Specification 15210 - High Density Polyethylene (HDPE) Pipe, Fittings, And Appurtenances Page 6 of 8
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b. All fasteners and back-up rings shall be Type 316 stainless steel below
grade, and zinc-plated steel above grade.
c. Align flanges or flange/valve connections to provide tight seal.
Gaskets are required for flange/valve connections.
Specification 15210 - High Density Polyethylene (HDPE) Pipe, Fittings, And Appurtenances Page 5 of 8
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B.
Acceptance of fittings, stubs, or other specially fabricated pipe sections shall be
based on visual inspection by ENGINEER and documentation of conformance to
this Section.
Prior to backfilling trench CONTRACTOR shall obtain as-built top of pipe
coordinates and elevations at grade changes, terminations, fittings, and at least
every 50 ft along the pipe.
3.2 INSTALLATION
A.
B.
Specification 15210 - High Density Polyethylene (HDPE) Pipe, Fittings, And Appurtenances Page 4 of 8
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2.3 GASKETS AND HARDWARE
A.
All gaskets shall be Viton. Joint hardware, where required, shall be Type 316
stainless steel.
2.4 FITTINGS
A.
Fittings shall be manufactured from polyethylene compound having cell
classification equal to or exceeding compound used in pipe to ensure
compatibility of polyethylene resins.
Specification 15210 - High Density Polyethylene (HDPE) Pipe, Fittings, And Appurtenances Page 3 of 8
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B.
Pipe and fittings shall be produced by the same manufacturer and from identical
materials meeting the requirements of this Section. Special or custom fittings
may be exempt from this requirement.
Pipe and fittings shall be pressure rated to meet the service pressure
requirements specified. Fittings shall be fully pressure rated to at least the same
service pressure rating as the joining pipe.
Specification 15210 - High Density Polyethylene (HDPE) Pipe, Fittings, And Appurtenances
Page 2 of 8
January 2021 3066.21
Property Unit Test Value
Procedure
Material Designation - PPI/ASTM PE 3408
Material Classification - ASTM D1248 IC 5 P34
Cell Classification - ASTM D3350 345464C
Density g/cm3 ASTM D1505 >0.940
Melt Index g/10 min ASTM D1238 <0.15
Flexural Modulus psi ASTM D790 110,000 to <160,000
Tensile Strength at yield psi ASTM D638 3,000 to <3,500
SECTION 15210
HIGH-DENSITY POLYETHYLENE (HDPE) PIPE, FITTINGS, AND APPURTENANCES
PART 1 - GENERAL
1.1 SCOPE OF WORK
A. Furnish and install HDPE pipe and fittings for the landfill gas collection and
control system (GCCS), condensate main, and the compressed air supply.
B. Pressure test solid HDPE pipe.
1.2 DELIVERY, STORAGE, AND HANDLING
CONTENTS
DIVISION 15 - MECHANICAL
Section 15210 - High-Density Polyethylene Pipe (HDPE), Fittings, and Appurtenances
Section 15212 - Polyvinyl Chloride (PVC) Pipe and Fittings
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Specification 02560 - Landfill Gas Extraction Wells Page 4 of 4
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D. The Bentonite Seal will be formed by evenly distributing bentonite around the
annulus of the well until a minimum plug thickness of 1 foot has been achieved.
3.3 DISPOSAL
A. Waste from well drilling operations shall be hauled to the active face of the
landfill operation the same day it is excavated.
[END OF SECTION 02560]
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Specification 02560 - Landfill Gas Extraction Wells Page 3 of 4
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B.
Wells shall be drilled to the minimum diameter and the specific depths shown on
the Drawings. CONTRACTOR shall drill the wells using bucket-type augers and
dry drilling equipment; wet rotary drilling equipment may not be used.
Specification 02560 - Landfill Gas Extraction Wells
January 2021
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Aggregate shall be washed, and uniformly blended according to the particle
size distribution requirements shown below.
Sieve Size Percent Passing by Weight
2-inch 100
1%-inch 90 - 100
1-inch 30 - 40
%4-inch 10-15
¥Y-inch 0-5
¥s-inch 0-5
2.2 BENTONITE SEAL
A. Bentonite seals shall be installed where shown on the Drawings using a hydrated
bentonite slurry mix poured into place.
2.3 SAND/GRAVEL FILTER
