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Grewal's Market <br /> Page 2 <br /> 4100 East Fremont Street January 23,2009 <br /> Stockton,California 95215 <br /> In Quarterly Report - Fourth Quarter 2008, AGE recommended limited in-situ chemical oxidation <br /> to remediate the dissolved hydrocarbon plume. Prior to implementing any remediation, the EHD <br /> directs that the petroleum hydrocarbon plume be delineated south of the site; contaminant mass <br /> estimates, supported by calculations, for both sorbed and dissolved MTBE, 1,2-DCA, and TPH-g <br /> be submitted, as well as a fate and transport model of the three substances to assist the EHD to <br /> evaluate the risk posed by the sorbed contaminants. Submit the mass estimates, along with the fate <br /> and transport model to the EHD by April 1, 2009. Once the site is well characterized, if active <br /> remediation appears to be appropriate, several methods for the remediation should be evaluated and <br /> presented in a corrective action plan. l <br /> 1 <br /> By letter dated March 17, 2008, the EHD had directed that soil concentrations of contaminants of <br /> concern that exceeded the Environmental Screening Levels (ESLs) (San Francisco Bay Regional <br /> Water Quality Control Board) for gross contamination and direct exposure be addressed. To date, <br /> the EHD has not received a response to this directive. Submit an evaluation of soil concentrations <br /> that exceed ESLs to the EHD by March 4, 2009. <br /> "Site Background" included in Appendix A of Cone Penetration Testing Site Investigation — <br /> Second Quarter 2008, included information that was incorrect. Specifically, bullet - January 2002 <br /> did not include information about soil borings P-10, P-11, and P-12, and MW-4. Instead, the data <br /> were a repeat of bullet -February 2000. Also the last paragraph of Section 4.0 included misleading <br /> information. Please revise Section 4.0 before submitting this section in future reports. <br /> If you have any questions, please contact Vicki McCartney, Senior Registered Environmental <br /> Health Specialist,by telephone at (209)468-9852 or by email at vmcearmey u:Rsic hd.con-i. <br /> Sincerely, <br /> i6e AAt 6"1 <br /> Victoria L. McCartney,REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health pecialist Engineering Geologist <br /> c: Mr. Daniel J. Villanueva, Advanced GeoEnvironmental, Inc., 837 Shaw Road, Stockton, <br /> California 95215 <br /> Mr.James L.L. Barton,PG, California Regional Water Quality Control Board Central Valley <br /> Region, 11020 Sun Center Drive, Suite 200,Rancho Cordova, California 95670 <br /> I <br /> 4 . <br /> t <br />