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<br /> TABLE 4
<br /> ANALYTICAL RESULTS OF PUMP-AND-TREAT GRAB GROUND WATER SAMPLES
<br /> Chapin Brothers Investments, Inc
<br /> 1766 Monte Diablo Avenue, Stockton, California
<br /> EPA 8015M EPA 8020/8260
<br /> Sample I D Date Gallons Ethyl-TPH-g Benzene Toluene benzene Xylene MTBE
<br /> 04-24-02 15,264 15,000 1,300 160 78 2,800 <50
<br /> 07-15-02 553,558 4,700 `290 23 240 470 <50
<br /> 08-22-02 867,749 2,600 32 6 4 3 3 120 <50
<br /> 11-25-02 1,333,838 2,700 95 81 100 180 <25
<br /> Influent 12-10-02 1,592,885 3,600 46 77 58 290 <2 5
<br /> 12-27-02 1,677,237 -- -- -- -- --
<br /> 01-09-03 1,690,903 3,500 120 7 6 6 8 340 <2 5
<br /> 03-25-04 2,891,360 4,300 3 8 6 2 110 51 <0 5
<br /> 04-28-04 2,972,028 1,100 <0 5 <0 5 <0 5 21 <0 5
<br /> 10-28-04 3,449,597 1,900 5 0 <0 5 40 65 <0 5
<br /> 05-30-02 226,147 940 58 2 1 5 5 24 <5 0
<br /> 09-19-02 1,028,683 710 1 1 <0 5 <0 5 6 6 <5 0
<br /> 10-15-02 1,200,093 1,500 20 19 28 33 <17
<br /> 02-17-03 1,835,317 7,700 48 91 320 460 <25
<br /> 03-24-03 1,982,381 9,600 35 <12 750 640 <12
<br /> 04-15-03 2,139,002 2,900 15 41 50 260 --
<br /> 05-21-03 2,312,165 4,000 16 <5 0 150 300 --
<br /> EW-1 06-15-03 2,193,675* 6,700 32 8 8 610 470 —
<br /> 07-21-03 2,290,214 6,400 20 39 420 260 --
<br /> 08-19-03 2,374,652 930 8 3 4 5 3 3 2 6 120
<br /> 09-16-03 2,459,705 600 4 2 <0 5 <0 5 2 9 <0 5
<br /> 10-18-03 2,557,662 500 10 <0 5 4 2 5 5 <0 5
<br /> 11-17-03 2,566,681 320 15 14 78 5 7 100*
<br /> 11-24-03 2,579,560 410 12 8 9 41 77*
<br /> 12-15-03 2,709,959 910 95 3 9 3 4 2 7 42*
<br /> 01-26-04 2,820,731 1,800 4 4 <0 5 18 89 <0 5
<br /> Advanced GeoEnvironmental,Inc
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