 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.

Kiefer Landfill 2017 Gas System Improvements Landfill Gas Collection Well Aggregate section 02250 (lfg collection well aggregate).docx.doc Page 02250-2 July 2017

3.02 Placement

A. The Contractor shall place to the lines, grades, and dimensions shown on the 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.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Excavation, Backfilling, and Compaction Rev.0 Page 02400-1 July 2017

SECTION 02400 EXCAVATION, BACKFILLING, AND COMPACTION

PART 1 – GENERAL

1.01 Description A. Work Included:

1. The work described in this section consists of furnishing all labor, materials, equipment, and incidentals necessary for excavating, grading, backfilling, and compacting, complete as shown on the Contract Drawings and as specified herein.

B. All work under this section, as applicable, shall comply with the requirements of the Standard Construction Specifications, Revised January 2016, as published by County of Sacramento, Municipal Services Agency, with exceptions and special requirements as set forth herein in the Special Provisions.

1.02 Federal and State Regulatory Requirements A. All trench excavations which exceed 5 feet in depth shall comply with the applicable

trench safety standards as stated in the OSHA excavation safety standards 29 CFR S.1926.650 Subpart P.

1.03 Job Conditions A. Protection of Existing Items:

1. All bench marks, monuments, and other reference points shall remain undisturbed unless specifically directed otherwise by the County.

B. Coordination with Others:

1. Contractor shall give adequate prior notice to the County, utility agencies, and other legal authorities prior to starting work.

2. Contractor shall coordinate his operations with other trades, utility firms, and other affected public departments to assure continuity for both access and service of all utility service distribution lines, in conformance with applicable requirements of these organizations. Services to adjacent, adjoining property shall not be impeded.


PART 2 – PRODUCTS

2.01 Materials A. General:

1. On-site excavated materials may be used where approved by the County.

2. Rocks larger than 4 inches in diameter, trash, and objectionable materials shall be removed from all fills to be compacted.

B. Fill Materials:

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

2. Controlled Low Strength Material (CLSM): CLSM backfill shall conform to Section 50-15.02 of the Standard Construction Specifications, Revised January 2016, as published by County of Sacramento, Municipal Services Agency.


3.01 Inspection A. Verification of Existing Conditions:

1. 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.

2. Should any omissions, conflicts, or ambiguities in the Specifications 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 project manager prior to construction. The questions will be reviewed and, where the information sought is not clearly specified or indicated on the Drawings, a clarification will be issued which shall become a part of the Construction Documents.

3.02 Protection

A. Pumping and Drainage: 1. 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.


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

undisturbed bearing capacity of subgrade soils at the bottom of the excavation. 3. Dewatering may be accomplished by means of submersible pumps. trash pumps,

settling tanks, transfer pumps, and water trucks/tankers 3. 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 project manager, at no cost to County.

4. 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 project manager. Any leachate collected from any excavation will be collected and may be used as dust control over the lined portion of M1L as directed by the Engineer. Any damage to facilities shall be repaired or restored as directed by the project manager, at no cost to County.

3.03 Excavation, Backfill, Fill Placement and Compaction

A. Materials:

1. Materials placed in backfill shall be free from rocks or stones larger than 1 inch, as well as brush, stumps, logs, roots, debris, and organic or other deleterious materials; and must be approved by the County.

A. Excavation and Backfilling:

1. If the bottom of any excavation is taken below the limits shown on the Contract Drawings or specified or directed by the Engineer, it shall be refilled at the Contractor's expense with the materials specified in Item 2.01.

2. 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 Contract Drawings, is unsuitable for foundation, it shall be, removed to such depth and width as he may direct and replaced with suitable material.

3. No trench shall be allowed to remain open overnight, unless otherwise approved

by the County.


