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San Joaquin County DIRECTOR <br /> PQ u NDonna Heran,RENS <br /> Environmental Health Department ASSISTANT DIRECTOR <br /> 600 East Main Street Laurie Cotulla,REHS <br /> � <br /> 2 <br /> W. { Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> • Mike Huggins, RENS, RDE <br /> Margaret Lagorio,REHS <br /> Website: www.Sigov.org/ehd Robert McClellon,REHS <br /> Phone: (209) 468-3420 ,teff Carruesco, REHS,RDI <br /> Fax: (209) 464-0138 Kasey Foley, REHS <br /> 21 July 2009 <br /> Ms Sandi Sarale <br /> P.Q. Box 6066 <br /> Stockton, CA 95206 <br /> Subject: Sarale Farms <br /> 16500 W. Clifton Court Road <br /> Stockton, CA 95206 <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed <br /> Additional Site Assessment Work Plan (WP), dated 25 March 2009 and Quarterly <br /> Report — First Quarter 2009 (QR), dated 26 May 2009, both prepared by <br /> Advanced GeoEnviron mental, Inc. (AGE) for the above-referenced site. In the <br /> WP, AGE proposed installation of six soil probe borings to assess impacted <br /> groundwater toward the west, south, east and northeast from the known plume <br /> area in the finer grained hydrologic unit 1 (HU1). <br /> Groundwater samples will be collected near the top of the water column at <br /> depths of approximately 15 feet below surface grade (bsg) for laboratory analysis <br /> for total petroleum hydrocarbons quantified as gasoline (TPHg), benzene, <br /> toluene, ethylbenzene and total xylenes (BTEX), fuel oxygenates and lead <br /> scavengers. <br /> The EHD approves the proposed scope of work as necessary and adequate <br /> (H&S 25296.10[c][31) for delineation of impacted groundwater in the shallow <br /> hydrological unit. Submit a well permit application and appropriate fees to the <br /> EHD. <br /> To comply with Resolution 2009-0042, recently adopted by the State Water <br /> Resources Control Board, the well monitoring and sampling frequency is hereby <br /> reduced to the following; <br /> • Semi-annually — MW-1 through MW-4 and MW-11; and <br /> • Annually - MW-5 through MW-10. <br /> Depth to water should be gauged in all wells during each monitoring event. The <br /> EHD will evaluate an alternative sampling frequency if proposed by your <br /> Monitoring Reduction and Work Plan Approval Letter 0709 <br />