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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

as possible at the joints, and so that inverts present a smooth surface. Pipe and
fittings that do not fit together to form a tight fitting shall be rejected.

[END OF SECTION 15212]

P:\3000s\3066.21\Source Files\Tech Specs\Division 15 Specifications\Section 15212 PVC.doc

SANBORN HEAD

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:

SANBORN HEAD

20 FOUNDRY STREET, CONCORD, NEW HAMPSHIRE 03301
(603) 229-1900 FAX (603) 229-1919

PROJ.#: 3066.21 "CONCRETE BLOCK WALL CORRECTIVE ACTION, FOUR HILLS LANDFILL, NASHUA, NEWHAMPSHIRE" DATED JANUARY 2021

Board of Aldermen — 9/26/17 Page 19

tour of the said campus. Also, my condolences to the Price family. Dorothea Price passed away. They had
viewing hours this evening, and the funeral mass will be held tomorrow up in Manchester followed by a funeral
down here in Nashua.

Alderman Deane

| just wanted to inform the Board that | am resigning from the Board of Aldermen effective the 29 of September.
| am embarking on a wonderful new chapter in my life, and | will no longer be living in Nashua. | live here now,
however. For those who have been spent the time stalking me, | live in Nashua.

| have appreciated working with all of you and all of my previous Hogwarts, | mean colleagues, from back from
2002 until today. | spent four years on the Board of Public Works. | enjoyed that immensely. | still enjoy
public works. | think it’s what makes our city tick. It has been a pleasure and honor to serve the taxpayers of
Nashua. As | leave the city my hope is that | have made a small impact on the lives of residents. | have seen
many changes in Nashua over the years and enjoyed the 40 plus years | have lived here. | wish the citizens
the very best and the city a prosperous future. | wish the Mayor well.

| really have to comment on the fact, | have seen politics in this city deteriorate to a level that makes you
wonder why people want to do this. It really does. It is kind of sad in a way. We can all have our difference,
but when it becomes personal that’s like over the top. Bult, I’ve enjoyed it.

l’ve enjoyed working with everyone. We've done a lot of different things. | have served with, | think me and
Brian are the last two longest serving aldermen here, so you are still on top of the heap, Brian. | just want to
thank everyone. Thank you, Mr. President.

Alderman Wilshire

Wow, Alderman Deane. | can say you’re tenure on this Board has not been a small impact at all. It has made
a significant impact, so thank you for that. Whatever your new adventures are, | wish you very well.

| also want to give a shout out to the Nashua Police Department for their Cops for Kids donation to a young
man here in Nashua that had cancer. They presented him and his family with a $5,000 check the other day,
which | think is pretty awesome. Thanks to the Nashua Police Department and their Cops for Kids with Cancer
efforts.

Alderman Clemons

Alderman Deane, | just wanted to say | wish you well in your future endeavors. Even though you and | have
had our differences, we also have had our agreements. It’s been a pleasure to serve with you these past
years. l’ve learned a lot from you. | was hoping we could ride this out together until January, but you will be
missed. The city will miss you. Thank you for all your contributions that you have given this city because they
mean a lot.

Alderman Siegel

| think | speak for everyone else too that | would like to thank my colleague, Alderman Deane. It’s been a real
educational experience and a pleasure working with you and an honor. | think the city is much better for your
presence here on the Board. Your presence will be sorely missed. | wish you good luck. | know going
forward, you will have nothing but good things.

Alderman Caron

So Alderman Deane, aren’t you glad | got you to join the Board of Public Works?

Z
é
i
5
zg

=o
TO LANDFILL GAS LPs

O ENERGY n=
IT
£

= —_ SSS VALVE CLOSE! \
y a HO1G—— yp HOT
io 20 Fe a 4
= 5
7 ie ee = a Saga —
[ ro = bo ee
%,
ay 24
1 hye 3 = otf ae
_ aan t—-—-$--3--Lo . : a=
= S ‘ % vo08
\ 5 \ Kors 004 y Ho:
il) nn) ACCESS ROAD t oie. a Fo AS
| a0 Sod % ioe HOE
1] hoos & ‘vo02 ! pio ae voor
— = 6
I! i ear = gE a
| \ ont ae Hoss 0h orgs
| 81] \ go = ont —— ae
| i £ 260 MBS HO 0, - = ab = V1 7(DVY).
4 peddle LU {fg Hot oe gods:
PO * = ==) Le
| % we re HOSE os gas 4,
YOST RD) S28 = -
I 040, 01 — =2_ >
| g oS
I APPROXIMATE COMMAS
| LIMITS OF <i sy Es
I ASBESTOS
i Ho08 bot DISPOSAL
— HO
vn
&
HORN
Ho29! Kc VOosRiDW he, i
SITY TAN osiiars Hogg
a 042)