4. Maximum length of open trench at any time shall be 200 feet, or as directed by

the Engineer. 5. Bedding shall be placed to a depth of 6 inches below the bottom of pipe and shall

be thoroughly compacted. 6. As soon as practical after the pipe has been laid, jointed, and tested, backfilling

shall begin and thereafter be prosecuted expeditiously. 7. Excavations shall be backfilled to the original grades or as indicated on the

Contract 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.

3.04 Excess Excavated Materials

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

B. All debris, junk, stones, refuse, 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.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Vertical Landfill Gas Wells section 02600 (vertical lfg wells).docx.doc Page 02600-1 July 2017

SECTION 02600 VERTICAL LANDFILL GAS WELLS

PART 1 – GENERAL

1.01 Description of Work

A. The Contractor shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary for the installation of vertical landfill gas wells on this project. The work will be carried out as specified herein and in accordance with the General Conditions and Drawings.

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

1.02 Submittals

A. The Contractor shall submit driller qualifications, including the driller’s license number.

B. The Contractor shall submit to the Engineer for approval, at least 7 days prior to the start of construction, Certificates of Compliance for proposed bentonite grout materials, which indicate meeting the material requirements of this Section.

C. The Contractor shall furnish the Project Manager with a drilling log prepared at the site and including the following information:

1. Name of supervising professional engineer, registered geologist, or other qualified person completing the form.

2. Description of materials encountered, including generalized composition, level of decomposition, and level of compaction.

3. Assessment of moisture in materials and solid to liquid ratio if free liquid is present.

4. Time, depth (5-ft increments typically), refuse description and description of unusual occurrences or problems during drilling.

D. The Contractor shall submit to the Project Manager a final well as-built log, including the following information:

1. Borehole diameter.

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

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

4. Perforated or screened interval.


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

6. Name of supervising professional engineer, registered geologist, or other qualified person completing the form.

PART 2 – PRODUCTS

2.01 Vertical Wells

A. The Contractor shall provide pipe, aggregate, and bentonite grout that meets the requirements of the Drawings and these Technical Specifications

B. Piping and fittings shall be schedule 80 PVC pipe conforming to ASTM Standard D 1784. Screened interval of the piping shall be perforated in accordance with the drawing detail.

2.02 Materials - Bentonite

A. The bentonite shall be high-swelling, sodium montmorillonite (in pellet or powder form) containing no added organic polymers. The material shall exhibit the following properties:

1. Grain size: 80% passing the #200 Sieve per ASTM D-122.

2. Plasticity Index: 54 per ASTM D-4318.

3. Expansion Index: 289 per UBC 29-2

B. Water should be added to the bentonite at a ratio of 1 gallon for every 2 pounds of bentonite, to allow for proper hydration. Water added to bentonite shall be of suitable quality and free of pollutants and contaminants.


3.01 General

A. The Contractor shall install the Vertical Wells to the lines and grades indicated on the Drawings.

3.02 Drilling

A. Drilling Methods: The Contractor shall provide a minimum borehole diameter of 30-inches for each LFG well to the depth indicated in the Drilling Schedule shown on the Drawings.

B. Boring Depths: Actual depths will depend on conditions encountered during drilling. An estimated drilling schedule is provided on the Drawings. The County shall complete a construction survey to verify the surface elevation, and well bore depth at each proposed well location prior to drilling.


C. Boring Cover: When the boring construction activities are inactive, the Contractor shall cover the boring . At a minimum, the boring shall be covered with ¾-inch plywood sheeting, plastic sheeting, and soil on the edges. These actions are intended to limit air intrusion into the landfill.

D. Obstructed Borings: If obstructions are encountered during borehole advancement, the Contractor shall continue drilling until it is demonstrated that further efforts to advance the borehole are impractical. The Project Manager will determine which of the following courses of action will be taken:

1. Abandonment: The Contractor shall abandon the borehole by backfilling with silty soil at the direction of the Project Manager. The Contractor shall relocate borehole at the direction of the Project Manager. No submittals will be required. The Contractor shall be paid per linear foot of abandoned boring in accordance with Section 1270.

