Pacific Southwest, Region 9
Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations
Regional Screening Levels (Formerly PRGs)
Regional Screening Level Resources
Near-Term TCE Vapor Intrusion Recommendations (PDF) (6 pp, 851K)
You will need Adobe Reader to view some of the files on this page. See EPA's PDF page
Screening Levels for Chemical Contaminants
The Region 9 PRGs have been harmonized with similar risk-based screening levels used by Regions 3 and 6 into a single table: "Regional Screening Levels (RSL) for Chemical Contaminants at Superfund Sites." These updated screening levels, along with a detailed user's guide and supplementary tables, can be accessed directly on-line or downloaded to your own computer. In addition, the web site contains a Screening Level Calculator to assist in calculating site-specific screening levels.
RSL Tables (Last updated January 2015)
The screening level (RSL) tables are available for download in Excel and PDF formats. These tables are considered ready for use. The tables contain both RSL calculations and the toxicity values that were used. For additional information please see the resources box at the the upper-right of this page.
TR=1E-06 and THQ=1.0
TR=1E-06 and THQ=0.1
|Residential Soil to Groundwater|
|Chemical Specific Parameters|
|Composite Table (Every Table)|
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