a

7 = > WEST BERM ROAD ~
= — oh
[7 =

LEGEND.
240 10-FOOT CONTOUR
2.FOOT CONTOUR
------- 500-FOOT RESIDENCE SETBACK
meme ANCHOR TRENCH
22 —_LANDFILL GAS CONVEYANCE PIPE
Hos2 LANDFILL GAS COLLECTION TRENCH
SSS S——= PERFORATED PIPE)
032
= LANDFILL GAS SURFACE COLLECTOR
42

ROAD CROSSING PIPE SLEEVE

APPROXIMATE AREA OF ASBESTOS
CONTAMINATED MATERIAL

RIP RAP

APPROXIMATE AREA OF EXISTING
SURFACE COLLECTION LAYER

VAR
LANDFILL GAS EXTRACTION WELL

Vo21(DW) LANDFILL GAS EXTRACTION WELL
WITH DEWATERING PUMP (DW)
Pros

REMOTE LFG EXTRACTION WELL
(WELLHEAD LOCATED ELSEWHERE)

@ WELLHEAD
> VALVE
° VERTICAL RISER
—— Fil —— _ 8° DEWATERING CONDENSATE MAIN

2"@ COMPRESSED AIR LINE

————— ——12'8— Sh =————
HO ee gk

aoe.

8° HEADER
DECOMMISSIONEL
YANUARY 2015,

NOTES:

4. EXISTING TOPOGRAPHY AND SITE FEATURES ARE BASED ON GROUND FIELD SURVEY
PERFORMED BY WSP USA INC. (WSP) OF MERRIMACK, NEWHAMPSHIRE ON JULY 28,
AUGUST 5, AND AUGUST 10,2020.

HORIZONTAL DATUM NAD83 (2001)
HORIZONTAL PROJECTION: NH STATE PLANE
VERTICAL DATUM: VD 26

2. THE EXISTING LANDFILL GAS EXTRACTION SYSTEM INFRASTRUCTURE SHOWN IS
BASED ON:

A. AS-BUILT SURVEY INFORMATION PREPARED BY OTHERS; AND

B. FIELD MODIFICATIONS TO THE LFG SYSTEM COMMUNICATED TO SANBORN HEAD
BY THE CITY OF NASHUA,

3. THE $00 FOOT RESIDENCE SETBACK LINE SHOWN HEREON WAS TAKEN FROM A PLAN
ENTITLED "FOUR HILLS LANDFILL, CITY OF NASHUA, NEWHAMPSHIRE, OVERALL SITE
PLAN" PREPARED BY CMA ENGINEERS, DATED OCTOBER 2008.

4. ACTUAL LOCATIONS OF INDIVIDIUAL FEATURES MAY BE DIFFERENT THAN SHOWN.

5. _ LIMITS OF ASBESTOS DISPOSAL WERE PROVIDED BY THE CITY OF NASHUA AND
SHOULD BE CONSIDERED APPROXIMATE.

