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MW M M M M M- M TABLE 4 CUMULATIVE ANALYTICAL RESULTS - GROUNDWATER Stockton Metropolitan Airport, Former Fuel Farm OXYGENATES " SAMPLE DATE TPH- ETHYL- LOCATION SAMPLED JET FUEL TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPE ETBE TAME TBA SB-3 01/03/96 460 750 29 15 12 so 12 NA NA NA NA SBS 01104/96 8,500 18,000 710 95 1,100 2,400 ND-c500 NA NA NA NA MW-1 11126/02 840 7,700 1,300 460 490 670 ND<5 ND<5 ND<S ND<5 N10<50 03/07/03 120 7,300 1,600 38 170 180 ND<5 ND<5 ND<5 ND<5 ND<50 06/06/03 ND<250 3,900 700 11 110 58 ND<5 ND<5 ND<5 ND<5 ND<50 09115!03 140 6,600 2,100 77 130 29 ND<5 ND<5 ND<5 ND<5 ND<50 12119103 ND<50 5,400 21300 ND<20 140 51 ND<5 ND<5 ND<5 ND<5 ND<50 03125!04 59* 9,900 2,600 44 110 50 ND<5 ND<5 ND<5 ND<5 ND<50 MW-2 11/26/02 340 420 ND<0 5 ND<O 5 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<0 5 1113<0 5 18 03/07/03 ND<5D 220 ND<O 5 ND<O 5 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<O 5 ND<O 5 ND<5 06/06/03 ND<250 240 11 1 8 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<O 5 ND<0 5 22 09/15/03 ND<50 110 55 1 0 05 ND<1 ND<O 5 ND<O 5 ND<0 5 ND<0 5 ND<5 12/19/03 ND<50 110 73 ND<0 5 1 3 1 2 ND<0 5 ND<O 5 ND<0 5 ND<O 5 ND<5 03/25/04 ND<50 110 40 ND<O 5 ND<O 5 ND<1 ND<O 5 ND<O 5 ND<0 5 ND<O 5 ND<5 MW-3 11126102 490 1,400 ND<0 5 ND<O 5 ND<O 5 ND<1 ND<O 5 36 ND<O 5 ND<O 5 28 03107/03 ND<50 1,700 18 ND<O 5 054 30 ND<0 5 39 ND<O 5 ND<O 5 ND<5 06/06/03 ND<250 1,800 50 92 1 1 30 ND<O 5 37 ND<O 5 ND<0 5 ND<5 09/15/03 54 2,100 1 55 62 33 32 ND<O 5 56 ND<O 5 ND<0 5 44 12/19/03 ND<50 240 14 06 10 11 ND<O 5 06 ND<O 5 ND<O 5 99 03125/04 NS NS NS NS NS NS NS NS NS NS NS 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 TPH-as-Gasoline(TPH-G)and benzene,toluene ethylbenzene xylenes(BTEX)analyzed by EPA Method 8020/8015M or 8260B Oxygenates methyl-t-butyl ether(MTBE) di-isopropyl ether(DIPE),ethyl t-butyl ether(ETRE) Cert-amyl methyl ether(TAME)and tert-butanol(TBA)analyzed by EPA Method 8260B MTBE analyses on SB 3 and S134 samples by EPA Method 8020 * The sample chromatogram does not match the standard Jet Fuel chromatogram AJI peaks were integrated within the Jet Fuel range The result is an estimated value ND<5=Not Detected at reporting limit of 5 ppb NA =Not analyzed for specified compound NS =Not sampled due to parked car over the well