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Herman&Helen's Marina-First Quarter,2000,Groundwater Monitoring <br /> April 20,2000 <br /> Page-5- <br /> TABLE3 <br /> Historical Groundwater Monitoring Data <br /> Gasoline TEPH Ground <br /> B T E X TPH-G Oxygenates/ DTW Water <br /> Additives Kerosene Diesel Motor Oil Elev. <br /> Detection DATE OJ 0.3 0>- 0.6 0.05 1.0-10 0.05 005 0.5 <br /> limits: µyl 1µ/I 48/1 µfa o li µF/1 mg/I mg/! mg/l <br /> Well/Elevati.n <br /> MW-1 9/18/97 ND NO ND NO NO NO NO ND NO 5.98 94.02 <br /> 100.00 <br /> 12/31/97 NO NO ND NO NO ND NT NT NT 5 8] 94 13 <br /> 3/27/98 NO NO NO ND NO ND NT NT NT 4.99 95.01 <br /> 6/26/98 NO ND ND NO ND NO NT NT NT 4.]2 95.28 <br /> 9/30/98 NO ND ND NO ND NO NT NT NT 6.04 93.9fi- <br /> 12/30/98 ND NO NO ND NO 1.3(MTBE) NT NT NT 6.40 93.60 <br /> 3/26/99 NO NO YD ND ND ND NT M NT 5.15 94.85 <br /> 6!30/99 NO ND ND ND NO NO NT NT NT 5.44 94.56 <br /> 9/23/99 ND NO ND ND NO ND NT NT M 5.92 94.08 <br /> 12(22/99 NO NO NO NO NO ND M NT NT 6.50 93.50 <br /> 3/17/00 NO ND ND NO ND NO NT NT NT 5.49 94.51 <br /> MW-2 9/19/97 0.4 ND ND L5 1.5 550(MTBE) NO ND NO 7.32 7166 <br /> 80.98 72(tem botanul) <br /> 3.6(TAME) <br /> 12/31/97 12 1.0 0.12 27,000(MTSE) NT NT NT 4.98 76.00 <br /> 1,400(cert.Lown.[) <br /> 30(TAME) �• <br /> 3/27/98 ND- 43 3.6 13 ND- 110.000(MTBE) NT NT NT 5.96 75.02 <br /> 6R6/98 ND- NO- ND- <br /> ND- WD- -3,000(MTBE) NT NT NT 6.72 74.26 <br /> 330(TAME)* <br /> 9x0/98 ND• 7.0 NO' ND- ND' 59,000(MTBE) NT NT NT 6.99 73.99 <br /> 270(TAME)�• <br /> 12/30/98 ND 1.2 ND NO ND 11,000(MTBE) NT NT NT 4.63 76.35 <br /> 150(ten.butanol) <br /> 37(TAME) <br /> 3/26/99 ND• ND' ND- ND- ND- 130,000(MTBE) NT NT NT 5.00 75.98 <br /> 1,370(TAME) <br /> 6/30/99 ND' ND- ND- ND' ND- 190,00(MTBE) NT NT NT 7.01 73.97 <br /> 520(TAME <br /> 9/23/99 NO 1.6 NO ND 0.05 92,000(MTBE) NT NT NT 7.72 7-.+.26 <br /> 520 AME ♦• <br /> 12!22/99 NO' IS ND- ND- 0.1 100,000(MTBE) NT NT M 7.05 73.93 <br /> ♦' <br /> 3/17/00 9.2 ND- ND- ND- ND' 59,0W(MTBE) NT NT NT d.9d 76.04 <br /> All Measurements Are In Feet-All Elevations Based On An Assumed Elevation Of 100.00 Feet For MW-1 <br /> Unit Conversions: Analytical <br /> µg/1=parts per billion BTEX=benzene,toluene,ethyl benzene,xylene <br /> mg/I=parts per million TPH-G=total petroleum hydrocarbons,quantified as gasoline <br /> ND=none detected at or above laboratory detection limits <br /> NT=not tested for this analyte <br /> MTBE=methyl tert-butyl ether <br /> TAME=tertiary amyl methyl ether <br /> 4=all other gasoline additives/oxygenates were not detected at or above the laboratory <br /> reported detection limits. <br /> *=Laboratory detection limits raised due to elevated concentrations. See Certificates of <br /> Analysis. <br /> J N� <br /> CONDOR <br />