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' TABLE 4 <br /> HISTORICAL ANALYTICAL RESULTS OF GROUND WATER SAMPLES <br /> ' EPA METHODS 8015M/8020/8021B <br /> Formcr Chase Chevrolet(Madison)Facility <br /> 423 North Madison Street, Stockton,California <br /> ' Sam& Depth <br /> Ethyl- <br /> Location Sample to TPH-9 TPH-d TPH-mo MTBE Benzene Toluene k <br /> ylene <br /> Date benzene <br /> screen Water <br /> ' MW-21B 08-12-98 1504 2,600 1,600 <250 NA 20 35 67 27 <br /> (48-53) 11-03-98 1644 2,200 1,600 320 <5 0 12 12 49 26 <br /> 02-02-99 1587 1,300 1,200 <250 <50 80 <0 5 49 13 <br /> 05-05-99 I S 66 1,300 700 <250 <5 0 8 6 17 29 28 <br /> 08-11-99 1582 1,400 700 <250 <50 <1 15 16 116 <br /> 11-09-99 1670 <50 <50 <250 <50 <05 <0 5 <05 <05 <br /> 02-08-00 1567 800 460 330 60 24 <0 5 41 16 <br /> 05-10-00 1425 1,400 920 360 <50 <05 <0 5 11 63 <br /> 08-21-00 1425 1,200 1,100 <250 <50 <05 <0 5 11 056 <br /> ' 11-28-00 1612 130 360 <250 <50 <01 <0 5 1 1 39 <br /> 02-28-01 1575 650' 270 <250 <50 <05 <0 5 058 <05 <br /> 05-21-01 1583 930 630 <250 <50 <05 <0 5 057 <0 5 <br /> 08-16-01 1671 680 1,100 250 <50 <05 <0 5 052 <0 5 <br /> 11-14-01 1775 860 420 <250 <50 <05 <0 5 1 1 <05 <br /> 02-13-02 1670 700 620 <250 <20 <0 5 30 <05 <0 5 <br /> 05-16-02 16 91 750, 260 <250 <50 <05 <0 5 075 45 <br /> 09-30-02 1811 NS NS NS NS NS NS NS NS <br /> 12-02-02 1831 NS NS NS NS NS NS NS NS <br /> 02-21-03 1784 NS NS NS NS NS NS NS NS <br /> 05-08-03 1767 830 430 <250 NA <05 <0 5 <05 75 <br /> 08-07-03 1902 NS NS NS NS NS NS NS NS n <br /> 10-30-03 1 1856 1 620 1 620 <250 <50 <05 1 <05 1 075 1 18 <br /> ' <br /> MW-25 08-07-0319 96 <50 <50 NA <50 <05 <0 5 <05 <05 <br /> 10-30-03 1 1996 <50 L <50 <250 <50 <05 <0 5 <05 <0 5 <br /> Notes <br /> µg/1 micrograms per Mer <br /> TPH g Total Petroleum Hydrocarbons quantified as gasoline <br /> TPH-d Total Petroleum Hydrocarbons quantified as diesel <br /> TPH mo Total Petroleum Hydrocarbons quantified as motor oil <br /> .NS Not sampled <br /> NA Not analyzed <br /> ' 10-30.03 Samples identified as M\'V-19A/B appear to have been collected from wells MW-21A/B <br /> 1 i , <br /> • ' � 1 Y <br /> Advanced GeoEnvironmental,Inc' <br />