...

0

I'• • a .. .. ,:'!

o'

.. '·~x·

• . ·. a .,.

·, 5, 1-l cer'(I

"\ =~ · - .. . ':

Prospeet~ Hill

- ·-:__::ii, l (....,,,=< l 51 J<>';,OP

REFERENCE: BASE MAP USGS 7.5 MIN. QUAD., TROY NORTH, NY, 1954, PHOTOREVISED 1980.

2000' 0

Approximate Scale: 1" = 2000'

09/10/04 SYR-085-DJH 36643014/36643n01 .cdr

AREA LOCATION

RELIANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY

PROPOSED REMEDIAL ACTION PLAN

SITE LOCATION MAP

BBL BLASlAND, BOUCK & LEE, INC. engineers, scientists, economists

FIGURE

1

~

FORMER FIRE TRAINING AREA

1. BASE MAP DEVELOPED FROM NIAGARA MOHA'M<, A NATIONAL GRID CCMPANY (NIAGARA MOHA'M<) AS-BUILT DRA'MNG EH111l.£D •sotoot.. STREET H'Y'ORO DEVELOPMENT: CANAL WALL REPLACEMENT GENERAL Pl.AN, LOCATIC>f MAP. ~ERM.. NOTES AND DWG. INDEX.• FlLE INDEX NO. 2.0-S12-H4, ORA'MNG NO. D-30884-E, ORIGINAL ISSUE DATE 8/JO/lil4, AS-BUILT lil/9.5, AT A SCALE Of 1•-200'.

2. BASE MAP ALSO DEVELOPED FROM SffE SURVEY COMPLETED BY NIAGARA WOHA'M< (AS PRESENlED ON 'THE NIAGARA MOHAWK ORAwtlG ornn.m •sCHOOL STREET DEVELOPMENT SAM PUNG LOCA llONS. INDEX NO. 2.0-S12-M5, DRAWING NO. B-33591-E. DATED APRIL 1999, LATEST

~=1s"'= =~~T ... ~11~~ to.;~m· ~~~~. 1~~Q(. LEE. INC. (BBL) OURtNG NOi/EMBER 1 lilff.

~~lOfT .. llEJ" J': P.4CCS£t,A't.T-&. 8/13/04 Sl'lll-'4-PQ. llc.8 »64l014/lft4.»0l.OWG

MOHAWK RIVER

---- , -Ui..

LOWER GATEHOUSE

~ '"?°' 8~

GRAPHIC SCALE

RELIANT ENERGY FORMER NIAGARA MOHA'M<, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

SITE PLAN

BBL: LA.SLNI:>__,_ IOUCX .. LR. INC

FIGURE

2 - --

lC: l6'4lXOJ.OW: L: ~-": OfT• N7 P': 'ACL!O/l"l.T-k l /13/o4 S'ltt- M-ltCB lte.A lt<:8 3N4.l014/»e4.ll02.0WC

1'o ~~

' ::e

. _\P.!."-; , '/ _,'-".-.. ; , ;r,;-~~~--:;;..'-/iCt

""""-

\

\

WlEllll:.

S-47 A Rl/FS SURFACE SOIL SAMPLING LOCATION (10/00 - 02/01)

S-48 8 Rl/FS SURFACE & SUBSURFACE SOIL SAMPLING LOCATION (10/00)

S-3 i;I PSA SURFACE & SUBSURFACE SOIL SAMPLING LOCATION (J/99 & 11/99)

S-27 A PSA SURFACE SOIL SAMPLING LOCATION (J/99 .. 11/99)

WW-3 ... MONITORING WELL LOCATION

SCH-TP2 Ell PHASE II ESA TEST PIT LOCATION (8/98)

SCH-SB4@ PHASE II ESA SOIL BORING LOCATION (8/9B)

SHORELINE

-- - -- TOP OF BANK

FENCE

--DHE-- 0'¥£RHEAD HIGH 'iOL TAGE El..EClRIC LINE

__ 170

___ GROUND SURFACE CONTOUR LINE (ELEVATION IN FEET ABO\£ MEAN SEA LE\£L)

~ 1. BASE MAP OE'.UOPED FROM SllE SUR\£¥ COMPl£1ED BY

NIAGARA MOHA'MC, A NATIONAL GRID CCUl'ANY (NIAGARA MOHA'MC) (AS PRESENTED ON lHE NMPC DRA'MNG ENTITlED •so-toot. STREET OE\IELOPWENT SAM PUNG LOCA TI OHS, INDEX NO. 2.0-S12-M5, ORA'MNG NO. 8-335511-£. OAT!O APRIL 1999, LATEST RE\1SION .. ~ 2001 , AT A SCALE CF 1·-so'). LOCATION OF ICE ~DER. TOP OF BANK, AND HIGH \IOLTAOE LINE ARE FROM SUR'IEY AC11"1TIES COMPLETED BY Bl.ASl.ANO, BOUCK .. I.EE, INC. (BBL) CURING NO\£M8ER 1999.

