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CA RI <br /> Table 1.Groundwater Extraction System Permit Sampling Results,Former Shell Service Station,2575 Country Club Boulevard,Stockton,California <br /> Sample pH TPH Benzene Toluene Ethylbenzene Xylene MTBE DIPE ETBE TAME TBA <br /> Date Cone Cone Cone Cone Cone Conc Cone Conc Conc Cone <br /> (mmlddl ) ( b) (ppb) (P& (ppb) ( b) (ppb) (ppb) ( b) (ppb) (ppb) <br /> 06/11/04 74 <1'000 <0 50 <0 50 <0 50 <10 <0 50 <0 50 <0 50 <0 50 <50 <br /> 07/16/04 68 <1,000 <0 50 <0 50 <0 50 <10 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> Abbreviations&Netes <br /> TPH=Total petroleum hydrocarbons <br /> MTBE=Methyl tert-butyl ether <br /> DIPE=Di-Isopropyl Ether <br /> ETBE=Ethyl-t-butyl ether <br /> TAME=t-Amyl methyl ether <br /> TBA=t-Butanol <br /> Conc =Concentration <br /> ppb=parts per billion,equivalent to 999 <br /> pH analyzed by EPA Method 1501 <br /> TPH(hexane extractable=oil and grease)analyzed by EPA Method 1664 <br /> Benzene,toluene,ethylbenzene,xylenes,MTBE,DIPS,ETBE,TAME and TBA analyzed by EPA Method 8260 <br /> All results shown are for sum les collected from the effluent stream,grior to dcschu a to the sanitary sewer <br /> Page I of 1 <br /> 0783 <br />