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DRAFT
200 4 RIGG S BROO K SEDIMEN T MONITORIN GREPOR T O'CONNO RCOMPAN Y SUPERFUN D SIT E

AUGUSTA , MAIN E DECEMBE R200 4

# I 

# TABL E O F CONTENT SDRAF T

200 4 RIGG S BROO K

SEDIMEN T MONITORIN GREPOR T TABL E O FCONTENT S
SECTIO N TITL E PAGE NO

. EXECUTIV E SUMMAR Y 1 1

. INTRODUCTIO N 4 2

. SEDIMENT/WETLAN D SOILSAMPLIN G5 2. 1 Genera l Weathe r

an dStreamCondition s 5 2. 2 Sediment/Wetlan dSoi l Sampl e Location s 6 2. 3 Sediment/Wetlan dSoi l Sampl e Collectio n Method s 1 0 2. 4 Compositio n o f

Sediment/Wetlan dSoil s ! 1 1 3

. SEDIMENT/WETLAN D SOI LANALYTICA LMETHOD S AN D RESULT S 1 2 3. 1 Sediment/Wetlan dSoi l Analytical Method s 1 2 3. 2 Sediment/Wetlan dSoi l Monitorin g Result s 1 2 3. 3 Sediment/Wetlan dSoi l Quality Contro l Result s 1 4 3.3. 1 Evaluatio n o f

Quality Contro l Element s 1 4 3.3.1. 1 Dat aCompletenes s 1 4 3.3.1. 2 Metho dBlank s 1 4 3.3.1. 3 Surrogat e Recoveries...

. 1 5 3.3.1. 4 Equipmen t

an dFiel dBlank s 1 5 3.3.1. 5 Calibratio n Result s 1 6 3.3.1. 6 Matri x Spike Sample s 1 6 3.3.1. 7 Laboratory Contro l Sample s 1 7 3.3.1. 8 Fiel dDuplicat e Sample s 1 7 3.3.1. 9 Sampl e Quantificatio n 1 8 3.3. 2 Summar

y o f Quality Contro l Sampl e Result s 1 8 3.3. 3 Evaluatio n o f

PARC C Parameter s 1 9 3.3.3. 1 Precisio n 1 9 3.3.3. 2 Accurac y 2 0 3.3.3. 3 Representativenes s 2 0 3.3.3. 4 Completenes s 2 0 3.3.3. 5 Comparability 2 0 4

. SUMMAR Y O F200 4 SEDIMENT/WETLAN D SOI LANALYTICA LRESULT S 2 2 4. 1 Compariso n o f

200 4 Sediment/Wetlan dSoi l Analytica l Result s t o Targe t Leve l 2 2 4. 2 Compariso n o f

200 4 Sediment/Wetlan dSoi l Analytica l Result s t o Previou s Sediment/Wetlan d Soi l Dat a2 2 4. 3 Mann-Kendal l Statistical Tren dTes t 2 2 5

. CONCLUSION S AN D RECOMMENDATION S 2 6

WOODARD&CURRA N (212004.01 ) TO C - i 12/02/200 4 DRAF T SE D RP T 200 4200 4 RIGG S BROO K SEDIMEN T MONITORIN GREPOR T TABL E O FCONTENT S

LIS T O FFIGURE S FIGUR E TITL E DRAF T

PAGE NO

. Figur e 1 : Total PCB s i n Rigg s Broo k Sediments/Wetlan dSoils-Septembe r 2003

. Figur e 2 : Total PCB s i n Rigg s Broo k Sediments/Wetlan dSoils-Upstream& Downstream Septembe r

200 3 Figur e 3 : Supplemental Samples , Tota l PCB s i n Rigg s Broo k Wetlan dSoils/Sediments

Septembe r

200 3 9

LIS T O FTABLE S TABL E TITL E PAG E NO

. Tabl e 1 Tabl e 2 Tabl e 3 Tabl e 4 Concentration s o f PCB s Exceedin g th e Targe t Leve l o f 5 mg/k g 2 Monthl y Rainfal l 199 6 - 200 4 Augusta , M E 5 200 3 Rigg s Broo k

Sediment/Wetlan dSoi l Monitorin g Sampl e Result s 1 3 Compariso n o f

200 4 Sediment/Wetlan dSoi l Monitorin g Result s t o Historica l Result s 2 4

LIS T O FACRONYM S AN D ABBREVIATION S LIS T O FREFERENCE S

APPENDICE S Appendi x A : Sediment/Wetlan dSoi l Samplin g Surve y Dat a Appendi x B : 198 7 Remedial Investigatio n Rigg s Broo k Sedimen t an dBiot aDat a Appendi x C : Man n Kendal l Tren dAnalysi s Sedimen t Sampl e Result s 199 6 - 200 4

WOODAR D & CURRA N (212004.01 ) DRAF T SE D RP T 200 4 TO C - i i 12/02/200 4

# I EXECUTIV E SUMMAR YDRAF T

EXECUTIV E SUMMAR Y
In accordanc e wit

hth e Rigg s Broo k

Sedimen t

an dBiot aSamplin g an dAnalysi s Plan (SAP ) (W&C , 1997) , sedimen t

samplin g a

t Rigg s Broo k

wa s complete do n September 1 3 an d14 , 2004

. Thirty-si x sediment/wetlan dsoil-monitorin g sample s (excludin g quality contro l sample s suc ha s duplicates ) wer e collecte ddurin g th e 200 4 samplin g event
. Sample s were collecte da t al l o f th e origina l twenty-fou r

location s propose di n th e SAP (800 1 t o 8023) , an da t location s 803 9 an d3018 , whic hwer e adde dt o th e progra mi n 1998

. In conjunctio n wit

hasupplementa l samplin g gri dthat wa s sample din 2000 , te n additional sedimen t sample s wer e collecte din an are abetwee n th e former Sourc e Contro l Are ao f th e O'Conno r

Compan y Superfun dSite (th e Site ) an dRigg s Brook

. Sample s 9B000 , 9C000 , 9C025 , 9C050 , 9C075 , 9C10 0 an d 9C12 5 wer e sample di n 2000

. Location s 9A925 , 9B92 5 an d9C925 , eas t o f th e former

200 0 supplementa l grid , wer e adde din 200 1 an dwere sample dagai n thi s year . Th e purpos e o f collectin g thes e additiona l sample s wa s t o confirmdetection s o f targe t PC B Arochlor s reporte dfor location s o n th e supplementa l gri di n 200 0 an dt o establis hi f ther e are any trend s withrespec t t o sedimen t

sampl e concentration s o f

PCB s throug htime

. Sedimen t sample s were collecte dusin g a4-foo t long , 1.5-inch diamete r acetat e macrocor e line r at submerge dlocations

. At dr y locations , acore-samplin g devic e wa s manuall y pushe dapproximatel y si x inche s int o th e groun dt o collec t wetlan dsoils

. Th e sediment s an dwetlan dsoil s collecte di n 200 4 primaril y consiste do f

clay

. Th e to p portio n o f

wetlan dsoi l sample s often containe droot s an dgrass . Th e soi l wa s shake n fromth e root s an dinclude di n th e sample

. However , th e root s an dgras s were discarde d
an dwer e no t

include da s part

o f th e sampl e matrix

. Sedimen t an dwetlan dsoi l sample s were thoroughl y homogenize di n stainles s stee l bowl s prio r t o placemen t

into sampl e jars

. PC B concentration s for

al l sediment/wetlan dsoi l sample s collecte ddurin g th e 200 4 progra mwer e compare dt o atarge t

leve l o f 5 mg/kg

. Tota l PC B concentration s were belo w thi s targe t leve l i n 3 4 o f

th e 3 6 (94% ) samples

. PCB s exceede dth e targe t leve l a t tw o sampl e location s (301 8 at 1 8 mg/kg an d800 4
at 8. 2 mg/kg)

. Th e averag e concentratio n o f tota l PCB s fo

r th e thirty-si x sample s (usin g detectio n limi t value s for non-detec t

samples ) wa s 1 mg/kg

. Tota l PCB s range dfromnon-detec t t o 1 8 mg/kg

. Th e 2004-sediment/wetlan dsoi l result s were compare dagains t historica l result s from198 7 an d199 6 throug h200 3 wit

hth e followin g observations

.

WOODARD&CURRA N (212004.01 ) Page l 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

Concentration s o f

tota l PCB s at

sampl e point s upstreamo f th e Site hav e bee n belo w detectio n limit s every year

i n whic hsample s hav e bee n collecte dan danalyzed

. Fo r th e are ao f

Rigg s Broo k

adjacent t o th e Site , PCB s wer e no t detecte dabov e th e targe t leve l o f 5 mg/k g at an y sampl e location s in 1987 , 199 6 an d2003

. Fro m199 7 t o 200 2 an din 2004 , ther e wer e sporadi c exceedance s o f

th e targe t leve l a t on e o r tw o location s pe r

year , a s show n i n Tabl e 1 below

.
TABL E 1 : CONCENTRATION S O FPCB s EXCEEDIN GTH E TARGE T LEVE LO F5 MG/K G ll%:catioii 

## W99' %

::.vE,@Bs; i .^'BCB^ y 

## i(mmg) i 

# m m 

## iims/M

m 800 4 2 9 8. 2 801 3 5. 7 J 301 8 6. 4 6. 1 5.6 3 J 800 6 15. 9 1 4 10. 4 Notes : Indicate s that

th e concentratio n o f

PCB s wa s belo w th e targe t leve l o f 5 mg/kg

A t th e reques t

o f th e USEPA , fifty-one sedimen t sampl e points , locate dalon g agri dbetwee n th e Site an d Rigg s Brook , wer e adde dt o th e sediment-samplin g progra mi n 2000

. Al l sample s collecte da t point s fromthi s gri dha dconcentration s o f total PCB s belo w th e targe t leve l o f 5 mg/kg excep t

9B000 , 9C050 , 9C07 5 an d9C125

. Eac ho f thes e points , plu s several other s that ha dno t exceede dth e targe t

level , were re-sample di n 2001

. Thre e additiona l points , 9A925 , 9B92 5 an d9C925 , wer e als o sample di n 2001

. Th e sam e 1 0 location s o n th e supplementa l gri dthat were sample di n 2001 , 200 2 an d200 3 wer e re-sample di n 2004

. PCB s were detecte dat al l 1 0 location s an dconcentration s range dfrom0.05 8 mg/kg at 9C02 5 t o 2. 1 mg/k g at

9C100

. Result s for

othe r 200 4 sample s wer e simila r t o concentration s reporte dpreviously

. A s i n 2001-2003 , i n 2004 , non e o f th e sample s collecte dat thes e 1 0 additiona l location s exceede dth e targe t level

. Downstrea mo f

th e Site a

t sampl e location s 801 8 throug h8023 , detecte dconcentration s o f tota l PCB s hav e historicall y bee n belo w th e 5 mg/k g targe t level

. Trac e concentration s o f PCB s hav e bee n sporadicall y reporte dfo r on e o r

mor e o f

thes e location s throughou t th e years .

WOODAR D & CURRA

N (212004.01 ) DRAF T SE D RP T 200 4 Pag e 2 12/02/200 4DRAF T

In accordanc e wit

hth e SAP , aMann-Kendal l statistica l tren danalysi s wa s use dt o determin e i f concentration s o f

total PCB s in sedimen t

sample s collecte dbetwee n 199 6 an d200 4 indicat e atrend

. Th e result s o f thi s tes t d o no t indicat e an y significan t trend s relativ e t o increase s o r decrease s in PC B concentration s a

t 3 3 o f th e 3 6 sample s collected

. Downwar dtrend s were indicate dat tw o sampl e location s (800 6 an d9C075)

. An upwardtren dwa s indicate dat sampl e locatio n 9A925

. However , concentration s o f

PCB s at 9A92 5 hav e bee n les s than 1 mg/kg for th e fou r year s o f dat aprovided , an d hav e bee n essentiall y th e same from200 2 t o 2004

. Tw o sedimen t

samplin g location s exceede dth e targe t leve l fo r PCB s o f 5 mg/k g thi s year , 301 8 (1 8 mg/kg ) an d800 4 (8. 2 mg/kg)

. Th e sporadi c exceedance s o f th e targe t leve l o f 5 mg/k g may b e du e t o th e sorptiv e natur e o f

PCBs

. PCB s ar e more likel y t o sor b t o soil/sedimen t

wit hahig horgani c content
. Du e t o th e heterogeneou s natur e o f sediments , PCB s coul dsporadicall y b e detecte dat concentration s abov e th e targe t level

. Th e physical transport o f PCB s o n soi l particle s withwate r runof f can als o resul t

i n redistributio n o f

concentration s t o area s wher e wate r collect s o r

pools

. Howeve r

sedimen t

sampl e concentration s d o no t

indicat e that

PCB s hav e migrate dint o Rigg s Broo k sinc e th e completio n o f th e Sourc e Contro l Remedial Actio n in 1997

. Base do n pas t data , PC B concentration s that sporadicall y excee dth e targe t

leve l hav e no t

bee n show n t o b e relate dt o concentration s o f PCB s detecte di n biot a collecte dfromRigg s Brook

. In fact , base do n biot asampl e result s fo r 1987 , 199 7 an d2000 , concentration s o f

PCB s hav e al l bee n belo w th e targe t leve l o f 2 mg/kg an dhav e generall y decrease d from198 7 t o 2000

. Therefore , base do n thes e conclusion s an dth e fact that th e Marm-Kendal l Tren dTes t result s fo r 200 4 sedimen t

sampl e result s d o no t

indicat e an y significan t

trends , n o remedia l actio n i s recommende dat

thi s time

.

