Contaminant Risk Factors - Urban Watersheds: Geology, Contamination, and Sustainable Development - page 353

TABLE 10.5
Summary of CRF GW for LNAPL and DNAPL VOCs, PAHs,
Other Select Compounds
Compound

Soil Type CRF GW

Mean LNAPL CRF GW Clay 1.41

Silty clay 7.12

Sand silty clay 7.60

Sand 11.40

Mean DNAPL CRF GW for degradation
sequence from PCE to vinyl chloride

Clay 333.00

Silty clay 773.00

Sand silty clay 1091.00

Sand 1274.00

Mean PAH CRF GW Clay 0.0001

Silty clay 0.0008

Sand silty clay 0.001

Sand 0.002

PCBs Clay 0.00002

Silty clay 0.00026

Sand silty clay 0.0003

Sand 0.0009

Pesticide chlordane Clay 0.0035

Silty clay 0.035

Sand silty clay 0.041

Sand 0.046

Chromium VI Clay 948.00

Silty clay 2080.00

Sand silty clay 2116.00

Sand 2300.00

Lead Clay 0.03

Silty clay 0.30

Sand silty clay 0.34

Sand 1.10

Mercury Clay 1.57

Silty clay 2.52

Sand silty clay 2.77

Sand 3.10

Arsenic Clay 9.88

Silty clay 11.26

Sand silty clay 21.12

Sand 50.25

Source: Kaufman, M.M. et al., Water, Air, and Soil Pollut ., 167, 365, 2005;

Rogers, D.T. et al., Assessment of groundwater contaminant
vulnerability in an urban watershed in southeast Michigan,
USA, in Urban Groundwater—Meeting the Challenge , Howard,
K.W.F. (ed), Taylor & Francis, London, U.K., 2007a, 129-144.