“x
OTO774

\

ae “ ij IN, »

Mos>

ord

Ce / SOK, So N
S ys ee
Yo UZPHASE Iho
4 STAGE II
Bi / g y

PHASE III

SANBORN |

GRAPHICAL SCALE

HEAD) =

420

CONCRETE BLOCK WALL CORRECTIVE ACTION PROJECT NUMBER:
DRAWN BY: O. HERNANDEZ CITY OF NASHUA
DESIGNED BY: O. HERNANDEZ FOUR HILLS LANDFILL 3066.21
D BY: E. STEINHAUSER NASHUA, NEW HAMPSHIRE
PROJECTMGR: R. CLAY SHEET NUMBER:
Pic) E, STEINHAUSER EXISTING CONDITIONS PLAN 1OF6
DATE: JANUARY 2021
TO. OnE DESORPTION m7

3
2
2

9 2001 SANDOR, HEAD & ASSDINTES. MB

Or a> - t 4%, '
Zi a a LI
gy 4 =|
f s | O51
we)
. “8 AN a
MJ APPROXIMATE LIMITS 0? ™ x Sa ho,
OF ASBESTOS DISPOSAL wo he N oo { ~~
- y Rus SoS
BRS a PHASE | e shoes | Pe) “Ra foe>
@ = és 82
TSN, S be
N ee Nae WY & oh PHASE Ie PHASE il
‘ 07 oe
cL 42 SOY OOo s ~ » ll
~~4.-- £8 4
Or LHS 7, peso 625. 4 “Ss 2 STAG E
of is ~ OY ° 6"S 22 LEGEND (PROPOSED):
‘ \ Ses Broren rN (REMOTE \ 5 8's. — 6" LANDFILL GAS (LFG} CONVEYANCE PIPE
\ Ew {SAS 9 & L A. O53 A / ee o 5 5 ee 9g AGL = =— (SIZE AND ote GIRESTION)
VV Bs: x " — : mi _ N. N » ~ —— AIR —— 2" COMPRESSED AIRLINE
Oe = = f |.
8 TS VERTICAL LF 6 == rex TURED DPS Ne? ; eo) 3"@ DEWATERING CONDENSATE MAIN
OY iS FO TRACTION oP = in GEOMEMBRANE . — ®
f a 2 & ee é REMOTE WELLHEAD
_ Kee <o Is e - a
CONDENSATE TRAPS > 4 t— vost
NEW, ° vo29 Go Ne yos0f. 031 vo32 vo33 aBeus 034 036 On Seatac
~ ® CONDENSATE TRAP
—-
_ Scere 8 e Te t - ——— 40-mil THICK TEXTURED
“7 6 S — (1? 2.60 SO. HDPE GEOMEMBRANE
atlas OF — —aeeciien
c eye f ee sera
DRAINTUBE™ NY COLLECTION LAYER
500-FOOT RESIDENCE RELOCATE EXISTING WELLHEAD CRATE” aN
SETBACK = "DTO7TA" UPSLOPE coecrion Ca J 1
\ NL LAER SS]
ror) ! |
\ vt : I NOTES:
GRAPHICAL SCALE PLAN |. REFER TO SHEET 1 FOR ADDITIONAL NOTES AND

ELEVATION

2. THIS PLAN ILLUSTRATES THE PROPOSED
MODIFICATIONS TO THE LANDFILL GAS SYSTEM. ACTUAL
LOCATION OF WELLS, PIPE, AND VALVES MAY CHANGE
DEPENDING ON SITE CONDITIONS AND CONSTRAINTS
ENCOUNTERED DURING CONSTRUCTION.

3. CONTRACTOR SHALL PLAN TO TEMPORARILY SHUT OFF
GAS FLOW USING EXISTING CONTROL VALVES WHEN
MAKING CONNECTIONS TO EXISTING LFG PIPES, AND
SHALL NOTIFY CITY REPRESENTATIVES AS TO WHEN
SECTIONS OF THE EXISTING GAS SYSTEM WILL BE
TEMPORARILY SHUT OFF.

4. CONTRACTOR SHALL PLAN TO TEMPORARILY SHUT OFF
THE COMPRESSED AIR LINE USING EXISTING SHUT-OFF
VALVES AND RELEASE COMPRESSED AIR PRIOR TO
MAKING CONNECTIONS TO EXISTING COMPRESSED AIR
LINES.

2400

VERTICAL SCALE

oO 40
HORIZONTAL SCALE

8. CONTRACTOR SHALL PLAN TO TEMPORARILY SHUT OFF
UPGRADIENT DEWATERING PUMPS WHEN MAKING.
CONNECTIONS TO CONDENSATE MAINS.

SOLID LANDFILL GAS CONVEYANCE PIPE SHALL BE
INSTALLED AT A MINIMUM SLOPE OF § PERCENT.

