Document RjdBLMR4wd2rxLBXwLjVx277n

+ 111 TOXICITY 3AF3TY INaMtSXINa fTANOAHO THRESHOLD LIMIT VALUES OR AIRBORNE CONTAMINANTS MCIRSISES STAMOARO RCarrirmcO AFH3. 1001 dAN 13T0 JAM 191* S2T Pao 1 of 23 Thia aiMM ineluoaa raauramanta at tna Oesuoauonti Sataty ana Hsattn Acs el 1*70 (OSmai ta euananad m me Aaaarai Asytsur. OtHA information it pMiMd in md. 1. SCOW 1.1 Thk Mndard yreridm a liR afthaaaheid limit valuta (TXV) si air asntamiaaau ts yrovidt criteria far ufs rtmynay work srrrirnranunit TLV it ckfimd is 54. U Tha TLVi liaud is Ttbitt l throt|b 4f trt raoemmaadtd valam tf tha Aawriaan Canfaranaa of Govern. Maul Material Hyyitniata (ACGIH), and as rayriatsd with thair yermieaien. toytthar with iba aaonmpasyiay pnfn. tat taetfaa 5. and Ayyaadkes A tkrsayh 6. lha valass an reviewed tad yhlkhed tamilly by ACCIH. with the valnaa liaud hart btiaf ukan frsa du 1*13 Ust. 14 Tahla S litw mbananas far arhkh data waiykfad mri|i (TWAlTt. aaiUnctt and yaahtT asaaangaiiana atublbhad mdar OSHAf. Each af ikan i alas it iaeiadad in Tahla 1 with rafaraaaaa ta Tahla S far tha ssiliny and yank gaBcintraaeaa. Z APPIYMC TLVs 11 Many attarfans whaaa tank lahatanut tia I Bay mptlra dauilad tariaw by iyni liliniil iadaanial hypmint. and uskelayfam to obtain tha pTlamai in daaipt aaaarala. Whan addhiaval lafiwmian la naadad on At uddtr ad athar parish and tha baahk that mar ha maaiatsd with dm*. atsanitation ha made with tha Haahall Lthantary far Tesimfayy tad Indamial Madktaa. 14 Safety atfaaa in DI174X ihaH ha faUewad oats may ast bats beta saiilabk whan 03 HA raysluiam wars idaytad. tea 34 and 5.4.1. 14 Carabuyana 14.1 Balm qiyiyiay ta tha aunofaetaia, yiaetaa lay. yaakayiay. hmiftny and atarayt of thaaa matarialt ara pacified ia OSHA rayalationa 1*10.1001 1910.1039 at listad boisw. 1910.1001 19104003 Coal tar yiab talatilas 19104001 feditrobiyhesyi 19104004 alpha Waythylmint 19104004 Matbyi ablaram ithyl athar 1*10.1001 4. Uhhfatabsakdias (tad ha uiti) 19104000 hit Chlaramit.byi athar 19104009 beta-Naphthyimiae 1910.1010 19104011 19104013 Ithyfaaakaist 1910.1013 batmPlspialiUoaa 19104014 4.Aaatyiambia<laarin 1910401S 4J)bawhyfmiiwiiinabii aaai ia 19104014 NNitrnwidimiihylmint 19104017 Vinyl fekridt 19104014 1910.104$ i Laid 1910.1030 1910.1039 Caka Owta : 1910.1044 1. Mjfarnsaiil tblarniiiuyiina 191040a Aarylaakriln HVi far i faw malsriak Baud la Tibia 1 tad 2 art (kaa mkls) dun mlam thaws is OSHA 1*10.1900. Ttbbs Z-l tad Z-I, whkh ara based an 1948 ACCIH mlam. Far aeaeral other , Tahla 1 talas art saymantad by addWaaal i Vatad hi Tibia I. whkh k baaad ayea OSHA 11910.1000. Tibia Z-l la thaaa aaau. tha Tahla 1 Ittap ms rafarasaad as thaaa is Tahla 3. Alta, ayttifit OSHA raysletters hats baas datalaytd far a maker af