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. Quik Stop No 121 4-May-01 CCI Project No 12118-2 TABLE 2 SUMMARY OF MONITORING WELL GROUNDWATER SAMPLE ANALYSIS Quik Stop No 121,1196 West Louise Avenue,Manteca,CA Ethyl Total Sample Date TPHg Benzene Toluene Benzene Xylenes MTBE Number Sampled fug/1) (ug/1) (ugll) (ugll) (ug/1) (ug/1) MWA 4130/99 140 <0 5 <0 5 <0 5 <1 <1 7121199 <50 <0 5 <0 5 <0 5 <1 87 10118199 58 2 08 07 3 <1 1120100 8,6001' <50 <50 <50 <50 21,000 2!17100{' N R <1 <1 <1 <1 11,000 416100 3,100 <25 <25 <25 <25 5,700 715100 690" 084 <0 5 <0 5 <0 5 940 1015100 80011 <5 <5 <5 <5 1,000 1110!01 5,3001j <25 <25 <25 <25 11,000 4118101 170 <0 5 <0 5 <0 5 <1 13,000 MW-2 4130199 82 <0 5 <0 5 <0 5 <0 5 <1 7121199 <50 <05 <0 5 <0 5 <0 5 <1 10118199 <50 <05 <0 5 <0 5 <0 5 <1 1120100 200 22 <0 5 <0 5 <0 5 59 2!17100" N R <1 <1 <1 <1 3 416100 70 <05 <0 5 <0 5 <0 5 55 715100 <50 <0 5 <0 5 <0 5 <0 5 99 1015100 <50 <0 5 <05 <0 5 <0 5 <5 1110101 <50 <0 5 <05 <0 5 <0 5 <5 4118101 81 2 <05 <05 <1 29 j MW-3 4130199 <50 <0 5 1 1 4 <1 7121199 230 <0 5 3 <0 5 <1 12,000 10118199 400 2 1 08 5 <1 1120100 25,000'' <125 <125 <125 <125 58,000 2!17100(1 N R <1 <1 <1 <1 49,000 416100 16,000(" <100 <100 <100 <100 43,000 715100 55,000111' <100 I <100 <100 <100 52,000 1015100 94,0001' <0 5 <0 5 <0 5 <05 110,000 1110101 34,0001} <100 <100 <100 <100 110,000 4118101 460 11 <0 5 <0 5 2 1 98,000 BB-1 4118101 <50 <0 5 <05 <0 5 <1 <1 :L:J —t--, —Ed--.--- TPHg Total Petroleum Hydrocarbons as Gasoline Current Central Valley RWQCB Water Quality Goals ugh Micrograms per Liter Toluene 42 ppb < Below laboratory Detection Limit Ethyl Benzene 29 ppb N R Note Requested Xylenes 17 ppb MTBE Methyl-tertiary-butyl ether Benzene 1 ppb TPHg 5 ppb � Foot Notes Compliance 1 Results within quantitation range,chromatigraphic pattern not typical of fuel C1 s 2 Confirmation sampling Closure, Inc I