ELEVATION

=o
COMPACTED SOIL FOUNDATION UNDER WALL
(ABOVE LINER SAND)

4450

STATION
EXISTING CONCRETE BLOCK WALL PROFILE

(FOR INFORMATION ONLY)

= EXISTING CONCRETE BLOCK WALL

SANBORN

SCALE: AS NOTED

|| wea

eT DRAWNEY R.CLAY CONCRETE BLOCK WALL CORRECTIVE ACTION | provect NuNeER
DESIGNED BY: R. CLAY cl OF NASHUA
: FOUR HILLS LANDFILL 3066.21
D BY: E. STEINHAUSER NASHUA, NEW HAMPSHIRE
eae ee eTEWHAUSER PROPOSED WEST WALL SHEET NUMER
DATE: JANUARY 2021 CORRECTIVE ACTION PLAN 2 OF 6

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
< -

—— AIR —— 2"@ COMPRESSED AIR LINE ~S~ I ~ ~ ~
3"@ DEWATERING CONDENSATE MAIN ROTOR KELL (.2\ ee
@ REMOTE WELLHEAD SK S ~ ~
031 VERTICAL LFG EXTRACTION WELL
WITH DEWATERING PUMP 40 miTHICK
TEXTURED HDPE
40-mil THICK TEXTURED HDPE GEOMEMBRANE GEOMEMBRANE OY
: ~: ae ao
ou i 7 NG
DRAINTUBE™ SURFACE COLLECTION LAYER Vy SSIS , I
w x fe ye e 30} — I
Ys he >
a“ Li, po = sof aa — ey a !
7Oo™
7 Os f J 2
na
ite
st fQ2) I
A .
wR ry Ce
Oe ry CONDENSATE
ae) TRAP We
PHASE Il PTA
FD crue seve een
I WELLHEAD AND TRAP. SLEEVE
TO BE PROVIDED BY CITY

STAGE Il =
A

!
il
er <= REMOTE WELLHEAD {2 ay PHASE il
RS FP in
fy =. CONNECT TO AIRFM (5X
AT EXISTING WELL on Z
BS. Leg / ek Hos0% PAM

ee

40 20! 40! 80"
369 ator posts moat atts posts ------ — 360
i i i i i i i i
wo Po bo bo Po bo bo | 540
Tr 1 T rT 1 T Tr 1
. | | | | FUTURE FINAL GRADE | | |
i sip 4{------ 4------ [__ (FORREFERENCE) Vp 300
i i i i
a 300 , a . ee +o TOP OF CONCRETE BLOCKWALL 300
nh EXISTING GRADE (AUGUST 2020)
i Zl x ee eee | 580 Z
6 1 §
e e
| 200 | — — eter Of EL J) x60
> | >
lu | lw
Da) 280 See 240
BOTTOM OF EXISTING |
I I | CONCRETE BLOCK WALL I
CTT TTT qT TtTT TTT Cott 7 220
COMPACTED SOIL FOUNDATION UNDER WALL I I
(ABOVE LINER SAND) Le J p00
i i AS-BUILT PRIMARY LINER SAND GRADE
4e9 aoe 4o- Lo joe 4-H Li 480
o+s0 100 1480 200 2680 3+00 3450

VERTICAL SCALE STATION = EXISTING CONCRETE BLOCK WALL
40 oo! 40" 80"

« EXISTING CONCRETE BLOCK WALL PROFILE

(FOR INFORMATION ONLY)

o 40!
HORIZONTAL SCALE

DRAWN BY: R. CLAY

CONCRETE BLOCK WALL CORRECTIVE ACTION PROJECT NUMBER:
CITY OF NASHUA

DESIGNED BY: R. CLAY FOUR HILLS LANDFILL 3066.21
D BY: E. STEINHAUSER NASHUA, NEW HAMPSHIRE

(fa PROJECTMGR: R. CLAY PROPOSED EAST WALL SHEET NUMBER:

