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Table 2 Groundwater Analytical Results-Oxygenate Compounds Former Chevron Service Station#9-0557 139 South Center Street Stockton,California IE EXPLANATIONS; ANALYTICAL MEffTHOD: TBA=Tertiary butyl alcohol EPA Method 8260 fl6r Oxygenate Compounds MTBE=Methyl tertiary butyl ether RIPE=Di-isopropyl ether _ ETRE=Ethyl tertiary butyl ether TAME=Tertiary amyl methyl ether 1,2-DCA= 1,2-Dichloroethane EDB= 1,2-Dibromoethane (ppb)=Parts per billion - --=Not Analyzed I Laboratory report indicates Full Scan by EPA Method 8260 were less than the reporting limits; unless noted in table. z Laboratory report indicates Full Scan by EPA Method 8260 were less than the reporting limits; except for Isopropyl benzene at 39 ppb, n-Propylbenzene at 53 ppb, 1,3,5-Trimethylbenzene at 15 ppb, 1,2,4-Tri llethyibenzene at 5.4 ppb,sec-Butylbenzene at 6.7 ppb, p-Isopropyl toluene at 5.5 ppb,n-Butylbenzene at 9.7 ppb,and Naphthalene at 10 ppb,- 3F report indicates Full Scan by EPA Method 8260 were less than the reporting limits; except for isopropyl benzene at 27 ppb, n-ProPYlbenzene at 55 ppb, 1,3,5-Trimeth lbenzene at 180 ppb,tert-But)dllbenzene at 86 ppb, 1,2,4-Trimeth lbenzene at 580 ppb,and Naphthalene at 190 ppb. a Samples were collected for oxygenate compounds but request for analysis omitted on Chain of Custody. 5 Il - Data provided by Secor International,Inc. Samples were collected prior too initiation of ozone sparging(baseline samples). Wells were not purged prior to collection of samples. . b Data provided by Secor International,Inc. Wells were not purged prior to collection of samples. Change to data requested and provided by Secor International,Inc. - - I - I I 9-055 786843 8129105 -