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�2 <br /> Groundwater Analytical TR -Oxygenate Compounds <br /> Tocso(Former BP)Service Station#11192 <br /> 1403 Country Club Boulevard <br /> Stockton,California <br /> ANALYTICAL METHODS' <br /> EXPLANATIONS: <br /> EPA Method 8260 for Oxygenate Compounds <br /> TBA=Tertiary butyl alcohol EPA Method 8015(Modified)for Methanol <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=Ethylene dibromide/1,2-Dibromoethane <br /> (ppb)=Parts per billion <br /> --=Not Analyzed <br /> ' Laboratory report indicates Acetone at<20 ppb and tentatively identified compounds(using GC/MS),ted-Butyl acetate at<20 ppb,and tert-Butyl formate at<20 ppb <br /> 2 Additional analysis by EPA Method 8260 <br /> J Laboratory report indicates Acetone at<1,200 ppb,tent-Butyl acetate at<1,200 ppb,and tert-Butyl formate at<1,200 ppb <br /> 4 Laboratory report indicates Acetone at<500 ppb,tert-Butyl acetate at<500 ppb,and tert-Butyl formate at<500 ppb <br /> s Laboratory report indicates the concentration indicated for this analyte is an estimated value above the calibration range of the instrument <br /> I <br /> 11192 xls/#180288 17 As of 01/03/03 <br />