materials, in addition ta thtir TWAt liaisd ia Tahla Z-l. Thaaa uautfala ara liaud la 444 and us I whirs thry ayyaar is Tabka 1 md 2. hi i an tyyneyritta isyatsu limit, hihanld be anted that ahanym by ACCIH ara baaad upas iafermstioa t lha tana la Tams 1.1 aid a am a a two < Mia. tt Ttaa- a i i 141. "yam* w LA ana -mnaf n IU 14.1.1 CAUTION, Hew layolatfaaa ara ta* At tha tint af ibb rrnnau and kid ntylntksa and yarta af tha araania CanaaJt tha Layal far latast I 344 3 tn bn. li whkh hats yisvsa. ar ara allayad in man at aaaaidarad by ACCIH ara in Ayytsdfa A. 344 A Ikt af metarkla daaiyMtad by tha On Pant ar nnyacud tarainayana. at datarminad by tha kdiatrial dayanmnu (and keiodia* tha OSHA Ikt). k aaaad yaartariy by tha Oarayatmnal Enairoamantal Camral Craay. Znyiatariay Sarvfat Ohr. lapnatriay Dtyt as dm "Caiainayrt Sysaaym Urn". ttiStnSi mssai tw auscaMMtTTtt mo. aa DUP 0960196 -4 DU 040506 CONFIDEHlIAt r THMSHOU) UNIT VALUCS OP AiAPOMNP contaminant* Arm. tui TM* Mp* * da* 1*7* 2J On Pm* UM * *n VMatfc ShervTem Ex- pagan Limit (STCL) calm lifted in Table 1 an "ta*. town aalnn" whhk been liaaa prefaced by the ACCS TtV nhcanniaae ha* net yaf anad epea by ike pim body. & -- " mn MM kr araUpljfii^ the TtV by aa arbitrarily abeam Caaur raapap fren US ta SJ>. STCL ealan ara radian m.change or witktfrawai. Kukdl Laberaaery rmamaoih that they mm, be mmi the aub>;aae mt action tawafd ranpUjraaa within On Pans. ham /" Xedaatian faatar far the aeawaditieaai werh dtedaie V Haaia worked par i*ry espaaan Uniyfa i*r -/V <*) x otmbi nroaum u\nit* XI TTV. van Innutitd ta ha und mtfy aa yniifalin#. teward tha aatabllabaMt) ef tala m^inuMMik f Uadt Car aamadMmal wark Howeeer. tha U.S. DapaiMnat at f ihir > iaoarpn rend lla ntablhhad TLVe. and aihar tmfafcy iaior. matiaa lata ita ragtilninn la iddftiaat. net# ar taaal refeiatine m*j ipeaify apecm liattaa dUhraet frees thaaa i* tha failowiap tablaa. U Uiahafl Lekemery haa artrhliahed expaeno Imia Unit far Xhaar wariuky, /. TLV-TWA fan TaMa 1 XU / tha caaa mt a 7-dey wcrfcwcah. tha ain/emr ia haaad aa w|aai haaia par week aad aapaawa'fraa haaia par weak, far man ahenisaia aa( indadad ! thaea tabIaa. and iaa few aaaaa. axpaama liaeita am tarn mm " eluded ia tha tahlaa. 34 Tha Iawa* mt than ralnaa ahaaM hai wad* >/ y tA, X1A (3) Far work ahadoin lan dual Ntheun pm i kjirJl ham par arcak. Egtndeaa (1) aad (3) ara aaa X BMWM UNITS TOR NONTRAOmONAL ; appftaabk. worn acHiouus XI Vark aahethdn athn tha* tha tiaikriaaal Xlnar weekday- 404ecr wnrfcwnh an in iaMwnial ae.raeieaa. ad u, tha lO-haar ytrkdey, 13-hoar workday, aad aanaal wark achedain with oeer* tina harm Utraahald Lhak Vahna (TtVa) db aaa apply tad) tckadoh* dm they uo dnipaad Or tha tradh tieaxl weak akadala "ta nprnaat naJdaaa aadar f which ir. h baUatad that aaariy ail warkara aaay ka repeal idly orpin id day after day withepf adeem efface.