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ENVIRONMENTAL HEALTH DEPARTMENT <br /> SAN JOAQUIN COUNTY <br /> �.•'= '•oL Unit Supervisors <br /> Z` 9 2 Donna K.Heran,R.E.H.S. <br /> 344 East Weber Avenue, Third Floor Carl Eorgman, R.E.H.S. <br /> Director Mike Fluggins,R.E.H.S.,R.D.I. <br /> `Y'S Al Olsen,R.E.Ft.S. Stockton, California 95202-2703 <br /> �,:• Douglas W.Wilson,R.E.H.S. <br /> •.c Pr•o. win Manager Telephone: (209) 46$-3420 Margaret Lagorio,R.E.H.S. <br /> OR <br /> a Laurie A.Catulla,R.E.H.S. Fax: (209) 464-0138 Robert McClellon,R.E.H.S. <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> MICHAEL KARVELOT FEB 15 2005 <br /> QUIK STOP MARKETS INC <br /> 4567 ENTERPRISE STREET <br /> FREMONT CA 94538 <br /> RE: Quik Stop Market No. 132 <br /> 3555 West Hammer Lane <br /> Stockton,California 95209 <br /> San Joaquin County Environmental Health Department(EHD)has reviewed the analytical results for <br /> groundwater samples collected quarterly from the above-referenced site in response to recommendations <br /> by ATC Associates Inc. (ATC) to reduce monitoring frequency and remove several wells from the <br /> monitoring program. EHD approves the removal of monitoring wells MW-3,MW-6, MW-7, and MW-8 <br /> from the quarterly groundwater sampling program as non-detect results or very low concentration results <br /> have been detected in these wells over the past two years. Please continue the quarterly monitoring of <br /> MW-1R, MW-2,MW-4,MW-5, MW-9,and MW-10 and report these compounds during future quarterly <br /> Sgroundwater monitoring events. <br /> Monitoring Wel! Requested Analyses <br /> MW-1R MethyI tertiary-butyl ether(MTBE)by Method 8260B <br /> MW-2 MTBE, tertiary-butyl alcohol (TBA),and tertiary-amyl <br /> methyl ether(TAME)by Method 8260B <br /> MW-4 Total petroleum hydrocarbons as gasoline(THP-g)by <br /> Method 8015B, and benzene,toluene,ethyl benzene,and <br /> total xylenes(BTEX)by Method 8021B <br /> MW-5 MTBE,TAME,and TBA by Method 8260B <br /> MW-9 MTBE by Method 8260B <br /> MW-10 MTBE by Method 8260B <br /> Also continue collecting depth to water measurements in all wells during each quarterly groundwater <br /> monitoring event for the purpose of determining the groundwater gradient. <br />