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MegansettHarbor

SqueteagueHarbor

Red BrookHarbor

HenCove

PocassetHarbor

Phinney's Harbor

Cape Cod Canal

Cape Cod Bay

Wild Harbor

Route

28

Route 151

Route 28

Route 13

0

Route 6

Route 130

Route

28

LongPond

CS-23

J-3

FS-28

CS-10

Quaker Meetinghouse

Rd

L Range

LF-1

!!

MoodyPond

Several FS-12 extraction and reinjection wellsare turned off (not shown at this scale)

J-1

WesternBoundary

CS-21

All SD-5 extractionwells are turned off

AshumetValley

AshumetValley

CS-10CS-10

CS-20

CS-20

Joint Base Cape Cod

Burgoyne Rd

"S

"S

"S

"S

FTA-2

PFSA

JohnsPond

Wakeby Pond

MashpeePond

AshumetPond

PetersPond

CoonamessettPond

SnakePond

JenkinsPond

WeeksPond

Crooked Pond

Deep Pond

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FS-28

AshumetValley

FS-29

CS-21FS-1

CS-20

FS-12

CS-4

CS-19

LF-1

J-2

Demolition Area 1

Central Impact Area

NorthwestCorner

Demolition Area 2

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Jefferson Rd

Barlo

w RdGibbs Rd

Connery Rd

Turpe

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Frank

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s Rd

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l View

Rd

WS-4

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SqueteagueHarbor

Red BrookHarbor

HenCove

PocassetHarbor

Phinney's Harbor

Cape Cod Canal

Cape Cod Bay

Wild Harbor

Route

28

Route 151

Route 28

Route 13

0

Route 6

Route 130

Route

28

LongPond

CS-23

J-3

FS-28

CS-10

Quaker Meetinghouse

Rd

L Range

LF-1

!!

MoodyPond

Several FS-12 extraction and reinjection wellsare turned off (not shown at this scale)

J-1

WesternBoundary

CS-21

All SD-5 extractionwells are turned off

AshumetValley

AshumetValley

CS-10CS-10

CS-20

CS-20

Joint Base Cape Cod

Burgoyne Rd

"S

"S

"S

"S

FTA-2

PFSA

JohnsPond

Wakeby Pond

MashpeePond

AshumetPond

PetersPond

CoonamessettPond

SnakePond

JenkinsPond

WeeksPond

Crooked Pond

Deep Pond

CS-10LF-1

FS-28

AshumetValley

FS-29

CS-21FS-1

CS-20

FS-12

CS-4

CS-19

LF-1

J-2

Demolition Area 1

Central Impact Area

NorthwestCorner

Demolition Area 2

Gree

nway

RdWood Rd

Jefferson Rd

Barlo

w RdGibbs Rd

Connery Rd

Turpe

ntine

Rd

Frank

Perkin

s Rd

Pew

Rd

Cana

l View

Rd

WS-4

Surface water from Long Pond is alsoused as a drinking water source forthe town of Falmouth

Path: Y:\Figures\General\ERC_Plumemap\GIS\20140408\GIS\Arcmap\erc_plumemap_20140410.mxd Date: 6/12/2014 Time: 9:08:37 AM User: 1272479611E

Bourne

Sandwich

Falmouth Mashpee

MCL – Maximum Contaminant LevelMMCL – Massachusetts Maximum Contaminant LevelHA – Federal Lifetime Health AdvisoryGW-1 – State 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 millionRBC - Site Specific Risk Based Concentration

Chlorinated Solvents Plume - Concentrations Exceed MCLs TCE = 5.0 µg/L PCE = 5.0 µg/LEDB Plume -Concentrations Exceed MMCL = 0.02 µg/LPerchlorate Plume - Concentrations Exceed MMCL = 2.0 µg/L

Town Boundary

Treatment System Pipeline:Infiltration Trench/Gallery

Influent Effluent

Legend

Contaminant of Concern (COC)TCE – trichloroethenePCE – perchloroetheneCCI4 – carbon tetrachlorideEDB – ethylene dibromidebenzenevinyl chloride1,1,2,2-tetrachloroethane1,4-dichlorobenzenemanganesethalliumleadtolueneRDX - hexahydro-1,3,5-trinitro-1,3,5-triazine

perchlorate

Type of Contaminantsolvent solventsolventfuel-related compoundfuel-related compoundsolventsolventsolventmetalmetalmetalfuel-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/LMCL = 5 µg/LEPA Health Advisory = 300 µg/LMCL = 2 µg/L15 µg/L (treatment technique action level for water distribution systems)MCL = 1,000 µg/LHA = 2 µg/LGW-1 = 1 µg/L10 = 0.6 µg/LHA = 15 µg/LMMCL = 2 µg/L

C5-C8 aliphatic hydrocarbons

The areas of contaminationshow the combined contaminants

of concern within each plume.

Note: ppb = parts per billion andis a measure of concentration.

It is approximately equivalent tomicrograms per liter (µg/L).

Scale: 1 inch = 1 mile

Municipal Water Supply Well#*

RDX Plume - Concentrations exceed EPA 10-6 risk-based level = 0.6 ppb

Extraction Well

"S Treatment Facility

Reinjection Well!!D Extraction Well (Off)

!!D Reinjection Well (Off)Outflow Bubbler

O0 0.5 1

Miles

Plumes with Remedy in Place

Plumes with Interim Remedy in Place

Fuel Plume - The Following Contaminants Exceed AssociatedMCP GW1 or RBC Groundwater Standards:C5-C8 aliphatic hydrocarbons, GW-1 = 300 µg/LC9-C10 aromatic hydrocarbons, GW-1 = 200 µg/LC9-C12 aliphatic hydrocarbons, GW-1 = 700 µg/LC11-C22 aromatic hydrocarbons, GW-1 = 200 µg/L1,2,4-TMB, RBC = 19 µg/L1,3,5-TMB, RBC = 19 μg/L2-methylnaphthalene, GW-1 = 10 µg/L

fuel-related compound GW-1 = 300 µg/LC9-C10 aromatic hydrocarbons fuel-related compound GW-1 = 200 µg/LC9-C12 aliphatic hydrocarbons fuel-related compound GW-1 = 700 µg/LC11-C22 aromatic hydrocarbons fuel-related compound GW-1 = 200 µg/L1,2,4-TMB fuel-related compound RBC = 19 µg/L1,3,5-TMB fuel-related compound RBC = 19 µg/L2-methylnaphthalene fuel-related compound GW-1 = 10 µg/L

Joint Base Cape CodGroundwater Plume Map

Issued June 2014

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