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Sent By: CVRt90CB; • 916 255 3164; Feb-14-00 16:18; Page 317 <br /> • <br /> .� California Regional Water Quality Control Board <br /> Central Valley Region 0 <br /> Steven T.Butler,Chair Gray nasiv <br /> wiuston H.Hickun (;a-ernor <br /> S""Wy Jor saaaaento Main Office <br /> Emvirnnme l lutemet AJJms= hitp:/rwww suwb o-aeW-rwgeb5 <br /> Prourn,m 3443 Rwhee Road Suite A.Sacamc+ito.C a ifomia 95827-3003 <br /> Phait(914)255-30W-FAX(916)255-3015 <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> CLEANUP AND ABATEMENT ORDER NO. <br /> FOR <br /> FLAG CITY CHEVRON <br /> 6421 CAPITOL AVENUE <br /> LODI, SAN JOAQUIN COUNTY <br /> The California Regional Water Quality Control Board, Central Valley Region, (hereafter Board) finds <br /> that: <br /> I. Mr. Richard Bokides (hereafter Discharger)owns and operates the Flag City Chevron located at <br /> 6421 Capitol Avenue in Lodi, California. The Flag City Chevron site was formerly named <br /> Saddle City Chevron #90302 operated by Mr. Cecil Dillon. <br /> 2. On 7 May 1993, the San Joaquin County Environmental Health Division(County) identified soil <br /> contamination at the subject site during the installation of a tank venting system. The Board <br /> received a notification of an Unauthorized Release from the County on 12 May 1993. The <br /> County notified the Discharger of the requirement to investigate the extent of contamination. <br /> 3. On 31 March 1995, five underground storage tanks(USTs)were removed and replaced at the <br /> site. Groundwater was encountered at approximately 8 feet below ground surface(bgs)in the <br /> excavations. Soil and groundwater samples were collected from the excavation and submitted <br /> for analysis of petroleum hydrocarbons. Soil samples were found to contain up to 1,500 mglkg <br /> of total petroleum hydrocarbons as gasoline(TPHg), 81 mg/kg of benzene, 140 mg/kg of toluene, <br /> 26 mg/kg of ethyl benzene, and 180 mg/kg of total xylenes. Groundwater samples were found to <br /> contain up to 18,000 µg/1 of TPHg, 1,400µg/1 of total petroleum hydrocarbons as diesel (rPHd), <br /> 230µg/1 of benzene.300 µg/1 of toluene, 160µg11 of ethyl benzene, and 860µg11 of xylenes. <br /> 4. In July 1996,three groundwater monitoring wells weresampled, and all samples were less than <br /> detection limits for TPHg,TPHd, and benzene,toluene, ethyl benzene, and xylenes(BTEX) <br /> constituents. Although TPH was non detect at the site, methyl-tertiary-butyl ether(MtBE)was <br /> identified at 310 µg11 in monitoring well MW-1, near the underground storage tanks(USTs). <br /> MtBE was also identified up to 3.7 µgA from the two nearby monitoring wells. <br /> 5. Subsequent soil and groundwater investigations were completed, and four additional monitoring <br /> wells were installed. Eight groundwater sampling events have been completed between July <br /> 1996 and June 1999. Groundwater samples were found to contain up to 480µg/1 of TPHg, <br /> 1,500µg11 of TPHd, less than detection limits for BTEX, and 16,000 ,u g/I of MtBE- <br /> ](060 <br /> California Environmental Protection Agency <br /> Reryded Puper <br />