Laserfiche WebLink
r ,y..r �„ ,....y,.y .:•Ix..,. �-.: . -I..,,.t-_,.- vv...:•� -yxr..,wf-t;.i:y..'w� <br /> , <br />' 19 November'1999 ' <br /> :. AGE-NC••Project No. 98-0440' <br /> Page 4,6f;5 +I 3 <br /> t <br /> 1 t <br /> , <br /> (Table 2): <br /> Fuel oxygenated.compounds have' not been detected in any 'wells r for f ve consecutive <br /> quarterly monitoring/sampling events x <br /> petroleum" h drocarbon c <br /> ' • � Dissolved � y onstituents have not been detected in wells MW-1, MW- . <br /> ' 3 and MW-4for tvvo consecutive quarterly sampling events (Table <br /> Based upon datacollected during the September 199,9 monitoring, AGE concludes: A� ' <br /> A'ground water'flow direction-generally toward the.north-northeast ata gradient of 0.003 r: <br /> ft/ft in the area. s . _ _ - <br /> a, ..', b 1� 2, _ <br /> bound by we <br /> I M17J. MW MW 3 and IviW-4: <br /> • . The elevated petroleum hydrocarbon concentrations detected in the water'sample.collected:, { <br /> from Well MW-2 (screened between 5 and 25 feet lisg) suggest''that'this well may b,�: <br /> screened withiri or near.the dissolved petroleum hydrocarbon "core area" of the plume':; <br /> The <br /> lateral dissolved petroleum'hydrocarbon plume is,unknown east'.northeast and southeast <br /> t ; <br /> Laboratory tests.suggest that fuel oxygenated compound$:(MTBE, DIPE, TAME, ETBE and <br /> 'TBA) are'not,present at.the site. : " <br /> S.Q. RECOMMENDATIONS <br /> `. ., _ y •• .. ., b <br /> I <br /> c <br /> Based upon the�results`,df,this investigation;AGE recommends . ' <br /> h Reduction of quarterly monitoring/sampling eve nts,from wells MW-1 .TvIW-2, MW.=3 and ' <br /> f _' II <br /> MW-4 to semi-annual,.,;rhonitoring/samplings events: Thus •far,;, five• ground water <br /> monitoring/sarnplirig:events have-been performed''at wells•MW-MW -3 and'MW-4.from4 , ! j <br /> July 1998'to Septem er.1999:AGE.believes that. <br /> quarterly..ground water inonitoringlevenis <br /> • <br /> at this stage of the investigationL notis 'cost effectiveand will not provide use'ful•informatiorr <br /> 1 <br /> 1, <br /> j itoring/sampling event should lie <br /> PP g <br /> to;su lenient�the on oirig investigation. The next mon <br /> scheduled for March 2000. <br /> • I. <br /> . f ` <br /> , <br /> h 1 t <br /> • Ehminatioi of EPA Method$ x l'! W <br /> H 2b0 testing for fue�'o ygena edeompaunds from the analytics <br /> im' en. AGE.believes'that=laboratory.�testing,at.the site lias'shown that fuel oxygenated r' <br /> can3pounds are not.present atlhe.site; additional•Itesting for�f oxygenated coiripounds will <br /> not provide useful''information to supplement'thee`"ongoing`investig-ation. = x <br /> i 'AdvrancedGeoEnvironmenial,Inc. <br /> t s. ' <br />