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s. <br /> Tawe 4 <br /> Fuel Oxygenates Analytical Data <br /> Tosco(Former BP) Station No. 11193 <br /> 3202 W. Hammer Lane, Stockton, California <br /> Well Date of MtBE DIPE EtBE TAME EDC EDB TBA Methanol Ethanol <br /> ID Sampling (ug/L) (ug/L) (ug/t-) (ug/L) (ug/L) (uglL) (ug/L) (ug/L) (ug/L) <br /> MW-2R 7/14/2000 31,000 2 18 69 ND<1.0 ND<1.0 --- 6,300 ND<1000 <br /> 10/27/2000 130,000 ND<2000 ND<2000 ND<2000 ND<2000 ND<2000 48,000 100,00P ND<1000 <br /> 7/29/2002 9,590 ND<2.0[1] 16[1] 13[1] ND<1.0[1] ND<1.0[1] 28,000[1] --- --- <br /> 9/11/2002 11,000 ND<250 ND<250 ND<250 ND<250 ND<250 42,000 --- ND<20,000 <br /> 4/7/2003 160 ND<10 ND<10 ND<10 ND<10 ND<10 8,200 --- ND<2,500 <br /> 6/27/2003 340 ND<20 ND<20 ND<20 ND<20 ND<20 33,000 — ND<5,000 <br /> VW-1 10/27/2000 190,000 ND<2000 ND<2000 ND<2000 ND<2000 ND<2000 64000 50,000 ND<1000 <br /> 7/29/2002 33,900 ND<400[1] ND<400[i] ND<400[i] ND<200[i] ND<200[1] 71,000[1] --- <br /> 9/11/2002 55,000 ND<500 ND<500 ND<500 ND<500 ND<500 93,000 --- ND<40,000 <br /> 4/7/2003 220 ND<20 21 ND<20 ND<20 ND<20 30,000 --- ND<5,000 <br /> 6/27/2003 380 ND<40 ND<40 ND<40 ND<40 ND<40 90,000 — ND<10,000 <br /> Notes: <br /> _ x <br /> [1] Analysis conducted beyond EPA recommended hold time. <br /> [2] Lab reports significant headspace in the VOA vial. <br /> Analysis conducted in excess of EPA recommended hold time. <br /> MEBE Methyl tertiary butyl ether <br /> DIPE Di-Isopropyl Ether <br /> EDB 1,2-Dibromoethane or Ethylene Dibromide <br /> EDC 1,2-Dichloroethane t <br /> EtBE Ethyl tertiary Butyl Ether <br /> TBA tertiary Butyl Alcohol <br /> I:IConocoPhill ipslTosco Marketing1111931Tablesli 1193 20MR03.xls Page 3 of 3 <br />