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Y <br /> Cox & Cox <br /> 595 11th St., Tracy page 2 <br /> The Central Valley Regional Water Quality Control Board (CVRWQCB) has <br /> informed EHD that in order to justify leaving contaminated soil in place, the <br /> Potential health hazards of direct exposure, vapor emissions to indoor air, and <br /> gross contamination (odor, nuisance, gross pollution) from the soil must be <br /> evaluated. Currently, the CVRWQCB and EHD use the San Francisco Bay <br /> Regional Water Quality Control Board (SFBRWQCB) Environmental Screening <br /> Levels electronic version lookup tables (ESL Surfer-October 2005) to evaluate if <br /> the contaminated soil can remain in place. The ESL Surfer-October 2005 lookup <br /> tables can be found on the SFBRWQCB web site at <br /> http:www.waterboards.ca.gov/sanfranciscobay/esl.htm. Sites that have <br /> contaminant concentrations in soil that exceed the SFBCVRWQCB ESL Surfer <br /> concentrations must provide additional justification such as soil vapor sampling <br /> data or use of a model like the Johnson & Ettinger Model. Since it may soon be <br /> appropriate for your consultant to recommend NFAR for this site, any <br /> contaminated soil to be left in place should be evaluated for potential health <br /> hazards as discussed above. <br /> EHD has reviewed the required electronic submittals your consultant has made <br /> to Geotracker. After the latest QMR and the well head survey data (Geo Well- <br /> x, y, and z) has been submitted to Geotracker all currently required information <br /> will have been submitted to Geotracker. Your consultant has done an excellent <br /> job of submitting all the reports required since January 2005 as well as all of the <br /> EDF data required to be submitted since July 2001. Please continue to submit <br /> all information required to Geotracker as it is generated. <br /> Thank you for your continued cooperation and you may continue to direct your <br /> correspondence to Michael Infurna. You may contact him at (209) 468-3454 if <br /> you have any questions. <br /> Donna Heran, REHS, Director <br /> Environ ental Health De aent <br /> Michael J. Infurna Jr., enior REHS Margar�rio, REHS <br /> LOP/ Site Mitigation Unit IV Program Coordinator <br /> c: John Lynch —Wright Envir. 67 E. 10th St., Tracy, CA 95376 <br /> CVRWQCB — James L. Barton <br /> SW RCB—CUF — Mark Owens <br />