FS-2 Source Area

Location

Concentration

Concentration

Year

FS-2 Source Concentration

2,500 µg/L

4,000 µg/L

1930

FS-2 Unsaturated Zone

1,750 µg/L

2,800 µg/L

1935

Coonamessett Pond area

Saturated Groundwater Path

0.084 µg/L

0.134 µg/L

1952

Coonamessett Pond area

Saturated Groundwater Path

1.68 µg/L

(Present day max. est.)

2.68 µg/L

(Present day max. est.)

1995

Coonamessett Pond

0.032 µg/L

0.051 µg/L

1960

Coonamessett Pond

(3 year acc. max. estimate)

0.52 µg/L

0.82 µg/L

1998

Coonamessett Pond Sediment

1.3x10^-5 µg/cm³

2.1x10^-5 µg/cm³

1960

Coonamessett Pond Sediment

(based on max. pond conc.)

2.2x10^-4 µg/cm³

3.5x10^-4 µg/cm³

1998

Coonamessett River

(pond pathway)

0.032 µg/L

0.051 µg/L

1960

Coonamessett River

(groundwater pathway)

0.048 µg/L

0.077 µg/L

1952

Coonamessett River

(groundwater pathway)

0.97 µg/L

(maximum estimate)

1.54 µg/L

(maximum estimate)

1995

Coonamessett River Sediment

(pond pathway)

1.3x10^-5 µg/cm³

2.1x10^-5 µg/cm³

1960

Coonamessett River Sediment

(groundwater pathway)

2.1x10^-5 µg/cm³

3.2x10^-5 µg/cm³

1952

Coonamessett River Sediment

(groundwater pathway)

4.1x10^-4 µg/cm³

(maximum estimate)

6.5x10^-4 µg/cm³

(maximum estimate)

1995

Air Pathway

3.36x10^-10mg/m³

5.36x10^-10mg/m³

1952

Air Pathway

6.72x10^-9 mg/m³

(maximum estimate)

1.072x10^-8 mg/m³

(maximum estimate)

1995