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� • <br /> CAMBRIAi <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 D[PE ETBE TAME TBA <br /> Date Cone Cone Cone Conc Cone Conc Cone Cone Cone Conc <br /> (mm/dd/yy) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (ppb) (pph) <br /> 06/11/04 7 4 <1 000 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <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 /> 11117/04 96 <l 000 4 50 4 50 <0 50 <}0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 12/06/04 70 <1000 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 01/28!05 67 <1 000 <0 50 <0 50 <0 50 <1 0 4)50 <0 50 <0 50 <0 50 <5 0 <br /> 02/08/05 70 <2 000 <0 50 <0 50 <0 50 <10 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> j03/30/05 71 <2 000 <0 50 <0 50 <0 50 <i 0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 04!14/05 70 <2 000 <0 50 <0 50 <0 50 <i 0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 05/16/05 668 <1 000 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 06/17/05 70 <2 000 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 07/11/05 7 2 <2 000 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <5 0 <br /> 08/08/05 6 53 <2,000 <0 50 <0 50 <0 50 <1 0 <0 50 <0 50 <0 50 <0 50 <50 <br /> Abbreviations&Notes <br /> TPH=Total petroleum hydrocarbons <br /> MTBE=Methyl len butyl ether <br /> D1PE=Di Isopropyl Ether <br /> ETBE=FAhyl t butyl ether <br /> TAME=t Amyl methyl ether <br /> TBA=t Butanol <br /> Cone =Concentrauon <br /> ppb=parts per billion equivalent to pg/1 <br /> pH analyzed by EPA Method 150 1 <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 samples collected from the effluent stream,prior to discharge to the sacutary sewer <br /> Page 1 of 1 <br /> 0783 <br />