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Preliminary Remediation Goals (PRGs) are tools for evaluating and
cleaning up contaminated sites. They are risk-based concentrations
that are intended to assist risk assessors and others in initial
screening-level evaluations of environmental measurements. The PRGs
contained in the Region 9 PRG Table are generic; they are calculated
without site specific information. However, they may be re-calculated
using site specific data.
PRGs should be viewed as Agency guidelines, not legally enforceable
standards. They are used for site "screening" and as initial cleanup
goals if applicable. PRGs are not de facto cleanup standards
and should not be applied as such. However, they are helpful in
providing long-term targets to use during the analysis of different
remedial alternatives. By developing PRGs early in the decision-making
process, design staff may be able to streamline the consideration
of remedial alternatives.
Region 9 PRGs
2004 Table
(PDF 962 K, 16 pps., About
PDF)
A summary table that presents the final list
of generic PRG (for soil, air, and water) selected
for site screening in Region 9. Also available
as a Microsoft
Excel file (581K XLS).
InterCalc Tables: present additional
information not available in the R9 PRG Table above.
- Soil Calculations (PDF
355 K, 13 pps., About
PDF): lists pathway-specific
values for soils under residential and industrial
land-use scenarios.
- Air-Water
Calculations
(PDF 191 K, 13pps., About
PDF): lists pathway-specific
values for air and water assuming a residential
exposure scenario
- Phys-Chem
Data (PDF 140
K ,3 pps., About
PDF): includes volatilization
factors (VF) and soil saturation values (SAT)
for VOCs only.
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