TABLE OF CONTENTS
No. of
Section Title Pages
02208 Chain Link Fencing ... 3
02218 Wire Grid Fencing ... 2
02221 Excavating Soil ... 2
02222 Engineered Fill and Final Cover ... 3
02223 Test Pad ... 3
02227 Rock Armour/Erosion Layer ... 3
02230 Surface Water and Drainage Systems ... 2
02780 Gas Probe Extensions ... 4
02790 Gas Probe Decommissioning ... 2
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02208
CHAIN LINK FENCING Page 1 of 3
SECTION 02208 CHAIN LINK FENCING PART 1 GENERAL
1.1 SECTION INCLUDES:
A. Remove existing fence and install new chain link fencing and appurtenances as complete units including necessary erection accessories, fittings, and fastenings as shown on Construction Drawings and ADOT details. Chain link fencing is required to be constructed on the side that faces the road (north).
1.2 RELATED SECTIONS
A. Section 02218 – Wire Grid Fencing B. Section 02221 – Excavating Soil
C. Section 02222 – Engineered Fill and Final Cover D. Section 02227 – Rock Armor/Erosion Layer
1.3 REFERENCES
A. Arizona Department of Transportation Standard Specifications for Road and Bridge Construction Section 902, and ADOT STD Details C-12.10.
1.4 DELIVERY, STORAGE AND HANDLING
A. Comply with pertinent provisions of Section 01600.
PART 2 PRODUCTS 2.1 PRODUCT DATA
A. Submit manufacturer's technical product data, and installation instructions for metal fencing, fabric, and accessories.
B. Dimensions indicated for pipe, roll-formed, and H-sections are outside dimensions, exclusive of coatings.
2.2 MATERIALS
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02208
CHAIN LINK FENCING Page 2 of 3
A. As per ADOT Standard Specifications Section 902, and ADOT STD Details C-12.10.
1. Height: As shown on the Construction drawings.
B. Fittings and Accessories:
1. As per ADOT Standard Specifications Section 902, and ADOT STD Details C-12.10.
C. Framing and Accessories:
1. As per ADOT Standard Specifications Section 902, and ADOT STD Details C-12.10
D. Wire Ties:
1. As per ADOT Standard Specifications Section 902, and ADOT STD Details C-12.10
E. Concrete:
1. As per ADOT Standard Specifications Section 902, and ADOT STD Details C-12.10
F. Signs: Supply securing signs meeting general requirements specified by CITY.
G. Gate: Gate to comply with ADOT STD Specifications 902, and ADOT STD Details C-12.10.
PART 3 EXECUTION 3.1 PREPARATION
A. Verify that any existing plant life designated to remain is tagged and identified.
B. Verify plants to be salvaged are tagged or identified.
3.2 POST-HOLES
A. Excavate post-holes to the minimum depth and diameter as shown on the Construction Drawings or as recommended by fence MANUFACTURER.
3.3 INSTALLATION
A. Install in accordance with ASTM F 567 and written installation
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02208
CHAIN LINK FENCING Page 3 of 3
instructions of fencing MANUFACTURER to provide secure and aligned installation.
B. Construction of the six foot high chain link fence shall be performed in a manner that conforms to the applicable provisions of Section 902, "Chain Link Fence", of the Arizona Department of Transportation Standard Specifications for Road and Bridge Construction, and ADOT STD Details C-12.10.
C. The fence line locations shall be located as shown on the Construction Drawings.
D. Concrete within post-holes shall be mounded and crowned to shed water away from the post.
E. The chain link fabric shall be fastened on the side of the posts facing the outside of the property.
F. The new chain link fence shall be permanently fastened to the existing fence in an appropriate manner, subject to approval by the ENGINEER.