2. SOIL SAMPLING LOCATIONS S-1 THROUGH 5-14, S-M lliROUGH S-72, ANO MONITORING WEU. LOCATIONS MW-1 lliROUQi MW-3 'M:RE SUR'£YEO BY NIAGARA MOHAVf<. SOIL SAMPUNG LOCATIONS s-1s Tl-flOUGH S-51. AHO MONITORING WEU. ... ~ ... 'llERE SUR'.£YED BY BBl.. PHASE II ESA TEST PlT ANO SOL 80RWC LOCA llC»ilS ARE APPROXIMA lL

3. MONITORING WEll LOCATION MW-25 IS AN 0'¥£RBURDEN MONITORING WEll Mill£ MONITORING VIEl.l. MW-20 ts A BEOROO< WELL

4. IRM • INTERIM Ra.EDIAL MEASURE

o eo· 120' lo-! ;;;;I I

GRAPHC SCALE

RELIANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

PRE-IRM TOPOGRAPHY AND PREVIOUS SOIL SAMPLING

l

BBL FIGURE

~. IOUOC . l.El, INC ....,.._~

3

X:J8'14Jl(04.0'M: L: ON•'": Off• ACF P: PACESIE'T/PLT-81. l/ll,/O(Slft-~Jlall'Q.Jt<:e J66.4l014/:)el4J803.0WG

' T!-3

///

/;'

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/

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, /

so-~,4-2 /

/ 7·

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\ ~ PUWf' ----· ·T2- J """'""" _,_,'ti ___ _

S-42 S0.:-5------- -2 _..-8fa-1

\ ~

170 BEDROCK SURFACE ELEVATION CONTOUR LINE ---- IN FEET ABO\-£ WEAN SEA l.E\'U

(nUI BEDROCK SURF ACE El£VA TION IN FEET ABOVE MEAN SEA l.nn

S-47 /;,. Rl/FS SURFACE SOIL SAMPLING LOCATION (10/00 - 02/01)

S-48 9 ~~TI~(toJ=oo~ SUBSURFACE SOIL SAMPLING

SD-80

S-31ij

S-27A

MW-3 ...

T3-3 •

Rl/FS SURF ACE SEDIMENT AND SEDIMENT CORE SAMPLING LOCATION (10/00)

PSA SURF ACE &: SUBSURFACE SOIL SAMPLING LOCATION (3/99 .t 11/99)

PSA SURFACE SOIL SAMPLING LOCATION (3/"9 "' 11/99)

MONITORING ¥IEl1. LOCA llON

SEDIMENT PROBING LOCATION (11/99)

PSA SURFACE SEDIMENT AND SD-6 l!J SEDIMENT CORE SAMPLING LOCATION (11/99)

SCH- TP2 EE PHASE 11 ESA TEST P1T LOCATION (8/98)

SOi-SB+ ® PHASE 11 ESA SOIL BORING LOCATION (8/98)

---- SHORaJNE

TOP OF BANK

FENCE

--OH£-- OVERHEAD HIGH 'IOL..TAGE UEClRIC LINE

------------- SEDIMENT TRANSECT LINE

liQru;_ 1. BASE MAP DEVELOPED FROM SITE SUR'¥£Y COMPL£T'ED BY NA.CARA

WOHAWK. A NATIONAL GRID COMPANY (NIAGARA MOHA'M<) (AS PRESENTED ON THE NMPC DRAWING ENTin..EO •SOloa.. STREET DEVELOPMENT SAMPLING LOCATIONS. NOEX NO. 2.0-512-MS, ORAWNG NO. B-33591-E. DAlED APRL 1999, LATEST REV1SION MAROi 2001, AT A SCAL£ Of 1·-so'). LOCATION Of ICE FENDER, TOP Of BANK, ANO HIGH YOl.TAGE LINE ARE FROM SURVEY ACTIV1TIES COMPLETED BY BLASl..ANO, BOUCK I: L£E. INC. (881.) DURING NOVEMBER 1 ~9.

2. 5al SAMPLING LOCATIONS S-1 lHROUGH S-14, S-M TiflOUGH S-72, ANO WONITORING WELL LOCATIONS MW-1 niROUGH MW-3 WERE SURVEYED BY NIAGARA MCliAWK. Sill SAMPLING LOCATIONS S-15 niROUGH S-51, MONITOR1NG WEll.. MW-4, ANO EAOi OF THE SEDIMENT PROBING LOCA TlOHS 'M:RE SURl,£YED BY BBL PHASE II ESA TEST PIT ANO 5al BORING LOCATIONS ARE APPROXIMATE.

3. MONITORING WE1.L LOCATION MW-25 IS AN 0'¥£RBURDEH MONITORING '#fEll. ¥fill£ MONITORING WEU. MW-20 IS A BEDROCI< WELL

4. niE PRESENTED BEDROCK filVATIONS ARE RELATIVE TO A SITE-SPEClflC DAlUM.

o eo· 120'

"'"""' d I GRAPHIC SCALE

RELIANT ENERGY FORMER NIAGARA MOHA\\I<, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

BEDROCK SURFACE CONTOUR MAP

BBL: ~~~~

FIGURE

4 ---

~·

X: Jill 4.lXC)l.OWQ: L: ON-*'; OfT .. ll[F P: PACESET/PLT-k 9/13/04 S"lll -S4-RCI JICA Ital 3M~4/ll643COl.D90

.T>--J

<a ~~

\ S-47 A

S-48 8

so-so

S-3!;1

WiEtlD;.

