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HLim.in& HLILn S Minna - Fourth tluaricr 1998 GroundwatLT Munnnring <br /> I Lbruary 7 1999 <br /> Page 3 <br /> TABLE 2 <br />' Laboratory Analytical Results <br /> Groundwater Samples (December 30, 1998) <br /> Oxygenates/Additives <br /> MTBE Ethanol tort- D}PE N FBE TAME <br /> Butanol <br /> I hteetlon 0 3 0 3 0 3 06 005 1 0 1 0 14 1 0 1 0 1 0 <br /> I rnrltti Icg/] }g/1 pg/1 µgl nig/1 µg,l µI/1 µg/l µ€;Il µg/l µg/1 <br /> Andktical Method 602 602 602 602 5030 8260 8260 8260 8260 8260 8260 <br /> Sample 1 1) <br /> 1432-MW I-12/30198 ND ND ND ND ND 1 3 ND ND ND ND ND <br /> 1432-MW2-12130198 ND 12 ND ND ND 11,000 ND 150 ND ND 37 <br /> 1432-MW3-12/30/98 ND ND ND ND ND 3,500 ND 130 ND ND 83 <br /> 1432-M W4-12/30198 24 04 23 22 02 1 5 ND ND ND ND ND <br /> I Inst( 0114treal <br /> µg/1 part,,per billion(ppb) H I FX ben/ene tOluenc ethyl benlciie and rN lent. <br /> mg/1 pari,,pir million(ppm) 1111-0 total petraleum hWrocarbons yuanitfiLd a_,,t.atioltne <br /> ND none detLelLd at of dhui c laborstur) reported di t"01 tin 1ur11t <br /> M 1131- - meth}I tort-hut~I ether <br /> lent Butanol tertiary-bulanol <br /> D11'f- di-isoprop)I ether <br /> I i TBI ethyl tertiary-butyl ether <br /> I AM] tertiary-am)I methyl ether <br /> ND=-not detected <br /> i <br />' 3.4 GROUNDWATER ELEVATION CONTOURS <br /> Groundwater elevation measurements colleeted at the, site on December 30, 1998, indicated that the average <br /> depth to groundwater was approximately 5 4 fist below the monitor well and surface water station measuring <br /> points Fhe average, depth from the ground surface to groundwater mLasured in the monitor wells was <br /> approximately 4 6 feet (taking into consideration that the measuring points for MW-2 and MW-3 are <br /> approximatc,ly two feet above the ground surface) The groundwater elevations for the wells and the surface <br /> water elevations are shown in Figure. 4, Appendix A Figure 4 shows the estimated groundwater elevation <br /> contoui s on December 30, 1998 111e contours indicate a very steep groundwater gradient towards the island <br /> Idrainage cliannel <br /> Naiiw <br /> aw• <br /> tM CONDOR <br />