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N - <br /> M <br /> ATC Associates Inc. <br /> M%TC <br /> 1117 Lone PalmAvenue, Suite 201 <br /> Modesto, California 95351 <br /> 209-579-2221 <br /> A S S O C I A T E S I N C . <br /> Fix: 209-579-2225 <br /> 12.2 Remediation Cessation Criteria <br /> Site specific cleanup goals for the subject site have not been established. Dissolved phase <br /> hydrocarbon cleanup goals will be discussed in fithure submittals. The USEPA has established <br /> regional screening levels for chemical contaminants at superfitnd sites. While the subject site <br /> does not qualify as a superfitnd site, USEPA screening levels for Region 9, which includes <br /> California, can be used a guide for remediating soil to levels such that expected cancer risk is <br /> below one in a million from normal exposure to said soil . The following table lists USEPA <br /> regional soil screening levels (RSL) for Region 9 in milligrams per kilogram as presented in the <br /> RSL table updated April of 2009 . <br /> Receptor GRO Benzene Toluene Ethylbenzene Xylenes. MTBE TBA 1 ,2-DCA <br /> Residential 1 . 1 5,000 5.7 G00 39 0.45 <br /> Industrial 5.6 46,000 29 2,600 190 2.2 <br /> * USI PA Region 9 Regional Screening LevelsupdatedApril 2009 <br /> SVE System Design Plan ATC Associates Inc. <br /> Stockton City Taxi <br /> Page 13 <br />