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t 2 � }Tx r e�,,. i ��:�," i2 wF°4� r.11:'�f'�+ 4F•R ' 'Y3"*wS i 5 i�`>�� . � s.3. <br /> f , . 33PD1 <br /> 7-18-96 (- <br /> `2 ,y 3 <br /> „" <br /> p, x �+ wti" c %� k waj� w�" <br /> Uu r` FT �l' <br /> 3 <br /> <3a F <br /> '7t! <br /> H <br /> •L.ativlCIICC .Beasl <br /> l w <br /> ojeci 25, <br /> Pige S <br /> qt <br /> s be sutrat�od. Tvtal�takc of cath ctteirtirail is the bf=of' " `�4" <br /> nit dues across all Wqs��rye to <br /> xt• �,� � (}[1% �'" w,✓ �h�-. y e r r, r;scree routes(oral„^ <br /> _r <br /> Y 'ii M i b� <br /> a fate°= <br /> _ej = �'rM <br /> i Totiicty Assessment. lr ordci to cJ orharacxeiizaM <br /> {A - =risk iri theoretical rrottcar�ynoir cam J <br /> v. d t <br /> assoc�oecl wllli alt eek uri exposure Pathways, Wxiciiy id6n ratmn for;ea&of. r r,, <br /> chee"of potential concern wtll be evaluated in aaordaide with Sectidin 7.0 of USEPA's, L , <br /> RAGS. <br /> Risk Charatterizition, In accordance with rel,%LWOrY gam, both gel, and <br /> Mngeuc risks wdl be csMnaed No=winogenic=6, will be a Umed by coming <br /> cxposum levels derived during the a zpasure assessment(Subtask 2) wttWwuba-hed <br /> fer <br /> dosaM (or them equivalents) as determined in Subtdsk 3 Total no <br /> ncarcinogenic riskdue <br /> mult]Ple "Posures to an chwicAL of potMUW Lonu.ern with the ore in <br /> �n Weil also be sunvned m ace-ordartce with rc targe organ <br /> art L'aIled hazard ' ��y Protocol, these values <br /> �ndx= (MD. HIS that exceed unity kfiL•ate that potential nowarcinogenrc; <br /> drecuto rMePtors may occur urrdccr the am ned conditions at the site.` Y <br /> ThwmbW upper bound (95th pi j=ttle)pmbabil4 of new cases of cancer will be caiCerhrtod <br /> by muktplYing citirrrated daily exposure levels (Le., theoretical average daily intakes) by carver <br /> slope factv=a. Risks from all potential exposure pathways arid eaiposwe routes for eacltr° <br /> chem of potential concern will be sunrrmd. A1w,,buurl*b of,uncxttairo Mhereti in the <br /> est>urtato,and wwripttons used throughout the risk assessment will be evahmted yualrtatively. <br /> Derivation of Risk-Based Corrective Action Target Level& The State Water Resourm <br /> Control Board has recently adopted a new appmaLh for uttegr mg rials assesmiGtt into i <br /> petwieurrl-unpacted sites within CahfomL one of the srgn6mm aspen-ts of this integration Lc <br /> the estabUarrM of RBCA target level% protective of human heahh and Ion his to <br /> groundwater, Air assessment of the potenual rezxt om to future usages of the site based on <br /> dos Wrote will be a valuated. The RBCA evaluation will indicate to what extent the <br /> conccnhauons of chemicals m sod should be reduced to achteve art"acceptable"risk level. <br /> EMCON wfil calculate both 'Laitcer-based and noncancer-based RBCA target kvels for <br /> appropriate constnuents of TPH and,Present aMo nate rationale <br /> levels at the site. P for employing these target <br /> i <br /> Task 4-Report Preparadon <br /> i <br /> EMCON will <br /> prepare a site Llosuitc report The report will surtrrnarize the methods,valves, l <br /> assumphons, and results of the RBCA aralyw and will be Prepared in accordance with . <br /> I <br /> I � <br /> I <br /> SA[1N�PR(�P96u'96oro2S..tS-94Vlb�9 -. <br />