WOODAR D & CURRA N (212004.01 ) Pag e 3 12/02/200 4 DRAF T SE D RP T 200 4

# SECTIO N 1DRAF T

I

. INTRODUCTIO N Thi s documen t

constitute s th e 200 4 Rigg s Broo k Sedimen t

Monitorin g Report

(Report ) fo

r th e O'Conno r Compan y Superfun dSite (th e Site ) i n Augusta , Maine

. In Apri l 1996 , th e U.S

. Environmenta l Protectio n Agenc y (USEPA ) designate dRigg s Broo k a s Operabl e Uni t

3 (OU-3 ) o f

th e Site

. Thi s Report

ha s bee n prepare db y Woodar d& Curran Inc

. (W&C) , th e Supervisin g Contractor , o n behal f o f Central Main e Powe r (CMP) , th e Settlin g Defendan t i n accordanc e wit

hth e Consen t

Decre e i n Unite dState s o f Americ a V

. Central Main e Power , Civi l No

. 900302B , entere don Septembe r 3 , 1991 , an dth e Explanatio n o f Significant

Difference s (ESD) , approve dan dissue db y th e USEP A o n Jul y 11 , 1994

. Thi s Report

present s th e analytica l result s o f th e 200 4 sedimen t

samplin g activitie s complete da t OU- 3
an dprovide s acompariso n t o sedimen t dat acollecte dfrom199 6 throug h200 4 an dt o th e sedimen t dat a generate da s apart

o f th e Remedial Investigatio n Report for th e Site , Volum e I (RI ) complete db y E.C

. Jordan i n 1987

. Th e 200 4 sediment-samplin g even t wa s conducte din accordanc e withth e Rigg s Broo k Sedimen t an dBiot aSamplin g an dAnalysi s Pla n (SAP) , (W&C , 1997)

. Th e 200 4 samplin g even t represente dth e ninthannual sediment-samplin g even t sinc e remedia l actio n wa s initiate dat th e O'Conno r Site i n 1996

. Th e dat aquality objectiv e (DQO ) for eac hsediment-samplin g even t i s t o determin e i f

PC B concentration s ar e belo w 5 mg/kg a

t al l samplin g locations

. In accordanc e wit hth e SAP , th e analytica l result s fromeac h samplin g even t

wil l b e use dt o evaluat e whethe r additional samplin g i s necessary an di f further remedia l actio n withi n Rigg s Broo k i s necessary t o reduc e th e potentia l ris k t o human healthan dth e environment

. Sectio n 2 o f

thi s report

describe s general weathe r an dstreamcondition s durin g samplin g collection , sedimen t sampl e locations , sampl e collectio n methods , an dadescriptio n o f th e soi l type s fo

r th e sedimen t samples

. Sectio n 3 summarize s analytica l results , includin g associate dquality contro l result s for th e sediment/wetlan dsoi l samples

. Sectio n 4 present s acompariso n o f 200 4 sediment/wetlan dsoi l PC B concenfration s t o th e targe t level , an dt o previousl y collecte ddata

. Als o include di n Sectio n 4 ar e th e result s o f th e Mann-Kendal l statistical tren danalysis

. Sectio n 5 provide s conclusion s o f th e 200 4 samplin g even t

an drecommendation s fo r futur e actions

.

WOODARD&CURRA N (212004.01 ) Pag e 4 12/02/200 4 DRAFT SE D RP T 200 4

# SECTIO N 2DRAF T

2

. SEDIMENT/WETLAN D SOI LSAMPLIN G
Thi s sectio n describe s th e genera l streaman dweathe r conditions , th e sediment/wetlan dsoi l samplin g locations , th e collectio n method s an dgeneral sedimen t composition

. 2. 1 GENERA LWEATHE RAN D STREA M CONDITION S Thirty-si x sediment/wetlan dsoi l sample s were collecte di n Rigg s Broo k o n Septembe r

1 3 an d14 , 2004

. Th e weathe r

condition s durin g sampl e collectio n wer e clear withtemperature s aroun d6 5 degree s Fahrenheit

. Accordin g t o th e Nationa l Weathe r Service , rainfal l fo

r th e August aare awa s belo w norma l for Jun e an dJuly , an dwel l abov e norma l for August , 2004

. Du e t o th e increase drainfal l i n August , wate r level s a t several sampl e location s wer e hig hcompare dt o th e las t few years . Tabl e 2 show s monthl y rainfal l i n inche s fo

r th e thre e month s prio r

t o samplin g eac hyear , an dth e rainfal l durin g th e montho f September

.

^Year " 199 6 199 7 199 8 199 9 200 0 200 1 200 2 200 3 200 4 TABL E 2 : MONTHL Y RAINFAL L199 6 - 200 4 AUGUSTA , M E ..t.^\M,,- i ?^

. , : . "i^fpTS^ipitati6n(Indhfes)i'y^.'e'"- > *'-':K- * . •_,!. „ ? "

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^ ^^« ^ ^ Z ...MoiitK^^''^'-^-'' ' ' ^ '^--(<««f^ 2 -; . % '|./ ' ''f ^ F"^'June' ^ A-, „ 3.3 4 3.6 4 10.3 2 1.1 1 1.7 9 4.0 9 3.8 1 1.5 1 2.0 2 

### Ct

. ^v'jsiy."^ , : .

8.6 7 3.5 5 1. 3 1.54 6.3 3 2.1 2 2.0 2 1.6 7 2.4 8 ' _'. , Augu'st '

1.0 2 3.1 5 1.5 1 2.2 4 1.6 7 0.3 2 1.2 4.0 0 7.0 4 .,-.'#September"^ ^ '"• " 7.5 3 3.2 5 1. 6 11.2 9 1.6 4 3.9 8 3.2 8 6.2 1 2.3 9

WOODARD & CURRA N (212004.01 ) DRAF T SE D RP T 200 4 Page s 12/02/200 4DRAF T

2. 2 SEDIMENT/WETLAN D SOI L SAMPL E LOCATION S Th e thirty-si x sediment/wetlan dsoi l sampl e location s ar e illustrate di n Figure s 1 , 2 an d3

. Sampl e location s were relocate dusin g adigita l geographica l positionin g syste m(DGPS)

. Surve y dat acollecte d for th e sampl e location s i s presente din Appendi x A

. Sampl e collectio n bega n downstreamat sedimen t sampl e locatio n 802 3 an dprogresse dt o th e furthes t upstreamlocatio n a

t 8002B

. A s define din th e SAP , sedimen t sample s were collecte da t submerge dlocations , whil e wetlan dsoi l sample s were collecte da t non-submerge dlocations

. Downstrea mo f

th e Site , si x sedimen t

sample s were collecte dat interval s o f

approximatel y 120 0 feet from location s 802 3 t o 8018

. Th e furthes t downstreamsedimen t

sampl e location , 8023 , i s jus t upstreamfrom wher e Rout e 105 crosse s Rigg s Broo k (se e Figure s 1 an d2)

. Fiftee n sediment/wetlan dsoi l sample s were collecte do n a n approximat e 100-foo t

gri di n a n are ao f Rigg s Broo k adjacent t o th e Site

. Sampl e location s withi n thi s are ainclud e 800 3 throug h8017

. Wetlan dsoi l sample s continu e t o b e collecte dat sampl e location s 301 8 an d803 9 als o adjacent t o th e Site

. Initially , thes e location s wer e mistakenl y sample di n 1998

. Bothlocation s hav e bee n include di n th e Rigg s Broo k Sedimen t Samplin g Programevery year sinc e 1998

. In conjunctio n wit

hasupplemental samplin g gri dthat wa s sample di n 2000 , te n additional sedimen t sample s wer e collecte di n an are abetwee n th e Site an dRigg s Brook

. Sampl e location s 9B000 , 9C000 , 9C025 , 9C050 , 9C075 , 9C10 0 an d9C12 5 were sample di n 2000

. Location s 9A925 , 9B92 5 an d9C925 , whic har e eas t

o f th e 200 0 supplemental grid , wer e adde di n 2001

. Th e purpos e o f collectin g thes e sample s wa s t o monito r

detection s o f

targe t PC B Arochlor s reporte dfo r th e gri dlocation s i n 2000

. Thre e sediment/wetlan dsoi l sample s were collecte da s backgroun dsample s upstreamo f Rout e 1 7 an dth e Site

. In accordanc e withth e SAP , sediment/wetlan dsoi l sample s wer e collecte dat sampl e locatio n 800 1 approximatel y 20 0 fee

t upstreamo f

Rout e 17 , an dat

sampl e locatio n 8002 A approximatel y 30 0 feet upstrea mo f

Rout e 1 7 withi n adens e stan do f alde r trees
. A thir dbackgroun dsedimen t sample , 8002B , wa s collecte dapproximatel y 210 0 feet upstreamo f

Rout e 17 , near

a n abandone drailroa dtrestle

.

WOODARD&CURRA N (212004.01 ) Pag e 6 12/02/200 4 DRAF T SE D RP T 200 4

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8006.200 4 0.5 9 pp m 8008.200 4 <0.02 4 pp m 

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### i l 8015.200 4 <0.02 1 pp m

• ^ 8016.200 4 <0.02 4 pp m THRE E ADDITIONA L SEDIMEN T SAMPLE S (8021 , 802 2 & 8023 ) WERE TAKE N DOWNSTREAM A

T DISTANCE S O F APPROXIMATEL

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-CONFLUENC E O F EAS T AN D WES T BRANCHE S O F RIGG S BROO K 

### NOTE S
• BOUNDARIE S O F RESTORE D LAGOON S ESTIMATE D (1/98 ) BASE D O N WETLAN D RESTORATIO N PLA N (DRAWIN G C-12

. 100 % DESIGN , JULY 1996) , AN D NE W WETLAN D FINA L TOPOGRAPH Y (APPENDI X D DRAFT SCR AREPORT , DECEMBE R 1997)

. DES.BY : LE M | DR.BY : JB C | CK.BY : RD D O'CONNO R COMPANY SUPERFUN D SIT E 200 4 RIGG S BROO KSEDIMENT MONITORIN G REPOR

T nOUR E 1 

### TOTA L PCB s I N RIGG S BROO K SEDIMENTS/WETLAN D SOILS
5^FPTFMRF R 700 4 SCALE : r=200 ' DATE : NOVEMBE R 200 4 21200401-H001-M R JO B NO. : 212004.0 1 

# WOODARD&CURRA N Engineerin g • Scienc e • Operation s

### . , ;/6^^' "L\/ ' M L1)5/ ' : t

200 0 fee t

scal e 200 0 400 0

SIT E MA P COMPILE D FRO M U.S.G.S

. TOPOGRAPHI C QUADRANGLE S FO R TOGU S POND , MAINE , PHOTOINSPECTE D 1982 , AN D AUGUSTA , MAIN E PHOTO
INSPECTE D 1980

. DES.BY : LE M DR.BY : JB C CK.BY : RD D 0 CONNO R COMPAN Y SUPERRJN D SIT E 200 4 RIGG S BROO KSEDIMEN T MONITORIN G REPOR T FIGUR E 2 TOTA L PCB s I N RIGG S BROO K SEDIMENTS/WETLAN D SOIL S UPSTREA M AN D DOWNSTREA M O F SIT E SEPTEMBE R 200 4 SCALE : 1"=2000 ' DATE : NOVEMBE R 200 4 JO B NO. : 212004.0 1 SHEET : 21200401-H002-M R 

# WOODARD&CURRA N Engineerin g • Scienc e • Operation s

# r

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LEGEN D

TO P VALU E I S TH E SAMPL E LOCATION

. BOnO M VALU E I S TH E CONCENTRATIO N O F PCB s I N PP M O

R mg/kg

. FORME R ARE A3 O F TH E SIT E FORME R ARE A2 O F TH E SIT E

4 0 8 0

fee t

DES.BY : LE M DR.BY : JB C CK.BY : RD D O'CONNO R COMPAN Y SUPERFUN D SIT E 200 4 RIGG S BROO KSEDIMEN T MONITORIN G REPOR T FIGUR E 3 SUPPLEMENTA L SAMPLE S TOTA L PCB s I N RIGG S BROO K WETLAN D SOILS/SEDIMENT S ISFPTFMRF R ?n0 4 SCALE : 

### r=40 ' DATE : NOVEMBE R 200 4 JO B NO. : 212004.0 1 21174901-H003-M R 

## WOODARD&CURRA N Engineerin g • Scienc e • Operation sDRAF T

2. 3 SEDIMENTAVETLAN D SOI L SAMPL E COLLECTIO N METHOD S Th e sampl e collectio n metho duse dat eac hsampl e locatio n i s discusse di n thi s subsection-

. At submerge dsampl e locations , sedimen t sample s wer e collecte dusin g 1.5-inch diamete r acetat e (o r simila r material ) macrocor e liners

. Th e acetat e line r wa s manuall y pushe dint o th e sediment s t o adepth
o f up t o si x inches

. Onc e th e line r wa s pushe dt o maximu mpenetration , th e en do f th e line r that wa s no t i n th e sediment s wa s covere dwithaglove dhan dt o preven t th e los s o f

th e sample , an dth e line r wa s withdraw n fromth e botto mo f th e brook

. Surfac e wate r wa s draine doff

, an dth e content s o f

th e line r wer e emptie dint o astainles s stee l bow l an dhomogenized

. Th e homogenize dsediment s were the n transferre dint o asampl e jar

. A t non-submerge dsampl e locations , wetlan dsoi l sample s collecte dfrom200 1 t o 200 3 were obtaine d usin g acor e sample r

that wa s manuall y pushe dint o th e ground

. Th e cor e sample r containe daline r

tha t fille dwithsoil s a s th e devic e wa s advance dint o th e ground

. Wetlan dsoi l sample s wer e collecte dfrom th e surfac e t o approximatel y si x inche s belo w groun dsurfac e (bgs)

. Sample s were fransferredt o a stainles s stee l bow l fromth e line r o f th e cor e sampler

. Th e to p portio n o f th e wetlan dsoi l sampl e cor e generall y consiste do f

gras s an droots
. Th e root s wer e shake n t o remov e an y soi l trappe dwithi n the man d adde dt o th e soi l fromth e remainde r o f th e core . Th e root s an dgras s wer e discarde dan dwer e no t include da s part

o f th e sample

. Th e wetlan dsoi l sampl e wa s the n homogenize dan dfransferredt o th e sampl e ja r

usin g astainles s stee l spoon . Fro m199 6 t o 200 0 wetlan dsoi l sample s wer e collecte dusin g stainles s stee l spoons . Sediment/wetlan dsoi l sample s consiste do f discret e samples , collecte dat adepth
o f 0 t o 6 inche s belo w th e groun do r sedimen t surface

. Stainles s stee l bowl s an dspoon s wer e decontaminate dbetwee n sampl e location s i n accordanc e withth e SAP

. Acetat e macrocor e an dcor e sampler liner s wer e dispose do f

afte r eac hsampl e wa s collected

.