Rl/rS SURFACE SOIL SAMPLING LOCATION (10/ 00 - 02/ 01)

Rl/rS SURFACE .t SUBSURFACE SOIL SAMPLING LOCATION (10/00)

RI/F'S SURFACE SEOIWENT ANO SEDIMENT CORE SAMPLING LOCATION (10/00}

PSA SURFAC.f 4c SUBSURFACE SOIL SAMPLING LOCATION (3/V9 .t 11/99}

S-27 JJ.. PSA SURFACE SCML SAMPLING LOCATION (3/99 .. 11/99}

MW-3 -+- MONITORING ¥1EU. LOCATION

T3-J • SEDIMENT PROelNG LOCATION (11/IXI)

PSA SURFACE SEDIMENT AND S0-6 !!J SEDIMENT CORE SAMPLING LOCATION (11/99)

SCH-TP2 8l PHASE U ESA lEST PIT LOCATION (8/VB)

SCH-SB<'@ PHASE 11 ESA SOIL BORING LOCATION (8/98)

---- SHORELINE

- ----- TOP~ BANK

~ .. ~ FENCE

~ --------------- SEDIMENT TRANSECT LINE

\ --OHE-- OVERHEAD HIQi VOLTAGE El.ECTRIC LINE

~ -TOTAL PCB CONCEN1RAT10N (ppm} ~SAMPl.£ DEP'Tli

15. D • CONCDilRA 110N IS BASED ON A OILUlED SAMPlE ANALYSIS..

7. J • ESTIMAlED CONCENTRATION.

=

8. < • EAQi AROQ.OR WAS NOT DElEClED AT A OONCENTRA T10N ABO'r'E 'THE REPORlED LA.BORA TORY DETECTION LMJT.

9. RI ANALYTlCAL RESULTS SHOWN IN BLACK DATA BOXES. PSA AHO PHASE II ANALYTICAL RESULTS SHO\llH IN GRAY DATA BOXES.

10. SHAOa> VALUES INDICATE THAT PCB• WERE OET[ClEO AT A CONCENTRA 110N 'MfK>I WAS EQUAL TO OR EXCEEDED THE NYSOEC-RECOMWENDED 5al a.£ANUP C&ECT1't'£5 PRESENlED IN THE NYSDEC TEOiNICAL AND ADMINISlRAll\IE WIOAHCE MEMORANDUM (TAGM) ENTill.£0 •OETERMINATl(Jll CF SOIL a.EANUP 08.ECTIVES AHO Q.EANUP LEVELS.• H'ttlR-94-4048, DAlm .JANUARY 24, 1994.

