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E <br /> Groundwater Analytical As-Oxygenate Compounds <br /> Chevron Service Station#9-0557 ` <br /> 139 South Center Street <br /> Stockton,California <br /> EXPLANATIONS: ANALYTICAL MEIUQQ: <br /> TBA=Tertiary butyl alcohol EPA Method 8260 for Oxygenate Compounds <br /> MTBE=Methyl tertiary butyl ether <br /> D1PE=Di-isopropyl ether <br /> ETBE=Ethyl tertiary butyl ether <br /> TAME=Tertiary amyl methyl ether <br /> 1,2-DCA= 1,2-Dichloroethane <br /> EDB= 1,2-Dibromoethane <br /> (ppb)=Parts per billion <br /> =Not Analyzed <br /> Laboratory report indicates Full Scan by EPA Method 8260 were less than the reporting limits; unless noted in table. <br /> z Laboratory report indicates Full Scan by EPA Method 8260 were less than the reporting limits; except for Isopropyl benzene at 39 ppb, <br /> n-Propylbenzene at 53 ppb, 1,3,5-Trimethylbenzene at 15 ppb, 1,2,4-Trim ethyl benzene at 5.4 ppb,sec-Butylbenzene at 6.7 ppb, <br /> p-Isopropyltoluene at 5.5 ppb,n-Butylbenzene at 9.7 ppb,and Naphthalene at 10 ppb. <br /> 3 Laboratory report indicates Full Scan by EPA Method 8260 were less than the reporting limits; except for Isopropyl benzene at 27 ppb, <br /> n-Propylbenzene at 55 ppb, 1,3,5-Trimethylbenzene at 180 ppb,tert-Butylbenzene at 86 ppb, 1,2,4-Trimethylbenzene at 580 ppb,and <br /> Naphthalene at 190 ppb. <br /> ° Samples were collected for oxygenate compounds but request for analysis omitted on Chain of Custody. <br /> 5 Data provided by Seeor International,Inc. Samples were collected prior to initiation of ozone sparging(baseline samples). Wells were not purged <br /> prior to collection of samples. <br /> 9-0557.xls/#386843 23 As of 04/16/02 <br />