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I _ TABLE 2 ' ANALYTICAL RESULTS OF GROUND WATER SAMPLES ANALYZED BY EPA METHODS 8015 AND 8020/8260 FORMER STOCKTON PLATING FACILITY ' 632 South E1 Dorado, Stockton, California (µg11) ' Sample I D/ TPH as MTBE Benzene Toluene Ethyl- 'Total Date Gasoline benzene Xylenes ' MW5/04-29-97 450 17 9 8 12 2 3 31 MW5/06-27-97 470 15 92 18 3 1 3 8 MW5/09-08-97 300 16 91 092 2 4 23 MW5/12-12-97 240 <5 0 21 1 1 13 18 MW5/03-19-98 960 <50 210 4 7 15 28 MW5/06-19-98 130 <17 6 3 10 1 1 19 MWS/09-22-98 240 <30 3 9 22 49 21 MW5112-11-98 330 <10 61 52 13 57 ' MW5/03-24-99 680 <10 32 110 24 1110 MW5/06-23-99 <50 <5 0 <0 5 <0 5 <0 5 MW5/09-24-99 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW5/01-24-00 <50 <5 0 <0 5 <0 5 <0 5 <0 5 t MW5/06-16-00 <50 NA <0 5 <0 5 <0 5 <0 5 MW5/10-04-00 <50 NA <0 5 067 <0 5 <0 5 MW5/02-13-01 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW5/05-15-01 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW5/11-05-01 <50 56 <0 5 <0 5 <0 5 <0 5 MW5/01-28-02 <50 <5 0 <0 5 <0 5 <0 5 <0 5 MW5/06-26-02 <50 <5 0 <0 5 <0 5 <0 5 <0 5 ' MW5/09/25102 <50 NA <0 5 <0 5 <0 5 <0 5 MW6/12-11-98 75,000 <830 7,000 16,000 2,000 11,000 MW6/03-24-99 53,000 <700 4,400 9,900 1,300 9,200 MW6/06-23-99 38,000 <200 2,300 800 1,400 6,200 MW6/09-24-99 12,000 <33 520 1,000 700 2,000 MW6/01-25-00 12,000 <100 220 410 530 1,300 MW6/06-16-00 8,700 NA 60 180 400 890 ' MW6/10-04-00 5,500 NA 60 22 300 33 MW6/02-13-01 5,400 <5 0 16 55 55 380 MW6/05-15-01 2,900 <5 0 11 35 170 240 MW6111-05-01 2,100 <5 0 52 18 98 120 ' MW6101-2$-02 1,600 <5 0 21 94 59 56 MW6/06-26-02 3,800 <5 0 2 8 22 45 45 MW6109125/02 1,100 NA <0 5 1 1 1 11 15 1 ' Notes µg11 micrograms per]iter MTBE methyl tertiary butyl ether by EPA method 8020 NA Not analyzed Di-isopropyl Ether(DIPS) Ethyl tertiary-Butyl Ether(ETBE) Methyl-tertiary Butyl Ether(MTBE) tertiary-Amyl Methyl Ether(TAME) tertiary-Butanol(TBA) ' ethylenedibromide(EDB) 1,2 dichloroethan(1,2-DCA) Advanced GeoEnvironmental,Inc