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Table 2 Fuel Oxygenates Analytical Data BP Oil Site No 11191 1469 West Hammer Lane, Stockton, CA Well DATE OF MtBE TBA TAME RIPE ETBE 1,2-DCA EDB Ethanol ID SAMPLING (pglL) (11191L) (11191L) (ug1L) (pg1L) (ug1L) (►9fL) (Frg1L) I MW-5 4/10/2003 1,900 -- — — — --- --- — 7/11/2003 3,000 -- — — -- --- — <10,000 10/17/2003 3,600 <2,000 <100 <100 <100 -- -- <10,000 MW-6 4/10/2003 < ..-- — — -_ — — --- 7/11/2003 <0 5 — -- --- --- --- — <100 10/1712003 <0 5 <20 <1 0 <1 0 <1 0 -- --- <100 MW-7 4/10/2003 < — — — _ — — 7/11/2003 <0 5 — -- --- --- --- -- <100 10/17/2003 <0 5 <20 <1 9 <1 0 <1 0 — --- <100 i ABBREVIATIONS -- = Not analyzed/applicable/measurable MtBE = Methyl tert-butyl ether 1,2-DCA = 1,2-Dichloroethane TAME = tert-amyl methyl ether DIPS = Di-isopropyl ether TBA = Tert-butyl alcohol EDB = 1,2-Dibromoethane ug/L = Micrograms per liter ETBE = Ethyl tent-butyl ether Data Qualifier Definitions U The analyte was analyzed for,but was not detected above the sample reporting limit J The analyte was positively identified,the associated numerical value is the approximate concentration of the analyte in the sample N The analysis indicates the presence of an analyte for which there is presumptive evidence to make a"tentative identification" NJ The analysis indicates the presence of an analyte that has been"tentatively identified"and the associated numerical value represents its approximate concentration UJ The analyte was not detected above the reported sample reporting limit However,the reported reporting limit is approximate and mayor may not represent the actual limit of quantitation necessary to accurately and precisely measure the analyte in the sample R The sample results are rejected due to identification or other analytical issues ND Not detected above reported detection limit k U5 SP ARM111911QuarterlM QTR 03111191 GWMR 4003