WOODARD & CURRA N (212004.01 ) Pag e 1 0 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

2. 4 COMPOSITIO N O FSEDIMENTAVETLAN D SOIL S Th e majorit

y o f th e sediment/wetlan dsoi l sample s collecte ddurin g th e 200 4 samplin g effor t consiste do f clay often overlai n b y several inche s o f organics

. A smal l numbe r o f sample s als o ha dsilt , san dan d grave l mixe di n withth e clay

. Th e percen t solid s conten t

o f th e sediment/wetlan dsoi l sample s range d from3 5 percen t

at 801 2 t o 7 7 percen t

a t 8015

.

WOODARD&CURRA N (212004.01 ) Pag e 1 1 12/02/200 4 DRAFT SE D RP T 200 4

# SECTIO N 3DRAF T

3

. SEDIMENTAVETLAN D SOI LANALYTICA LMETHOD S AN D RESULT S
Thi s sectio n describe s sediment/wetlan dsoi l analytical methods , an dsummarize s th e analytical results

.
3. 1 SEDIMENTAVETLAN D SOI LANALYTICA LMETHOD S Al l sediment/wetlan dsoi l sample s were analyze dfo r PCB s usin g USEP A Metho d808 2 at Sever n Tren t Laboratorie s i n Buffalo , Ne w York

. Laboratory analytical level s wer e consisten t withUSEP A Leve l W requirements

. Sampl e analysi s fo r PCB s include dth e followin g Arochlors : Arochlo r 1016 , 1221 , 1232 , 1242 , 124 8 125 4 an d1260

. Th e calibratio n level s use dfor Arochlor s 101 6 an d126 0 were 0.025 , 0.05 , 0.10 , 0.25 , 0.50 , 1.0 , an d2. 5 ppm . A singl e poin t

calibratio n standardwa s use dfor al l othe r Arochlors

. Mos t

sample s ha dPC B concenfration s that

wer e eithe r

non-detec t

o r wer e withi n th e calibratio n rang e use dfo r th e associate d instrumentation

. However , dilution s were performe dfor 3018.200 4 (fifty-fol ddilution ) an d8004.200 4 (fifty-fol ddilution ) t o brin g sampl e concenfration s withi n th e calibratio n range .
3. 2 SEDIMENTAVETLAN D SOI LMONITORIN GRESULT S Th e analytica l result s obtaine dfromth e September 1 3 an d14 , 200 4 samplin g effor t are summarize di n Tabl e 3 an dFigure s 1 throug h3

. Th e concenfration s o f

total PCB s fo

r 3 4 o f 3 6 sampl e location s wer e belo w th e actio n leve l o f 5 mg/kg

. PCB s wer e no t

detecte di n sample s collecte dat any o f th e upsfrea

msedimen t

sampl e location s (8001 , 8002A , 8002B)

. PCB s exceede dth e actio n leve l a t tw o sampl e location s adjacent t o th e Site (301 8 a

t 1 8 mg/k g an d800 4 at

8. 2 mg/kg)

. Withth e exceptio n o f thos e tw o samples , th e concenfration s o f total PCB s i n sampl e location s adjacent t o th e Site (800 3 t o 8017 , supplementa l gri dsampl e location s an d 3018 , 8039 ) range dfrom < 0.02 1 t o 2. 1 mg/kg

. PCB s wer e no t detecte di n 8 o f

th e 2 7 sample s collecte d fromthi s area . Concenfration s o f PCB s at th e downsfrea

mlocation s (801 8 - 8023) , range dfrom < 0.02 5 t o 0.04 8 mg/kg

.

WOODARD&CURRA N (212004.01 ) Pag e 1 2 12/02/200 4 DRAF T SE D RP T 200 4TABL E 3 : DRAF T

200 3 RIGG S BROO K SEDIMENT/WETLAN D SOI LMONITORIN GSAMPL E RESULT S

,^ 1 Samp'le.I D i \i \
3018.200 4 8001.200 4 8002A.200 4 8002B.200 4 8003.200 4 8004.200 4 8005.200 4 8006.200 4 8007.2004/8007.2004.5 1 8008.200 4 8009.200 4 8010.200 4 8011.200 4 8012.200 4 8013.200 4 8039.200 4 8014.200 4 8015.200 4 8016.200 4 8017.2004/8017.2004.5 1 8018.200 4 8019.200 4 8020.200 4 8021.200 4 8022.200 4 8023.200 4 9A925.200 4 9B925.200 4 9B000.200 4 9C925.200 4 9C000.200 4 9C025.200 4 9C050.200 4 9C075.200 4 9 C 100.200 4 9C125.200 4 .^^Total PC B Concentratio n T ^A' / ' S ^(mg/Tcg

) > ^ )

. 1 8 <0.02 8 <0.0 4 <0.02 7 <0.02 5 8. 2 0.02 4 J 0.5 9 0.4 8 J/0.4 8 J <0.02 4 0.2 2 <0.02 4 <0.02 3 0.5 7 J <0.02 2 <0.02 7 0.4 3 <0.02 1 <0.02 4 0.067/0.04 7 J 0.03 4 J 0.03 7 J 0.02 1 J 0.03 2 J 0.04 8 <0.02 5 0.6 8 J 0.2 7 1. 4 J 0. 3 J 0.7 9 J 0.05 8 J 0.5 9 J 0. 2 J 2. 1 0.6 3 J *

' * SamplelLocatio n " Adjacen t t o 0 Conno r

Site Upsfrea mo f O'Conno r

Site Upsfrea mo f O'Conno r

Site Upstreamo f

O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

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Site Adjacent t o O'Conno r

Site Adjacent t o O'Conno r

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Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacent t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacent t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

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mo f O'Conno r

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mo f O'Conno r

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mo f O'Conno r

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mo f O'Conno r

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O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacent t o O'Conno r

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Site Adjacen t t o O'Conno r

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Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Notes : Duplicat e sample s are identifie dwit h.5 1 suffix

. J Qualifier

indicate s th e sampl e concentratio n i s estimated

.

WOODAR D & CURRA

N (212004.01 ) DRAF T SE D RP T 200 4 Pag e 1 3 12/02/200 4DRAF T

3. 3 SEDIMENT/WETLAN D SOI LQUALIT Y CONTRO LRESULT S Th e concenfration s o f

PCB s obtaine ddurin g th e 200 4 Rigg s Broo k Sediment/Wetlan dSoi l samplin g at Rigg s Broo k

wer e validate dt o determin e th e quality an dusability o f th e data

. A USEP A Tie r II I dat a validatio n procedur e wa s used

. Th e Tie r II I validatio n include s acompletenes s check , arevie w o f al l quality confro l result s a s wel l a s arevie w o f al l ra w data

. Reference s use dt o complet e th e validatio n proces s includ e th e USEP A Regio n I Functiona l Guideline s fo r Evaluatin g Organi c Analyse s (USEPA , modifie d1988) , th e SCRA QAP P (W&C , 1996 ) an dth e Rigg s Broo k SAP (W&C , 1997)

. Validatio n result s an ddat aquality assessment s were base do n th e performanc e demonsfrate di n th e analyse s o f quality confro l samples

. Sampl e qualifier s an dflag s wer e applie dbase do n thes e results

. Thi s sectio n include s a

n evaluatio n o f

quality confro l elements , asummar y o f quality confro l sampl e results , an da n evaluatio n o f

precision , accuracy , representativeness , completenes s an dcomparability (PARCC)

.
3.3. 1 EVALUATIO N O FQUALIT Y CONTRO LELEMENT S Quality contro l element s include di n th e Tie r II I validatio n an ddat aassessmen t wer e dat acompleteness , holdin g times , metho dblanks , surrogat e recoveries , equipmen t an dfieldblanks , calibratio n results , matri x spikes , laboratory contro l sample s an dduplicat e samples

. 3.3.1. 1 DAT A COMPLETENES S Th e dat apackag e fromSever n Tren t Laboratories , Inc. , Buffalo , NY , wa s reviewe dt o ensur e that al l sampl e an dassociate dquality assuranc e result s were available

. Sample s collecte di n associatio n withth e 200 4 sediment/wetlan dsoi l samplin g effor t wer e analyze di n sampl e delivery grou p (SDG ) A04-8844

. Result s o f

th e completenes s revie w indicat e tha t al l collecte dsample s wer e analyze dand , withon e exception , al l quality confro l result s wer e availabl e t o complet e dat avalidatio n procedures

. Percen t difference s (%Ds ) betwee n positiv e detection s obtaine dfromtw o dissimilar G C column s wer e no t include di n th e dat apackage

. Th e %D s are use dt o evaluat e th e accurac y o f reporte ddetection s and , fo r thi s dat aset , th e %D s wer e manuall y calculate dfromth e ra w dat adurin g validation

. Dat avalidatio n result s were use dt o asses s th e overal l quality o f reporte dPC B concenfrations

. 3.3.1. 2 METHO D BLANK S Metho dblank s wer e analyze dt o determin e i f concenfration s o f

PCB s were infroduce dat th e laboratory durin g th e preparatio n an danalysi s o f th e samples

. Metho dblank s consiste do f analyt e free soil , whic h
wa s exfracte dan dprocesse di n a n identical maime r

t o th e sediment/wetlan dsoi l samples

. Ther e wer e n o detection s o f

PCB s i n an y o f

th e metho dblank s associate dwithsediment/wetlan dsoi l sample s collecte d

WOODARD&CURRA N (212004.01 ) Pag e 1 4 12/02/200 4 DRAFT SE D RPT 200 4DRAF T

durin g th e 200 4 samplin g event , indicatin g that laboratory contaminatio n o f PCB s int o sedimen t

sample s di dno t likel y occur . 3.3.1. 3 SURROGAT E RECOVERIE S Tw o surrogates , decachlorobipheny l (DCB ) an dtefrachlorometaxylen e (TCMX) , wer e adde dt o eac h sampl e prio r

t o exfractio n t o monito r

sampl e matri x effect s an dt o determin e i f th e instrumentatio n use dt o obtai n PC B concenfration s wa s responsiv e an dfunctionin g correctly

. A know n concenfratio n o f eac h surrogat e wa s adde dt o eac hsampl e prio r t o sampl e exfractio n an danalysis

. Th e reporte dconcenfratio n o f eac hsurrogat e wa s divide db y th e know n concenfratio n t o obtai n apercen t recovery . Th e percen t recoverie s obtaine dfromth e sampl e analyse s were compare dt o advisory limit s establishe dfo r USEP A Metho d8082

. Th e USEP A advisory limit s fo r th e surrogat e recoverie s wer e statisticall y derive dat th e analytica l laboratory

. Th e advisory limi t for acceptabl e DC B recoverie s wa s 36-153%

. Fo r TCMX, th e advisory limit s wer e 32-148%

. Th e recoverie s o f bot hsurrogate s were withi n th e advisory limit s for al l sample s analyze dwithou t significan t

dilutions

. Surrogat e recoverie s wer e dilute dout , an dtherefore no t evaluated , fo

r th e followin g sample s that require ddilution s at

th e instrument : 3018.200 4 (fifty-fol d dilution ) an d8004.200 4 (fifty-fol ddilution)

. Surrogate recoverie s were reporte donl y fromth e column use dt o obtai n reporte dsampl e concenfrations

. Overall , th e surrogat e recovery dat aindicat e that matri x interferenc e wa s no t

eviden t an dth e analytica l instrumentatio n wa s functionin g properly

. 3.3.1. 4 EQUIPMEN T AN D FIEL D BLANK S Tw o equipmen t

blanks , EB.100.200 4 an dEB.101.2004 , wer e collecte dan danalyze di n associatio n with sedimen t samplin g activitie s t o measur e th e effectivenes s o f decontaminatio n procedure s i n th e remova l
o f targe t compounds

. Distille dwate r wa s poure dinto adecontaminate dstainles s stee l bow l an dspoo n that wer e use di n th e homogenizatio n o f th e sedimen t

samples

. Th e distille dwate r wa s poure dfromth e bowl s int o sampl e containers

. Ther e wer e n o PCB s detecte di n th e equipmen t blanks , indicatin g that decontaminatio n procedure s wer e effectiv e in th e removal o f potentia l contamination

. On e fieldblan k

(FB

. 100.2004 ) wa s collecte dan danalyze dt o determin e PC B concenfration s i n th e sourc e wate r use dfor decontaminatio n o f

th e sedimen t

samplin g equipment

. Dat afromth e fieldblan k analysi s wer e use dt o examin e th e potentia l for contaminatio n o f

th e samplin g equipment , an dultimatel y o f th e sedimen t samples , fromth e sourc e water
. Th e sourc e wate r use da s afinal rinse t o decontaminat e th e sedimen t samplin g equipmen t

wa s commerciall y purchase ddistille dwater
. N o PCB s wer e detecte di n th e fieldblan k

indicatin g that

th e sourc e wate r

wa s no t likel y apotentia l contaminatio n sourc e for sedimen t samples

.

