Environmental
Consultants & Contractors
February 4, 2021
EXHIBIT D
Kerry Converse
Environmental Engineer
City of Nashua Solid Waste Department
840 West Hollis Street
Nashua, NH 03062
(603) 589-3420
Subject: Landfill Gas Collection System Expansion
Four Hills Landfill Concrete Block Wall Corrective Action, Nashua, New Hampshire
Dear Mr. Converse,
STR AahDORHERDNaOSIOMTES, MS
NOTES:
HDPE PIPE FOR GAS COLLECTION SHALL BE SDR 17. FITTINGS MAYBE SDR 17 OR SDR 11
n
COMPRESSED AIR PIPE SHALL BE SDR 9 HDPE.
CONDENSATE MAINS SHALL BE SDR 11 HDPE.
Py
NOTE:
4. PROVIDE SLACK IN GEOMEMBRANE BOOTS TO ALLOWFOR FUTURE SETTLEMENT
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4. SOLID HDPE PIPE SHALL BE BUTT-FUSION WELDED UNLESS OTHERWISE INDICATED. 3
BENTONITE SEAL
5. ON LANDFILL SIDESLOPES, PROVIDE MINIMUM 2 FEET OF COVER OVER SOLID HDPE PIPE AND.
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oan annmont
FERNCO CAP
(WELLHEAD LOCATED ELSEWHERE)
EASY LEVEL
FILTER/REGULATOR INDICATOR
AND CYCLE COUNTER
QED 8" WELL CAP
> (MODEL GWC8283)
AR FLUID
= —
SUPPLY
DISCHARGE
h \ _— 8° SCH BO PVC WELL CASING
rs LEVEL,
LIQUID PROBE.
| SET AT MID WELL DEPTH
S
WASTE
C
AIR, EXHAUST
& DISCHARGE
FITTINGS
I L+t}-— AP4'B BOTTOM LOADING AUTOPUMP (LONG)
ll BY QED ENVIRONMENTAL OR EQUIVALENT,
I APPROVED BY OWNER
90th aahmOnERDNaDSOTES
3
8
EXISTING —_, |
CONCRETE
BLOCK WALL
(HEIGHT
VARIES)
NOTES:
NOTE:
4. REFER TO SHEET 1 FOR ADDITIONAL NOTES AND LEGEND. START OF EXISTING (©
CONCRETE BLOCK WALL
a —_ = :
_
LEGEND (PROPOSED): a
2 LANDFILL GAS (LFG) CONVEYANCE PIPE SS ~
= (SIZE AND SLOPE DIRECTION) <<) s es A ~ ~
3 Ef LAYER
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3
2
2
9 2001 SANDOR, HEAD & ASSDINTES. MB
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i
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TO LANDFILL GAS LPs
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IT
£
PREPARED FOR:
CONCRETE BLOCK WALL CORRECTIVE ACTION
FOUR HILLS LANDFILL
NASHUA, NEW HAMPSHIRE
DES-SW-SP-95-002
JANUARY 2021
EXHIBIT C
SHEET INDEX
SHEET 1 EXISTING CONDITIONS PLAN
SHEET 2 PROPOSED WEST WALL CORRECTIVE ACTION PLAN
SHEET 3 PROPOSED EAST WALL CORRECTIVE ACTION PLAN
SHEETS 4-6 DETAILS
FROM: USGS TOPOGRAPHIC MAP- NASHUA, NEWHAMPSHIRE (2003)
LOCUS PLAN
SCALE: 1"=1000'
CITY OF NASHUA
FOUR HILLS LANDFILL
NASHUA, NEW HAMPSHIRE
PREPARED BY:
Specification 15212 - Polyvinyl Chloride (PVC) Pipe And Fittings Page 3 of 3
January 2021 3066.21
J. After solvent welding, the pipe shall remain undisturbed until cement has
reached initial set. As a guideline for joint setting time, use 1 hour for ambient
temperatures between 60 and 100°F, or 2 hours when ambient temperature is
between 40 and 60°F.
K. Pipe and pipe fittings shall be selected so that there will be as small a deviation
Specification 15212 - Polyvinyl Chloride (PVC) Pipe And Fittings Page 2 of 3
January 2021 3066.21
PART 3 - EXECUTION
3.1 PVC PIPE HANDLING
A. PVC pipe and pipe fittings shall be handled carefully in loading and unloading.
They shall be lifted by hoists and lowered on skidways in such a manner as to
avoid shock. Derricks, ropes, or other suitable equipment shall be used for
lowering the pipe into well borings. Pipe and pipe fittings shall not be dropped
or dumped.
3.2 PVC PIPE INSTALLATION
