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Table la <br /> Groundwater Monitoring Data <br /> Beacon Station No.474 <br /> 3443 East Main Street,Stockton,California <br /> i <br /> Well Date MTBE DIPE ETBE TAME TBA Meth. Eth. EDC EDB <br /> ' <br /> Number ug/L ug/L ug/L ug/L ug/L ug/l ug/L ug/L ug/L Comments <br /> MW-9 03/31/98, <5.0 na na na na na reported as M W-1 A <br /> screen 06/10/98 <5.0 na na na na na reported as M W-1 A <br /> interval 09/08/98 <0.50 <0.50 <0.50 <0.50 <5.0 <5.0 no odor/no sheen <br /> 56'-76' 12/30/98 <0.50 na na na na na no odor/no sheen <br /> 03/25/99 <0.50 <0.50 <0.50 <0.50 <5.0 <5.0 no comment <br /> 06/03/99 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 5.3 <0.50 1 no comment <br /> VW-1 09/08/98 0.7 <0.50 <0.50 <0.50 <5.0 6.8 strong odor/no sheen <br /> screen 12/30/98 <1000 na na na na na Petrol. odor/no sheen <br /> 03/25/99 <5.0 <5.0 <5.0 <5.0 <50 <50 no comment <br /> 50'-65' 06/03/99 <5.0 <5.0 <5.0 <5.0 <50 <50 <50 140 520 no comment <br /> VW-4 09/08/98 1.4 <0.50 <0.50 <0.50 <5.0 <5.0 strong odor/no sheen <br /> screen 12/30/98 <100 na na <br /> ,. na na na Petrol. odor 1 no sheen <br /> 03/25/99 <5.0 <5.0 <5.0 <5.0 <50 <50 no comment <br /> 50'-65' 1 06/03/99 <0.50 <0.50 <0.50 <0.50 <5.0 <50 <5.0 1 930 120 no comment <br /> Notes: <br /> MTBE=methyl tertiary-butyl ether na=not analyzed <br /> DIPE`=di-iso oro I ether <br /> P PY ns=not sampled <br /> ETRE=ethyl tertiary butyl ether nm-not measured <br /> TAME=tertiary amyl methyl ether NM=Not Measured <br /> TBA,-tertiary butyl alcohol nc=not calculated <br /> Meth.=methanol <br /> Eth.•'ethanol <br /> Page 3 of 3 <br /> Ali • <br />