WOODARD&CURRA N (212004.01 ) Pag e 1 5 • 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

3.3.1. 5 CALIBRATIO N RESULT S Calibratio n result s wer e reviewe dt o determin e i f sampl e result s wer e accuratel y quantified

. Tw o type s o f calibration s wer e include di n th e review : initial calibration s an dcontinuin g calibrations

. Initial calibration s were evaluate dbase do n instrumen t response s t o different

concenfration s o f

standard s o f th e targe t

Arochlors

. Instrumen t

response s wer e plotte dagains t th e concentration s o f

seve n standard s t o obtai n acalibratio n curv e fromwhic hal l sampl e concenfration s were obtained

. Th e concenfration s o f th e standard s use dt o creat e th e calibratio n curve s for Arochlo r 101 6 an dArochlo r

126 0 were 0.025 , 0.05 , 0.10 , 0.25 , 0.50 , 1.0 , an d2. 5 ppm . Th e correlatio n coefficient provide dameasur e o f

th e linearity o f

th e calibratio n curve . Th e initial calibratio n requiremen t specifie di n th e SCRA QAP P wa s fo r th e correlatio n coefficient

t o b e 0.9 9 o r

better

. Initial calibration s fo

r Arochlo r 101 6 an dArochlo r

126 0 wer e create do n Augus t 20 , 2004 , fo

r th e A an d B charmel s o f

th e ga s chromatograph

. Singl e poin t initia l calibration s were utilize dfo r quantificatio n o f Arochlor s 1221 , 1232 , 1242 , 1248 , an d1254

. Al l singl e poin t initia l calibration s wer e analyze do n Augus t 20 , 2004 , for

bothchannel s o f

th e ga s chromatograph

. Initial calibratio n result s were acceptabl e for al l Arochlo r

peak s o n bothcharmel s indicatin g that sampl e concenfration s were accuratel y quantified

. Continuin g calibratio n result s wer e analyze dt o provid e achec k o f th e accurac y o f

th e analytica l instrumentation

. Continuin g calibratio n result s were assesse db y comparin g reporte dconcenfration s agains t tru e concenfration s o f

astandard

. Th e SCRA QAP P requiremen t fo r acceptanc e o f

continuin g calibratio n result s wa s apercen t differenc e o f

15.0 % o r

les s betwee n th e reporte dconcenfratio n an dth e tru e concenfration

. Continuin g calibratio n standard s were analyze do n Septembe r 21 , 2004

. Withth e exceptio n o f on e continuin g calibratio n standar d(9/21/0 4 14:18) , continuin g calibratio n result s associate dwithth e 200 4 sedimen t sampl e analyse s wer e withi n confro l limits , indicatin g accurat e sampl e quantificatio n fo r al l analytes

. Fo r

th e continuin g calibratio n standar danalyze d9/21/0 4 at 14:18 , th e percen t

differenc e fo

r Arochlo r 126 0 (15.2% ) fo

r on e column (Channe l A ) wa s greate r than th e confro l limi t

o f 15.0%

. Sampl e result s were reporte dunqualifie dbecaus e al l Arochlor s wer e reporte dfromth e B channe l whic hwa s demonsfrate dt o b e i n confrol

. 3.3.1. 6 MATRI X SPIK E SAMPLE S Matri x spike an dmatri x spike duplicat e (MS/MSD ) sample s wer e use dt o determin e i f matri x interference s affecte dth e recovery o f PC B concenfration s i n samples

. Fo r example , certai n type s o f soi l

WOODAR D & CURRA N(212004.01 ) Pag e 1 6 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

suc ha s peat

absor b molecule s o f

organi c compound s suc ha s PCB s ver y tightly , makin g i t

difficul t t o exfrac t th e organi c compound s fromth e soil

. Fo r mafrix spike analyses , know n concenfration s o f Arochlo r 125 4 wer e adde dt o sedimen t sample s before exfractio n an danalysis

. Th e concenfration s o f th e Arochlo r obtaine dfromth e analyse s wer e divide db y th e know n concenfration s t o obtai n percen t recoveries

. Th e criteri ause din th e determinatio n o f mafrix effect s are obtaine dfromperformanc e dat a generate dfromth e analysi s o f quality contro l samples

. Fo r Arochlo r

1254 , th e acceptanc e rang e for mafrix spike recoverie s wa s 52-153%

. Durin g th e 200 4 sedimen t samplin g event , mafrix spike sample s wer e collecte dat

8006.200 4 an d8013.2004

. Th e MS/MS D sample s wer e designate dwit ha.5 2 a s apart o f th e sampl e identificatio n t o differentiate the mfromth e origina l samples

. MS/MS D recoverie s o f Arochlo r 125 4 wer e withi n th e acceptanc e rang e fo r bothset s o f

MS/MS D analyses

. 

### 3.3.1. 7 LABORATOR Y CONTRO L SAMPLE S Laboratory confro l sample s wer e use dt o determin e th e accurac y o f th e analj^ical metho duse dt o obtai n sampl e concenfrations

. Laboratory confro l sample s consis t o f analyte-fre e soi l t o whic hknow n concenfration s o f

Arochlo r 125 4 wer e added

. Th e reporte dconcenfration s wer e divide db y th e know n concenfration s t o obtai n percen t recoveries

. Laboratory confro l sampl e recoverie s were compare dt o statisticall y derive dacceptanc e limits

. Th e acceptanc e limit s wer e 52-153 % fo r Arochlo r

125 4 in th e LC S analysis

. Al l laboratory confro l sampl e recoverie s wer e withi n confro l limits , indicatin g that th e analytical accurac y demonsfrate ddurin g sampl e analysi s wa s acceptable

. 3.3.1. 8 FIEL D DUPLICAT E SAMPLE S Duplicat e sample s ar e tw o different sample s collecte dfroma n identica l location

. Th e purpos e o f collectin g duplicat e sample s wa s t o measur e th e precisio n o f th e reporte dPC B concenfrations

. Precisio n i s expresse di n term s o f relativ e percen t

differenc e (RPD)

. Th e RP D wa s calculate db y takin g th e differenc e betwee n th e sampl e an dit s duplicat e an ddividin g i t b y th e averag e o f

thes e results

. Evaluatio n o f th e RP D wa s use dt o determin e i f there wa s variability i n sampl e collectio n an danalysi s an dt o

a determin e whethe r

th e concenfration s o f th e targe t

compound s wer e homogeneousl y distribute d throughou t

th e sampl e matrix

. Duplicat e concenfration s wer e considere dt o b e i n agreemen t (compar e well ) i f th e RP D betwee n PC B concenfration s wa s les s tha n 50 % (USEPA , 1988)

. Duplicat e sediment/wetlan dsoi l sample s wer e designate dwitha.5 1 suffi x a s part o f th e sampl e identificatio n t o differentiate the mfromothe r sedimen t samples

.

WOODARD&CURRA N (212004.01 ) Pag e 1 7 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

Duplicat e sample s were collecte dat 8007.200 4 an d8017.200 4 durin g th e 200 4 Rigg s Broo k sediment/wetlan dsoil-samplin g event
. Th e RPD s betwee n th e concenfration s o f targe t Arochlor s fo

r th e duplicate s an dcorrespondin g sample s were belo w 50%

. Th e duplicat e dat asugges t that a n acceptabl e leve l o f precisio n wa s achieve ddurin g sampl e collectio n an danalysis

. 3.3.1. 9 SAMPL E QUANTIFICATIO N Positiv e concenfration s o f Arochlor s were confirme db y analysi s o n tw o dissimilar ga s chromatographi c columns

. Result s fromCharme l A an dChanne l B were compare dt o evaluat e th e precisio n betwee n th e tw o columns

. Th e relativ e percen t differenc e (RPD ) betwee n result s wa s calculate dfo r eac hpositiv e Arochlo r detection , an dreporte dconcenfration s fo r whic hth e % D betwee n column s wa s greate r than 25 % hav e bee n qualifie da s estimate d(J)

. Base do n %D s greate r than 25% , th e followin g sampl e result s for Arochlo r 124 8 hav e bee n qualifie da s estimate d(J) : 8018.2004 , 8019.2004 , 8020.2004 , 8021.2004 , 9C000.2004 , an d9C075.2004

. Base do n %D s greate r tha n 25% , th e followin g sampl e result s fo r Arochlo r 125 4 hav e bee n qualifie da s estimate d(J) : 8007.2004 , 8007.2004.51 , 8017.2004.51 , 9A925.2004 , 9B000.2004 , 9C025.2004 , 9C050.2004 , 9C125.2004 , an d9C925.2004

. Base do n %D s greate r tha n 25%) , th e followin g sampl e result s fo r Arochlo r 126 0 hav e bee n qualifie da s estimate d(J) : 8005.2004 , 8012.2004 , 8018.2004 , 8019.2004 , an d8021.2004

. Th e laboratory reporte dal l positiv e detection s fro mth e B channe l regardles s o f th e relativ e concenfration s obtaine do n th e tw o channels

. Th e highe r o f tw o result s wa s reporte dfor mos t o f th e positiv e detections

. Th e lowe r resul t wa s reporte dfor

th e following : Arochlo r 124 8 in sample s 8006.200 4 an d9C075.2004 ; Arochlo r 125 4 i n sample s 8007.2004 , 8007.2004.51 , 8017.2004 , 8017.2004.51 , 8022.2004 , 9A925.2004 , 9B000.2004 , 9B925.2004 , 9C025.2004 , 9C050.2004 , 9C125.200 4 an d9C925.2004 ; an dArochlo r 126 0 i n sampl e 8007.2004.51

.
3.3. 2 SUMMAR Y O FQUALIT Y CONTRO LSAMPL E RESULT S A Tie r II I validatio n revie w wa s complete dfor al l sediment/wetlan dsoi l sample s collecte dfromRigg s Broo k i n 2004

. A revie w o f al l result s an dquality confro l element s indicate dthat base do n th e deliverable s requeste dfromth e laboratory th e dat apackag e wa s on e hundre dpercen t complet e for

th e sediment/wetlan dsoi l sample s collecte dan dal l associate dquality confro l results

. Al l o f th e blank s (method , equipment , an dfield) wer e non-detec t for PCB s indicatin g that

contaminatio n o f

sample s from outsid e source s di dno t

likel y occur . Surrogat e compoun drecoverie s wer e withi n acceptanc e limit s fo r al l sample s suggestin g that

matri x interference s wer e no t eviden t an dth e analytica l syste mwa s i n confrol

. Recoverie s o f

laboratory confro l sample s bracketin g th e sedimen t sample s wer e i n confro l fo r Arochlo r

WOODAR D & CURRA N (212004.01 ) Pag e 1 8 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

125 4 indicatin g that

sampl e concenfration s were accuratel y reported

. Tw o samples , 8006.200 4 an d 8013.2004 , wer e analyze dfo r matri x effect s usin g matri x spike s o f Arochlo r 1254

. Mafrix spike result s for bothsample s wer e acceptable

. Al l initial calibration s wer e i n criteri aindicatin g that satisfactory calibratio n curve s fromwhic haccurat e sampl e concenfration s coul db e obtaine dwer e generated

. Al l continuin g calibratio n result s associate d withreporte dsampl e concenfration s were withi n confro l limit s indicatin g that accurat e quantification s fo r al l Arochlor s coul db e achieved

. Duplicat e sample s were collecte dat 8007.200 4 an d8017.2004

. Th e result s fo r th e tw o duplicat e pair s wer e withi n contro l limit s indicatin g that th e leve l o f

precisio n wa s acceptable

. 3.3. 3 EVALUATIO N O FPARC C PARAMETER S Quality confro l result s obtaine ddurin g th e 200 4 Rigg s Broo k Sediment/Wetlan dSoi l Samplin g event wer e als o reviewe dt o determin e i f PARC C objective s wer e met , a s outline di n th e SAP

. Component s use dt o complet e th e PARC C assessmen t were obtaine dfromth e Tie r II I validatio n review

. PARC C result s are summarize dbelow

. 3.3.3. 1 PRECISIO N Precisio n wa s expresse di n term s o f RP D betwee n sample s an dassociate dduplicates , an dbetwee n M S
an dMS D results

. Th e precisio n requiremen t specifie di n th e SA P for th e RP D betwee n bothpair s o f thes e quality confro l sample s i s 50 % o r less

. Duplicat e sample s were collecte da t 8007.200 4 an d8017.2004

. RPD s betwee n sampl e an dfieldduplicat e result s were withi n confro l limit s fo r bothset s o f

sampl e duplicate s for

al l Arochlors

. Tw o pair s o f

MS/MS D samples , 8006.200 4 an d8013.2004 , were analyze di n associatio n wit hth e 200 4 Rigg s Broo k

Sediment/Wetlan dSoi l samples

. Th e RPD s betwee n M S an dMS D recoverie s o f Arochlo r 125 4 were belo w 50 % fo

r bothpair s o f

samples

. Base do n th e result s o f

mafri x spike an dduplicat e analysis , th e level s o f samplin g an danalytica l precisio n ar e acceptable

.