2. Complete Well: The Contractor shall complete install of the well to the depth obtained.

E. No drilling muds can be used for the construction of these wells.

3.03 Well Installation

A. The Contractor shall drill the borehole to permit the installation of the casing and perforated pipe assembly in a plumb and true line.

B. Casing and Perforated Pipe: The well casing shall be bell-joint schedule 80 PVC solvent welded and joined with ½” long screws, as indicated on the Drawings. The Contractor shall center the well casing and perforated pipe in the borehole. The Contractor shall maintain the well casing and perforated pipe vertically plumb during backfilling of the borehole. Lengths vary, as indicated on the Drawings, and will be determined based on data obtained during drilling activities. Perforations milled 0.020 slotted pipe as indicated on the Drawings.

C. Landfill Gas Collection Aggregate: To prevent bridging, the Contractor shall pour aggregate gradually and carefully into annular space to the design level above the top of the well screen, as determined by volume measurements and sounding with a weighted tape; sound enough so that placement is accurate to within 0.2 foot.

D. Bentonite Seal: The Contractor shall pour the bentonite gradually and carefully to the design level, as indicated on the Drawings, above the top of the gravel pack, as determined by volume measurements and sounding with a weighted tape.

1. The Contractor shall place bentonite only when gas well collection piping installation is complete, including all CQC and CQA work.


2. The top of the bentonite seal shall be sounded to ensure that no bridging occurred during placement.

E. Clean Backfill: The Contractor shall add clean, silty backfill as shown on the Drawings no earlier than 1/2 hour following placing the bentonite seal.

F. The Contractor shall attach the appropriate fittings and/or wellhead as shown on the Drawings.

G. The Contractor shall connect the vertical gas well to the gas header pipe according to the Drawings.

H. The Contractor shall sound the completed wells with a County representative present, to confirm the well is constructed as specified.

I. The Contractor shall complete well installation activities in a timely fashion. Boring construction shall not be inactive for a period exceeding 18 hours.

END OF SECTION

Kiefer Landfill 2017 Gas extraction wells and Piping Instalation Vertical Wellhead Assembly with Gate Valve SECTION 02650 (WELLHEAD ASSEMBLY).DOCX Page 02650-1 July 2017

SECTION 02650 WELLHEAD ASSEMBLY

PART 1 – GENERAL

1.01 Summary

A. The Contractor shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary for the Wellhead Assembly used on this project. The work will be carried out as specified herein and in accordance with the General Conditions and Drawings.

1.02 Submittals

A. The following documentation shall be submitted by the Contractor to the Engineer for approval, prior to construction:

1. Manufacturer’s Installation and Operation Manual.

2. Manufacturer’s Warranty Information.

1.03 Quality Assurance

A. The equipment must have at least five years of proven landfill gas performance.

PART 2 – PRODUCTS

2.01 General Product Description

A. The LFG collection system wellheads shall consist of: a 6-inch QED Environmental dual extraction well cap, model #GWC6284, a 2-inch QED Environmental Quick Change Orifice Plate Wellhead™ vertical wellhead assembly, model #ORP-215, an easy level indicator, and a pneumatic liquids extraction pump, model # QED AP4+B, and fittings or approved equals.

B. The equipment shall be capable of withstanding the rigors of landfill gas recovery application, including internal high vacuum, weathering, and gas constituent and ultraviolet light exposure.

C. The wellhead shall be tight and leak free and shall be height adjustable in the field using adapter bushings.

D. The wellhead assembly shall be capable of being used with the CES-Landtec GEM-5000™ and GEM-2000™ Gas Extraction Monitor incorporating all GEM™ monitoring functions or equivalent.

E. It is the intent of this Specification that the wellhead assembly shall be supplied as a complete manufactured unit.


2.02 Materials

A. This Section describes the acceptable materials that shall be used for the construction of the vertical wellhead. In lieu of orifice plates, other flow measurement devices (measurement and impact tubes – see below) may be used with approval of Engineer.