G. Signs shall be installed at designated locations established by CITY.
H. If conflicts between the Construction Drawings, ASTM Standards, or State Specifications arise, the more stringent standard shall apply.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02218
CHAIN LINK FENCING Page 1 of 2
SECTION 02218 WIRE GRID FENCING PART 1 GENERAL
1.1 SECTION INCLUDES:
A. Remove existing fence and install or reinstall wire grid fencing and appurtenances as complete units including necessary erection accessories, fittings, and fastenings as shown on Construction Drawings and ADOT details. Wire grid fencing will be done on the three interior sides of the property (south, east, west).
1.2 RELATED SECTIONS
A. Section 02208 – Chain Link Fencing B. Section 02221 – Excavating Soil
C. Section 02222 – Engineered Fill and Final Cover D. Section 02227 – Rock Armor/Erosion Layer
1.3 REFERENCES
A. Arizona Department of Transportation (ADOT) Standard Specifications for Road and Bridge Construction (Section 903, and Standard Details C-12.10).
1.4 DELIVERY, STORAGE AND HANDLING
A. Comply with pertinent provisions of Section 01600.
PART 2 PRODUCTS 2.1 PRODUCT DATA
A. Comply with ADOT Standard Specifications for Road and Bridge Construction (Section 903, and Standard Details C-12.10).
2.2 MATERIALS
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02218
CHAIN LINK FENCING Page 2 of 2
1. Comply with ADOT Standard Specifications for Road and Bridge Construction Section 903, and Standard Details C-12.10.
Materials to be as good or better than existing materials.
2. Height: Height to be as heigh or higher than existing.
B. Signs: Supply securing signs meeting general requirements specified by CITY.
PART 3 EXECUTION 3.1 INSTALLATION
A. Construction of the fence shall be performed in a manner that conforms to the applicable provisions of ADOT Standard Specifications for Road and Bridge Construction Section 903, and Standard Details C-12.10.
B. The wire shall be fastened on the side of the posts facing the outside of the property.
C. Signs shall be installed at designated locations established by CITY.
D. If conflicts between the Construction Drawings, ASTM Standards, or State Specifications arise, the more stringent standard shall apply.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02221
EXCAVATING SOIL Page 1 of 2
SECTION 02221 EXCAVATING SOIL PART 1 GENERAL
1.1 SECTION INCLUDES
A. Excavating soil in the proposed borrow areas as shown on the Construction Drawings.
B. Excavating soil to construct final cover and run‐off conveyance system including roads, berms, and drainage channels as shown on the Construction Drawings.
C. Loading, hauling, and placing excavated material in stockpiles as needed.
1.2 RELATED SECTIONS
A. Section 02208 ‐ Chain Link Fencing B. Section 02218 ‐ Wire Grid Fencing
C. Section 02222 ‐ Engineered Fill and Final Cover D. Section 02227 ‐ Rock Armor/Erosion Layer E. Section 02230 ‐ Surface Water Drainage Systems PART 2 PRODUCTS
2.1 EXCAVATED FILL MATERIALS
A. Soil meeting requirements of Sections 02222, Part 2.1, and Part 2.2, to be placed as engineered fill and final cover.
PART 3 EXECUTION 3.1 PREPARATION
A. Provide water for dust control.
B. Protect benchmarks, existing structures, and fences from excavation equipment and vehicular traffic.
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest Rev 0 – April 2021
Section 02221 EXCAVATING SOIL Page 2 of 2
C. Provide for dewatering as necessary for finish excavation and fill placement, if required.
D. CONTRACTOR shall note that topography shown on Construction Drawings may differ from topography at time of construction.
E. The CITY may conduct third party survey verification of the pre‐
construction survey.
3.2 EXCAVATION
A. Excavate soil as required to maintain or minimize existing grades as necessary to place the engineered fill and final cover soil in accordance with Section 02222.
B. Grade the top perimeter of borrow area excavation to prevent surface water from draining into the excavation during construction.