WOODARD&CURRA N (212004.01 ) Pag e 1 9 12/02/200 4 DRAF T SE D RPT 200 4DRAF T

3.3.3. 2 ACCURAC Y Accurac y i s ameasur e o f agreemen t

betwee n result s obtaine dfroma n analytical metho dcompare dwith know n values

. Accurac y o f th e sediment/wetlan dsoi l concenfration s wa s evaluate dthroug harevie w o f laboratory confro l sampl e results

. Laboratory contro l sample s are soil s that are spike dwit

hknow n concentration s o f Arochlo r 1254

. Th e soil s hav e bee n previousl y analyze dan dare know n t o b e free o f PC B contaminatio n prio r t o additio n o f th e spike

. Th e reporte dconcenfration s o f Arochlo r 125 4 wer e divide db y th e know n concentration s t o obtai n percen t

recoveries

. Th e percen t recoverie s o f

th e laboratory confro l sample s wer e compare d agains t th e recovery criteri aspecifie din th e SAP

. All recoverie s were i n criteri aindicatin g that sampl e concentration s wer e accuratel y quantified

. 3.3.3. 3 REPRESENTATIVENES S Representativenes s expresse s th e degre e t o whic hdat aaccuratel y an dprecisel y represen t acharacteristi c o f th e population , paramete r variation , or

environmenta l condition

. Representativenes s i s confrolle d throug hmeasuremen t

o f precisio n an daccurac y an dcomparin g th e result s versu s projec t objectives

. Method s t o evaluat e precisio n an daccuracy , a s describe dpreviously , hav e indicate dthat th e dat aare representative

. A consisten t metho do f

sampl e collectio n an dhomogenizatio n ha s assure dthat representativ e sample s wer e collected

. Th e comparability data , describe di n th e las t subsectio n o f

th e PARC C discussion , demonsfrate th e consistenc y o f th e sampl e collectio n method s an dtherefore , als o demonsfrate that

reporte dPC B concenfration s are representative

. 3.3.3. 4 COMPLETENES S Completenes s i s ameasur e o f th e amoun t

o f vali ddat aobtaine dfrom ameasuremen t syste mcompare dt o th e amoun t

expected

. Th e completenes s goal fo r th e projec t

a s require db y th e QAP P i s 90%

. On e hundre dpercen t

o f th e dat awer e validate dan daccepte dindicatin g that th e dat ase t

i s complet e for sample s collecte ddurin g thi s investigation

. 3.3.3. 5 COMPARABILIT Y Comparability i s aqualitativ e an dquantitativ e assessmen t o f ho w different

dat aset s can b e compare dt o eac hother

. Fo r

th e sediment/wetlan dsoil s collecte dat Rigg s Brook , comparability wa s measure db y analysi s o f

th e duplicat e results

. Th e duplicat e result s wer e use dt o asses s th e variability o f PC B concenfration s i n th e sediment/wetlan dsoi l samples

. Variability may b e du e t o samplin g and/o r analytica l technique s o r

heterogeneity o f

PC B concenfration s throughou t th e sampl e matrix

. A s state d

WOODARD&CURRA N (212004.01 ) Pag e 2 0 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

above , th e RP D betwee n sampl e an dduplicat e concenfration s wa s require dt o b e 50 % o r less

. Th e result s fromanalysi s o f

al l pair s o f

duplicate s me t

criteri aindicatin g that

th e comparability an dconsistenc y o f th e reporte dresult s wa s satisfactory

.

WOODARD & CURRA N (212004.01 ) Pag e 2 1 12/02/200 4 DRAF T SE D RP T 200 4

# SECTIO N 4DRAF T

4

. SUMMAR Y O F200 4 SEDIMENT/WETLAN D SOI LANALYTICA LRESULT S
Thi s sectio n compare s 200 4 sedimen t analytica l dat at o th e targe t leve l o f 5 mg/k g tota l PCBs , an dt o PC B concenfration s reporte dfro mth e 199 6 throug h200 3 sediment/wetlan dsoi l sampl e collectio n events
. 4. 1 COMPARISO N O F200 4 SEDIMENT/WETLAN D SOI LANALYTICA LRESULT S T O TARGE T LEVE L A tota l o f

3 6 sediment/wetlan dsoi l sample s wer e collecte ddurin g 200 4 samplin g activities

. Concenfration s o f

total PCB s fo

r 3 4 o f 3 6 sedimen t

sample s wer e belo w th e targe t leve l o f 5 mg/kg

. Concenfration s o f

total PCB s exceede dth e targe t leve l at sampl e location s 301 8 (1 8 mg/kg ) an d800 4 (8. 2 mg/kg)

. 4. 2 COMPARISO N O F200 4 SEDIMENT/WETLAN D SOI LANALYTICA LRESULT S T O PREVIOU S

SEDIMENT/WETLAN D SOI LDAT A Tabl e 4 provide s acompariso n o f analytica l result s o f

th e 2004-sediment/wetlan dsoi l sample s t o analytica l result s obtaine dfromsample s collecte dfrom199 6 throug h200 3 a t th e sam e locations

. Sampl e location s identifie din th e 198 7 E.C

. Jorda n R I were slighti y different tha n location s outiine di n th e SAP , therefore th e dat aobtaine dfromthi s investigatio n were no t directl y compare dt o th e 200 4 data

. Analytica l result s fromth e 198 7 R I ar e locate di n Appendi x B

.
4. 3 MANN-KENDAL LSTATISTICA LTREN D TES T A s require din th e SAP , aMann-Kendal l statistical frendanalysi s wa s complete dt o determin e i f total PC B concenfration s were increasin g o r decreasin g at

sampl e location s withat leas t fou r year s o f data

. Sufficient dat awere availabl e t o complet e thi s tes t at 3 6 samplin g locations

. Dat awa s collecte dfo r thes e location s from199 6 throug h2004

. Th e ChemStat program(Versio n 5.0) , whic hha s statistical software includin g th e Mann-Kendal l test , wa s use dt o complet e th e analysis

. Th e result s fromth e Mann-Kendal l tes t are include di n Appendi x C

. A revie w o f

th e result s o f

th e Mann-Kendal l frendtes t indicate , witha95 % confidenc e interval , that thre e sample s ou t

o f 3 6 showe dfrends. Result s o f th e Mann-Kendal l analysi s are include di n Appendi x C

. Tw o sampl e location s (800 6 an d9C075 ) showe ddownwar dfrends an don e sampl e locatio n (9A925 ) showe da n upwar dfrend. A t

sampl e locatio n 8006 , PC B concenfration s increase dfrom0.7 7 mg/k g i n 199 6 t o approximatel y 1 6 mg/k g i n 1998 , an dthe n hav e steadil y decrease dt o 0.5 9 mg/k g in 2004

. A t sampl e locatio n 9C075 , PC B concenfration s hav e decrease dfrom11. 2 mg/k g i n 200 0 t o 0. 2 mg/k g i n 2004

. A t sampl e locatio n 9A925 , th e locatio n wher e Mann-Kendal l showe dan upwar dfrend, th e PC B concenfratio n wa s 0.08 6 mg/kg i n 200 1 an dfrom2002-2004 , PC B concenfration s hav e range dfrom0.6 5

WOODARD&CURRA N (212004.01 ) Pag e 2 2 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

t o 0.6 8 mg/kg , showin g onl y aminute increase , an dal l concenfration s les s than 1 mg/kg

. Th e result s o f th e Mann-Kendal l tes t

showe ddownwar dfrends at several othe r

sampl e location s (8001 , 8002B , 8003 , 8005 , 8011 , 8015 , 8016 , 8020 , 8021)

. However , PC B concenfration s a t thes e sampl e location s hav e bee n non-detec t

ahig hpercentag e o f

th e time , an dtherefore th e tes t i s showin g afrendbase do n decreasin g detectio n limits

. Therefore , th e Mann-Kendal l tes t show s that

there ar e n o statisticall y significant frends
at th e remainin g 3 3 sampl e locations

. I n addition , several sampl e location s includin g 8001 , 8002A , 8002 B an d801 5 hav e consistentl y hadnon-detec t result s fo

r all sampl e years . Fo r

man y location s suc h
a s 8003 , 8005 , 8010 , 8016 , 8017 , 8021 , 8022 , 802 3 an d803 9 frace concenfration s o f targe t Arochlor s hav e bee n detecte din onl y on e o r tw o years .

WOODAR D & CURRA N (212004.01 ) Pag e 2 3 12/02/200 4 DRAF T SE D RP T 200 4

### DRAF T

TABL E 4 : COMPARISO N O F

### 200 4 SEDIMENT/WETLAN D SOI LMONITORIN GRESULT S T O HISTORICA LRESULT S 

## fs^ W tessKf — ..JftoTalfPGB ^ 'a)^^(iTi|/kg)fcjgf

e 

## mrmmm i feotatfeCBs; ^v;«!^«i , •••.-••• • ••" • g^(Tng/kg)a > 4?Trr ^ riHiWrf! ' :-yf^^'i ^



### iZf e , ..'ib;-'>,'^
- s^TdtaliPCBs f 800 1 <0.02 8 <0.03 2 <0.02 8 J <0.02 9 <0.031/<0.03 1 <0.0 7 < 0.09 2 J <.073 <.06 6 800 2 N S N S N S N S N S N S N S N S <.06 3 8002 A <0.0 4 <0.03 9 <0.02 6 J <0.02 8 < 0.022 < 0.06 3 < 0.07 9 <.04 6 N S 8002 B <0.02 7 <0.037/<0.03 5 <0.02 5 J <0.0 3 < 0.03 5 < 0.06 3 < 0.05 0 <.06 3 N S 800 3 <0.02 5 <0.03 1 <0.02 7 J <0.02 4 < 0.02 9 < 0.06 6 < 0.06 3 <.0 5 .09 7 J 800 4 8. 2 <0.02 4 J <0.0 2 J <0.02 2 < 0.02 6 < 0.04 2 N S 2 9 2. 8 J 301 8 l i 4. 4 J 5.6 3 J 6.I J 4. 6 3. 9 6. 4 N S 4. 1 J 800 5 0.02 4 J <0.02 7 <0.0 2 J <0.02 2 < 0.024 < 0.04 5 < 0.040 <.046/<.04 6 <.053 800 6 0.5 9 0.95/0.9 3 2. 9 J 0.8 1 J/0.6 6 J 10. 4 14. 0 15.9/16. 8 3. 2 ,7 7 J 800 7 0.4 8 J/0.4 8 J 0.77/0.7 3 0.56 2 0.37 8 J 0.9 8 0.1 4 1. 2 2. 5 ,2 4 J 800 8 <0.02 4 0.03 5 0.03 4 J <0.02 7 < 0.02 7 0.095J/0.146 J < 0.040 <.05 6 .04 7 J 800 9 0.2 2 0.2 0 0.304/0.29 3 0.1 3 J 1. 1 0.15 4 0.340 .9 3 J .27 9 J 801 0 <0.02 4 <0.02 4 <0.0 2 <0.02 1 < 0.024 < 0.047 < 0.040 <.043 .1 1 J 801 1 <0.02 3 <0,02 9 <0.02 5 <0.02 5 < 0.02 6 0.05 3 0.05 3 .03 9 J .04 4 J 801 2 0.5 7 J 0.1 1 0.17 8 <0.02 4 0.14/0.16 8 < 0.05 9 0.53 0 .3 4 J 132 J 801 3 <0.02 2 <0.02 3 <0.01 9 <0.01 9 < 0.02 2 0.05 2 J N S 5. 7 J .4 7 J 803 9 <0.02 7 0.08 8 <0.02 4 <0.02 4 < 0.03 3 < 0.06 1 0.02 9 < 0.05 9 N S 801 4 0.4

3 0.1 7 0.20 6 J 0,23 8 J 1.5 <0,058/<0.05 2 0.430 .03 9 J .043J/.093 J 801 5 <0.02 1 <0.02 4 <0,0 2 <0.02 1 < 0,02 5 < 0.04 5 < 0.04 6 <,09 2 <,04 6 801 6 <0.02 4 0.03 1 <0,02 7 J <0.032 < 0.04 1 < 0.05 8 0,07 1 <.05 3 <,05 6 801 7 0.067/0,04 7 J <0.03 4 <0,0 3 <0.03 1 < 0.03 1 < 0.05 7 0,67 0 <,05 6 <,05 3 801 8 0.03 4 J <0.04 8 0, 2 J 0. 3 J < 0.023 < 0.05 4 < 0.04 3 <,043 <.043 801 9 0.03 7 J <0.04 4 0.39 4 J 0.4 9 J < 0,030 < 0.05 0 0,27 6 ,24 7 J .02 9 J 802 0 0.02 1 J <0,03 2 J 0,07 7 J <0,02 8 <0,028/<0.0 5 < 0.04 4 <0.053/<0.05 3 .23 4 .05 9 J 802 1 0.03 2 J <0.039/<0.03 9 <0,02 9 <0.03 2 < 0,02 6 < 0.05 7 < 0.06 3 ,10 3 J/.0 6 <.06 3 802 2 0,04 8 <0.03 8 0,03 9 J/0.04 2 J <0.02 9 < 0,02 6 < 0,055 < 0.06 3 <.06 3 <.05 9 802 3 <0.02 5 <0.0 3 <0.02 6 <0.025/<0.025 < 0.025 < 0,05 6 < 0.07 9 <.05 9 .0 5 J

WOODAR D & CURRA N (212004.01 ) DRAF T SE D RP T 200 4 Pag e 2 4 12/02/200 4

### DRAF T

^99. 6 

# i^ l 9A92 5 0.6 8 J 0.6 7 0.6 5 J 0.08 6 J N S N S N S N S N S 9B92 5 0.2 7 0.2 1 0.13 5 J 0.27 9 J N S N S N S N S N S 9B00 0 1.

