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TABLE 2 GROUND WATER ANALYTICAL RESULTS BEACON STATION#474 3440 EAST MAIN AVENUE,STOCKTON,CALIFORNIA (All results in micrograms per Liter) Monitoring Date Total Aromatic Volatile Organics Well Collected Petroleum Hydrocarbons Gasoline MTBE' Benzene Toluene Ethyl- Total benzenc Xylenes MW-1 12/14/93 71 <0.5 <0.5 <0.5 L3 03/29/94 <50 <0.5 <0,5 <0.5 <0.5 06/21/94 <50 <0.5 <0.5 <0.5 <0.5 09/20/94 NS NS NS NS NS 12/23/94 57 <0.5 <0.5 <0.5 <0.5 03/13/95 <50 <0.5 <0.5 <0.5 <0.5 06/20/95 <50 <0.5 <0.5 <0.5 <0.5 09/17/95 <50 <0.50 <0.50 <0.50 <0.50 12/07/95 <50 <0.50 <0.50 <0.50 <0.50 03/28/96 <50 <0.50 <0.50 <0.50 <0.50 09/20/96 <50 <5.0 <0.50 <0.50 <0.50 <0.50 12/06/96 <50 <5.0 <0.50 <0.50 <0.50 <0.50 03/27/97 <50 <5.0 <0.50 <0.50 <0.50 <0.50 MW-2 12/14/93 63,000 20,000 1,400 400 2,100 03/29/94 60,000 23,000 860 400 1,500 06121/94 70,000 33,000 840 <250 560 09/20/94 57,000 25,000 660 250 950 12/23/94 51,000 20,000 780 270 1,100 03/13/95 49,000 22,000 1,300 280 1,900 06/20195 26,000 11,000 280 140 440 09/27/95 36,000 17,000 510 260 1,100 12/07/95 24,000 9,100 180 120 450 03/28/96 16,000 6,500 130 130 390 09/20/96 32,000 <500 14,000 440 150 1,000 12/06/96 28,000 <500 17,000 220 50 570 43/27/97 33,000 2,800 6,000 280 <130 670 MW-3 12/14/93 <50 <0,5 <0.5 <0.5 0.95 03/29/94 <50 <0.5 <0.5 <0.5 <0.5 06121194 <50 <0.5 <0.5 <0.5 <0.5 09/20/94 <50 <0.5 <0.5 <0.5 <0.5 12/23/94 <50 <0.5 <0.5 <0.5 <0.5 03/13/95 <50 <0.5 <0.5 <0.5 <0.5 06/20/95 <50 <0.5 <0.5 <0.5 <0.5 09/27/95 <50 <0.50 <0.50 <0.50 <0.50 12107!95 <50 <0.50 <0.50 <0.50 <0.50 03/28/96 <50 <0.50 <0.50 <0.50 <0.50 09/20/96 <50 <5.0 <0.50 <0.50 <0.50 <0.50 12/06/96 <50 7.3 <0.50 <0.50 <0.50 <0.50 03/27/97 71• <5.0 <0.50 <0.50 <0.50 <0.50 MW-4 09/20/96 <50 <0.50 <0.50 <0.50 <0.50 12/06/96 <50 <5.0 <0.50 <0.50 <0.50 <0.50 03/27/97 <50 <5.0 <0.50 <0.50 <0.50 <0.50 . NOTES: _ Methyl-Tertiary•Butyl Ether. < Below indicated detection limit. NIS - Not sampled.