NQIES;_ 1. BASE MAP DEVELOPED FROM SITE SUR~ COMPL£Tm BY

NIAGARA MOHAYl1(. A NATIONAL GRID CC».FAN Y (NAGARA WOHAWK) (AS PRESENm> ON THE NIACMA MCtlA'M< DRAWING ENlllUD ·~oo.. STREET OE\'El.OPWENT SAM PUNG LOCATIONS, INDEX NO. 2.~S12-M~ ORAWlolG NO. B-33591-E. DATED APRIL 1909, LATEST RE"JISION MAROi 2001, AT A SCALE Of

~~~L~~ ~~=~·A~~SB~H~~ Bl.ASl.AHD, BOUCK • LEE, INC. (98L) DURING NO\DeER 1999.

2. SOIL SAMPLING LOCATIONS S-1 ~OUGH S- 14, S- M THROUGH S-72. ANO MONITORING WELL LOCATIONS MW-1 THROUGH MW-3 v.t:RE SUR'RtEO BY NIAGARA MOHA'M<. SOtL SAMPLING LOCATIONS S-1~ 'THROUGH S-~1 , MONITORING WEll MW- 4, ANO EA.Qi Of lHE SEDIMENT PROBING LOCATIONS WERE SURVE'!'m BY 98L PHASE JI ESA TEST PIT AtC:I SQL BORING LOCA llONS ARE APPROlCIMAlE.

3. WONTORtlG YIRL LOCATION MW- 25 IS AN ~ROEN WC>llTORINC WJ.. Mill£ MONTORIHG WEl.L MW-20 IS A BEDROCK Yl£U..

4, PCS• • POL 't'OILORINA TED BPtiEJrfYl.S.

5. ALL COHCEHlRATIOHS AAE REPORTED IN PARTS PER .. WON (PPM).

0 OD' 12o' b ;;;;;! I

GRAPHIC SCALE

REUANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPANY

SCHOOi. ST. HYDROELECTRIC STA llON - COHOES, NY PROPOSED REMEDIAL ACTION Pl.AN

PREVIOUS SOIL SAMPLING RE SUL TS FOR TOT AL PCBs (ppm)

BBL, kAS..AHJ IOLCl( • LU NC. • 119/r'l ee ro • u :le111/Hf

FlGURE

5

X: JM43JC01. l)WG 1: NONE l: QN,.~ Of'P"•ltU I": PAGC5£T/f'\.T-M. t/ll/04 S'!'R-$4-flQ!I 36Ml014~0WO

' \ \

\ \

\

' ' \ Af'f'ltO*IATI: \\

LUlS \ fl-=: \ """'-_,,_ \

' ' ' \ ' \

\ \

\ \

\ \

\

\ ' \ ' \ ' \ ' \ ' \

' \

'

1'o ~~

' "1'

~..-,:: ;:r.·:.·l'."..'-.'

CAHAL

~

\ \

so- 101 ~

RB-N .t.

llF-50

llF-1 .

'IS-I .

WlWl2;_

APPROXJMA TE SEDIMENT SAMPLING LOCATION

APPROXIMATE Rl'v£RBANK SOIL SAMPLING LOCATION

APPROXIMATE \IERIF1CAT10N SOIL SAMPLING LOCA 110N PRIOR TO REACHING FINAL EXCAVATION LIMITS

APPROXIMATE FINAL 'v£RIF1CA110N SOIL SAMPLING LOCATION AL.ONG EXCAVATION Fl.C>OR

APPROXlMA TE VERIF1CA TION SOfL SAMPLING LOCATION ALONG EXCAVA lle»i WALL

CJ CJ CJ

APPROXJMATE LIMITS ~ SURFACE SOIL REMOVAL (TO A DEPTH OF I F001'

APPROXIMATE UWITS OF SUBSURFACE SOIL REMOVAL (TO DEPlHS RANGING FROM 2 FEET TO 4 FEE1'

APPROXIMATE LIMITS OF SUBSURFACE Sotl REMOVAL (TO A OEPlH OF APPROXIMA Ta Y 5 FEE1'

rzzJ APPROXIMATE Ul"ITS OF SURF ACE ANO SUBSURFACE SOIL REMOVAL (TO lHE TOP OF BEDROCK)

MW-J + MONITORING v.ELL LOCATION

SHORELINE

------ TOP OF BANK

--.------ FENCE

--<K- - O~HEAO HIGH VOLTAGE ELECTRIC LINE

-------------- APPROXIMATE LOCATION OF 8-INCH DIAMETER HOPE REPLACEMENT PIPE

= 1. BASE MAP DE\£LOP[D raow SITE SUR~ COMPl.ElED BY NIAGARA MC»iA'M<, A NATIONAL GRID COWPANY (NIAGARA MOHA'M<) (AS PRESDITED ON THE NIAGARA MOHAWK ORA'ltt1HC Drnll.£D "sa-tool STREET OE\'£LOPMENT SAMPLING LOCATIONS. INDEX NO. 2.0-512-M~ DRAVl1NG NO. 8-~1-E. DATED APR1L 1999, LATEST RE'VISION MAAC>i 2001, AT A SCALE OF

~~~Jt~~ ~ci.,CEJ:~A~:SB=p~~ BLASLANO, BOUCK A LEE. INC. {BBL) DURING NO~BER 1999.

2. MONITORING 'Ml.l. LOCATIONS MW-1 lHROUCH MW-J V£RE SUR"t£'1'm BY NIAGARA M<JiAWK. MONITORING WELL LOCA TIOH MW-4, WAS SUR'£Y£0 BY B8L

J. ~IFlCATIOH SOL SAMPLING LOCATIONS ANO SEDtMENT SAMPL.NG LOCA TIOHS ARE BASED OH FlEl.D MESlJREMEHTS ANO ARE APPROXIMATE.

4. 'f€RIFICATIOH SAMPLE \'5-16 WAS A COMPOSITE SAMPLE OF 4 SlJBSAMPl.ES CCILLEC'TED FRCM EA<>I SDEWALL OF TI-£ APPROXIMAlU.Y :; f'OOT DEEP EXCAVATION LOCATED ADJACENT TO "telflCATION SAMPLE LOCATl<»I W-5.

0 50' 120' b ;;;;;! I

GRAPHIC SCALE

RELIANT ENERGY FORMER NIAGARA MOHA'M<, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

APPROXIMATE SOIL EXCAVATION LIMITS AND VERIFICATION SOIL AND

SEDIMENT SAMPLING LOCATIONS

BBL II.AS.NCI 90IJCX • LH N:. • 11tf11 e •n •1 c /e111f1fl

FIGURE

6

X: JU4.JX01.DWO T: NOH£ L: ON•": Cl'r-f//U' I": ~AO(S(T/~1.T-IL •/ U/04 "11-~IQ 3M4l014/3M43C02.0WG

\

~ PC8• • PO. YQ-ILORINA TED BIPHDl'r\.S.

8. ALL C:O.CENTRA TIONS ARE REPORTED IN PARTS PER MIUJON (PPM).

7. D - COHCENlRATlON IS BASED OH A OIWTED SAMPLE ANALYSIS.

& J • ESTlMA lEO COHCEHlRA llON.

