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<br /> t" TABLE 4
<br /> GROUNDWATER ANALYTICAL RESULTS
<br /> EPA METHOD 8260B
<br /> . Speedy Mart, 8200 N. Highway 99, Stockton, CA
<br /> Page I of 4
<br /> (results in ppb)
<br /> Sample ID Date MTBE DIPS ETRE TAME TBA Ethanol Methanol 1,2-DCA EDB
<br /> MW1 10/12/99 44,000 <100 <100 180 <1,000 NA NA NA NA
<br /> 06/13/00 5,500 <100 <100 <100 <1,000 <5,000 <10,000 <100 <100
<br /> 09/28/00 3,900 <500 <500 <500 <5,000 <25,000 <50,000 <500 <500
<br /> 02/05/01 12,000 <200 <200 <200 <2,000 <25,000 <50,000 <200 <200
<br /> 05/18/01 18,000 <400 <400 <400 <4,000 <50,000 <100,000 <400 1 <400
<br /> 08/15101- Not Sampled- Free Product Present
<br /> 03/12/03
<br /> 06/18/03 28,000 <20 <20 45 <200 <1,000 <2,500 <20 <20
<br /> MW2 10/12/99 61 <5 0 <5 0 <5 0 <50 NA NA NA NA
<br /> 06/13/00 <5 0 <5 0 <5 0 <5 0 <50 <250 <500 <5 0 <5 0
<br /> 09/28/00 <5 0 <5 0 <5 0 <5 0 <50 <250 <500 <5 0 <50
<br /> 02/05/01 <2 0 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 05/17/01 <2 0 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 08/15/01 70 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 11/20/01 62 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 03/21/02 <2 0 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 06/13/02 1 16 <2 0 <2 0 <2 0 1 <20 <250 <500 <2 0 <2 0
<br /> 09/12/02 460 <20 <20 <20 <200 <250 <500 <20 <20
<br /> 12/11/02 230 <2 0 <2 0 <2 0 <20 <100 <250 <2 0 <2 0
<br /> 03/12/03 150 <2 0 <2 0 <2 0 <20 <100 <250 <2 0 <2 0
<br /> 06/18/03 170 <0 5 <0 5 <0 5 <50 <100 <250 <0 5 <05
<br /> 09/10/03 810 <10 <10 <10 <100 -- -- I <10 <10
<br /> MW3 10/12/99 39,000 <200 <200 <200 <2,000 NA NA NA NA
<br /> 06/13/00 2,800 <50 <50 <50 <500 <2,500 <5,000 <50 <50
<br /> 09/28/00 7,500 <50 <50 <50 <500 <2,500 <5,000 <50 <50
<br /> 02/05/01 7,300 <40 <40 <40 <400 <5,000 <10,000 <40 <40
<br /> 05/18/01 1,100 <5 0 <5 0 <5 0 <50 <625 <1,250 <5 0 <5 0
<br /> 08/16/01 2,000 <100 <100 <100 <1,000 <12,500 <25,000 <100 <100
<br /> 11/21/01 4,900 <100 <100 <100 <1,000 <12,600 <25,000 <100 <100
<br /> 03/21/02 740 <10 <10 <10 <100 <2,500 <5,000 <10 <10
<br /> 06/13/02 4,100 <2 0 <2 0 <2 0 <20 <250 <500 <2 0 <2 0
<br /> 09/12/02 15,000 <100 <100 <100 <1,000 <12,500 <25,000 <100 <100
<br /> 12/12/02 12,000 <200 <200 <200 <2,000 <1,000 <2,500 <200 <200
<br /> 03/13/03 7,900 <40 <40 <40 <400 <1,000 <2,500 <40 <40
<br /> 08/18/03 6,600 <200 <200 <200 <2,000 <10,000 <25,000 <200 <200
<br /> 09/11/03 4,400 -<12--L-<40 <40 <400 -- -- <40 <40
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