E. Notify CITY of unexpected subsurface conditions and discontinue affected work in area until notified to resume work.
F. Provide dust control.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02222
ENGINEERED FILL AND FINAL COVER Page 1 of 3
SECTION 02222
ENGINEERED FILL AND FINAL COVER PART 1 GENERAL
1.1 SECTION INCLUDES
A. Engineered fill/foundation soil placement B. Fill for final cover
1.2 RELATED SECTIONS
A. Section 02110 ‐ Clearing and Stripping B. Section 02208 ‐ Chain Link Fencing
C. Section 02218 ‐ Wire Grid Fencing D. Section 02221 ‐ Excavating Soil
E. Section 02227 ‐ Rock Armor/Erosion Layer F. Section 02230 ‐ Surface Water Drainage Systems 1.3 REFERENCES
A. ASTM C‐136 ‐ Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates.
B. ASTM D‐422 ‐ Standard Test Method for Particle‐Size Analysis of Soil.
C. ASTM D‐698 ‐ Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft‐lbf/ft3 (600 kN‐m/m3)).
D. ASTM D‐1556 ‐ Standard Test Method for Density and Unit Weight of Soil in Place by the Sand‐Cone Method.
E. ASTM D‐2216 ‐ Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass.
F. ASTM D2487 ‐ Classification of Soils for Engineering Purposes (Unified Soil Classification System).
G. ASTM D‐2922 ‐ Standard Test Methods for Density of Soil and Soil‐Aggregate in Place by Nuclear Methods (Shallow Depth).
H. ASTM D6938 ‐ Standard Test Method for In‐Place Density and Water Content of
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02222
ENGINEERED FILL AND FINAL COVER Page 2 of 3
Soil and Soil‐Aggregate by Nuclear Methods (Shallow Depth).
PART 2 PRODUCTS
2.1 ENGINEERED FILL/FOUNDATION SOIL
A. Soil obtained from designated borrow areas as approved by the ENGINEER B. Free of organic material
C. Maximum particle dimension: 6 inches
D. Free of frozen material, ice, snow, or excessive moisture 2.2 FINAL COVER
A. Select fine grained soils obtained from borrow areas as provided and approved by the ENGINEER.
B. Maximum particle size of 3 inch.
PART 3 EXECUTION
3.1 EXISTING GRADE/FOUNDATION GRADE PREPARATION
A. Scarify subgrade soils to a 6‐inch depth prior to soil placement, and moisture condition to within 2% of optimum moisture as determined by ASTM 698A.
B. Prior to placement of final cover, foundation grade shall be compacted to a minimum of 95% of standard proctor as determined by ASTM 698A.
C. Prior to placement of engineered fill, verify that no substantial thickness of loose or uncompacted soil is present in the fill area.
D. Begin engineered fill only when the ENGINEER has accepted the underlying subgrade.
E. Stockpiling of soils with the boundary of the landfill is not allowed.
3.2 ENGINEERED FILL AND FINAL COVER PLACEMENT
A. Place engineered fill and final cover to the lines and grades shown on the Construction Drawings.
B. Place in loose lift thickness not exceeding 6 inches compacted thickness.
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02222
ENGINEERED FILL AND FINAL COVER Page 3 of 3
C. Compact each lift to a minimum of 95 percent relative compaction at a moisture content of ± 2% of optimum as determined by ASTM D‐698.
D. Engineered fill and final cover for the construction of the perimeter channels should be placed as shown on the Construction Drawings.
E. Finish grade the surface final cover layer with a motor grader or as approved by the CITY in preparation for placement of rock cover layer per Section 02227.
F. Grade final surface to a vertical tolerance of within + 0.1 foot.
G. Stockpiling of soils with the boundary of the landfill is not allowed.
3.4 FIELD QUALITY ASSURANCE
A. Field quality assurance (QA) will be performed in accordance with the Construction Quality Assurance (CQA) plan.
B. The CITY may perform additional testing to determine the conformance of the materials with these Specifications and the Construction Drawings.
