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u <br /> San Joaquin County <br /> Pool" Environmental Health Department <br /> DIRECTOR <br /> Q:� � 600 East Main Street Donna Heran,REHS <br /> Ni .'� Stockton, California 95202-3029 PROGRAM COORDINATORS <br /> 3� Robert McClellon,REHS <br /> • Jeff Carruesco,RENS,RDI <br /> CQ��FOR�\P Website: www.sjgov.org/ehd Kasey Foley,REHS <br /> Phone: (209)468-3420 Linda Turkatte, REHS <br /> Fax: (209) 464-0138 <br /> March 8, 2011 <br /> Mr. Michael Karvelot <br /> Quik Stop Markets, Incorporated <br /> 4567 Enterprise Street <br /> Fremont, California 94538 <br /> Subject: Quik Stop Market No. 132 <br /> 3555 West Hammer Lane <br /> Stockton, California 95209 <br /> Dear Mr. Karvelot: <br /> The San Joaquin County Environmental Health Department (EHD) has reviewed <br /> Groundwater Monitoring Report(December 21, 2010), dated 09 February 2011, and Semi- <br /> annual Groundwater Monitoring Report — First Quarter 2010 and Additional Investigation <br /> 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 /> MW-11, 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 /> groundwater contaminant concentrations at this site will return to water quality goals. <br /> If you have any questions regarding this letter, please contact Vicki McCartney at (209) <br /> 468-9852 or by email at vmccartney@sjcehd.com. <br /> Sincerely, C/ <br /> Victoria L. McCartney, REHS Nuel C. Henderson, Jr., PG <br /> Senior Registered Environmental Health Specialist Engineering Geologist <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 />