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CUMULATIVE ANALYTICAL RESULTS -GROUNDWATER MONITORING WELLS Stockton Metropolitan Airport, Former Fuel Farm OXYGENATES SAMPLE DATE TPH- ETHYL- LOCATION SAMPLED JET FUEL TPH-D TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPE I ETBE TAME TBA 1,2-DCA EDB MVV-8 06/27/07 ND<250 NA ND<50 ND<0.5 ND<0.5 NE-0 5 ND<1 ND<0 5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 09/28/07 ND<250 NA ND<50 140<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 140<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 12/13/07 ND<250 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 03/10/08 ND<250 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND-0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 06/05/08 ND<250 NA ND<50 ND<0 5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 09/04/08 ND<250 NA ND<50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<O 5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 10/29/08 ND<250 NA ND<50 ND<0 5 ND<0.5 ND<0.5 ND<1 ND<0 5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 01/29/09 ND<250 ND<50 ND-50 ND<0.5 ND<0.5 ND<0.5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 ND<0.5 04/16/09 NOT SAMPLED-WELL SAMPLED ANNUALLY 10/28/09 NOT SAMPLED-WELL SAMPLED ANNUALLY 05/14/10 ND1250 ND<50 ND<50 ND<0.5 ND<0.5 1 ND<0.5 I ND<1 ND<0 5 ND<0.5 ND<0.5 ND<0.5 ND<5 ND<0.5 NA 11/23/10 NOT SAMPLED-WELL SAMPLED ANNUALLY 05/03/11 ND<250 NE-50 ND<50 ND<0.5 ND10.5 ND10 5 ND<1 ND<0 5 ND10.5 ND<0.5 N=ND ND<0.5 NA 04/19/13 ND<250 ND150 ND<50 ND10.5 ND<0.5 ND<0 5 ND<1 ND<0.5 ND<0.5 ND<0.5 ND<0.5 I ND<5 ND<0.5 ND<0.5 11/01/13 NOT SAMPLED-WELL SAMPLED ANNUALLY 04/16/14 N0<250 ND150 ND<50 ND<0.5 ND<0.5 I ND<0.5 ND<1 11 ND<05 ND<0.5 ND<0.5 I ND<0.5 ND<1 IL ND<0.5 NA NOTES: All results are reported in micrograms per liter(ug/1),which translates to parts per billion(ppb) Total Petroleum Hydrocarbons(TPH)-as-Jet Fuel and TPH-as-Diesel(TPH-D)analyzed by EPA Method 8015M TPH-as-Gasoline(TPH-G)and benzene, toluene,ethylbenzene,xylenes(BTEX)analyzed by EPA Method 8021 B/8015M or 8260B Oxygenates. methyl-t-butyl ether(MTBE).di-isopropyl ether(DIPE),ethyl-t-butyl ether(ETBE),tert-amyl methyl ether(TAME)and tent-butanol(TBA)analyzed by EPA Method 82608 1,2-Dichloroethane(1,2-DCA)and 1,2-Dibromoethane(EDB)analyzed by EPA Method 8260B The sample chromatogram does not match the standard Jet Fuel chromatogram. All peaks were integrated within the Jet Fuel range. The result is an estimated value. The sample chromatogram does not match the standard gasoline chromatogram. The result is an estimated value. Result elevated due to presence of single analyte peak(s)in the quantitation range. ND<5=Not Detected at reporting limit of 5 ug/I NA =Not analyzed for specified compound NS =Not sampled due to parked vehicle over the well. 6of6