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Cemex Vernalis Quarry Mining and Reclamation Pmject produetien fate. Thefefefe,the mwEinmm eafeinegenie health risks ftem DPM asseeiated with th projeet would be signifierint. The maxinitun annual ao,,eFage concentrations afe less than the nen ee&einegeni.. ACl of c ..,./m' thus leading to a hazaFd index of less than the n n:fiaana h.aaheld of 1 TheeC a the non eareinegenie .:ah &em r111114 would he lean than a:enifieant Based on an analysis ef the census 4 f,,. the areen ,:thin t miles of the nfejeet, t�Tnal a:aane. is ne mefe than 20 yeaFs. Q. adjusting e e to a 20 year sidene., the amual aveFage DPN4 eaneeft4ratiens evef that peried and at the same receptors were estimated to be 0.066, 0.050, and 0.033 /m3 f,.r the pfed.etien fates of n 2.95, and 1.7 minion tone Fespeetiyel.. Thine the DPN4 unit flak C ata. a established by lIIIWA the m inertmenW eaFeinegenie .:a, f ern a on yeaF expesum would he 20 15, and 10 .. million, for the predtte4ien fates of n 2.85, and 1.7 mill:,.., tone respeefively. These : ent eaterf than the signifieanee threshold of In in a m:11:en The.ef. the eafeinegeni., health .:alfa from DPN4 a ted with the project would he a n:fieant The 3 leading to a hazmd inde_c of lean than the a nifieanaa thfeshnld ,.f 1 The.ef a the ear-eineg : h ftDPN4 would he lean than a n:Ct Additional a nl in f nnation .linS..the e -aam ean eSa- dispersion modeling and the health .:al. assessment . given in Appendix D although the modeling ineluded beth DPN4 emissiens ftem ensite apefatiens and from haul tfueks, the greates not 5*eet to CARB and federal EPA regulatiens that eever only an read equipment. Controls for non-road equipment engines with CARB-certified DPM filters and catalysts, while using ultra low sulfur fuel (ULSD),would reduce DPM emissions from equipment by up to 85 percent.The traps catch the particulate matter and allow the catalysts to "bum"the DPM, while the ultra low sulfur fuel prevents the catalyst from becoming contaminated.With the use of only CARB-certified catalysts in conjunction with ULSD,but without particulate filters,the control efficiency would be about 50 percent. By using catalyzed filters on some equipment and catalysts without filters on others,the overall DPM emission reduction would be about 70 percent. The best and most appropriate candidates for retrofitting would be the excavators,on- site haul trucks,and front end loaders. This equipment is used most often and most frequently. These engines would run hotter and would more readily reach critical internal temperature for proper operation of the catalyst in the DPM filter apparatus. — To put project impacts into perspective,the average overall risk of a typical person in California should be understood. CARB conducted a study to estimate cancer risks from exposure to DPM _ in the State and to develop a risk reduction plan (CARB,2000). The Study reported an estimated statewide average ambient air concentration of DPM by using measured ambient air concentrations of surrogates to DPM in a receptor model. Based on the receptor modeling results, the statewide average cancer risk from exposure to diesel exhaust was estimated to be 540 in a million. CARB report also states that cancer risks from diesel exhaust are about 70 percent of the 4 <http://factfmder.cellsos.gov/servlet/MapltDrawSelvlet?geo_id=15000US060770055001&tree_id=403 &context=dt&_lang=en&_ts=139252421476> Cemex Vernalis Quarry Mining and ReclamaWn Project 4-52 ESA/203015 Final Ervironmental Impact Report June 2008