4 J 2. 1 0. 9 0.6 5 J 12. 6 N S N S N S N S 9C92 5 0. 3 J 0.7 7 2.3 2 0.6 8 J N S N S N S N S N S 9C00 0 0.7 9 J 0.6 0 1.9 1 0;32 J 2.0 5 N S N S N S N S 9C02 5 0,05 8 J 0.4 9 0.7 6 J 0,03 5 ,9 9 N S N S N S N S 9C05 0 0.5 9 J 0.3 5 1.4 4 J 0.3 9 J 7. 3 N S N S N S N S 9C07 5 0. 2 J 0.7 8 ,9 4 J 2,3 2 J 11. 2 N S N S N S N S 9C10 0 2. 1 1. 1 1.13 J 0.4 7 J 3. 8 N S N S N S N S 9C12 5 0.6 3 J 1.0 0.7 5 J 0.5 1 J 5. 5 N S N S N S N S NOTES : Secon dconcentratio n liste di s concentratio n o f duplicat e sample

. J Qualifie r

indicate s th e sampl e concentratio n i s estimated

.

WOODAR D & CURRA N (212004.01 ) DRAF T SE D RP T 200 4 Pag e 2 5 12/02/200 4

# SECTIO N 5DRAF T

5

. CONCLUSION S AN D RECOMMENDATION S
A summary o f

th e event s an dresult s associate dwithth e 200 4 Rigg s Broo k Sediment/Wetlan dSoi l Samplin g event s are a s follows : Concentration s o f

total PCB s were belo w th e targe t leve l o f 5 mg/k g a

t 3 4 o f 3 6 (94% ) sediment/wetlan d soi l sampl e locations

. Concenfration s o f total PCB s exceede d5 mg/kg at Rigg s Broo k

sampl e location s 301 8 (1 8 mg/kg ) an d800 4 (8. 2 mg/kg)

. Seve n sampl e location s fromth e supplementa l samplin g gri dadde din 200 0 were agai n sample di n 2004

. Thre e location s (9A925 , 9B92 5 an d9C925 ) adde di n 200 1 wer e agai n sample di n 2004

. Thes e sample s wer e analyze dt o determin e i f ther e wer e frends o f

PC B concentration s ove r tim e sinc e 200 0 an d2001

. Concentration s o f

total PCB s fromal l te n o f thes e location s were belo w th e targe t leve l o f 5 mg/k g an d
wer e simila

r t o concenfration s reporte di n previou s years . Th e Mann-Kendal l statistical frendanalysi s indicate dthat ther e were n o statisticall y significan t frends in PC B concentration s ove r

th e pas t nin e years . Th e quality confro l result s fromdat avalidatio n procedure s indicat e that th e dat aar e o f

goo dquality an d acceptabl e for

thei r en dus e o f

continue dmonitorin g o r PC B concenfration s in Rigg s Broo k near th e O'Conno r Superfun dSite

. Tw o sedimen t

samplin g location s exceede dth e targe t leve l for PCB s o f 5 mg/k g thi s year , 301 8 (1 8 mg/kg ) an d800 4 (8. 2 mg/kg)

. Th e sporadi c exceedance s o f th e targe t leve l o f 5 mg/k g may b e du e t o th e sorptiv e natur e o f

PCBs

. PCB s ar e more likel y t o sor b t o soil/sedimen t

withahig horgani c content
. Du e t o th e heterogeneou s natur e o f sediments , PCB s coul dsporadicall y b e detecte dat concenfration s abov e th e targe t level

. Th e physica l fransport o f PCB s o n soi l particle s withwate r runof f can als o resul t

in redistributio n o f

concenfration s t o area s wher e wate r collect s o r

pools

. Howeve r

sedimen t

sampl e concenfration s d o no t

indicat e that

PCB s hav e migrate dint o Rigg s Broo k sinc e th e completio n o f th e Sourc e Confro l Remedial Actio n in 1997

. Base do n pas t data , PC B concenfration s that sporadicall y excee dth e targe t

leve l hav e no t

bee n show n t o b e relate dt o concenfration s o f PCB s detecte di n biot a collecte dfromRigg s Brook

. In fact , base do n biot asampl e result s for 1987 , 199 7 an d2000 , concenfration s o f

PCB s hav e al l bee n belo w th e targe t leve l o f 2 mg/k g an dhav e generall y decrease d from198 7 t o 2000

. Therefore , base do n these-conclusion s an dth e fact that th e Mann-Kendal l Tren dTes t result s for

200 4 sedimen t

sampl e result s d o no t

indicat e an y significan t

frends, n o remedia l actio n i s recommende dat

thi s time

.

WOODARD&CURRA N (2120004.01 ) Page2 6 12/02/200 4 DRAF T SE D RP T 200 4DRAF T

LIS T O FACRONYM S AND ABBREVIATION S bg s CM P DC B DGP S DQ O ES D KA S mg/k g MS/MS D O U PARC C PCB s pp m belo w groun dsurfac e

Cenfra l Main e Powe r decachlorobipheny l digital geographi c positionin g syste m Dat aQuality Objectiv e Explanatio n o f

Significant

Differenc e Katahdi n Analj^ical Service s milligram s pe r

kilogram mafrix spike/matri x spike duplicat e operationa l uni t Precision , Accuracy , Representative n Polychlorinate dbiphenyl s part s pe r millio n QAP P RO D RP D R I SAP SD G SCR A TCM X USEP A W& C Quality Assuranc e Projec t Plan Recor do f Decisio n Relativ e Percen t

Differenc e Remedial Investigatio n Samplin g an dAnalysi s Plan sampl e delivery grou p Sourc e Confro l Remedia l Actio n tefrachlorometaxylen e Unite dState s Envirormiental Protectio n Agenc y Woodar d& Curran

WOODARD & CURRA N (212004,01 ) DRAF T SE D RP T 200 4 ACRONYM S AN D REFERENCE S 12/02/2004DRAF T

LIS T O FREFERENCE S Jorda n Co. , E.C

. 1987 ; "Draf t Remedial Investigatio n Report F.J

. O'Conno r

Site , Volum e I Technica l Report" ; Decembe r

1987

. U.S

. Environmenta l Protectio n Agency , 1988 ; "Regio n I Functiona l Guideline s for Evaluatin g Organi c Analyses" ; February 1 , 1988 , Modifie dNovembe r 1 , 1988

. U.S

. Environmenta l Protectio n Agency , 1989 ; "Recor do f Decisio n Summary , O'Conno r Compan y Superfun dSite, " Augusta , Maine ; Septembe r 27 , 1989

. Woodar d& Curran , 1996 ; "Sourc e Confro l Remedia l Actio n Quality Assuranc e Projec t Plan, " 100 Percen t Remedial Design , O'Conno r Compan y SuperfiandSite , Augusta , Maine ; Jul y 1996

. Woodar d& Curran , 1997 ; "Fina l Rigg s Broo k Sedimen t

an dBiot aSamplin g an dAnalysi s Plan, " O'Conno r Compan y Superfrin dSite , Augusta , Maine ; Octobe r 1997

.

WOODARD&CURRA N (212004.01 ) ACRONYM S AN D REFERENCE S 12/02/200 4 DRAF T SE D RP T 200 4

# APPENDIX A

### DRAF T

APPENDI X A : SEDIMENT/WETLAN D SOI LSAMPLIN GSURVE Y DAT A

WOODARD&CURRA N (212004.01 ) APPENDICE S 12/03/200 4 DRAF T SE D RP T 200 4DRAF T
RIGG S BROO K

SEDIMEN T SAMPLIN GLOCATION S O'CONNO RCOMPAN Y SUPERFUN D SIT E

AUGUSTA , MAIN E

V , ^ SAMPL E #

800 1 800 2 8002 A 8002 B 800 3 800 4 800 5 800 6 800 7 800 8 800 9 801 0 801 1 801 2 801 3 801 4 801 5 801 6 801 7 801 8 801 9 802 0 802 1 802 2 802 3 803 9 9A92 5 9B00 0 9B92 5 9C00 0 9C02 5 9C05 0 9C07 5 9C10 0 9C12 5 9C92 5 >^ N®RTHIN G 7 » 53538 6 53555 7 53530 0 53447 2 53560 7 53570 7 53570 7 53580 7 53590 7 53580 7 53590 7 53580 7 53590 7 53600 7

, 53590 7 53600 7 53590 7 53600 7 53610 7 53641 6 537693.8 1 53830 2 53862 6 53942 8 54100 4 535919. 5 53584 2 53584 2 53586 0 53586 0 53584 2 53582 5 53580 7 53578 9 53577 2 53587 8 '.f. i V EASTING^"?-; * i 306494 8 306501 6 306486 2 306379 9 306511 8 306511 8 306521 8 306521 8 306521 8 306531 8 306531 8 306541 8 306541 8 306541 8 306551 8 306551 8 306561 8 306561 8 306561 8 306561 2 3065949.8 8 306621 2 306616 4 306675 6 306765 9 306551 8 306530 6 306527 1 306528 9 306525 3 306523 6 306521 8 306520 0 306518 3 306516 5 306527 1 Al l coordinate s i

n NAD-8 3 Main

e West

WOODARD & CURRAN (212004.01 ) DRAF T SE D RP T 200 4 APPENDICE S 12/03/200 4

# APPENDI X B

### DRAF T

APPENDI X B : 198 7 REMEDIA LINVESTIGATIO N RIGG S BROO K SEDIMEN T AN D BIOT A DAT A

WOODARD&CURRA N (212004.01 ) APPENDICE S 12/03/200 4 DRAF T SED RP T 200 4DRAF T
198 7 RIGG S BROO K

SEDIMEN T SAMPL E RESULT S O'CONNO RCOMPAN Y SUPERFUN D SIT E

AUGUSTA , MAIN E

-' ^ V^VSAMPLEID ' - ~ ^Cf i SED- 1 SED- 2 SED-7 B SED- 8 SED- 9 SED-1 0 SED-1 1 SED-1 2 SED-1 3 SED-1 4 SED-1 5 SED- A SED- B SED- C • TOTALPCB ^ ' ; ' '

^ CONCENTRATIO N (mg/kg )

<0.1 2 3. 4 4. 1 <0.1 0 <0.1 0 4. 0 4. 5 1.7 <1. 0 <0.2 5 <0.1 0 4. 2 <1. 0 1 : r

SAMPL E LOCATIO N f { Upsfrea mo f O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Cormo r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Cormo r

Site Downsfrea

mo f O'Conno r

Site Downsfreamo f

O'Conno r

Site Downsfrea

mo f O'Conno r

Site Downsfreamo f

O'Cormo r

Site Adjacen t t o O'Conno r

Site Adjacen t t o O'Conno r

Sit e Adjacen t t o O'Conno r

Site

WOODARD & CURRA N (212004.01 ) DRAFT SE D RP T 200 4 APPENDICE S 12/03/200 4

# 0 [= 3



# ' ]



# c o 

# b 

# 0 

# 0 ^ ^^3 ] 

# o

\ \ \ \

r - \ ^ J <-' ^



# u^
- 

# 1<S ^ ^ 3 f\( ?

UPLAN D

. J _^MAR5H ? C d 0.1 1 0.1 1

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# ....x..-_:. ^ :--- . F ; O'CONNER

. ' SIT E , 

# y.c ^ !' a



# y\.

. STA

BACKGROUND {SE E UDCATIO N INSERT )

C-13(FROG > PC8 T n j C-1 « fTAPPOLES ) PC8 T •n. \ C-1 5 (TADPO-ES ) B < C d C o C r C u F » M l K * P b V 9. t

0.08 8 0.3 5 1. 6 4. 1 92 0 ID O 158 0 1. 3 0.6 1

aBACKGROW O C.2 4 (SnCKlFflAraf^; ) NOTES : 1

. AL L VALUE S N pp m (mg/kg ) 2

. CHEK^XCAL S LBTE D A T BACKGROUN D STADON S rJCLUO E SS^TWSE^TCCTE D ABOV t METHO D DETECTIO N UMTS

. 3

. CHEMTCAL S LISTE D A T OTHER ST.tTION S WCLUO E ONL Y THOS E DETECTE D ABOV E BACKGROUN D STATIO N VALUES

.