B. Measurement Tube (vertical wellhead):

1. The measurement tube shall be Schedule 80 PVC pipe and shall fit concentrically into the well casing.

2. The measurement shall be of sufficient length to allow gas to achieve a uniform velocity profile before being measured.

C. Impact Tube:

1. The impact tube shall be Type 316 stainless steel.

2. A stainless steel centralizer shall be installed on the impact tube.

3. The entrance of the impact tube shall be in an area of uniform gas flow.

D. Fittings:

1. PVC fittings shall be Schedule 80 socket fittings. Adapters shall be Elastomeric Polyvinyl Chloride.

2. Stainless steel fittings shall be Type 304 or 316 stainless steel, or approved equivalent.

E. Quick Connect Ports:

1. Quick connect ports shall be positive sealing and shall be constructed of polypropylene, stainless steel, or chrome-plated brass.

F. Valve:

1. The 2-inch flow control valve shall have a PVC body with fittings, seats, and seals of inert materials.

G. Pneumatic Pump

1. The pump installed as part of the dual-phase extraction wellhead shall be a self-controlling, air-powered pump, model AP4+B, manufactured by QED Environmental, or approved equal.


H. Flex Connector:

1. A flexible hose connector shall be used to connect the wellhead to the well lateral or collection header.

2. The flexible hose connector shall be QED Environmental Solarguard™ or approved equal.

3. All flex hose connections shall be secured using Power Lock clamps with banding or approved equal.

I. Nuts, Bolts, and Gaskets:

1. For aboveground installation, nuts and bolts shall be, galvanized steel, or zinc plated.

2. For belowground installation, nuts and bolts shall be Type 304 stainless steel.

J. Adapter Boot:

1. The adapter boot for connection to the well casing to the wellhead assembly shall be a 4-inch by 3-inch rubber reducer. Fernco or approved equal.

K. Tag:

1. Each vertical extraction wellhead shall be equipped with a metallic tag stamped with the Well ID and total depth.

2.03 Performance Specifications

A. Volumetric Flow Rating:

1. The nominal flow capacity of the wellhead shall be:

Wellhead Nominal Size (inches)

Minimum Flow (CFM)

Maximum Flow (CFM)

2 0 125

B. Pressure Design Ratings:

1. The wellhead shall be designed to withstand a vacuum of 100 inches of water.


3.01 Installation

A. Installation requirements:

1. The Contractor shall handle the wellhead according to Manufacturer’s Instructions.


2. Where the wellhead connects directly to the collection header, the Contractor shall install a branch fusion saddle fitting on the header in accordance with accepted methods and standards appropriate for the header material. The Contractor shall connect the wellhead to the header branch fitting in accordance with the Manufacturer’s Written Instructions and as shown on the Drawings. The Contractor shall use adapters as recommended by the Manufacturer.

3. All flex hose connections shall be secured using Power Lock clamps with banding or approved equal.

3.02 Testing

A. After installing the wellhead, the Contractor shall perform the following minimum tests:

1. Test static and impact pressure ports.

2. Test valve.

3.03 Acceptance

A. Prior to acceptance, the Contractor shall make the following verifications:

1. Verify that the wellhead is installed per the Manufacturer’s Written Instructions, Drawings, and these Specifications.

2. Verify that the wellhead has passed the tests specified in this Section.

3. Verify that Submittal requirements have been met.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements HDPE Pipe and Fittings section 02750 (hdpe pipe-fittings).docx.doc Page 02750-1 July 2017

SECTION 02750 HDPE PIPE, FITTINGS, AND VALVES

PART 1 – GENERAL

1.01 Summary

A. The Contractor shall furnish all labor, materials, tools, supervision, transportation, equipment and incidentals necessary for the piping, tubing, fittings, and valves used on this project. The work will be carried out as specified herein and in accordance with the General Conditions and Drawings.

