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i <br /> PETROLEUM WNTAMINATED SOILS <br /> , <br /> r <br /> 10 Burd,R B ,W E Stewart.and E N Lightfoot.Transport Phrnomena.(Nevi York. <br /> NY- lohn Wiley& Sons, IWA. PP 511--512 <br /> 11. Millington.R J ,and I M Quirk "Permeabiliq of Porous Solids."7}ans Farm- r r' <br /> day Svc, 57:1200-1203, 1961 <br /> 12- Bruen,C I.,and G E Hoag "The Diffusion of Gasolme-Range Hydtocarhon Vapors <br /> w Porous Media,Experimental Methodologies," in Proceedings of the NIVWAMPI <br /> Carefereure on Pelrateem H)rirrochathons and Organic Chemicals in GroundK°arer- <br /> Precrnnoit, Defection. and Reuumiimi. November 12-14, Houston, TX, 1986 <br /> 13 "Superfund Exposure Manual," U S Em-tronmental Protection Agency,Office of <br /> Remedial Response, Washington, D C, EPAl54011-981001, 1986, p 16 <br /> f <br /> 14- IRIS(Integrated Risk Infomialton Syctem),Office of Health and Environmental As- <br /> sessment, Environmental Protection Agency, "Benzene," last revised 311189 <br /> CHA`-' <br /> T; <br /> f A Toxicological Assessment of Uh� <br /> i Gasoline Contamination of Drinkinz� <br /> i William R.[Iartley,Tbdane Umverhrity School of Public Health and Trop <br /> Department of Environmental Health Sciences, New Orleans, Louisiana <br /> P;d+rard V.Ohanlan,United States Environmental Protection Agency,Or <br /> l mg Water, Washington, D C <br /> i <br /> Ile purpose of this chapter is to present toxicological appio.ich <br /> ' rrumng Mater quality criteria for drinking water andlor groundwatcr, <br /> s uuth unleaded gasoline from leaking underground storage tanks Of al <br /> 12,444 release incidents of petroleum products occurring bemeen 19 <br /> more than 70% were due to gasoline alone 1 There are a reported <br /> underground storage tank systems with mostly petroleum praduLIs t <br /> States Although the actual quantity of gasoline migrating into gr, <br /> unknown, it is clear that a need exists to de%elop a strategy for c� <br /> health risks from unleaded gasoline contaminated drinking water <br /> E <br /> UNLEADED GASOUNE COMPOSITION <br /> Unleaded gasoline is a complex mixture of hydrocarbons conshelhn!` <br /> hydrocarbons, c.ycloalkanes, alAenes, aromatic hydrocarbons, and <br /> arotnalic hydrocarbons (PARS) It f"quently contains additive" ur <br /> hancers such as methyl tertiary butyl ether(MTBE) It is dif icull, u <br /> sible, to define an exact chemical profile for unleaded gasolinc Sirn <br />