C. The CITY may perform sampling and testing of excavated materials as they are stockpiled.
D. The CONTRACTOR shall cooperate fully with the CITY in performance of sampling and testing.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02223
ENGINEERED FILL AND FINAL COVER Page 1 of 3
SECTION 02223 TEST PAD PART 1 GENERAL
1.1 SECTION INCLUDES
A. Test Pad Construction 1.2 RELATED SECTIONS
A. Section 02221 ‐ Excavating Soil
B. Section 02222 ‐Engineered Fill and Final Cover C. Section 02227 ‐ Rock Armor/Erosion Layer D. Section 02230 ‐ Surface Water Drainage Systems 1.3 REFERENCES
A. ASTM C‐136 ‐ Standard Test Method for Sieve Analysis of Fine and Coarse Aggregates.
B. ASTM D‐422 ‐ Standard Test Method for Particle‐Size Analysis of Soil.
C. ASTM D‐698 ‐ Standard Test Method for Laboratory Compaction Characteristics of Soil Using Standard Effort (12,400 ft‐lbf/ft3 (600 kN‐m/m3)).
D. ASTM D‐1556 ‐ Standard Test Method for Density and Unit Weight of Soil in Place by the Sand‐Cone Method.
E. ASTM D‐2216 ‐ Standard Test Method for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass.
F. ASTM D2487 ‐ Classification of Soils for Engineering Purposes (Unified Soil Classification System).
G. ASTM D‐2922 ‐ Standard Test Methods for Density of Soil and Soil‐Aggregate in Place by Nuclear Methods (Shallow Depth).
H. ASTM D6938 ‐ Standard Test Method for In‐Place Density and Water Content of
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02223
ENGINEERED FILL AND FINAL COVER Page 2 of 3
Soil and Soil‐Aggregate by Nuclear Methods (Shallow Depth).
PART 2 PRODUCTS 2.1 FINAL COVER
A. Select fine grained soils obtained from borrow areas as provided and approved by the ENGINEER.
B. Maximum particle size of 3 inch.
PART 3 EXECUTION
3.1 ENGINEERED FILL AND FINAL COVER PLACEMENT
A. The purpose of the test pad is to develop procedures and equipment to achieve the permeability required. Once established these procedures and equipment shall be used for the rest of the final cover. Procedures include;
• The equipment and method of moisture conditioning soil.
• The equipment and method of achieving compaction.
B. The contractor shall submit a schedule to the ENGINEER prior to any work on the test pad to allow the engineer to verify the work according to the Coolidge Landfill Construction Quality Assurance Plan.
C. Place in loose lift thickness not exceeding 6 inches compacted thickness.
D. Compact each lift to a minimum of 95 percent relative compaction at a moisture content of ± 2% of optimum as determined by ASTM D‐698.
E. Stockpiling of soils within the boundary of the landfill is not allowed.
3.4 FIELD QUALITY ASSURANCE
A. Field quality assurance (QA) will be performed in accordance with the Construction Quality Assurance (CQA) plan.
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – April 2021 Section 02223
ENGINEERED FILL AND FINAL COVER Page 3 of 3
B. The CITY may perform additional testing to determine the conformance of the materials with these Specifications and the Construction Drawings.
C. The CITY may perform sampling and testing of excavated materials as they are stockpiled.
D. The CONTRACTOR shall cooperate fully with the CITY in
performance of sampling and testing. Include costs for assistance in unit or lump sum prices.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02227
ROCK COVER EROSION LAYER Page 1 of 3
SECTION 02227
ROCK ARMOR/EROSION LAYER PART 1 GENERAL
1.1 SECTION INCLUDES
A. Description of gravel mix for rock erosion layer to be placed on top of final cover.
Description of rock armor layer on the north and south slopes.
B. Work includes furnishing, loading, hauling, and placing the materials.
1.2 RELATED SECTIONS
A. Section 02208 ‐ Chain Link Fencing
B. Section 02218 ‐ Wire Grid Fencing
C. Section 02222 ‐ Engineered Fill and Final Cover D. Section 02230 ‐ Surface Water Drainage Systems 1.3 REFERENCES
A. ASTM C‐136 ‐ Standard Method for Sieve Analysis of Fine and Coarse Aggregates.
B. ASTM D‐2488 ‐ Standard Practice for Description and Identification of Soils (Visual‐
Manual Procedure).
