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JUN-13-2000 17 04 CAMBRIA 510 420 9170 R <br /> Table 1 - Groundwater Extraction System Analytical Results - Shell-branded Service Station <br /> 341 East Main Street,Ripon <br /> Sample Meter MTBE TBA <br /> Date Reading TPHS Benzene EPA 8260 EPA i)'0 <br /> (gallons) (Concentrations in ppb)--- <br /> Effluent <br /> 03/10/00 0 <50 <05 <1 ` <br /> 03113/00 1,100 <50 <0 5 <1 <g0 <br /> 03/15/00 16,905 <50 <0 5 <1 <50 <br /> 03/31/00 17,500 NA <05 <05 <50 <br /> 04102/00 17,500 <50 <0 5 <0 5 <50 <br /> 04/05/00 34,300 <50 <0 5 <0 5 <50 - Ow <br /> 04/07/00 51,700 <50 <05 <0 5 450 ` �- <br /> 04/28/00 51,700 <50 <05 <0 5 <20 <100 <br /> 05101100 64,200 <50 <0 5 <0 5 <20 <100 <br /> 05/19/00 64,200 <50 <0.5 <05 <20 <100 <br /> 05/26/00 134,000 <50 <0 5 <0 5 <20 <100 <br /> 06/01/00 190,600 <50 <0 5 <0 5 C20 <100 <br /> 06/08/00 242,500 X50 <0 5 <0 5 <20 <100 <br /> Abbreviations Notes- <br /> MTBE=Methyl teruary butyl ether <n=Below detection lutnt of n pnb <br /> TBA=tertiary Butyl Alcdhol ° laboratory noted that the resul,wc3 <br /> DIPS Di-Isopropyl ether a typical gasoline pattern <br /> ppb=Parts per billion °i=labor4wry detected toluene u' <br /> and at 0 60 ppb when vi.- .� <br /> laboratory detected xylcr cs <br /> rn sample R:Lby 8015bJ W2C <br />