^ 

## O 

# 0

••* ^ C-1 » (BUU-HEADS ) PC8 T00 3 C-1 9 (PUMPXHSEEDS) 

# ^4 A

# .:?•

/

' I

. 'i ; Q

PC8 T0.0 4 C-2 0 (G0LD6 H SHHEfiS ) PC8 T0.0 2 C-2 1 f TADPOLES ) PCB T0.1 8 METAL S - SE E BEIXDW

. C-2 2 (BULUHEADS ) METAL S - SE E BELOW

. C-2 3 (GOLDC M S»»gRS ) METAL S - SE E BEU3W

. C.2 1 C- a C-2 3
B « o.oi a C * 85 0 C d N O C o 0.2 0 C « 1. 1 C u 2. 0 F a 42 0 H g 0.02 5 K126 0 M o 20 0 24 0

2. 4 N O Hj30 0 0.6 M 0.1 2 0.9 4 0.9 0 33 0 0.07 2 252 0 62 0
' ^ 0.4 2 0.3 6 O i l 2 6 

## LEGEN D -f-c- ^ MARS H •1^3^' ' BRUS H C ^ TREES

==== = = = DIR T ROA D

PENC E LIN E
: PAVE D ROA D
r ~ ^ STRUCTUR E ^-@f

—STREA M '•'.---I
- POWE R LIN E ) ( CULVER T

• BIOT ASAMPLIN G LOCATIO N N O NO N DETEC T INSIGNIFICAN T I CONCENTRATIO N « BACKGROUN D STATIONS )
^ ^•^,^ar^r. \

COMPOSIT E SAMPL E C:13(FROG ) I D NUMBE R AN D

SAMPL E TYP E 

## < 3

SCAL E l o l.jio O l;0 0 FEET C- a fBLlU^gADS ) PCS T0.5 3 C- 9 (PUMPKXS£EDS > PCB T0.7 4 C-1 0 (dU-LXEADS ) C u i l C-2 S (BUULHEAOS ) PCS r0.5 8 C-2 g P^)^PKHS££DS ) I PC8 T0. U C-T T rTADPOUES ) PCS T 0.4 4



## FIGUR E 8- 1 BIOT ASAMPLIN G STATIO N LOCATION S AM D SAMPLIN G RESULT S SUMMAR Y



## ECJC«RDANC Q

# APPENDIX G

### DRAF T

APPENDI X C : MAN N KENDAL LTREN D ANALYSI S SEDIMEN T SAMPL E RESULT S 1996-200 4

WOODARD&CURRA N (212004.01 ) APPENDICE S 12/03/200 4 DRAF T SE D RP T 200 4Mann-Kendal l Tren d Analysi s Repor t

Company :

Site : Program : Minimu mSize : Reporte dby : Repor t Options : Centra l Main e Ppwe r

O'Conno r

Compan y Superfun dSit e Rigg s Broo k

Sedimen t Monitorin RProgra m 3 elloy d b y samplin g poin t Dat aGroup :

Dat e Range :

Non-detects : Confldenc e Level : Rang e of Censoring : Repor t printed : Sedimen t

1996-200 4

N D replace dwit hD L 0.9 5 0 %

- 100 % 11/10/200 4 Mann-Kendal l Tren dAnalysi s Repor t performe di n ChemSta t v . 5. 0 PCB s Sampl e Locatio n 301 8 800 1 800 2 800 3 800 4 800 5 800 6 800 7 800 8 800 9 801 0 801 1 801 2 801 3 801 4 801 5 801 6 801 7 801 8 801 9 802 0 802 1 802 2 802 3 803 9 8002 A 8002 B 9A92 5 9B00 0 9B92 5 9C00 0 9C02 5 9C05 0 9C07 5 9C10 0 9C12 5 9C92 5 Uni t

mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g mg/k g Siz e

8 1 0 1 9 8 1 0 1 2 1 1 1 0 1 0 9 9 1 0 8 1 1 9 9 1 0 9 9 1 1 1 1 1 0 1 0 8 8 9 4 5 • 4 5 5

. 5 5 5 5 4 %ND s

0. 0 100. 0 100. 0 88. 9 62. 5 90. 0 0. 0 0. 0 50. 0 0. 0 88. 9 55. 6 20. 0 62. 5 18. 2 100. 0 77. 8 70. 0 66. 7 33. 3 63. 6 72. 7 70. 0 90. 0 75. 0 100. 0 100. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 0. 0 Statisticall y Signiflcan t

Tren d N o Ye s N o Ye s N o Ye s Ye s N o N o N o N o Ye s N o N o N o Ye s Ye s N o N o N o Ye s Ye s N o N o N o N o Ye s Ye s N o N o N o N o N o Ye s N o N o N o Directio n

— Downwar d

— Downwar d

— Downwar d Downwar d

—

—

—

— Downwar d

—

—

— Downwar d Downwar d

—

—

— Downwar d Downwar d

—

—

—

— Downwar d Upwar d

—

—

—

—

— Downwar d

—

—

—Centra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Brool < Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 1 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

SIT E DAT E RESUL T TYP E SAMPL E I D PCB' s (mg/kg ) 301 8 301 8 301 8 301 8 301 8 301 8 301 8 301 8 800 1 800, 1 800 1 8001 800 1 8001 800 1 8001 8001 8001 800 2 8002 A 8002 A 80'02 A 8002 A 8002 A 8002 A 8002 A 8002 A 8O62 B 8002 B 8002 B 8002 B 8002 B 8002 B 8002 B 10/23/199 6 09/23/199 8 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2

• 09/11/200 3

• ' 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 •.;;"/;•'•:^i09/66/2000;v;:i;, : 10/10/200 1 ;;:;;;;^;y';:.p9/05/2002.

. 09/11/200 3 y:,y:yl::-::m/02i}o^Z^^ M

' 10/23/199 6 ;|;;;K;;:;^5iiQMti/Jr ^ 09/23/199 8 09/15/199 9 09/06/200 0

• 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/10/199 7 09/23/199 8

- - • 09/15/199 9 - 09/06/200 0

- 10/10/200 1 09/05/200 2 09/11/200 3 Pri m Pri m Pri m

'
- Pri m Pri m Pn m Pn m 'Pri m Pn m Pri m Pn m

- Pn m Pn m Dup l Pri m Pri m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Pri m Pn m Pn m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Pri m 301 8

301 8 301 8 301 8 • • 301 8 3018^ 301 8 301 8 800 1 800 1 , 800 1 800 1 '

. 8001 SOO' I 800 1 800 1 800 1 800 1 800 2 8002 A' 8002 A 8002 A 8002 A 8002 A 8002 A 8002 A 8002 A 8002 B 8002 B 8002 6 8002 B 8002 B 8002 B 8002 B 4.1 J

6. 4 3. 9 -4-. 6 6.1 J 5 63 J 4 4 J 1 8 - < 0 06 6
< 0 07 3
< 0 092 J

' <0'07 0 <0.03 1 <0.03 1 <0.02 9 <0.028 J
< 0 03 2 -^0.02 8 <0.06 3 <d.04 6 <0.07 9 <0.06 3 <0.02 2
< 0 02 8
< 0 026 J <0.03 9 <0.04 0 •<0.06 3 <0.05 0 <0.063 ' <0.03 5 <0.030 ' <0.025 J 0.03 7

Th e followin g qualifier(s ) exist : CL P 0 : J —=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 2 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE
- Soi l

SIT E DAT E RESUL T TYP E SAMPL E I D ' PCB' s (mg/kg ) 8002 B 8002 B 800 3 8003 , 800 3 800 3 800 3 800 3 800 3 800 3 800 3 800 4 800 4 800 4 800 4 800 4 800 4 800 4 • ' 800 4 8do'4 ' - 800 5 '800 5 800 5 800 5 800 5 800 5 800 5 .800 5 800 5 800 6 800 6 ;;80(i)6v:/:•;• • 800 6 :m)6:y:}-
- 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/1999 , 09/06/200 0 10/10/200 1 09/05/200 2

' " Z 09/1'1/200, 3 : 09/13/200 4

. • 10/23/199 6 " .'i ' 10/10/199 7 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7

• ; •^^; : 09/23/199 5 :•:;,;: ; • 09/23/199 8 ;:,:.'• , ,09/15/199 9 •• • J Dup l Pri m Pri m Pri m Pri m Pri m Pn m '^ ' -'

. Pri m ' Pri m Pn m Pn m Pn m Pri m Pri m , Pn m Pn m Pri m Pn m Pn m

' • 'Pri m Pri m Dup l Pri m Pri m Pri m Pn m Pri m

• Pn m Pri m Pri m Pri m •";'•:]• ' 'Rri m :•:>:.:• " Dup 1 ''.Z'-"'::Pr\my^-\

^ 8002 B

8002 B 800 3 800 3 800 3 800 3 800 3 800 3 800 3 800 3 800 3 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 4 800 5 800 5 800 5 800 5 800 5 800 5 800 5 800 5 800 5 800 5 800 6 800 6
: 80Ci 6 800 6 ::,; ; .0:800 6 0.03 5 <0.02 7 0.097 J <0.0 5 <0.06 3

' <0.06 6 - <0.02 9 '<0.b24'- ' <o'.027 J <0.p3 1 <0.02 5

' 2.8 J 2 9 <0.04 2 <0.02 6 <0.92 2 <0.020 J <0.024 J 8 2 <0.05 3 <0.04 6 <0.04 6 <0.04 0 <0.04 5 <0.02 4

. <0'.02 2 <0.020 J

' ' '<P-02 7 0.024 J

. 0.77 J 3. 2 15. 9 16. 8 1 4

Th e followin g qualifier(s ) exist : CL P C : J —=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 3 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

- . • ••.'•• • '.. • SIT E \

800 6 •sopfe;-;'••:•. : 800 6 800 6 800 6 800 6 800 6 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 8 800 8 800 8 800 8 800 8 800 8 800 8 800 8 800 8 800 8 800 9 pMb'
- • •

' 800 9 ; 8d(D 9 • 800 9 [sppg-: : DAT E
09/06/200 0 10/10/200 1 10/10/200 1 09/05/200 2 09/11/200 3 09/11/200 3 09/13/200 4 10/23/199 6 1 10/10/199 7 09/23/1998 , 09/15/199 9

' 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/11/200 3 09/13/200 4 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 ••b9'/15/199 9 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 10/10/200 1 RESUL T TYP E

Pri m Pri m Dup l Pn m Pn m Du p 1 Pn m Pri m ' i , Pn m Pri m ; . Pn m Pri m Pn m Pri m Pn m Dup 1 , Pn m Du p 1 ' - Pri m Pri m Pn m Pn m ' Du p 1 Pri m Pn m Pri m Pri m

. .'Pri m Pri m Pri m Pri m Pn m Pri m Pri m SAMPL E I D

800 6 800 6 800 6 800 6 800 6 800 6 800 6 800 7 800 7
^ • 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 7 800 8 800 8 800 8 8008
- 800 8 800 8 800 8 800 8 800 8 800 8 800 9 800 9 800 9 800 9 800 9 800 9 ,

PCB' s (mg/kg ) 10. 4 0.81 J

_, 0.66 J 2.9 J 0.9 5 0.9 3 0 5 9 0.24 J '--

. •',
- 2 5 1 2 '"-;-''. ! 01 4 0.9 8 0.378 J 0.56 2 0.7 7 0.7 3 ;"•

• 0.48 J 0.48 J 0.047 J <0.05 6 <0.04 0

. 0.095 J

.. . , ' , . -- . 0.146 J <0.02 7 <0.02 7 0.034 J 0.03 5 <0.02 4 ' /

- •• " 0.279 J 0.93 J 0.3 4 0.15 4 1. 1 0.13 d

Th e followin g qualifier(s ) exist : CL P C : J - ;:•,•;:::•.;•.• , -•;0'^\::':'>':'•;;••. ' •;:::>;,::-:;i:^::;::F;r::::;;'^/:; / 

### p:;:&-::;^.-;g;|iii:;:^:^

^ ;:>;;:;:.:::;:;-^||j:;|ii|:||^ $MmffS^^}&fff$- ^ \y^J)'S^i:^M0ff9^ii-ZM5: \ %'j : ;;;;..;\":;i:'•^^;'^?;pg!;^j;;ih^;s;i^^ : ^ifv- '

-:-:.:,•/j::-.-:;,.^-.;;;-::-..;:^.;:-, , ,..; ; •. • :
•i^';;yHi;.:;pii::i:;;;:i7fi'::l;';:i^^

^ :

\;yy

. • ^yy-y'-yfi k

iy^Ci\^''My : \yy\'y % •• :
\" K;v:r^v';i':::Ov^;i;K-S:;:i;::N^:-:M ; •^••

. V

'.yy^^•yy.^y:,\:yyy^-^y'yyfi^i^yyyyyy:\'y" y

• . ; • ••'•'.;•

. iv-r!'::: : ^.^^\y': : . "^.

. ' : •:

••:--^r:-'"/:'i.':,:-;i;-:!:/i> : •;:••••; " ::«•••":,::: '

;:;•••;:-••. ; 'y.yyyy^iy^^:{y\/i^t^yVr : y".'

. ':[ ' ' V.'y
-

•y-^:\y:iim:M;/BM^Mr:' f
-=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 4 o f 9

PERIOD : Fro m 10/23/199 6 th m 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

SIT E DAT E RESUL T TYP E SAMPL E I D PCB' s (mg/kg ) 800 9 800 9 800 9 800 9 801 0 801 0 801 0 801 0 801 0 801 0 801 0 •801 0 801 0 8011 8011 ^801 1 801 1 8011 8011 8011 801 1 8011 801 2 801 2 801 2 801 2 801 2 •801 2 801 2 801 2 801 2 801 2 801 3 801 3 09/05/200 2 09/05/200 2 09/11/200 3 09/13/200 4 - 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 ' 10/10/200 1 09/05/200 2 09/11/2003 ' ,' • , 09/13/200 4 ;ip/23/ii996;;:;.;:;:-:;;: ; 10/10/199 7 09/23/i^98.'-:,i-:?7; : 09/15/199 9 09/06/2606^1; ; i?:

^ 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 c, 10/23/199 6 " 10/10/199 7 09/23/199 8 09/15/199 9 ' 09/06/200 0 09/06/200 0 10/10/200 1 09/05/2002
- 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 Pri m Dup l Pri m Pn m Pri m Pn m Pn m Pn m Pn m Pri m Pn m Pri m Pn m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Pri m Pri m Du p 1 Pri m Pri m Pri m Pri m Pri m Pri m 800 9

800 9 800 9 800 9 801 0

- '.801 0 801 0

' / '-SO'I O , ' ,

" ' 801 0 ;80i b 801 0

. ' ''801 0 801 0

- 8011 ' 801 1 8011

. 8011 '8011 ' 8011 8011 801 1 ''8011 , 801 2 801 2 801 2 801 2 801 2 801 2 801 2 ,801 2 801 2 '801 2 801 3 801 3 ' 0.30 4

0.29 3 0. 2 0.2 2 0.11 J <0.04 3
< 0 04 0 <0.04 7 <0.02 4 <0.p2 1 <0.02 0 <0.02 4 <0.02 4 "0.044 J 0.039 J 0.05 3 0.05 3 <0.02 6 <0.02 5 <0.02 5 <0.02 9 <0.02 3 0.132 J 0.34 J 0.5 3 <0.05 9 0.1 4 0.16 8 <0.02 4 0.17 8 0.1 1 0.57 J 0.47 J 5.7 J

