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Table 1 -Groundwa&onttoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo(toad,Stockton,California <br /> Well Date TPHg B T E X MTBE DIPE ETBE TAME TBA Meth Eth Depth to TOC GW <br /> Number ag/L I ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L GW Elevation Elevation Comments <br /> MW-1 03/31/98 65 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4804 2111 -2693 <br /> 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4250 -21 39 <br /> 09/08/98 230 8 1 058 <0 50 072 <0 50 <0 50 <0 50 <0 50 170 <50 <5 0 4695 -2584 no odor/no sheen <br /> MW-2 03/31/98 94 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4826 2135 -2691 <br /> 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4267 -2132 <br /> 09/08/98 98 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 240 <50 <5 0 4731 -2596 no odor/no sheen <br /> MW-3 03/31/98 780 220 20 32 70 <5 0 na na na na na na 4827 2138 -2689 <br /> 06/10/98 220 26 1 8 06 18 <5 0 na na na na na na 4267 -2129 <br /> 09/08/98 3,800 420 180 260 280 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 4721 -2583 Petroleum odor/no sheen <br /> MW-4 03/31/98 75 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4792 2000 -2792 <br /> 06/10/98 58 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4221 -2221 <br /> 09/08/98 50 13 14 <0 50 2 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 4664 -2664 no odor/no sheen <br /> MW-5 03/31/98 75 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4846 2043 -2803 <br /> 06/10/98 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4272 -2229 <br /> 09/08/98 <50 12 091 <0 50 094 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 4692 -2649 no odor/no sheen <br /> MW-6 03/31/98 110 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4836 2066 -2770 <br /> 06/10/98 79 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4268 -2202 <br /> 09/08/98 <50 086 077 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <5 0 4697 -2631 no odor/no sheen <br /> Notes <br /> TPHg=total petroleum hydrocarbons as gasoline MTBE=methyl tertiary-butyl ether TBA=ternary butyl alcohol µg/L= micrograms per Mer=parts per billion(ppb) <br /> B=benzene DIPE=di-isopropyl ether Meth =methanol GW=Groundwater <br /> T=toluene ETBE=ethyl tertiary butyl ether Eth =ethanol TOC=Top Of Casing <br /> E=ethylbenzene TAME=tertiary amyl methyl ether na=not analyzed <br /> X=xylenes Depths and Elevations recorded in feet <br /> I <br /> i <br /> I <br /> I <br /> I <br /> 1 <br /> 98QM Table 1 Page 1 of I HORIZON ENVIRONMENTAL INC <br />