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TableZ'Historic Groundwater Monitoring Well Chemical Data, con't. <br /> Well Date TPHG Benzene Toluene Ethylbenzene Xylene Fuel Ox. 4 <br /> No. Sampled --------------------- --------ug/1------------- — <br /> 4 <br /> MW-9 8/20/97 14,000 1.2 4.0 14 24 ND I <br /> MW-9 12/12/97 260 11 15 3.7 12 ND ` <br /> MW-9 3/31/98 15,000 1,700 470 890 1,500 ND <br /> MW-9 6/30/98 29,000 1,600 490 1,400 2,900 NO, <br /> MW-9 9/29/98 12,000 680 80 710 1,700 ND <br /> MW-9 1/14/99 14,000 1,300 300 1,200 1,700 ND <br /> MW-9: .__ 4/29/99 5,800 1,000 60 540 550 ND <br /> 'MW-9 6/30/99 7,600 850 59 450 760 ND <br /> Blank 6/30/99 NO NO ND ND ND NO <br /> latest sampling <br /> ND- None detected NA- Not Analyzed ug/I-micrograms per liter <br /> Fuel Ox. - Fuel Oxygenates by Method 8260 from Dec., 1997 forward. <br /> `-Quantified as MTBE. @-matrix interference reported. <br /> 1,2 Dichloroethane ND in all wells. <br /> II <br /> I <br /> i <br /> I <br /> I <br /> f <br /> Mr. Ed's Muffler Project No. 4090-P Page 13 <br /> 1 <br />