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<br /> TABLE 4
<br /> Analytical Results of Pump-and-Treat Grab Ground Water Samples (µg/1)
<br /> Chapin Bros , Inc - 1766 Monte Diablo Avenue, Stockton, California
<br /> EPA 8015M EPA 8020/8260
<br /> Sample I DDatc gallons >rtz 1
<br /> -
<br /> TP1I-g TPH-d Benzene Toluene benzene Xylene MTBE
<br /> Pre Remediation-after settling tank
<br /> Influent 04-24-02 15,264 15,000 1,300 160 78 2,800 <50
<br /> Influent 07-15-02 553,558 4,700 290 23 240 470 <50
<br /> Influent 08-22-02 867,749 2,600 -- 32 64 3 3 120 <50
<br /> Influent 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 /> Influent 12-27-02 1,677,237 -- 1,700 -- -- -- -- --
<br /> Influent 01-09-03 1,690,903 3 500 - 120 7 6 6 8 340 <2 5
<br /> Pre Remediation-wells
<br /> EW-1 05-30-02 226,147 940 -- 58 2 1 55 24 <5 0
<br /> EW-1 09-19-02 1,028,683 710 -- 1 1 <0 5 <0 5 66 <5 0
<br /> EW-1 10-15-02 1,200,093 1,500 -- 20 19 2 8 33 <17
<br /> EW-1 02-17-03 1,835,317 7,700 -- 48 91 320 460 <25
<br /> EW-1 03-24-03 1,982,381 9,600 -- 35 <12 750 640 <12
<br /> EW-1 04-15-03 2,139,002 2,900 -- 15 41 50 260 --
<br /> EW-2 05-30-02 226,147 6,800 -- 300 23 270 170 <50
<br /> EW-2 09-19-02 1,028,683 8,100 -- 320 31 130 490 <100
<br /> EW-2 10-15-02 1,200,093 6,100 -- 280 21 370 390 <50
<br /> EW-2 02-17-03 1,835,317 6,100 -- 210 18 140 180 <50
<br /> EW-2 03-24-03 1,982,381 4,900 -- 150 9 5 160 160 <5 0
<br /> EW-2 04-15-03 2,139,002 2,200 -- 58 24 6 8 55 --
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