~

S0-101 ~ APPROXIWATE SEDIMENT SAMPLING LOCATION

RS-NA

,,.._,o

w- 1•

vs-1 •

CJ CJ CJ rzzJ

APPROXIMATE RIVERBANK SOIL SAM PUNG LOCATION

APPROXJMA'rE VERIFlCATION SOIL SAMPLING LOCATION PRIOR TO REACHING FlNAL EXCAVATION LIMITS

APPROXIWATE FlHAL VERIFICATION SOIL SAMPLING LOCATION Al.ONG EXCAVATION fLOOR

APPROXIWATE VERIF1CATION SOIL SAMPLING LOCATION ALONG EXCAVATION WAL!.

APPROX1MATE LIMITS Of' SURFACE SOIL REMOVAL (TO A DEPTH OF 1 FOOl)

APPROXIMATE LIMITS OF SUBSURFACE SOIL REMOVAL (TO DEPTHS RANGING FROM 2 FEET TO 4 FEEl)

APPROXIMA'TE LIMITS CF SUBSURFACE SOIL REMOVAL. (TO A DEPTH OF APPROXIMATELY 5 FEEl)

APPROXIMATE LIMITS C$ SURrACE ANO SUBSURFACE SOIL REMOVAL (TO THE TOP OF BEDROCK)

MW-3 + MONITORING Vill LOCATION

SHORELINE

- - - -- -TOP OF BANK

FENCE

- -CM-- OVERHEAO HIGH VOLTAGE ELECTRIC LINE

APPROXIMATE LOCATION OF B-INCH DIAMETER HOPE REPLACEMENT DRAIN PIPE

lillmi;.