1.4 SUBMITTALS
A. Submit a 50‐pound representative sample of the proposed gravel material within 2 weeks of proposed use.
PART 2 PRODUCTS
2.1 ROCK EROSION LAYER AND ROCK ARMOR LAYER A. Material obtained and imported from off‐site.
B. Free of organic or other deleterious material.
C. Material must be hard, durable, and not subject to degradation.
D. Material shall be a washed gravel meeting the gradation shown in Table 02227‐1.
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02227
ROCK COVER EROSION LAYER Page 2 of 3
TABLE 02227‐1
GRAVEL/ROCK ARMOR EROSION LAYER SIZE
SURFACE D50 Maximum Size
Rock Erosion 1.5” 3”
Rock Armor 3.0” 6”
PART 3 EXECUTION 3.1 PREPARATION
A. Verify that all necessary pre‐construction submittals such as conformance testing of the gravel material has been performed and approved prior to placement.
B. Establish lines and grades for placement of the drainage gravel in accordance with the Construction Drawings.
C. Grade and smooth existing final cover soil as needed in preparation for placement of gravel.
3.2 PLACEMENT – ROCK EROSION LAYER
A. For rock erosion layer: spread gravel at rate of 622 tons/acre (2.25 cf/sy) at a uniform thickness of approximately 3 inches over the completed final cover.
B. Place only when the underlying final cover has been placed in accordance with the Specifications and accepted by the CITY.
C. Place to lines and grades shown on the Construction Drawings.
D. Spread and place materials in a single lift.
3.3 PLACEMENT ‐ ROCK ARMOR LAYER
A. For rock armor layer: Loosely spread gravel over the finished final cover.
B. Place to thickness, lines and grades shown on the Construction Drawings.
C. Place in an uphill or cross‐slope direction.
3.3 FIELD QUALITY CONTROL
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02227
ROCK COVER EROSION LAYER Page 3 of 3
A. Loosely place erosion layer to the minimum thickness on top cover and side slopes.
B. At the completion of construction, the CONTRACTOR shall provide an as‐built survey drawing in digital form to the CITY that includes the survey point data demonstrating compliance with the Construction Drawings and Specifications.
C. After erosion layer has been placed, the CONTRACTOR shall protect the materials to prevent inundation from dirt and to prevent damage from other construction activities until the Work is complete and accepted by the CITY.
3.4 FIELD QUALITY ASSURANCE
A. Sampling and testing of materials to determine material type may be performed by the CITY at the stockpile, at the material source, or at the place of use in accordance with the CQA Plan.
B. The CITY will perform gradation tests of materials before and/or during placement in accordance with ASTM C136.
C. Contractor shall assist the CITY as necessary in collecting material samples and conducting tests.
D. CITY reserves the option of waving gradation specifications if products submitted by CONTRACTOR meet design intent.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02230
SURFACE WATER DRAINAGE SYSTEMS Page 1 of 2
SECTION 02230
SURFACE WATER DRAINAGE SYSTEMS PART 1 GENERAL
1.1 SECTION INCLUDES
A. Installation of drainage berms, and appurtenances associated with the erosion control and surface water drainage systems at the site as defined on the Construction Drawings.
1.2 RELATED SECTIONS
A. Section 02221 – Excavating Soil
B. Section 02222 – Engineered Fill and Final Cover C. Section 02227 – Rock Armor/Erosion Layer 1.3 REFERENCES
A. Arizona Department of Transportation (ADOT) Standard Specifications for Road and Bridge Construction Section 810.
B. ADOT Erosion and Pollution Control Manual.
C. ADOT Erosion/Sediment and Water Quality Best Management Practices (BMP) Details.
PART 2 PRODUCTS
2.1 ENGINEERED FILL AND SOIL BACKFILL
A. Engineered fill for soil backfill materials shall conform to the requirements of engineered fill in accordance with Section 02222.
