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Table 2 Groundwater Sample Analytical Results 1717 South Center Street Stockton, California ' Monitonng Date Benzene Toluene Ethyl benzene I Xylenes I TPHg I TBA I MTBEI DIPS I ETBE TAME Well Concentrations m Micrograms per Liter MW-1 07/19/1999 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) NA NA NA NA NA 06/29/2000 150 430 50 260 1,300 ND(20) ND(5) ND(5) ND(5) ND(5) 10/12/2000 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) 01/16/2001 ND(0 5) 15 052 29 ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) 04/18/2001 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) ' 07/25/2001 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) MW-2 07/19/1999 20,000 38,000 2,800 15,000 120,000 NA NA NA NA NA 06/29/2000 15,000 22,000 2,100 11,000 70,000 110 92 84 ND(5) ND(5) 10/12/2000 15,000 24,000 4,000 23,000 130,000 180 20 75 ND(5) ND(5) 01/16/2001 16,000 31,000 3,500 18,000 110,000 95 15 11 ND(5) ND(5) 04/18/2001 14,000 25,000 3,000 16,000 98,000 45 66 71 ND(5) ND(5) 07/25/2001 13,000 28,000 3,200 17,000 91,000 48 13 87 ND(5) ND(5) MW-3 07/19/1999 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) NA NA NA NA NA 06/29/2000 170 510 64 320 1,600 ND(20) ND(5) ND(5) ND(5) ND(5) 10/12/2000 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) 01/16/2001 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) ' 04/18/2001 ND(0 5) ND(0 5) ND(0 5) ND(0 5) ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) 07/2512001 ND(0 5) 1 2 ND(0 5) 1 1 ND(50) ND(20) ND(5) ND(5) ND(5) ND(5) TPHg =Total Petroleum Hydrocarbons as Gasoline TBA= Tert Butanol MTBE = Methyl tert butyl Ether DIPE = Di isopropyl Ether ETBE = Ethyl tert butyl Ether TAME = TertAmylmethyl Ether ' NA= Sample Not Analyzed for this Compound ND= Not Detected at or Above the Laboratory Method Detection Limit Shown in Parentheses ' env/62400132/121382eg/protects/stockcent/gwelev/sheet2