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TABLE 1 <br /> Groundwater Monitoring Data <br /> Former Beacon Station No 419 <br /> 2350 Waterloo Road,Stockton,California <br /> Depth to TOC GW <br /> well TPHg Benzene Toluene Ethylbenzene Xytenes GW Elevation Elevation <br /> Number (Date (u) u 1L ( ) u ) (feet) (feet sea level) feet sea level) Comments <br /> VW-1 03/26/99 260000 3000 1800 9100 44000 4158 nm nm no ododno sheen <br /> (screened 06!02!99 84000 2000 56000 5400 26000 40 92 nm slight ododno sheen <br /> interval= 08131)J99 no ns ns ns ns dry nm Well dry at 43 9 feet <br /> 34 44') 12109/99 ns ns ns ns no dry nm dry <br /> 07121/00 ns ns ns ns no dry nm dry <br /> 05M8= ns no. no ns ns dry <br /> VW-2 03/16/99 ns no ns ns ns dry nm nm Well dry at 24 0 feet <br /> (screened OVUM ns no ns no no dry nm slight odor/no sheen <br /> Interval= 08/31199 ns no ns no ns dry nm dry <br /> 15' 25') 12109199 ns ns ns no no. dry nm dry <br /> 02/21/00 ns ns ns no ns dry nm dry <br /> 05/18/00 no ns ns no no dry nm dry <br /> AS-1 02121!00 80000 7600 16000 1600 9100 4589 nm nm slight odorino sheen <br /> (screened 05116/00 23000 2300 4800 480 2900 41 09 nm no odorino sheen <br /> interval= <br /> 64-691 <br /> !dotes TPHg=total petroleum hydrocarbons as gasoline t&IL= micrograms per titer=pans per bion(ppb) <br /> GW=groundwater nm=not measured <br /> TOC=top of casing na=not analyzed <br /> =Iems than atyptod repot hma ns=not sampled <br /> 419ge VWjds Page 4 of 4 HORIZON ENVIRONMENTAL INC <br /> 41941 <br />