1. BASE MAP OC'tnOPED FROM SITE SURVEY COMPL£1ED BY NIAGARA MOHA'M<, A NATIONAL GRID COMPANY (NIAGARA M~A'M<) (AS PRESDHEO ON THE NIAGARA MOHA'MC ORAwt<4G onnuD "S<>fOCl_ STREET DE\£1.0PMENT SAMPLING LOCATIONS. INDEX NO. 2.0-S12-W5, DRAWING NO. 9-"591-E. DATED APRIL 1999, LAlEST RE'ASIC»il MAROi 2001, AT A SCAlf Of'

~~~~:1l': ~~c;:~~~B~f.u~~ Bl.ASL.ANO, BOUCK &: lE£. INC. (BBL) CURING NO~Bm 19Sl8.

2. MONITORING 'lll£ll LOCATIONS MW-1 niROUQi MW-Ji 'lllERE SUR~D BY NIAGARA MOHAWK. MONITORING 'lllELL LOCA llON MW-4, WAS SUR~ BY BBL

Ji. ~CA 110N SOIL SAM PUNG LOCA T>ONS ANO SEDIWEHT SAM PUNG LOCATIONS ARE BASED ON nEl.O MES1JREMENTS ANO ARE APPROXIMATE.

4. \'£W'ICAllON SAMPLE YS-15 WAS A COMPOSllE SA.tiA..£ OF 4 SUBSAllPl.ES COLLECTED FROM EACH gDEWALL OF THE APPROXIMATELY 5 FOOT DEEP EXCAVATION LOCAlED ADJACENT TO \€RiflCA 110N SAMPLE LOCA 110N W-~

0 60' 120'

'°'""' d I GRAPHtC SCAL£

RELIANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STA 110N - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

Cl, < • EAQ-1 AROCLOR WAS NOT OETEClED AT A COHCENTRA TlON ABOVE n£ REPORTED LASatATORY DETECTION LIMIT.

FINAL VERIFICATION SOIL AND SEDIMENT SAMPLING RESULTS FOR

TOT AL PCBs (ppm) 10. ANALYTICAL RESULTS HA'.£ BEEN VAUDATU>.

BBI: M...4.5UHO, l!IOUCIC • LU , NC. • 1t 11' l1t •• H • • cl• 1t,,,lt

flGURE

7

' ', \ ' \

\ \ _> \

\ " .......... _._....

ll: 3"43X02.DWG I.: at-•, Df'f"•ll[r,SHD-2S.l P: PMlESET/Pl.T-81..

\ ~

FORMER WATER PUMP LOCATION

APPROXIMATE LIMITS OF SEDIMEN T DREDGE SPOIL AREA

9/'l .l/04 S"nt-M-lllCB KM() l!:C8 JMucn•~DWC

S0-1o5 PC8s I TOC <X>.04 I 4.820

\

TOC ··-4.400 1.700 3.llSO

230

TOC e.9JO 17.400

SD-13 PCS• TOC 0.01~ J MJO 0.46 17.500 o.o~ J,030 <0.021 7.2'60

SD-13

LEGEND:

SD-105 lii"I

so-100

IRM SEDIMENT SAMPLING LOCATION (9/ 02)

Rl/FS SURF ACE SEDIMENT & SEDIMENT CORE SAMPLING LOCATION (10/00 & 12/ 00)

T2-3 • SEDIMENT PROBING LOCATION (11 / 99)

SD - 6 ~ PSA SURFACE SEDIMENT & SEDIMENT CORE SAMPLING LOCATION (11 /99)

NOTES:

MW--3+ MONITORING WELL LOCATION

SHORELINE

TOP OF BANK

--X--- FENCE

APPROXIMATE DITCH LOCATION

---CH--- OVERHEAD HIGH VOLTAGE ELECTRIC LINE

SEDIMENT TRANSECT LINE

1. BASE MAP 0£\n.OPED FROM SITE SUR\IEY COMPL£lEO BY NIAGARA WOHA'M< POv.ER CORPORATION (NMPC) (AS PRESENTED ON THE NMPC DRAWING ENTIT\£0 • sa-tOOL STREET OEVEL.OPMEHT SAMPLING LOCATIONS. INDEX NO. 2.0-512-M~. DRAWING NO. B-JJ~91 -E. DATED APRIL 1999, l.AlEST REVISION MAROi 2001, AT A SCAl..E OF 1· -60°). LOCATION OF ICE FENDER. TOP OF BANK, AND HIGH VOl.TAGE LINE ARE FROM SUR'KY ACTIVITIES COMPLElED BY BLASL.ANO, BOUCK &: LEE. INC. {BBl) DUR~C NO~BER 1999.

2. MONITORING WELL LOCATIONS MW-1 ™ROUGH MW-J v.ERE SURVEYED BY NMPC. MONITORING WEll MW-4, AHO EACH Of THE SEDIMENT PROBING LOCATIONS WERE SUR~ BY BBL

J. MC»llTORINC WEU. LOCATION MW- 2S CS AN O\'£RBUROEN MONITORING ¥ICLL WHl.£ MONITORING WEl.l MW-20 IS A BEDROCK WEl.L

4. SEDIMENT SAMPLING LOCATIONS ARE BASED ON AELD MEASUREMENlS AND ARE APPROXIWATE..

5. PCB• - POL YO-ILORttA TED BIPHENYLS.

S. TOC • TOTAL ORGANC CARBON.

7. ALL CONCENlllATIONS ARE REPORTED IN PARTS PER MIWON (PPM).

8. D - CO.CEHTRATION IS BASED ON A DILUTED SAMPLE ANALYSIS.

9. J - ESTlMA TED CONCENTRATION.

10. < • EAOi AROCLCR WAS NOT OElECTID AT A CONCENTRATION ABO\£ THE REPORTED LABORATORY DETECTION UWIT.

11. NA - NOT ANAL YlED.

12. ANALYTICAL RESUL'TS HAVE BEEN VAUOATID.

0 SO' 120'

"'""' ;;;I ' GRAPHIC SCALE

RELIANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY

--~~9_':'.._Q~1;D _R_EM_~Q~UC.I!p~ _P.h(lli__ _

FIGURE

8

...... P: PAOCSl['T/PlT-a 9/13/04 5'1'11!-$+-l'Q. • .., lllCI 3U43014/~

' \ \

' ' \

LEGEND:

-· • SEDIMENT PROBING LOCATION

so-a 0 Rl/FS SURFACE SEDIMENT & SEDIMENT CORE SAMPLING LOCATION {10/00 - 2/01)

T4 TRANSECT LINE

NOTES:

1. BASE MAP DE\'ELOPED FROM NIAGARA MOHAN< PO'lllER CORPORATION (NMPC) AS-BUil T DRA'MNG DITin.£0 •sotOOl 5TREET HYDRO DE\£1..0PMENT: CANAL WAU.. REPLACEMENT CENERAL Pl.AN, LOCATION MAP, GENERAL NOTES ANO DWG. INDEX.• F1l£ INDEX NO. 2.0-S12-H4, DRA'MNG NO. 0-30M4-E, ORtQNAl ISSUE OAlE 8/30/94, AS-BULT 9/95. AT A SCALE OF 1•- 200•.

2. BASE MAP ALSO OE'.n.OPED FROM STE SUR\.iEY COMPLETED BY NMPC (AS PRESENTED ON TliE NYPC DRA'MNG ENTin.£0 ·~cxx.. STREET DE\€1.0PMENT SAMPUHG LOCATIONS. INDEX NO. 2.0-S12-M.5. DRA'MNG

CANAL TUNNEL INTAKE STRUCTURE

NO. 8-33591-E. DATED APRL 1909, LATEST RE\4SION MARQi 2001, AT A SCALE Of 1• •50'). LOCATION Of la: F'EN0£R IS FROM SUR\.iEY ACTI'v\TES COMPl£TED BY Bt.ASL.ANO, BOUCK • L£E. INC. (BBL) DURiNG N0\918ER, 1909.

3. TRANSECT LOCATIONS n TliACt.IGH T7 WERE SUR\€YED BY BBL 'TRANSECT LOCATIONS Tl TliAOUGH T12. IERE POSITIONED REl.ATTVE TO EXISTING SITE FEATIJRES. AS SHO~.

4. PC8• • POLYC>ILORINATED BIPHCNYLS.

5. T0C • TOTAL ORGANIC CARBON.

el. AU. CONCENlRATIONS ARE REPORm> IN PARTS PER MIWON (ppm).

7. < • EACH AROCLOR WAS NOT DETECTED AT A CONCENTRATION ABCM: lHE REPORTED LABORATORY DETECTION LIMIT.

a. NA • NOT ANAL YlED •

9. J • ES11MA TED ~TRA TION.

\

' ) l

. l COHOCS I FAUS~n1

SD-19 th I PCS•

o-o.5') I 0.126 0-0.5'} CUP I 0.105

SD-24

--- _ , q,_

SD-15 .... PCSa 0-1 .5 0.018 J 1.5-3" < 0.022 3-l.5' 0.013 J l.5-4' 0.015 J l.5-4' DUP 0.048 4-4.5' 0.04 4-4.5' DUP NA 111 000 4.5-5} O.G47 JJ NA

TOC J0,700 7.3"0

)!pth I PCB• I TOC 0-0.S) 0.092 NA 0 400' 800'

1--i d ' GRAPHIC SCALE

RELIANT ENERGY FORMER NIAGARA MOHAWr<, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

SEDIMENT SAMPLING LOCATIONS AND ANALYTICAL RE SUL TS FOR TOT AL

PCBs & TOC (ppm)

BBL: ~. k)IQ • ULINC

FIGURE

9 - --

)l:)l64,1)(02.0'fllQ L: ~~t:n·RU P:PA()[stffl'l.T- 81. l/IJ/04 S'l1t-$4-llCI IOIO ltC9 3M4301&/ lM4JI0'7.DWC

\

\.~\ TOWER "k' '\ , '\ "',

~\ ''\"' [ ~\'\ '\ ~ '\ '"'' I '\ ""-, . \ \ "'-, \ ~\ \ \ "'-,"' ,: __ .

\ \ \\ '~, SD-1~ + \ + "' ··. \ ~ \ \ MW-~ '-....

\

\ '- SD-10 + \ MW-3 '

\ \ \\ ~' S0-103 -~ + '-. . \ ~ \ \ --......... _ .......... .

+ \ \ \ ' \ \ SO \ \ \ ,,._), . \ ~ \ MW-2S \ \ \ ,,._, \ I

+\ \ \' I + ~ \ \ ' \

\ I + \ \ '

\ TOWER ,./\\ \ ~ \ \ < ~ \ \ \ CON · \

\ \ ' \ AD +\ \ ' ~1' '

\ \ ~' I i •u··~ +\ \ \ ,..,6' , ; APPROX~~ENT DREDGE \ ~ \ ~ c 0- \ OF SEDIM

\ \ \ "Wo , ; SPOIL AREA + \ \ v· , \ ' \ \ \ \ \ -1'0, ' \ \ ,..,", \ +\ \ \ \ \ ' \

\ ~\\ \ \ \ \ +\ \ \ \ ' ' \ \ \ . \ \ \

+ \ \ \ ' \ \ \ ' \ \ IS- \ \ \ \ +\ \~ ,\\, '

\ \ \ l._ + \ \ \ \ (_ ......... \

\ ' IS- '\\ '. \ +\ \ \ ,.> •

\

S0-13 0

LEGEND:

SD-101 1ia IRM SEDIMENT SAMPLING LOCATION (9/02)

S0-8 Q Rl/FS SURFACE SEDIMENT AND SEDIMENT CORE SAMPLING LOCATION (10/00 &: 12/00)

SD-6 l!J PSA SURFACE SEDIMENT AND SEDIMENT CORE SAMPLING LOCATION (11/99)

MW- 3+ MONITORING WELL LOCATION

c:::J EXTENT OF SEDIMENT ADDRESSED BY SEDIMENT CAPPING AND REMOVAL ALTERNATIVES

T-2--- SEDIMENT TRANSECT LINE

SHORELINE

TOP OF BANK

FENCE

--OH£-- OVERHEAD HIGH VOLTAGE ELECTRIC LINE

NOTES:

1. BASE MAP DEVELOPED FROM SITE SUR\'£'1' CCMPLETED BY NIM:ARA MOHAN<, A NATICllAL GRID COMPANY (NIAGARA MaiA'M<) (AS PRESENTED OH THE NIAGARA MOHAWK ORA._.G EHTin.£D •SOioa... SlRE£T DE\t1...0PMEHT SAMPUNC LOCA llOHS. INDEX NO. 2.0-$12-MS, DRAWING NO. B-33501-E. OATm APRIL 1999, l.AlEST RE\iSIOH MARQi 2001, AT A SCAL£ Of 1·-eo'). LOCATION OF ICE FENDER, TOP OF BANK. AND HIGH YOLTAGE LINE ARE FROM SUR\'£V AC11\111ES OOMPlETED BY Bl.A9..AHD, BOUCK at L£E. NC. (BBL) DURING NO\'EMBER 1WU.

2. WONITCRNG El. LOCATIONS MW-1 THROUQ-1 MW-3 YIERE SUR\'£YEO BY NIAGARA MOHA'M<. MONTORING VIEU. LOCATION MW-4, W/.S SURVE'l'm BY BBL

J, SEDIMENT SAM PUNG LOCATIONS ARE BASED OH FIELD MESUREMENlS AND ARE APPROXIMA lL

4, LIMITS Of' SEDIMENT ADORESSEO BY SEDIMENT CAPPING ANO REMOVAL. ALTERNATI\t:S ARE BASED OH LINEAR INTERPa.ATION BETM:EN ADJA.C[NT SAMPLING LOCA~S TO A PCB SEDIMENT CONCEHlRA~ ~ 1 PART PER WIWON.

0 llO' 120' I>-! ;;;o;1 I

GRAPHIC SCALE

RELIANT ENERGY FOR"4ER NIAGARA "40HA'M<, A NATIONAL GRID COMPANY

SCHOOL ST. HYDROELECTRIC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

SEDIMENT CAPPING AND REMOVAL ALTERNATIVES - PROPOSED LIMITS

FIGURE BBL: ~~· LEI·~ 10

)(:)t44.JX02.0'llO l.: CH•"; OfT•REF" Po: PACESET/Pl.T-lll 9/13/tM S"m-~ KLS ltC9 lN4JO't4/3M4JIOILOllllO

\ \, 'S\'"0\\

TOWER \\\ \

.. \ \ [ 'S\\\ \\,\ I \ \ '" \ ' x \\ "' \

\ '"' 'S\ \ \ ' -, SD-lD + \ "' -.. \

\ \\ , \_ SD-1~~-~1 + \ .. '" ··. . 9'1.-1 06

\ 'S \ M~4 ,,

+ \ \ \ ', SD-10 "'···~ \

\ \ MW-3_& ··.

\ Y\ S0-103 +\ \\ '-~ 'S \ -+ \ \ \ ""-,'\, SD-"\04 \ \ \ ,._~ '

+ \ :;.,.- \ \ 'S \ ~-~ \ \.~, \ I . T-2 T2-3

T-1 +\ \ \' I + ~ \ \ ' \

\ I . W 1 1

@su 12 ·T1-3

+ ~ \ ' \

+ / \ \ ' \

\ TOWER ,,-.\\ ~\ ! \

( 'S \\\CON . \ ·,

\ \ ' \ AD \ +\ \ \ '"1> ' \ \ ' ~ ~ '

\ \ ~ I i rr '"'" +\ \ \ '~~ , \ APPROX~~E'i; T DREDGE \ cs \ 'Cl0- \ OF SEDIM

+ \ \ \ ~U' ;.._ , \ SPOIL AREA \ \ \ \110 \ ··.

+ \ \ ""'' \ \ \ 'S \ \\ \ \ + \ \ \ \\ \ \

\ \ \ . \ \ \ + \ \ \ \ \ \ \ ' I. \'S~ \ \\ \ \ + \ \ \ ' ' \

\ \ \ \( \ + \ \ \ '""' \ \ \ 'S ', \ \ " \ \ \ \ -

\

S0- 13 0

LEGEND:

SD-lOl lii'!I IRM SEDIMENT SAMPLING LOCATION (9/02)

S0-80 Rl/FS SURFACE SEDIMENT ANO SEDIMENT CORE SAMPLING LOCATION (10/ 00 & 12/00)

SD-6~ PSA SURFACE SEDIMENT AND SEDIMENT CORE SAMPLING LOCATION (11/99)

MW- 3+ MONITORING WELL LOCATION

c::J POTENTIAL EXTENT OF SEDIMENT REMOVAL TO A DEPTH OF 1 FOOT.

T-2--- SEDIMENT TRANSECT LINE

SHORELINE

- ---- TOP OF BANK

-x--x- FENCE

--OH<-- OVERHEAD HIGH VOLTAGE ELECTRIC LINE

NOTES:

1. BASE MAP DEVELOPED FROM SllE SURVEY COMPL£1ED BY NIAGARA WCl"IA'M<, A NAllOHAL GRID COMPANY (NIAGARA MOHAWK) (AS PRESENTED ON TI-IE NIAGARA M<»IAWK DRAWING onm.ED .SQiOOl STREET DE\n.OPMENT SAMPLING LOCATIONS. IHOEX NO. 2.0-S12- M$. DRAWING NO. B-J.J591 - E. DATED APRIL 1099, lAl[ST RE't1SION MAROi 2001, AT A SCALE OF 1· -eo'). LOCATION Of ICE. FENDER. TOP rs BANK, AHO HIGH VOLTAGE LINE ARE FROM SURVEY ACTI\fTIES ca.IPL£TED BY BLAS..AHO, BOUCK I: LEE. NC. (BBL) DURING NO\£MBER 1 i89.

2. WOHITORING 'll£ll. LOCATIONS MW-1 THROUQi MW- J WERE SURVEYED BY NIAGARA MOHAYK MONITORING M'.l.L LOCATION MW-4, WAS Sl.RVEYEO BY 88L

J. SEDIMENT SAM PUNG LOCA llONS ARE BASED OH flU.0 MESUREMENTS AND ARE APPROXIMATE.

o ea' 120• M ;;;;;! I

GRAPHIC SCAl£

RELIANT ENERGY FORMER NIAGARA MOHAWK, A NATIONAL GRID COMPAN Y

SCHOOL ST. HYDROELECTI<IC STATION - COHOES, NY PROPOSED REMEDIAL ACTION PLAN

FOCUSED SEDIMENT REMOVAL ALTERNATIVE - PROPOSED LIMITS

BBL ltA.1l.AND IOUOC • UI. 1i1C ...--.~

FIGURE

11