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Quik Stop No 12i � 14-Oct-0O CCI Project No 12118-2 TABLE 2 MONITORING WELL WATER SAMPLE ANALYSIS Quik Stop No 121,1196 West Louis Avenue Manteca,CA Ethyl Total Sample Date TPHg Benzene Toluene Benzene Xylenes MTBE t-AME Number Sampled (u 11) (ug") (ugll) (ugll) (ug/1) (ug11) (ug/1) MW-1 4130199 140 <0 5 <0 5 405 <1 <1 <1 7121199 <50 <0 5 <0 5 <0 5 <1 87 <1 10118/99 58 2 08 07 3 <1 <1 1120100 8,600111 <50 <50 <50 <50 21,000 N R 2117100 N R <1 <1 <1 <1 11,000 N R 416100 1100 <25 <25 <25 <25 5,700 N R 715100 690 0 84 <0 5 <0 5 <0 5 940 <100 1015100 800 <5 <5 <5 <5 1,000 <100 MW-2 4130199 82 <0 5 <0 5 <0 5 <0 5 <1 <1 7121199 <50 <0 5 <0 5 <0 5 <0 5 <1 <1 10118199 <50 <0 5 <0 5 <0 5 <0 5 <1 <1 1120100 200 22 <0 5 <0 5 <0 5 59 N R 2117100 N R <1 <1 <1 <1 3 N R 416100 70 <0 5 <0 5 <0 5 <0 5 55 N R 715100 <50 <0 5 <0 5 <0 5 <0 5 9 9 <5 1015100 <50 <0 5 <0 5 <0 5 <0 5 <5 <5 MW-3 4130199 <50 <0 5 1 1 4 <1 <1 7121199 230 <0 5 3 <0 5 <1 12,000 <100 10/18/99 400 2 1 08 5 <1 <1 1120100 25,000 <125 4125 <125 <125 58,000 NR 2117100 N R <1 <1 <1 <1 49,000 NR 416100 16,000 <100 <100 <100 <100 43,000 N R 715100 55,000 <100 <100 <100 <100 52,000 <2 500 1015100 —W'0-00—W <0 5 <0 5 <0 5 <0 5 110,000 <5,000 BB-1 4130199 <50 <0 5 <0 5 <0 5 <1 <1 <1 7121199 <50 <0 5 <0 5 <0 5 <1 N R N R 10118199 <50 <0 5 <0 5 <0 5 <1 N R N R 1120100 <50 <0 5 <0 5 <0 5 <1 N R N R 2117100 NR NR NR NR NR NR NR 416100 <50 <05 <0 5 <05 <0 5 N R N R 715100 NR NR NR NR NR NR NR 1015100 NR NR NR NR NR NR NR t-AME t-Amyl Methyl Ether TPHg Total Petroleum Hydrocarbons as Gasoline Current Central Valley RWQCB Water Quality Goals ugll 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 1 Results within quantitation range chromatigraphic pattern not typical of fuel 2 Confirmation sampling Compliance (3 Closure, Inc.