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Red BrookHarbor

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PocassetHarbor

Phinney's Harbor

Cape Cod Bay

Wild Harbor

R oute28

R oute 151

R oute28

R oute130

R oute 6

Route 130

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LongPond

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useR d

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LF-1

MoodyPond

J-1

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All S D-5 extractionwells are turned off

Ashum etValley

Ashum etValley

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Joint Base Cape Cod

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Form er CS -20Plum e Area

Form er CS -23Plum e Area

S S 090 'PFAS S ite'T ank er T ruck R ollovers

S S 091 'PFAS S ite'ANG Motor Pool Area

S S 092 'PFAS S ite' Form er Building 118 and R unway 32

S S 093 'PFAS S ite' Form er Fire Departm ent Building 122

S S 031 'PFAS S ite' Fuel S pill 1 (FS -1)

S S 097 'PFAS S ite'Lower 40 R am p Areaand Hangar 2816

S S 095 'PFAS S ite'US CG Hangars3170 and 3172

S S 094 'PFAS S ite'W astewater T reatm entPlant Infiltration Beds

JohnsPond

Wakeby Pond

MashpeePond

AshumetPond

PetersPond

CoonamessettPond

SnakePond

JenkinsPond

WeeksPond

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Deep Pond

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Joint Base Cape Cod

Burgoy ne

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Form er CS -20Plum e Area

Form er CS -23Plum e Area

S S 090 'PFAS S ite'T ank er T ruck R ollovers

S S 091 'PFAS S ite'ANG Motor Pool Area

S S 092 'PFAS S ite' Form er Building 118 and R unway 32

S S 093 'PFAS S ite' Form er Fire Departm ent Building 122

S S 031 'PFAS S ite' Fuel S pill 1 (FS -1)

S S 097 'PFAS S ite'Lower 40 R am p Areaand Hangar 2816

S S 095 'PFAS S ite'US CG Hangars3170 and 3172

S S 094 'PFAS S ite'W astewater T reatm entPlant Infiltration Beds

JohnsPond

Wakeby Pond

MashpeePond

AshumetPond

PetersPond

CoonamessettPond

SnakePond

JenkinsPond

WeeksPond

Crooked Pond

Deep Pond

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S urface water from Long Pond is alsoused as a drink ing water source forthe town of Falmouth

Path: Y :\Figures\General\K arson\2018\12112018_R equest\GIS \Arcm ap\erc_plum em ap_20181211_LUC.m xd Date: 1/8/2019 T im e: 11:10:45 AM User: JMES S NE1

Bourne

Sandwich

FalmouthMashpee

MCL – Maxim um Contam inant LevelMMCL – Massachusetts Maxim um Contam inant LevelHA – Federal Lifetim e Health AdvisoryPFAS - Per- and Poly fluoroalk yl S ubstancesGW -1 – S tate default cleanup value to be used in lieu of site-specific risk -based level10 – EPA level resulting in an excess cancer risk of one in a m illionR BC - S ite S pecific R isk Based Concentration

Chlorinated S olvents Plum e - Concentrations Exceed MCLs T CE = 5.0 µg/L PCE = 5.0 µg/LEDB Plum e - Concentrations Exceed MMCL = 0.02 µg/L

Perchlorate Plum e - Concentrations Exceed MMCL = 2.0 µg/L

T own Boundary

Treatment System Pipeline:

Infiltration T rench/Gallery (On)

Influent Effluent

Legend

Contaminant of Concern (COC)T CE – trichloroethenePCE – perchloroetheneCCI4 – carbon tetrachlorideEDB – ethy lene dibrom idebenzeneviny l chloride1,1,2,2-tetrachloroethane1,4-dichlorobenzenem anganesethalliumleadtolueneR DX - hexahy dro-1,3,5-trinitro-1,3,5-triazine

perchlorate

Type of Contaminantsolvent solventsolventfuel-related compoundfuel-related compoundsolventsolventsolventm etalm etalm etalfuel-related compoundexplosive

oxidizer

Risk-Based LevelMCL = 5 µg/LMCL = 5 µg/LMCL = 5 µg/LMMCL = 0.02 µg/LMCL = 5 µg/LMCL = 2 µg/LGW -1 = 2 µg/LMMCL = 5 µg/LEPA Health Advisory = 300 µg/LMCL = 2 µg/L15 µg/L (treatm ent technique action level for water distribution sy stem s)MCL = 1,000 µg/LHA = 2 µg/LGW -1 = 1 µg/L10 = 0.6 µg/L (IAGW S P); = 0.7 µg/L (IR P)HA = 15 µg/LMMCL = 2 µg/L

C5-C8 aliphatic hy drocarbons

T he areas of contam inationshow the com bined contam inantsof concern within each plum e.

Note:

S cale: 1 inch = 1 m ile

Municipal W ater S upply W ell#*

R DX Plum e - Concentrations Exceed EPA 10-6 R isk -Based Level = 0.6 µg/L (IAGW S P); = 0.7 µg/L (IR P)

Extraction W ell

"S T reatm ent Facility

R einjection W ell!!D Extraction W ell (Off)

!!D R einjection W ell (Off)Outflow Bubbler

O0 0.5 1

Miles

Plum es with R em edy in Place

Fuel Plum e - T he Following Contam inants Exceed AssociatedMCP GW -1 or R BC Groundwater S tandards:C5-C8 aliphatic hy drocarbons, GW -1 = 300 µg/LC9-C10 arom atic hy drocarbons, GW -1 = 200 µg/LC9-C12 aliphatic hy drocarbons, GW -1 = 700 µg/LC11-C22 arom atic hy drocarbons, GW -1 = 200 µg/L1,2,4-T MB, R BC = 56 µg/L1,3,5-T MB, R BC = 60 μg/L2-m ethy lnaphthalene, GW -1 = 10 µg/L

fuel-related compound GW -1 = 300 µg/LC9-C10 arom atic hy drocarbons fuel-related compound GW -1 = 200 µg/LC9-C12 aliphatic hy drocarbons fuel-related compound GW -1 = 700 µg/LC11-C22 arom atic hy drocarbons fuel-related compound GW -1 = 200 µg/L1,2,4-T MB fuel-related compound R BC = 56 µg/L1,3,5-T MB fuel-related compound R BC = 60 µg/L2-m ethy lnaphthalene fuel-related compound GW -1 = 10 µg/L

Joint Base Cape CodGroundwater Plume Map,

IRP and IAGWSP LUC Areas,and IRP PFAS Outreach Areas

Issued December 2018

-6

-6

Infiltration T rench/Gallery (Off)IR P Land Use Control (LUC) Boundary

PFAS R eswell Outreach BoundaryIAGW S P Land Use Control (LUC) Boundary

Military Munitions R esponse Program(MMR P) S ource Area

IR P S ource Area