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" JUN-01-2000 10 36 CAMBRIA 510 420 9170 P 02/13 CAMBRIA • Table 1-Groundwater Extraction System Analytical Results Shell-branded Service Station 341 East Main Street, Ripon Sample Meter MTBE TBA Ethanol Date Reading TPHg Benzene FPA 8260 EPA 8260 EPA 8260 allons Concentrations m b Influent 03110!00 0 <50 <0 5 24,900 <10,000 <50000 03/13/00 1,100 69* 6 34,000 <50 <200 03/15/00 16,905 <50 <0 5 18,000 <50 <200 03/31/00 17,500 NA <100 44,800 <40000 <200000 04/05/00 34,300 <5,000 <50 22,700 <10000 450000 04/07/00 51,700 45,000 <50 18,100 <10000 <50000 04/28/00 51,700 <2,500 <25 6,360 <4000 <50000 05/01/00 64,200 <2,500 Q5 4,880 <4000 <50000 05/19/00 64,200 <500 <5 3,150 <2,000 <1 0,000 05/26/00 134,000 --- --- - - - After First 1,000-lbs Carbon Filter Vessel 03/10100 0 <50 <05 <1 <20 <100 03/13100 1,100 <50 <0 5 81 <50 <200 03/15/00 16,905 450 <0 5 56 <50 <200 . 03/31/00 17,500 NA <05 122 <20 <100 04/05/00 34,300 <50 <0 5 0 779 <20 <100 04/07/00 51,700 <50 <05 <0 5 <20 <100 04/28/00 51,700 <50 <0 5 <0 5 <20 <100 05/01/00 64,200 <50 <05 <0 5 <20 <100 05/19/00 64,200 <50 <0 5 <0 5 <20 4100 05/26/00 134,000 --- --- - - - After Second 1,000-lbs Carbon Filter'Vessel 03/10/00 0 NA NA NA NA NA 03/13/00 1,100 <50 <05 <1 <50 <200 03115/00 16,905 <50 <0 5 <1 150 <200 03/31/00 17,500 NA <05 <0 5 <50 <100 04/05/00 34,300 <50 <05 <0 5 <50 <100 04/07/00 51,700 <50 <0 5** <0 5 <50 <100 04/28/00 51,700 <50 <0 5 <0 5 <20 <100 05/01/00 64,200 <50 <05 <0 5 <20 <100 05/19/00 64,200 <50 <05 <0 5 Q0 <100 05/26/00 134,000 --- --- --- --- ---