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TABLE 4 ANALYTICAL RESULTS OF GROUND WATER SAMPLES by EPA Methods 8260/8020 PACIFIC PRIDE - SOUTH EL DORADO 3147 South El Dorado Street, Stockton, California (µg/1} Sample I.D. Sample MTBE DIPE ETBE TAME TBA 1,2-DCA EDB Methanol Ethanol Screen Interval Date EPAMethod'8260/8020 12-28-00 ND<50 ND<50 ND<50 ND<50 ND<250 1,200 ND<50 ND<10000 ND<2500 03-30-01 ND<30 ND<30 ND<30 ND<30 ND<150 890 ND<30 ND<6000 ND<1500 06-27-01 ND<10 ND<10 ND<10 ND<10 ND<50 830 ND<10 ND<5000 ND<500 09-26-01 ND<l0 ND<10 ND<10 ND<10 ND<50 570 ND<10 ND<5000 ND<500 12-20-01 ND<25 ND<25 ND<25 ND<25 ND<125 590 ND<25 ND<12500 ND<1250 03-01-02 ND<50 ND<50 ND<50 ND<50 ND<250 790 ND<50 ND<25000 ND<2500 06-03-02 ND<50 ND<50 ND<50 ND<50 ND<500 630 ND<50 ND<50000 ND<5000 12-02-02 ND<5 ND<5 ND<5 ND<5 83 480 ND<5 -- -- 03-20-03 ND<5 ND<5 ND<5 ND<5 58 280 ND<5 MW-7 -- - 20 to -7 ft 06-30-03 ND<33 ND<33 ND<33 ND<33 ND<330 510 ND<33 09-19-03 ND<l ND<1 ND<l ND<l ND<10 450 ND<0.5 11-12-03 ND<1 ND<1 ND<l ND<1 ND<10 660 ND<1 -- -- 03-31-04 ND<l ND<1 ND<1 ND<1 ND<10 240 ND<l -- . 06-17-04 ND<1 ND<l ND<1 ND<l ND<10 260 ND<0.5 -- -- 10-01-04 ND<1 ND<1 ND<1 82 ND<10 200 ND<0.5 -- -- 12-10-04 ND<1 ND<1 ND<1 30 ND<10 300 ND<0.5 -- -- 03-15-05 ND<1 ND<1 ND<l 13 ND<10 220 ND<0.5 -- -- 06-13-05 ND<1 ND<l ND<1 7.3 ND<10 49 ND<0.5 -- -- 09-23-05 ND<1 ND<l ND<1 410 ND<10 270 ND<0.5 1 09-19-03 ND<1 ND<l ND<1 ND<1 ND<10 ND<0.5 ND<0.5 -- -- 11-12-03 ND<1 ND 03-31-04 ND<1 ND<l ND<l ND<1 ND<10 ND<0.5 ND<0.5 -- -- 06-17-04 ND<l ND<1 ND<1 ND<l ND<10 ND<0.5 ND<0.5 MW-8A -- -- 65 to 8 ft 10-01-04 ND<l ND<1 ND<1 ND<1 ND<10 ND<0.5 ND<0.5 1240-04 ND<l ND<1 ND<1 ND<1 ND<10 ND<0.5 ND<0.5 03-15-05 -- -- -- -- -- -- -- -- 06-13-05 'ND<l ND<1 ND<1 ND<1 ND<10 ND<0.5 ND<0.5 -- -- 09-23-05 1 22 ND<1 ND<1 6.4 ND<l0 2.8 ND<0.5 -- -- Advanced GeoEnvironmental,Inc.