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Table 4 Historic Groundwater Chemical Data, con't . Well No Date TPHG Benzene Toluene Ethylbenzene Xylene MTBE --_---____--_----------- ug/l ---_�_�------------------- MW-3 12/5/94* <200 NO ND NO NO NA MW-3 4/3195 ND NO ND ND NO NA MW-3 6/16/95 NO ND NO NO NO NA MW-3 9114195 NO ND ND ND NO NA MW-3 12/26/95 ND NO ND NO ND NA MW-3 3128/96 NO NO NO NO NO NA MW-3 6/27196 NO NO ND ND NO NA MW-3 9/23/96 ND NO ND ND ND NA MW-3 12/19/96 NO NO NO NO NO NO MW-3 3/10197 ND NO ND NO NO NO MW-3 6130197 NO NO ND ND ND ND MW-3 8120/97 NO NO NO NO NO NO MW-3 12/90/97 NO ND NO NO NO ND MW-3 3/31/98 ND NO ND NO ND ND MW-3 6130/98 NO NO NO NO NO NO MW-3 9/29198 NO ND ND ND NO NO MW-3 12/29/98 ND NO ND ND NO ND MW-3 3/29199 NO NO NO NO NO NO MW-3 6/30/99 NO ND ND ND NO NO MW-3E1 10/5/99 ND ND NO NO NO ND MW-3 1127/00 NO ND NO NO NO NO . MW-3 4/20100 NO ND ND ND ND NO MW-3 7/19/00 ND NO NO ND NO ND MW-3 10/17/00 NO NO NO NO NO NO MW-4 8/20/97 ND NO ND NO NO NO MW-4 12/10/97 NO NO NO NO NO NO MW-4 3/31198 130 ND ND ND ND NO MW-4 6130/98 ND NO NO NO ND ND MW-4 9/29198 NO NO ND NO NO NO MW-4 12/29/98 NO ND ND NO ND NO MW-4 3/29/99 120 ND NO ND NO ND MW-4 6130199 NO NO NO ND NO NO MW-4 1015/99 NO ND ND ND NO NO MW-4 1127100 ND NO NO ND NO ND MW-4 4120100 73" NO ND ND NO NO MW4 7119100 NO ND ND ND ND ND MW4 10/17/00 NO NO ND ND NO NO NO-None detected NA-Not Analyzed ug/l-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 3/3/98 forward no rept -laboratory had insufficient quantity to quantify TPHG 1,2-Dichloroethane was ND for all wells for 3/29/99 sampling ❑ -Very low VOC detected June, 1999 "- Laboratory reports that this did not match their gasoline standard . Detection limits are,TPHG 50 ug/l, BTEX 0 5 ug/l, MTBE, TBA, ETRE, TAME 5 0 ug/i, DIPS 10 ugll Page 16