Th e followin g qualifier(s ) exist : CL P C : J —=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 5 o f 9

PERIOD : Fro m 10/23/199 6 tha i 09/13/200 4 - Inclusiv e SAMPL E TYPE
- Soi l

SIT E DAT E RESUL T TYP E SAMPL E I D PCB' s (mg/kg ) 801 3 801 3 801 3 801 3 801 3 801 3 801 4 801 4 801 4 801 4 801 4 801 4 801 4 801 4 801 4 801 4 801 4 801 5 801 5 801 5 801 5 .801 5 801 5 801 5 801 5 801 5 801 6 801 6 801 6 801 6 801 6 801 6 801 6 801 6 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 , ., • 10/23/199 6 10/23/199 6 10/10/199 7 09/23/19984 , ,.; , 09/15/199 9 0"9/15/199 9 - . 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 ' 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 ' > 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 • 09/06/200 0 10/10/200 1 , 09/05/200 2 09/11/200 3 Pri m Pri m Pri m Pri m Pri m

- Pn m Pn m Dup l Pn m

. - -Pn m Pn m

' ." " Du p 1 Pn m

. , - Pn m Pn m

' Pn m Pn m Pn m Pn m Pn m Pn m

, : • - Pri m • ' Pri m Pri m Pri m .Pri m Pri m Pri m Pri m

• Pri m Pri m

' • Pri m • Pri m Pri m 801 3

801 3 801 3 801 3 - 801 3

- ' , ,-8013 ' '

- 801 4

• 801 4 801 4 '. ' , 801 4

. 801 4

• ' 80I 4 801 4 801 4 801 4 8014

. 801 4 * 801 5 801 5 '801 5 801 5

- ",801 5 801 5 801 5 801 5 801 5 801 6

.-. , ,801 6 801 6 '801 6 801 6

' ' 8016
- 801 6 801 6 0.052 J

<0.02 2 <0.01 9 <0.01 9 <0.02 3
< 0 02 2 0 043 J 0 093 J 0 039 J 0 4 3 0 05 8 0 05 2 1 5 0 238 J 0 206 J 0 1 7 0 4 3
< 0 04 6 <0.09 2 <0.04 6 <0.04 5 <0.02 5 <0.02 1 <0.02 0 <0.02 4

- <0.02 1 <0.05 6

• <0.05 3 0.07 1 <0.05 8 <0.04 1 <0.03 2 <0.027 J 0;03 1

Th e followin g qualifier(s ) exist : CL P C : J —=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 6 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

SITE
801 6 801 7 801 7 801 7 801 7 8017
- 801 7 [•801 7 - - ' 801 7 801 7 801 7 801 8 801 8 '801 8 801 8 801 8 801 8 801 8 • 801 8 '801 8 801 9 'sojig-.

. 801 9 i;801 9 8019 * 801 9 801 9 801 9 801 9 802 0 802 0

' 8020 " 802 0 802 0 DAT E
09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 , • 10/10/200 1 09/05/200 2 .' ' 09/11/200 3 09/13/200 4 09/13/200 4 10/23/199 6 10/10/199 7 ;--.-;;-::^y:09/23/i;^98^;::; i 09/15/199 9 :^.: : 09/06/2000' • ;;:•!;;: " 10/10/200 1 .^i V

. .09/05/2002;:^ : ::;;:;i: : 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 , . .- . 09/23/199 8 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 • 09/23/199 8

• 09/15/199 9 RESUL T TYP E

Pri m Pri m Pri m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Du p 1

, . . -Pri m Pri m

' , , ' Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Dup l Pri m SAMPL E I D •

801 6

. 801 7 801 7

- 801 7 801 7 801 7 801 7

, '801 7 - 801 7 801 7 801 7 ,8018
- , , 801 8

' .8018
- 801 8 801 8 801 8 8018 ' ' ' 801 8 801 8 801 9 801 9 80'l 9 801 9 801 9 ,801 9 801 9 '801 9 801 9 802 0 802 0 802 0 802 0 802 0 PCB' s

(mg/kg ) <0.02 4 <0.05 3 <0.05 6 0.6 7

. <0.05 7 <0.03 1 <0.03 1 <0.03 0 .' , • ' ' <0.03 4 0.06 7

. • - 0.047 J <0.04 3 "

. . <0.04 3 <0.04 3 <0.05 4 <0.02 3 0.3 J 0.2 J <0.04 8 0.034 J 0.029 J 0.247 J 0.27 6 <0:05 0 <0.03 0 0.49 J 0.394 J <0.04 4 0.037 J 0.059 J 0.23 4 <0.05 3 <0.05 3 <0.04 4

Th e followin g qualifier(s ) exist : CL P C : J •••:: . :ii:-^-'::;l:^^;h-i';'^^:'--^'^^^i; ^ yy^tiykMvy:yMr':-''-'- W :-yty,y\y:A^yyyy[]: y



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''-•-y':"y-'^}y:['Yyk\y-''-':yyWy-

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im^yZW^y.:,::- ] .Zry:y: M

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. ••.:;•:.':;'•: ; • . • • ' •' • ','•':: : ';• "

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—=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 7 o f 9

PERIOD : Fro m 10/23/199 6 tha i 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

SIT E

802 0 ;8020: ' ••:.:. , 802 0 802 0 802 0 802 0 802 1 802 1 802 1 802 1 802 1 802 1 802 1 802 1 802 1 802 1 802 1 802 2 802 2 802 2 ' 802 2 802 2 802 2 .802 2 802 2 802 2 802 2 802 3 802 3 802 3 802 3 :-8p23-;;.;';-'-^':
- 802 3 80^3

. ,.:':;•::; \ DAT E

09/06/200 0
: : 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6

- 10/10/199 7 10/10/199 7 09/23/199 8 09/15/199 9

- ' 09/06/i200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 09/23/199 8 09/15/199 9 09/06/200 0 10/10/200 1 09/05/200 2 09/05/200 2 09/11/200 3 09/13/200 4 10/23/199 6 10/10/199 7 :/:,.:;:.: : '.^09/23/1998
-

09/15/199 9 ; ..;p9/o6/26op;-

. • 10/10/200 1 ::•••:;:•.• ' :'i;0/1p/^b01-.::.:: V RESUL T TYP E

Pri m Dupl ' Pri m Pri m Pri m Pri m Pn m Pn m Du p 1 •Pn m Pn m Pn m Pn m Pn m Pn m Dup l Pn m Pn m Pn m Pn m Pn m Pri m Pn m Pri m Dup l Pn m Pri m Pri m Pri m Pri m Pri m

• :'Prinrtj'

. Pri m

. .-Dup l .:>:: . . SAMPL E I D

802 0 ..;'.:802P- : •; : 802 0 802 0 802 0 802 0 802 1 802 1 802 1

, • 802 1 •"

. 802 1 '8021'
- '' ' - 802 1 802 1 802 1 802 1 802 1 802 2 802 2 802 2 802 2 802 2 802 2 802 2 802 2 802 2 802 2 802 3 802 3 802 3 802 3 ••••; • •8023':|-:.

. 802 3 :--'8023:.--'•;.;:•••;• • . PCB' s (mg/kg ) 0.02 8 ;: ; 0,0 5 • <0.02 8 0.077 J <0.032 J 0.021 J
< 0 06 3 '0.103 J ' .';.-
- . . : 0 0 6

. . <0.06 3 • '

. " • 7 ' ' <0.05 7

. <0.026
- ' ' ' : :,'*< [
< 0 03 2 <0.02 9
< 0 03 9 <0.03 9 0.032 J

< 0 05 9 <0.06 3
< 0 06 3 <0.05 5 <0.02 6 <0.02 9 0.039 J 0.042 J <0.p3 8 0.04 8 0.05 J <0.05 9 <o.o7 9 :•. : •;-:::':^'vv:":Wii i <0.05 6 ••'i ; xo-02^':\;;M-

. :•.:r;^.-:---.;::-: ' -y^';•;-•::': ' <0.02 5 

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• ••'.• ' •,:.;;.;•. . >: •v : zM'fr' y

Th e followin g qualifier(s ) exist : CL P C : J —=No t analyze d <ytyy' %

\ :. • ..-'.i^i v

"'rcrF^Vyiy y 

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## W MCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 8 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

SIT E DAT E RESUL T TYP E SAMPL E I D PCB' s (mg/kg ) 802 3 802 3 802 3 803 9 803 9 803 9 803 9 803 9 803 9 803 9 803 9 9A92 5 9A92 5 .9A92 5 9A92 5 '9B00 0 9B00 0 9B00 0 9B00 0 9B00 0 9B92 5 !9B92 5 9B92 5 9B92 5 9C00 0 9C00 0 9C00 0 9Cp0 0 9C00 0 ^Qmis.yi:'''' : 9C02 5 '9ep2 5 : 9C02 5 ••smzByf

. y-: : 09/05/200 2 09/11/200 3 09/13/200 4 10/10/199 7 09/23/199 8 ; . ; -•;:;P9/15/199 9 ; : 09/06/200 0 ^yWS0tiM/2op:i M 09/05/200 2 ;|||;:::;:D^/iji/2oP3:
- ;

• 09/13/200 4 ^:;'•^;;::p;;;s1p/1b/2P01r•

. ;;•.: ; 09/05/200 2 :i;;i;>;, , ;09/1l/2pp 3

. 09/13/200 4 ;:;:'^;-'Pi:'p9/06/2Pp6:; : v.- : 10/10/200 1 :-;-''i:#::^;i:p9/65/2002: ; 09/11/200 3 yfiM:0m3(2 m --j'
- 10/10/200 1

' • , • 09/05/200 2 09/11/200 3 09/13/200 4 09/06/200 0 10/10/200 1 09/05/200 2

• 09/11/200 3 09/13/200 4 •:::;:.:,'::;'-09/06/2000

. 10/10/200 1 ::./

. 09/05/2002:. ' 09/11/200 3

' .::;,V.:09/13/2004:,..'. • Pri m Pri m Pri m Pri m - = Pri m Pn m Pn m Pn m - ''.^ Pn m Pn m ' - Pn m Pn m Pn m Pri m Pri m Pri m • Pri m Pn m Pri m Prim ' • Pri m Pri m Pn m Pri m Pri m Pri m Pri m ,Pn m Pri m Pri m '

. • Pri m Pri m Pri m Pri m 802 3

802 3 802 3 8039 " , 803 9 8039 ' 803 9

- ' 803 9 803 9

, 803 9 -•' 803 9 9A92 5 9A92 5 9A92 5 9A92 5 9B00 0 9B00 0 9B00 0 9B00 0

' • ' 9B00 0 9B92 5

. • ;9B92 5 9B92 5 9B92 5 9C00 0 9C00 0 9C00 0

• . 9C0'0 p 9C00 0

' 9C02 5 9C02 5

• 9C02 5 9C02 5 9C02 5 <0.02 6

<0.03 0 <0.02 5 <0.05 9 0.02 9 <0.06 1 <0.03 3 <0.02 4 <0.02 4 0 08 8 <0.02 7 0.086 J 0.65 J 0.6 7 0.68 J 12. 6 0.65 J 0. 9 2. 1 1. 4 J 0.279 J

- , 0.-135J 0.2 1 0.2 7 2.0 5 0.32 J 1.9 1 0. 6 0.79 J 1.9 9 0.03 5 0.76 J 0.4 9 0.058 J

Th e followin g qualifier(s ) exis L CL P C ; J —=No t analyze dCentra l Main e Powe r O'Conno rCompan ySuperfun d Sit e Rigg s Broo k

Sedimen t Monitorin g Progra m Sediment/Wetlan d Soi l Monitorin g Result s Page : 9 o f 9

PERIOD : Fro m 10/23/199 6 thr u 09/13/200 4 - Inclusiv e SAMPL E TYPE : Soi l

•sitE'':; : ••. •
9C05 0 :;sc650:;: : ; 9C05 0 -9C05 0 9C05 0 9C07 5 9C07 5 -9C075

. 9C07 5 .9C075 ' ' 9C10 0 -9C10 0 9C10 0 9C10 0 9C10 0 9C12 5 - 9C12 5 9C12 5 9C12 5 '9C125
- . 9C92 5 9C92 5 9C92 5 9C92 5 ••• ' '"^DATE ' • •
09/06/200 0 ::•:;:; ; 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4
^ 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 09/06/200 0 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 10/10/200 1 09/05/200 2 09/11/200 3 09/13/200 4 REisUL T

. • TYPE-.'
-
Pri m : Pri m : : Pri m Pri m Pri m Pri m Pri m Pri m Pn m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m Pri m SAMPL E I D

9C05 0 9C05 0 9C05 0 9C05 0 9C05 0 9C075
- 9C07 5

" -'9C07 5 - 9C;075

• 9607 5 9C10 0 190100 , 9C10 0 9Cl6 0 9C10 0 9C12 5 9C12 5 9C12 5 9C12 5 9012 5 9C92 5 9C92 5 • ' 9C92 5 9C92 5 PCB' s

(mg/kg ) 7. 3 0.39 J 1.44J 0.3 5 0.59 J 11. 2 2.32 J

' 1.94 J 0.7 8 0.2 J 3. 8 0.47 J 1.13J 1. 1 2. 1 5. 5 0.51 J 0.75 J 1 0.63 d - ' ' 0.68 J 2.3 2 0.7 7 0.3 J '.; ' ••.•'•'•;. • ..:•••• ' :.;.:• • '
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Th e followin g qualifier(s ) exist : CL P C : J —=No t analyze d