1.02 Reference Standards

A. Where ASTM, ANSI or other standards are referenced, applicable requirements of the latest version shall apply.

1.03 Submittals

A. Requiring Submittals:

1. Items not specifically called for in the detailed pipe sections.

2. Any major relocations of piping from that detailed on the Drawings.

3. Any change of materials, jointing methods, or supports from that specified or detailed on the Drawings.

4. Complete manufacturer product information and specifications for all valves to be utilized in the project.

B. Not requiring Submittal:

1. Unless otherwise required, for piping which is installed in accordance with the Specification and the Drawings, pipe submittals will not be required prior to fabrication and installation.

1.04 As-Built Drawings

A. The Contractor shall prepare and submit two complete sets of As-Built Drawings, as specified in the General Conditions. They shall be separate, clean prints reserved for the purpose of showing a complete picture of the piping, valve work and supports, as actually installed. The Contractor shall include dimensions to adjacent landmarks such as fences and power poles. Upon completion of the work, these As-Built Drawings shall be signed by the Contractor, dated, and returned to the Engineer for approval.


PART 2 – MATERIALS

2.01 General Requirements

A. Pipe shall be standard weight pipe, unless noted or specified otherwise herein or on the Drawings.

B. Pipe will be slotted or perforated where used, as shown on the Drawings.

C. The Contractor shall follow piping runs shown on the Drawings as closely as possible, except for minor adjustments to avoid other piping or structural features. If major relocations are required, the Contractor shall obtain written approval from the Engineer.

D. The Contractor shall utilize materials that are new and in perfect condition; materials shall be of the same type and manufacture for similar use, unless otherwise approved. The Contractor shall not install any item or material for any purpose that is not recommended by the manufacturer. Workmanship shall be of the best standard practice of the trade.

E. Pipe and fittings shall contain no recycled compound except that generated in the Manufacturer’s own plan and from resin of the same specification as the raw material supplier.

F. Pipe and fittings shall be homogeneous throughout and free of visible cracks, holes, foreign inclusions or other injurious defects. They shall be uniform in color, capacity, density and other physical properties.

G. The following information shall be continuously marked on the pipe, or spaced at intervals not exceeding 5 feet:

1. Name and/or trademark of the pipe manufacturer.

2. Nominal pipe size.

3. Standard Dimensional Ratio (SDR) or pipe Schedule.

4. Material designation (e.g. PE 4710).

5. Production code for which date and place of manufacture can be determined.


2.02 Pipe, Tube and Fittings

A. High Density Polyethylene

1. HDPE pipe and fittings shall be made from a polyethylene resin Type 4710 compound, manufactured with ultraviolet inhibitors, with a Cell Classification of 445574C, per ASTM-D3350. The pipe shall be manufactured in strict compliance to ASTM F-714 and ASTM D-3035.

2. The Standard Dimension Ratio (SDR) for the HDPE pipe shall be as noted in the project drawings.

3. The HDPE pipe fittings shall have the same specifications and pressure ratings of the HDPE pipe. Fittings having a different wall thickness than the pipe shall not be used.

4. HDPE pipe elbows and tees shall be molded type. Fabricated type elbows and tees shall not be used.

5. HDPE pipe and fittings will not be painted.

B. Ball Valves

1. HDPE ball valves shall be made from a polyethylene resin Type 4710 compound, manufactured with ultraviolet inhibitors. The valves shall be manufactured in strict compliance to ASTM D-2513 or ASTM B16.40.

2. The HDPE ball valves shall have the same specifications and pressure ratings of the HDPE pipe.

3. HDPE ball valves shall have molded body construction with butt fusion connections, acetal stem and polypropylene ball and operator.

4. HDPE ball valves shall be full port type.

5. HDPE ball valves will not be painted.


C. Butterfly Valves

1. Butterfly valves shall be 150 lb. flat-faced flanged UV treated PVC butterfly valves with polypropylene disk, 316 stainless steel (SS) stem, and Viton liner or approved equal.

