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TABLE 1 <br /> GROUNDWATER MONITORING DATA <br /> Beacon Station No 12474 <br /> 3440 East Main Street,Stockton,California <br /> i <br /> ethyl- total Depth to TOC GW <br /> Well TPHmo TPHg benzene toluene benzenexylene MTBE DIPS ETBE TAME TBA methanolethanol DCA DBA GW Elevation Elevation <br /> Number Date u !L u !L (u !L u !L u IL u !L (u IL) (u IL) u 1L u lL) (u !L) (u IL u 1L) (u !L) (ug/L feet feet msl) feet msl Comments <br /> MW 1 12/15/99 <100 <50 <0 50 <0 50 27 <0 50 <50 na na na na na na na na 4453 2071 -2382 <br /> screened 05119100 <100 <50 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4119 2048 no comment <br /> interval 08131100 <100 60 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4435 -2364 no comment <br /> 40-60 11102!00 200 <50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <50 <50 16 <0 50 4639 2191 2448 no odortno sheen <br /> MW-2 12/15/99 na 610 <0 50 <0 50 <0 50 050 <5 0 na na na na na na 4541 2176 -2365 <br /> screened 05/19/00 na 300 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4213 2037 no Comment <br /> interval 08/31100 na 180 <0 50 <0 50 <0 50 <0 50 <50 na na na na na na na na 4579 -2403 no comment <br /> 40-60' 11/02100 na 280 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 12 <50 <5 0 160 <0 50 4622 2176 -2446 no ododno sheen <br /> MW-3 12115199 na 360 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na 4408 2038 -2370 <br /> screened 05/19/00 na 710 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4073 -2035 no comment <br /> interval 08/31/00 na 480 <0 50 <0 50 <0 50 <0 50 <5 0 na na na na na na na na 4438 -2400 no comment <br /> 40-60' 11!02100 na 310 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 26 <50 <5 0 160 <0 50 4483 2040 -2443 no odorino sheen <br /> Notes TPHmo=total petroleum hydrocarbons as motor oil DCA= 1 2 dichloroethane <=less than indicated reporting limit <br /> TPHg=total petroleum hydrocarbons as gasoline DBA=1 2 dibromoethane ns=not sampled <br /> MTBE=methyl ter[-butyl ether GW=groundwater nm=not measured <br /> DIPE=dnsopropyl ether TOC=top of casing <br /> ETBE=ethyl tent butyl ether msi=mean sea level <br /> TAME=tert-amyl methyl ether <br /> 474gmr90 As <br /> 147443 Page 1 of 1 HORIZON ENVIRONMENTAL.INC <br />