Risk-Based Screening Levels Proxy Values (a)

Target Compound Proxy Compound Comments
cis-1,3-Dichloropropene 1,3-Dichloropropene mixed isomer RBC
trans-1,3-Dichloropropene 1,3-Dichloropropene mixed isomer RBC
alpha-Chlordane Chlordane mixed isomer RBC
gamma-Chlordane Chlordane mixed isomer RBC
Acenaphthylene Pyrene structure more like acenaphthene, but pyrene more conservative
Benzo(g,h,i)perylene Pyrene structure most like pyrene
Phenanthrene Pyrene structure like anthracene,but pyrene more conservative
delta-BHC alpha-BHC similar compound
Endosulfan I Endosulfan similar compound
Endosulfan II Endosulfan similar compound
Endosulfan sulfate Endosulfan similar compound
Endrin aldehyde Endrin similar compound
Endrin ketone Endrin similar compound
Aroclor 1262 PCBs-high risk  
Aroclor 1268 PCBs-high risk  
Total PCBs

PCBs-high risk

 

Cadmium-water

Cadmium-water  

Cadmium-soil or sediment

Cadmium-diet  
Chromium Chromium (VI) use lower Cr(VI) RBC
Lead-water Lead use action level (0.015 mg/L),
Lead-unrestricted soil Lead use EPA OSWER Guidance (400 mg/kg)
Lead-restricted soil Lead use EPA TRW adult lead model (800 mg/kg)
Manganese Manganese-Nondiet Use nondiet value except for fish
Mercury

Mercuric chloride
Methylmercury

mercury(elemental)

use inorganic (mercuric chloride) RBC for soil direct contact
use methylmercury for sediment, water, and tissue

use mercury (elemental) for inhalation

(a) Source: Langley Air Force Base Remedial Investigation Report for IRP Sites LF-01, LF-05, LF-15, LF-18, LF-22, and FT-41, Radian, November 1998.

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