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4.Minor Revisions to the Draft Environmental Impact Report <br /> impnet •7! Projeet T-ACs impact from Asphalt • <br /> impleme"thfien of the <br /> project may 1 «d to :n ..6«n«:.. exposure eL nearby S:4:..e .e ente.S 4.. Certain <br /> toxie ftiF eontminants from the asphalt batehing operations. This impact is less than <br /> I'1' <br /> fi1e--_L <br /> � 'nfft <br /> Emission points wiffiin the asphalt plant ineludes a natural gas fifed bufner on the iltying ' <br /> t6 raixing dram, natuFW e het fi.ed et e:l heater-in the ....nl...lt«:1 storage tanks ..N,e.ven6elt <br /> mixingplant handling such as tpdek leadeut and silo filling, and sterage piles. The drying dpdm and <br /> d«.«. v A e ducted t.. .. C t ifie filter..4..,.1.4,.the atmosphere. The het oil Heater... .n� <br /> 4iree4�;. 4-the om <br /> i <br /> health effeas. OEH14A has also established a unit risk value fef speeifie TACs. A --mit Fisk liga—hip <br /> is <br /> the ebability of eentmeting eaneer:Ce j ..ed tavemge ntn.ti.. eF 1�tg/m3� <br /> 70 years.. The.. and nien e health Finks due t..the asphalt l...tel,;n <br /> epefatiens were estimated by eentittetifig dispersion modeling of TAC emissions fr-em asphalt <br /> epeFatiens;both the hot mix plant and ffigiltive emissiens ftom leadeut, silo filling,and sterage. <br /> The primai�, elipeSUFe pathway was identified as inhalation. Opiamfion was assumed te be <br /> 24 heurs a day (dwing periods ef peak demand)threughout the year, e�xeludiflg Sundays. TAC <br /> Le can.es____ _ were modeled using U.S. EPA _Tr__ ..d d:.«e«.: .. « .moi:to estimate ambiefft ..�. <br /> eentained in Appendix D. Using the unit risk factofs,as established by OEH14A,the mw.kimttfn <br /> Y� ineremental eafeinegenie fisk is estimated to be less than 0.05 in a million. The inw6frittm ann" <br /> wveiege seneentratiien is less than the non eareinegenie AEL,thus leading to a hazard index mtteh <br /> less than the signifieance threshold of 1. Thefefefe,the eareinegenie and non eareinegenie fisk <br /> fiem TAC due to asphalt opefutions, wheft added to the ether pfeject eempenents, weuld be less <br /> than signifieant. <br /> Ailitiption! Ne mitigation required. <br /> �a <br /> I` <br /> L <br /> Cemex Vermlis Quarry Mining and Rmlamation Pmjed 4-55 ESA/203015 <br /> Final Environmental Impact Report June XCG <br /> I <br />