PART 3 EXECUTION 3.1 PREPARATION
A. Set required lines, levels, contours, and datum by construction staking.
B. Provide for dust control.
C. Protect benchmarks, existing structures, and fences from excavation
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02230
SURFACE WATER DRAINAGE SYSTEMS Page 2 of 2
equipment and vehicular traffic.
3.2 INSTALLATION OF DRAINAGE STRUCTURES
A. Excavate the drainage channels and construct berms to the lines, grades, and dimensions shown on the Construction Drawings.
3.3 INSTALLATION OF SURFACE WATER BEST MANAGEMENT PRACTICES
A. Arizona Department of Transportation (ADOT) Standard Specifications for Road and Bridge Construction Section 810.
B. ADOT Erosion and Pollution Control Manual.
C. ADOT Erosion/Sediment and Water Quality Best Management Practices (BMP) Details.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02780
GAS PROBE EXTENSIONS Page 1 of 4
SECTION 02780 GAS PROBE EXTENSIONS PART 1 GENERAL
1.1 SECTION INCLUDES
A. The work to be performed includes the furnishing of all labor, material, transportation, tools, supplies, equipment and appurtenances, and the performance of all work required for extending (raising) existing gas probes in accordance with the Construction Drawings and these Specifications.
1.2 RELATED SECTIONS
A. Section 02221 – Excavating Soil
B. Section 02222 – Engineered Fill and Final Cover
C. Section 02790 – Gas Probe Decommissioning 1.3 REFERENCES
A. American Society for Testing and Materials (ASTM).
B. PPI ‐Plastic Pipe Institute.
C. ANSI ‐American National Standards Institute.
1.4 SUBMITTALS
A. The CONTRACTOR shall submit to the ENGINEER for approval the following data or material prior to purchase and use on the project:
1. Manufacturer’s specification sheet and physical data for the casing proposed to be furnished.
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02780
GAS PROBE EXTENSIONS Page 2 of 4
B. The CONTRACTOR shall submit complete a Work Plan for approval by the CITY and ENGINEER, which describes probe extension.
C. Upon completion of the installation, the CONTRACTOR shall provide as‐built documentation showing the length of the extension, the final probe configuration, and other data pertinent to the work performed.
PART 2 PRODUCTS 2.1 GENERAL
A. The CONTRACTOR shall furnish and install all PVC and steel cover casing, and related items as required for completion of the gas probe extensions as herein specified.
2.2 WELL AND GAS PROBE CASING
A. The gas probe casing shall be non‐perforated, sized as needed to match existing Schedule 40 PVC threaded pipe specifically manufactured for use in well construction as manufactured by Aardvark Corporation or equivalent. The PVC pipe shall meet all the requirements of ASTM F480.
B. Joints shall be threaded or fastened using an approved external coupling method (sleeve and clamp, etc.). The joining method shall not protrude into or otherwise interfere with the function of the gas probe or the sampling equipment. Glued joints shall not be allowed on the gas probe extensions. No PVC glue, paint, chemical cleaners, or volatile solvents of any kind shall be used in raising, fitting, or attaching gas probe extension elements.
2.3 BACKFILL
A. The backfill material for the gas probe casings shall be engineered fill or final cover meeting the requirements of Section 02222.
2.4 LOCKING COVER EXTENSIONS
A. Locking cover extensions shall consist of steel casing pipe matching the type and size of the existing covers currently in place for each gas probe to be extended.
PART 3 EXECUTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02780
GAS PROBE EXTENSIONS Page 3 of 4
3.1 GENERAL
A. This portion of the Specifications describes the procedures to be followed for installation of the extensions to the gas probes. The materials and locations shall be as shown on the Construction Drawings and in these Specifications.
