Geologic Vulnerability - Urban Watersheds: Geology, Contamination, and Sustainable Development - page 211

TABLE 6.4
Contaminant Types, Concentration, Mass Remediated for Site 1

Estimated
Contaminant Mass
Remediated kg/(lb)

Maximum
Concentration (μg/kg) a Contaminant

VOCs 91/(200)

DNAPL compounds
Tetrachloroethene 60,100

Trichloroethene 45,000

Cis-1,2-dichoroethene 20,000

Trans-1,2-dichloroethene 3,000

Methylene chloride 800

LNAPL compounds
Ethyl benzene 10,000

Xylenes 10,000

Acetone 280

Carbon disulfide 200

PNAs 113/(250)

Naphthalene 339,000

Acenaphthalene 18,000

Fluorene 22,000

Phenanthrene 280,000

Fluoranthene 156,000

Pyrene 13,000

Benzo[a]anthracene 4,800

Benzo[a]pyrene 3,200

Dibenzo[a,h]anthracene 1,800

Indeno[1,2,3-cd]pyrene 1,400

Chrysene 11,000

PCBs 16,000 2.2/(5)

Heavy metals 23/(50)

Arsenic 23,000

Chromium 530,000

Lead 930,000

a μg/kg = micrograms per kilogram.

physically inspected by a qualified professional and (2) confirmatory soil samples
were not collected and analyzed from the excavation pit to verify the tank did
not leak.
• Surface staining . Surface staining and stressed vegetation were observed near the
former location of a back door near the location where solvents were used inside
the manufacturing building, labeled “Main Building” on Figure 6.5.

The multiple Phase II subsurface investigations conducted at the facility identified four
main sources of contamination resulting in the release of contaminants and requiring
remediation. These sources of contamination included four areas with a track record of
prior spills. Other sources or releases were identified during site evaluation but were not
severe enough to require further action.