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M� <br /> II <br /> San Joaquin County <br /> Pa"t" Environmental Health Department DIRECTOR <br /> �O.•_�•..co Donna Heran,REHS <br /> i600 East Main Street <br /> �' •"�� PROGRAM COORDINA70RS Stockton, California 95202-3029 Robert McClellon,REHS <br /> j Jeff Carruesco,REHS,RDI <br /> �'.q••......••��P Website: www.sfgov.org/ehd Kesey Foley,REHS <br /> C r F o <br /> Phone: (209)468-3420 Unda Turkalle,REHS <br /> i <br /> Fax: (209)464-0138 f <br /> V <br /> March 8, 2011 ? <br /> G <br /> Mr. Michael Karvelot <br /> Quik Stop Markets, Incorporated <br /> 4567 Enterprise Street <br /> r Fremont, California 94538 <br /> 4 Subject: Quik Stop Market No. 132 <br /> 3555 West Hammer Lane <br /> r� Stockton, California 95209 <br /> t� <br /> Dear Mr. Karvelot: <br /> r The San Joaquin County Environmental Health Department (EHD) has reviewed <br /> t� Groundwater Monitoring Report(December 21,2010), dated 09 February 2011, and Semi- p <br /> annual Groundwater Monitoring Report— First Quarter 2090 and Additional Investigation I <br /> r 1 Report, both prepared and submitted by your consulting firm, ATC Associates Inc. (ATC) <br /> for the above-referenced site. During the quarterly sampling events in 2010, contaminants <br /> of concern have not been detected in groundwater samples collected from monitoring well <br /> MWA 1, installed in January 2010 to delineate the vertical extent of petroleum hydrocarbon <br /> �! contamination down;gradient of the source area. Contaminants of concern were either not <br /> detected or detected at very low concentrations in soil samples collected at 12 feet below <br /> surface grade (bsg)from soil borings SB4 and SB5 in January 2010. <br /> In light of these analytical results, the EHD notified ATC by e-mail on 14 February 2011, to <br /> submit a Case Closure Summary and include an estimate of the time it will take before the <br /> r groundwater contaminant concentrations at this site will return to water quality goals. <br /> �1 If you have any questions regarding this letter, please contact Vicki McCartney at (209) j <br /> 468-9852 or by email at vmccartney@sjcehd.com. j <br /> Sincerely, <br /> f <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior.Registered Environmental Health Specialist Engineering Geologist I <br /> c: Scott Perkins, ATC Associates Incorporated, 6602 Owens Drive, Pleasanton, <br /> California 94588 <br /> Mr. James L.L. Barton, PG; California Regional Water Quality Control Board Central <br /> Valley Region, 11020 Sun Center Drive, Suite 200, Rancho Cordova, California 95670 <br /> G <br />