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09/42 '00 WED 17 05 PAS 18259469968 ERh[9PEST QVC 422 <br /> i TM <br /> x' AGE 5 <br /> i <br /> Inhalation of fugitive dust released from exposed soil(nonvolatile <br /> compounds only) As there are no non volatile compounds present m <br /> soil,this pathway will not be evaluated further <br /> Ground Water <br /> For the subject properties,the only realistic ground water exposure <br /> pathway involves the inhalation of VOCs'that may be released From the <br /> water table into ambient air Such exposures may occur under current <br /> conditions(when the depth to ground water averages 4 to 10 feet below <br /> ground surface,ERK 1999),and during construction activities(when the <br /> depth to ground water may be less than 4 feet below ground surface). <br /> Other po ntaat exposure pathways related two ground water were not <br /> considered to be realistic for these sites,as explained belou- <br /> c Shallow ground water to the vicmity of the subgect properties is not <br /> used for water supply Further, due to the adjacent heavy industrial <br /> facilites and the nearby Superfund site,beneath which contamunated <br /> ground water persists,it is unlikely that shallow ground water in the <br /> . vicinity will be used as a water supply in the foreseeable fu ure. Thus, <br /> exposures associated with residentiod and irtdustrial use of ground <br /> water are,not realistic for the subject properties <br /> Impacted ground water is confined to a small area in the immediate <br /> vicinity for the former USTs. This observation is based upon the eight <br /> years of ground water monitoring perfomed at this site. Thus, the <br /> emigration of grouM water to adjacent surface water bodies and the <br /> migration of ground water to deeper water-bearing units do not <br /> represent realistic exposure pathways for these sates <br /> The presence of shallow ground water at the site precludes the <br /> construction of buildings with basements or other subsurface <br /> structures Thus, the migratiort of VOCs from ground water into <br /> confined spaces does not represent a realistic exposure pathway <br /> ° VOCs detected in ground water include benzene,tarluene,ethylberzene,xylenes, <br /> 1,2-OCA,1,3.5-'tMB,and 1,7.4-TMB tv MF-is not coMuxed to be volat+le <br /> UJ°SEPA Region 9,1999) Similarly,TBA is not consademd to be volatile,bated on <br /> its structural similarity to 2 buts l Note that TBA and 1-butanol have ideinbcal <br /> chernica!#oranulas and sioular chemical properties The compound 1-butanol is <br /> not considered volatile by USEPA Region 9(1999) <br />