3.2 NOTIFICATION
A. The CONTRACTOR shall be responsible to give at least 24 hours advance notice prior to performance of specific operations as follows for the probe:
1. Intent to start work on the installation at the site.
2. Scheduling the final setting of casing, and placement of backfill and locking cover extensions.
B. These minimum advance notification requirements are based on a normal sequencing and scheduling of work without unusual delays or interruptions. If delays or interruptions should occur, the ENGINEER shall be given as much advance notice as possible on the restart of work of the project.
3.3 CASING AND LOCKING COVER EXTENSION INSTALLATION
A. The gas probe extension shall be extended to the length shown on the Construction Drawings and modified as necessary to fit the field conditions as determined by the Engineer.
B. The casing shall be extended such that the top of the well head is at flush with the final cover surface.
C. The CONTRACTOR shall then weld on a new section of steel casing with a locking cover to the existing steel casing such that the top of the cover matches the top of extended pipe.
D. The CONTRACTOR shall then backfill the extension using final cover. The backfill shall be mounded around the new casing to a height of no less than 6 inches above original grade. The backfill shall be compacted in a manner that does not damage or otherwise disturb the installed casing to a minimum of 95%
relative compaction as determined by ASTM D698A.
3.4 PRODUCT PROTECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02780
GAS PROBE EXTENSIONS Page 4 of 4
A. The CONTRACTOR shall use all means necessary to protect all work, including all materials and completed work of other Sections.
B. In the event of damage, the CONTRACTOR shall immediately make all repairs and replacements necessary to the approval of the CITY or QA/QC Engineer at no additional cost to the CITY.
END OF SECTION
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02790
GAS PROBE DECOMMISSIONING Page 1 of 2
SECTION 02790
GAS PROBE DECOMMISSIONING PART 1 GENERAL
1.1 SECTION INCLUDES
A. The work to be performed includes the furnishing of all labor, material, transportation, tools, supplies, equipment and appurtenances, and the performance of all work required for decommissioning (capping) existing gas probe in accordance with the Construction Drawings and these Specifications.
1.2 RELATED SECTIONS
A. Section 02110 ‐ Clearing and Stripping B. Section 02221 – Excavating Soil
C. Section 02222 – Engineered Fill and Final Cover D. Section 02780 – Gas Probe Extensions
1.3 REFERENCES
A. American Society for Testing and Materials (ASTM).
1. ASTM F‐480 Standard Specification for Thermoplastic Well Casing and Couplings Made in Standard Dimension Ratios (SDR), SCH 40 and SCH 80.
1.4 SUBMITTALS
A. The CONTRACTOR shall submit complete a Work Plan for approval by the CITY and ENGINEER, which describes probe decommissioning procedures.
PART 2 PRODUCTS 2.1 GENERAL
A. The CONTRACTOR shall dispose all PVC and steel cover casing, and related items as required for completion of the gas probe
Coolidge Landfill
Final Closure Construction DIVISION 2 SITEWORK
Alta Southwest
Rev 0 – March 2021 Section 02790
GAS PROBE DECOMMISSIONING Page 2 of 2
decommissioning as herein specified.
PART 3 EXECUTION 3.1 GENERAL
A. This portion of the Specifications describes the procedures to be followed for decommissioning of the gas probes. The materials and locations shall be as shown on the Construction Drawings and in these Specifications.
3.2 NOTIFICATION
A. The CONTRACTOR shall be responsible to give at least 24 hours advance notice prior to performance of specific operations as follows for the probe:
1. Intent to start work on the decommissioning at the site.
B. These minimum advance notification requirements are based on a normal sequencing and scheduling of work without unusual delays or interruptions. If delays or interruptions should occur, the ENGINEER shall be given as much advance notice as possible on the restart of work of the project.
3.3 CASING AND LOCKING COVER EXTENSION INSTALLATION A. The CONTRACTOR shall cut or remove the existing steel
casing at least 2’ below foundation grade.
B. The gas probe shall be capped at least 2’ below foundation grades as shown on the Construction Drawings and modified as necessary to fit the field conditions as determined by the Engineer.
END OF SECTION
