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r <br /> ENVIRUNMENTAL HEALTn DEPARTMENT <br /> "11V <br /> SAN JOAQUIN COUNTY <br /> x r Utut Supervfcors <br /> a ?, Donna K Heran,R E H S Carl Bor man,R E H S <br /> Dereclor <br /> 304 East Weber Avenue, Third Floor g <br /> , <br /> - Al Olsen,R E H S Stockton California 95202-2708 Mike Huggins,R E H 5 ,R D i <br /> Douglas W Wilson, R E H S <br /> C, <br /> " Progrmn Manager <br /> Telephone (209) 468-3420 Margaret Lagorio,R E H 5 <br /> Q�rFoa� Laurie A Cotulla,R E H 5 <br /> Prop Maria er Fax (209) 464-0138 Robert McClellon, R E H S I <br /> g S Mark Barcellos,R E H S <br /> I <br /> I <br /> I <br /> MICHAEL KARVELOT MAR 2 12003 <br /> QUIK STOP MARKETS INC <br /> 4567 ENTERPRISE STREET <br /> FREMONT CA 94538 <br /> RE Quik Stop Station No 076 SITE CODE 887 <br /> i <br /> 1030 South Olive Avenue RO 887 <br /> Stockton, CA 95215 <br /> i <br /> San Joaquin County Environmental Health Department (EHD) has reviewed Results of <br /> Soil and Groundwater Investigation, dated 25 June 2002, and submitted on your behalf <br /> by Horizon Environmental Inc (Horizon) Petroleum hydrocarbons were detected in <br /> groundwater samples collected from soil bonngs SB-1, SB-2, and SB-3, soil samples <br /> collected from these three borings had less than detectable concentrations of fuel <br /> components <br /> EHD does not concur with Horizon's recommendation for"no further action" status for <br /> the subject site, but has determined that further site investigation is necessary to assess <br /> the lateral extent of impacted groundwater in the silty sand encountered at sixty-five feet <br /> below surface grade (bsg) EHD recommends that a minimum of three groundwater <br /> monitoring wells be installed to assess the lateral extent of impacted groundwater <br /> You are_hereby directed to submit a work plan by 28 April 2003 to conduct the necessary <br /> additional site characterization <br /> Construct monitoring wells at the site to assess the impact to groundwater resulting from <br /> the unauthorized release of fuel hydrocarbons on the site and establish the groundwater <br /> gradient Monitoring wells should be screened at an interval representative of the <br /> affected groundwater Groundwater samples should be analyzed quarterly for total <br /> petroleum hydrocarbons (TPH) as gasoline by Environmental Protection Agency (EPA) <br /> method 8015B, TPH as diesel by EPA method 8015B, benzene, toluene, ethylbenzene, <br /> and xylenes (BTEX) by EPA method 8021, and methyl tertiary-butyl ether(MTBE), <br /> tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary-butyl ether <br /> (ETBE), tertiary-amyl methyl ether(TAME), ethylene dibromide (EDB), 1,2- <br /> dichloroethane (1,2-DCA), ethanol, and methanol, by EPA method 8260B Quarterly <br /> monitoring should continue until further direction from EHD <br />