Pic: E. STEINHAUSER

DATE: JANUARY 2021 CORRECTIVE ACTION PLAN 3 OF 6

SANBORN ll HEAD] usw

: ei
Ea HOWL et
“Hei nntte TOL One DESORPTION EW

90th aahmOnERDNaDSOTES

3
8

EXISTING —_, |

CONCRETE
BLOCK WALL
(HEIGHT
VARIES)

NOTES:

Sl 1. EACH VERTICAL LFG EXTRACTION WELL IS TO BE EQUIPPED
él WITH A DEWATERING PUMP. SEE DETAIL 1 ON SHEETS.
il
| 2. EXISTING WELLS WITHIN THE AREA OF GEOMEMBRANE COMPRESSED AIR & DEWATERING SUPPLY
Z| DEPLOYMENT SHALL BE BOOTED. (SEE DETAIL 1 ON SHEET §}
a FERNCO CAP
a 69 PVC PPE
3 6" HDPE PIPE
il Wet CAP 6" PVC FLANGE
&| (SEE DETAIL 1 ON SHEET §) SOAPTER
ty
8 8x6" 6" HDPE
— al EXISTING SMOOTH B88 "6" PVE naNoe
60-MIL HOPE REDUCING TEE TANCE

GEOMEMBRANE

C3
masTING PIPE BOOT

GEOTEXTILES

INSTALL ONE ROLL WIDTH

TRANSITION PIPE
TO BELOW GRADE

Qgp TOREMOTE
reLLHEAD

EL ANCHOR TRENCH

WELL CAP
(SEE DETAIL 1 ON SHEET 5}

40-mil THICK TEXTURED

B'xB'x6" PVE HDPE GEOMEMBRANE 45° MIN.
exISTING REDUCING TEE
(TO REMOTE
WELLHEAD) ©
INTERMEDIATE -—
COVER t

BENTONITE SEAL

SAND/GRAVEL FILTER

40-mil THICK TEXTURED (2FTK2FT -
EXTRUSION WELD GEOMEMBRANE ' |
8°@ SCHEDULE 89 ——]
CUT OUTER GEOTEXTILE SOLID PVC PPE 2
TO ALLOW FOR WELD AND
LEAVE WELD VISIBLE
— 8'9 SCHEDULE80
(Py PIPE JOINT
LFG EXTRACTION WELL Ney ° STONE AGGREGATE
a . a
8°@ SCHEDULE 80
\5_J PERFORATED PVC PPE | WELL DEPTH VARIES
° (SEE WELL SCHEDULE}
. mn
an WASTE
mS _
8°@ PVC END CAP
CRUSHED STONE
6" PERFORATED
HDPE PIPE
— 2.5! MIN ——-|
Cre 5 LFG EXTRACTION WELL CONSTRUCTION
NOT TO SCALE
PRIMARY
GEOMEMBRANE
WELL SCHEDULE
BOTTOM OF TOP OF TOTAL WELL | BOTTOMOF | TOP OF WELL SCREEN | TOP OF CASING
pest tion | NORTHING EASTING WASTE EXISTING DEPTH WELL SCREEN SCREEN LENGTH ELEV.
(FT) WASTE (FT) FT) (FT) (FT) (FT) FT}
v029 822169 10285828 2186 2768 508 226.1 2718 455 281.1
‘vos0 821240 10236198 2319 282.4 427 2394 2774 377 2866
vos 820317 10286584 2247 2838 514 2322, 2788 464 288.1
vos2 19307 10286074 234.5 282.9 409 242.0 2778 35.8 2874
033 818473 10287386 236.5 2863 423 244.0 2813 373 2908
vos4 817549 10237744 2347 2838 nS 2422 2788 365 288.1
GEOMEMBRANE Voss 816632, 1023813.8 232.8 2748 347 230.8 260.5 207 279.0
GEOSYNTHETIC CLAY LINER Voss 818705 10288518 2303 2617 23.9 2378 286.7 189 266.2
INAGE
GEOCOMP OSE 037 818456 10244405 2384 2717 25.8 245.9 266.7 208 276.2
WELL SCHEDULE NOTES:
SECTION VIEW 1. TOP OF EXISTING WASTE ELEVATIONS PRESENTED IN THE WELL SCHEDULE SHALL BE RE-SURVEYED BY CONTRACTOR AND ELEVATIONS SHALL BE PROVIDED TO ENGINEER PRIOR 70 DRILLING.
2. LFG EXTRACTION WELLS SHALL BE INSTALLED WITHIN ONE FOOT OF THE LOCATIONS LISTED IN WELL SCHEDULE.
© NOT TO SCALE
DRAWN BY: R. CLAY CONCRETE BLOCK WALL CORRECTIVE ACTION PROJECT NUMBER
DESIGNED BY: R. CLAY CITY OF NASHUA
© eTINHAUSER FOUR HILLS LANDFILL 3066.21
Dey: E.
SANBORN HEAD Senasneres —
PROJECTMGR: R. CLAY SHEET NUMBER
Pic: E. STEINHAUSER DETAILS 40F6
DATE: JANUARY 2021
TO. DATE DESCRIPTION Ea