2. Beveled flange adapters or beveled spacers shall be used to allow valve unrestricted movement through full disc rotation.

3. All bolting for valves installed above grade shall be zinc plated and for buried valves shall be 316 SS.

4. Butterfly valves 10 inches or greater in diameter shall have a gear operator. Butterfly valves with a diameter less than 8 inches shall have a 10 position locking handle.

5. All valves and gear operators shall be right hand close.


3.01 Storage and Handling

A. The Contractor shall handle pipe, fittings, valves and accessories in a manner that will ensure installation in sound, undamaged condition; equipment, tools, and methods used in unloading, reloading, hauling and laying pipe and fittings shall be such that the materials are not damaged and in a manner as to avoid shock. Pipe and fittings shall not be dropped or dumped.

B. The Contractor shall provide slings with protective sleeves in order to protect the pipe surface; hooks inserted in ends of pipe shall have broad, well-padded contact surface.

C. The Contractor shall provide adequate storage for all materials and equipment delivered to the job site. Pipe, fittings and appurtenances shall be stored in a flat, horizontal position and/or per Manufacturer’s Instructions, until ready for installation. Protect from direct sunlight for extended periods of time.

3.02 Installation

A. The Contractor shall check all physical clearances between the piping, support system and structures and shall locate these to not interfere with open accesses or with maintenance or disassembly of equipment.

B. The Contractor shall give special attention to the appearance of the completed installation and make provisions for the expansion and contraction of the pipe fittings and joints during normal operation; great care shall be exercised to prevent the destruction of passage ways.


3.03 Manufacturer’s Instructions

A. Manufacturer’s Instructions and recommendations shall apply to installation of piping, unless otherwise specified. When requested by the Engineer, the Contractor shall furnish the manufacturer's printed installation instructions before pipe installation.

3.04 Cleaning

A. The Contractor shall thoroughly clean the interior of pipe and fittings of all foreign matter before being installed and they shall be kept clean until the work has been accepted. Joint contact surfaces shall be kept clean until the jointing is completed.

B. The Contractor shall take every precaution to prevent foreign material from entering the pipe while it is being installed; no debris, tools, clothing, or materials shall be placed in the pipe.

C. Gas piping headers and laterals will be under vacuum after installation. The Contractor, therefore, shall make special effort to prevent dirt, pipe shavings, or other materials from being drawn into these pipes.

D. After installation, the Contractor shall clean all newly installed piping and flush with water of all debris.

3.05 Cutting

A. The Contractor shall perform cutting in a neat manner without damage to the pipe or lining; pipe cuts shall be smooth, straight, and at right angles to the pipe axis.


3.06 Pipe Joining

A. High Density Polyethylene:

1. All pipe fusion shall be performed by a supplier or factory-supplied and/or certified fusion operator. Only fully-trained personnel will be allowed to perform the installation, supervision or inspection of HDPE fusion joints.

2. The Contractor shall join the HDPE pipe by method of thermal butt fusion, outlined in ASTM D-2657, or saddle fusion, depending on the type of joint. Of particular importance, the Contractor shall use the proper interface pressures and heater plate temperatures.

3. The Contractor shall not perform pipe fusion in water or when trench conditions are unsuitable for the work. The Contractor shall keep water out of the trench until joining is completed. The Contractor shall secure open ends of pipe and close valves when work is not in progress, so that no trench water, earth, or other substance will enter the pipe or fittings. The Contractor shall plug, cap, or valve pipe ends left for future connections.

4. In order to allow the joining operation to continue in adverse weather conditions, a shelter may be required for the joining machine. Particular caution should be exercised to prevent water from entering the pipe and from coming in contact with the heater plate and electrical connections. All electric lines used in field operations shall be fitted with ground fault current interrupters (GFCI).

3.07 Inspection

A. The Contractor shall carefully examine pipe and fittings for cracks and other defects while suspended, immediately before installation in final position. Spigot ends of pipe shall be examined with particular care. Defective, damaged, or unsound pipe and fittings shall be rejected and removed from the work site, by the Contractor.

