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San Joaquin County DIRECTOR <br /> oPQ•WN Environmental Health De artmentDonna Heran, REHS <br /> ? ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla,REH5 <br /> Stockton, California 95202-3029 <br /> PROGRAM COORDINATORS <br /> Mike Huggins,REHS,RDI <br /> c •. / p • Margaret Lagorio,REHS <br /> ; a o"RNA Website: www.sjgov.org/ehd Robert McClellon,REHS <br /> Phone: (209)468-3420 Jeff Carruesco,REHS,RDI <br /> Fax: (209)464-0138 Kasey Foley, REHS <br /> 16 December 2008 <br /> Ms Sandi Sarale <br /> PO Box 6066 <br /> Stockton, CA 95206 <br /> Subject: Sarale Farms <br /> 16500 W. Clifton Court Rd <br /> Stockton, CA 95206 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed <br /> historical and recent site data and Monitoring Well Installation Report (MWIR), <br /> dated 11 March 2008 and prepared by Advanced GeoEnvironmental, Inc. (AGEI) <br /> for the above-referenced site. In MWIR, and recent quarterly groundwater <br /> monitoring reports, AGEI has recommended: <br /> • Continued quarterly monitoring of monitoring wells MW-1 through MW-11; <br /> and <br /> • Additional assessment of impacted groundwater by installing new <br /> monitoring wells east of MW-2 and MW-3 and west of MW-4. <br /> The EHD agrees that additional monitoring wells are needed to complete the <br /> assessment of impacted groundwater, and therefore directs preparation and <br /> submittal of a work plan to the EHD to install monitoring wells screened in the <br /> first hydrogeological unit (HU-1) and/or in the second (HU-2), as appropriate. The <br /> wells should be installed west of MW-2, east or northeast of MW-4 and west, <br /> south and east of MW-4. It may be advantageous to obtain grab groundwater <br /> samples in these general locations as an initial step to determine the proper well <br /> locations. Submit the work plan to the EHD no later than 16 March 2009. <br /> Groundwater on the site in HU1 is impacted by petroleum hydrocarbons and 1,2- <br /> dichloroethane (1,2-DCA) that significantly exceed maximum contaminant levels <br /> (MCLs) established by the California Department of Health Services and/or <br /> Water Quality Objectives (WQOs) established by the Central Valley Regional <br /> Water Quality Control Board (CVRWQCB). The concentrations appear to require <br /> remediation to achieve site closure in a reasonable time period. HU-2 is impacted <br /> by high 1,2-DCA concentrations. At this time the EHD believes the site is <br /> adequately characterized to prepare a feasibility study for remediation of <br /> impacted groundwater and/or soil; therefore you are directed to submit a <br /> Directive Letter I208 <br />