es

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

|
l| | B'@SCH QD
| I teu sone NEA

FLUID INLET
i et

3' MIN. | ll
+.

BOTTOM OF WELL

DEWATERING PUMP INSTALLATION

({LFG EXTRACTION WELL)

NOT TO SCALE

NOTES:

4. HDPE PIPE FOR GAS COLLECTION SHALL BE SDR 17. FITTINGS MAYBE SDR 17 OR SDR 11

2. SOLID HDPE PIPE SHALL BE BUTT-FUSION WELDED UNLESS OTHERWISE INDICATED.

EXISTING
WELLHEAD

2" QED PRECISION QUICK-CHANGE™
ORIFICE PLATE WELLHEAD
OR EQUIVALENT APPROVED BY ENGINEER

2"@ KANAFLEX OR SOLARGUARD™
FLEXIBLE HOSE WITH CLAMPS
(OR EQUIVALENT APPROVED BY
THE ENGINEER)

NOTE:

WELLHEAD
Sf Assen

HDPE
RISER
PPE

HDPE TEE
WELD (TYP}

t
GAS FLOW
HDPERISER PIPE

(SIZES VARY; 4'9 OR6'D)

*
GAS FLOW

SINGLE REMOTE WELLHEAD
CONNECTION AT EXISTING WELLHEAD

1. WELLHEAD SHALL BE COMPATIBLE WITH
THE CES/LANDTEC GEM-2000™ AND
GEM-S000"™ LANDFILL GAS MONITORS.

FERNCO FLEXIBLE COUPLING

4"@ x 2"@ HDPE REDUCER

SIZES AND
TYPES VARY
4" HDPE PIPE
4.5! MIN.

6" x 4"@ HDPE REDUCER

6" HDPE PIPE

EXISTING GRADE
x

GAS FLOW

GAS FLOWTO.
BLOWER/FLARE
STATION

WELLHEAD ASSEMBLY

—

@

NOT TO SCALE

8'2 SCH 80
PVC PIPE
5/8" HOLES

NOTES:
4. PERFORATIONS SPACED 80° APARTHORIZONTALLY.
2. PERFORATIONS SPACED 4" APART VERTICALLY.

3. 80° AND 270° ROWS STAGGERED 2" BELOW" AND 180" ROWS.

PERFORATED PVC PIPE

2

NOT TO SCALE (LFG EXTRACTION WELLS)

NOTTO SCALE

EXISTING RISERS FOR n
COMPRESSEDAIR “al EXISTING LFG EXTRACTION WELL
SUPPLY AND WITH DEWATERING PUMP
DEWATERING (DEWATERING PUMP NOT SHOWN)
CONDENSATE MAIN
(TO REMAIN)
EXISTING GRADE
+ N % Xe [ 4
2" SDR 9 HDPE PIPE
(COMPRESSED AIR)
&
3°@ SDR 11 HDPE PIPE our mists
(CONDENSATE MAIN) ANee EES

CONNECTION TO EXISTING AIR SUPPLY
AND CONDENSATE MAIN AT EXISTING
DEWATERED LFG EXTRACTION WELL

NOT TO SCALE

ELASTOMERIC

r END CAP (TYP}

6" HDPE PIPE (TYP} —=

[ EXISTING GRADE

| -— AQUABLOK 2080FW

2! MIN. HYDRATED BENTONITE SEAL
OR EQUIVALENT APPROVED
BY ENGINEER

|,-— ROSS

I— 10 oz/yd? NON-WOVEN
GEOTEXTILE

DOT

}-—— 90° ELBOW (OPEN)

