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Table 3. Historic Groundwater Chemical Data, can't Well No Date TPHG Benzene Toluene Ethylbenzene Xylene MTBE ugh W _ MW-3 1215194* X200 NO NO NO NO NA MW-3 413195 NO NO ND NO NO NA MW-3 6116195 NO ND NO NO NO NA MW-3 9114195 NO ND NO NO NO NA MW-3 12/26/95 NO NO ND NO NO NA MW-3 3128196 NO NO ND NO NO NA MW-3 6127196 NO NO ND NO NO NA MW-3 9123196 ND NO NO NO NO NA MW-3 12/19/96 NO NO NO NO NO ND MW-3 3110197 NO NO NO NO NO NO MW-3 6130/97 NO NO NO ND NO NO MW-3 8120197 NO NO NO ND NO NO MW-3 12/10/97 NO NO NO ND NO ND MW-3 3131198 NO NO NO ND NO NO MW-3 6130198 NO NO ND NO NO ND MW-3 9129198 NO NO NO ND NO NO MW-3 12/29/98 NO NO NO ND NO NO MW-3 3129199 NO NO NO ND NO ND MW-3 6130199 NO NO NO NO NO ND MW-3= 1015199 NO NO NO ND NO NO MW-3 1127100 NO NO NO ND NO NO . MW-3 4120100 NO ND ND NO NO NO MW-3 7119100 NO NO NO ND NO NO MW-3 10/17/00 NO NO NO ND NO NO MW-4 8120197 NO NO NO ND NO NO MW-4 12/10/97 NO NO NO ND NO NO MW-4 3131198 130 NO NO ND NO ND MW-4 6130198 NO NO NO ND NO NO MW-4 9129198 NO NO NO NO NO NO MW-4 12/29/98 NO NO NO ND NO NO MW-4 3129199 120 NO NO ND NO NO MW-4 6130199 ND NO ND NO NO ND MW-4 1015199 NO NO NO ND NO NO MW-4 1127100 ND ND NO ND NO ND MW-4 4120100 73" NO NO ND NO ND MW-4 7119100 ND ND NO ND NO ND MW-4 10/17/00 NO ND NO NO NO ND ND-None detected NA- Not Analyzed ugA- micrograms per liter *-Samples not analyzed at RWQCB detection limits for this sampling event MTBE-Methyl-Tert-Butyl-Ether and fuel oxygenates by Method 8260 from 313198 forward no rept -laboratory had insufficient quantity to quantify TPHG 1,2-Dichloroethane was ND for all wells for 3129199 sampling -Very low VOC detected June, 1999 "-Laboratory reports that this did not match their gasoline standard Page 6