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i <br /> iv <br /> ENVIRONMENTAL HEALTH DEI�AR'I TENT <br /> SAN JOAQUIN COUNTY unitsuperrisors <br /> Donna K.Heran,R.E.H.S. - Ali Carl Bergman,R.E.H.S. <br /> Direc[m 304 East Weber Avenue, Third Floor l-Mike Huggins,R.E.H.S.,R.D.L. <br /> At Olsen,R.E.H.S. Stockton, California 95202-2708 Douglas W Wilson,R.E.H.S. <br /> L. • �.. F. .�'P Program Monnoer Telephone: (209) 468-3420 �'I Margaret Lagoi in,R E H.S. <br /> a iiFBR`' Robert McClellon,R.E.H.S. <br /> Laurie CetMa,R.E.H.S. Fax: (209) 464-0138 <br /> Program Manager Mark Barcellos,R.E.H.S. <br /> MICHAEL KARVELOT r EB 1 5 12005 <br /> QUIK STOP MARKETS INC <br /> 4567 ENTERPRISE STREET <br /> FREMONT CA 9.4538 <br /> ' RE: Quik Stop Market No. 132 <br /> 3555 West Hammer Lane i <br /> Stockton,California 95209 S ': <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 /> groundwater monitoring events. <br /> Requested Analyses' <br /> Monitoring Well <br /> t <br /> MW-1R Methyl tertiary-butyl ether(MTBE)by Method 9260B <br /> MW-2 MTBE,tertiary-butyl alcohol (TBA), and tertiary-amyl <br /> methyl ether(TAME)by Method'i8260B <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 Methad,8021B <br /> MW-5 MTBE,TAME, and TBA by Met lhod 8260E <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 />