B. The installed pipe shall be inspected for leaks while the pipe is under vacuum. Any detected defects shall be immediately repaired.

PART 4 – MEASUREMENT AND PAYMENT

4.01 General

A. Measurement and payment shall be in accordance with Section 1270 of the project specifications.

END OF SECTION

Kiefer Landfill 2017 Gas System Improvements Pressure Testing of Pipe section 02800 (pressure testing of pipe).docx.doc Page 02800-1 July 2017

SECTION 02800 PRESSURE TESTING OF PIPE

PART 1 – GENERAL

1.01 Requirements Included

A. Leak testing shall be conducted by the Contractor on the following lines:

1. All LFG extraction piping installed by Contractor.

2. All liquids distribution piping installed by the Contractor.

3. All air distribution piping installed by the Contractor

B. The procedure and equipment to be used shall be approved by the Engineer prior to testing. The Contractor shall perform leakage tests on all piping after installation and before backfilling where pipe is buried or encased. The Contractor shall test the entire gas extraction system after all pipes are cleaned and buried.

PART 2 – TESTING EQUIPMENT

2.01 General

A. The Contractor shall provide necessary piping connections between the section of line being tested and the nearest available source of air, or test fluid, together with test pumping equipment, pressure gauge and other equipment, materials and facilities necessary to make the specified tests. The Contractor shall provide temporary sectionalizing devices and vents as required for testing. Vents are to be left plugged if not required for the permanent installation.


3.01 Testing Procedure

The following Procedures will be performed by the Contractor, as outlined below:

A. The specified test pressures shall be as measured at the horizontal centerline of the lowest point of the piping under test.

B. Each pipeline shall be adequately braced and supported before tests are made. Partial backfilling between joints of pipelines in trenches is permissible to prevent movement under test pressure, subject to approval by the Engineer.


C. Pipelines that have no valves may be closed with blind flanges or caps on the ends of the section to be tested. Discrete sections of the system can be pressure tested separately in order to isolate leaks. However the final pressure test may be performed on large sections of the system.

D. Tests shall be made before the piping has been enclosed in any manner that will prevent inspection during the test.

E. Leakage testing for the LFG extraction system piping shall be performed by pressurizing piping to 10 psig and holding for one hour with no more than 0.5 psig pressure drop within that time frame. Allowable pressure drop will be revised for pipe sections longer than 500’ in order to maintain intended test sensitivity.

1. A soap and water solution (leak detection fluid) must be applied to all joints and the joints inspected for leakage by the formation of bubbles at the point of leakage. Any leaks detected must be repaired even if the test meets the set requirements. All of these lines, either individually or in common, are to be pressurized to 10 psig.

2. All joints and connections shall be visually inspected for leaks after applying the leakage detecting fluid.

F. The Contractor, at his own expense, shall make necessary repairs or replacements in accordance with the Specifications. Repairing and testing shall be repeated until the pipeline installation conforms to the specified requirements and is acceptable to the project manager.

G. After the test has been concluded, the pipeline shall be restored to a condition satisfactory to the project manager.

H. It is intended that piping, whether tested after installation or not, shall be air-tight and free from visible leaks.

I. Pumps, instrumentation and similar equipment shall not be subjected to the pressure tests.

J. All pressure testing performed shall be witnessed by the County Representative. The Contractor shall maintain a record of all pressure tested components. Each line item of the record shall be accepted by the Engineer. Acceptance of the pressure test by the Engineer shall not release the Contractor from its warranties.

K. Upon completion of the backfilling operation the contractor shall certify that the piping system has not been damaged during the backfill operation or construction.


PART 4 – MEASUREMENT AND PAYMENT

4.01 General

A. There shall be no separate measurement and payment for items listed within this Section.

END OF SECTION

SPECIFICATIONS FOR CONTRACT NO. 4386 KIEFER LANDFILL …

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