4! MIN. |-— STONE AGGREGATE

L 90° ELBOWS: JS
ELEVATION VIEW
CONDENSATE TRAP

NOTTO SCALE {AT LOW POINTS)

SCALE AS NOTED

SANBORN HEAD

DRAWN BY:
DESIGNED BY:

R. CLAY
R. CLAY

E. STEINHAUSER

D BY:

PROJECTMGR: R. CLAY

Pic: E. STEINHAUSER

Mr

45 Nona ©
a eA

A Apa ts

DATE: JANUARY 2021

iy =O

DESCRIPTION ey

CONCRETE BLOCK WALL CORRECTIVE ACTION PROJECT NUMBER
CITY OF NASHUA
FOUR HILLS LANDFILL 3066.21
NASHUA, NEW HAMPSHIRE
SHEET NUMBER:
DETAILS 5 OF6

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

pO

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.

STABILIZE AGAINST EROSION.
6. EXCESS EXCAVATED WASTE SHALL BE HAULED TO ACTIVE FACE OF THE LANDFILL FOR i

DISPOSAL.

4° MIN,
METALLIC t

WARNING TAPE

EXISTING GRADE 6 MIL. THICK PEWRAP

2"@ SDR 9 HDPE ~

COMPRESSED AIR PIPE

excavarto’)

(MATERIAL
a

2" SDR 9 HDPE PIPE
(COMPRESSED AIR)

3'@ SDR 11 HDPE PIPE
(CONDENSATE MAIN)

I—— 6" SDR 17 HDPE PIPE

6" MIN

3! MIN. ——™|

f~— 2! MIN.

FITTINGS:

NOT TO SCALE

COMBINED PIPE TRENCH

NOT TO SCALE

EXISTING
CONCRETE
BLOCK WALL
(HEIGHT
VARIES)

EXISTING SMOOTH
60-MIL HDPE
GEOMEMBRANE

x
GEOTEXTILES
INSTALL DRAINTUBE™ ROLL ON
GROUND AT EXISTING GRADE
(DRAINTUBE MODEL 600CWLFG2 D25)

BACKFILL WITH
COVER MATERIAL
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————

NOT TO SCALE NOT TO SCALE
NOTTO SCALE
CONCRETE BLOCK WALL CORRECTIVE ACTION PROJECT NUMBER
DRAWN BY: R. CLAY
DESIGNED BY: R. CLAY CITY OF NASHUA
. FOUR HILLS LANDFILL 3066.21
S N B O R N H E D SCALE AS NOTED D BY: E. STEINHAUSER NASHUA, NEW HAMPSHIRE
f \ f \ PROJECTMGR: R. CLAY SHEET NUMBER:
Pic: E. STEINHAUSER DETAILS 6OFG
DATE: JANUARY 2021

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

conversek@nashuanh.gov

Subject: Landfill Gas Collection System Expansion
Four Hills Landfill Concrete Block Wall Corrective Action, Nashua, New Hampshire

Dear Mr. Converse,

In response to your request for pricing SCS Field Services has prepared this proposal to perform the
requested construction Concrete Block Wali Corrective Action at the Four Hills Landfill in Nashua,
New Hampshire.

SCOPE OF SERVICES

Our scope of services is based on the bid documents dated January 2021, our correspondence, and
the attached assumptions.

ASSUMPTIONS AND PROJECT FEES

The required fee schedule is attached, as well as our attached Assumptions and Conditions for the
above referenced project.

GENERAL CONDITIONS

We look forward to discussing any questions or comments you may have concerning this estimate.
Please do not hesitate to call either Guy Lewis at (703) 517-5594 or Stephen Smith at (574) 643-
4324 with any questions or comments.

Sincerely,

Guy F. Lewis Stephen E. Smith
Vice President/Regional Manager Senior Estimator
SCS Field Services SCS Field Services

11260 Roger Bacon Drive, Suite 300, Reston, VA 20190 {| 703-471-6150 | Fax 703-709-837 Bed