* xa n*knti*N n*M eamdatWa*. haa aa adkinal wark aAadafaa an aaaj rapaiariy. aa n. thaaffankadpraatar aa^layaa (l)'thraa|h (S) an aat appUaakla. Iafar la tha Uadaa ad tha N. Andaary mt Iriraea where applicable.** u OAUTlOMt Tha Mm amtiianM ta a eetaty laarfha la pmrtdad. Caaau* Haaka* Lakaratafy prim ta aaakln* iMnllltairt ahan*ra hi IM Unit ia lhaiaa ahrnld oaaaidn bath thai^araaead par day, and tha danaand hay> par day aneliia tha XXI himah dan fann/ia naan X4 far < aiapdaoah w f atiar fuUalMx a ndw. idad. aaiaakaad n faUaa (aaa X Stahauma aaab aa Ind aaN nanny which at* cantedau ta tha hady any liawty. Haral'.dn daily aa* p earn a ia aoaaapertaae m leap n tha aearapa weekiy length mt aapanara randn aa i / - N/34-A 14 / U) far which a Unit heat an tha "lawntt ; Mat ll X ad A A, -hannnnd faaaai ia lanmdr* Aaam at m Pam aa m , waanagm, oe. M eaan lOnaaar Ml 3 _____ DUP 0960197 DU 040507 *IT N*l> THRESHOLD UMIT VALUE* OP AMSORN* CONTAMINANT* APRIL lilt TMo Poe * -Ian 117* u 0* Pent UN al CTIL Values. Shact-Tm Ex. peMiia Liadt (STEL) valua lilted in Table 1 art "tan- utfce wdaat" which km km prepend by lha ACCIH TLV nboanaitm km act yt acted spaa by tba parent bed/. fa Men eaeea they were darned by nultipiyiBf the TLV ky < arbitrarily cheecn factor unfittf (m 1JS to 3.0. STEL aalaas are object to dtufa er withdrawal Haatall laboratory reeeNmada that they aot ka aada the tabjact at action tewtd aoaapUaara within Da Peat. *. OTHER EXPOSURE UMTI 5.1 TLV* were iattaded te ba aaed aady aa fuidaUae* tewtrd the awahlldtieaat at cafe working iimranNaan Hot. war, the U. S. Deparanant at Labor kae ioarrpn rated tbaaa aatabliahtd TLV aod other toxadty iaforNation iato in rtfiliation. Ie addhien. nata er local refillatiea nay apecify expanse limila dUTtieot hen thaai in the faliowiaf tibia*. U Haakall Laboratory ha* ottahliahod expoaiw* Haiti far ini ahoNicala aot included ia than tablaa, aad ia a few isaao*. eepoMse liatiu Bora rattrinhe thaa thoea ie. eiadud ia the labia*. whore / Reduction factor far the ooniraditioatl wark tchadula A w Hour* worked par day and the radaaod xxponre Ihnit ia LNT /L* (2) where IftT " Espaaera liadt far aonarodiiiuoal work Lp " Expanse lindt far (.hoar workday. -f_ TLV-TWA fan* Takia 1 4XS Far the aata at a T<day workweek, the reduction factor ia brand aa aspoaure hour* par woak tad expanse-bee haen per woak. (J) o U ' The Iowan at than reloa tkoeld ba aaad. 4. EXPOSURE UMIT* POR NONTRAOmONAL WORK SCHEDULES 4.1 Work whsrhiln other than the traditional t-hanr worldly, d&kear werkwaak are ancoeanred an i Minina in ir dairriil aparatlaoa. mb aa. the UMuar warfcdiy. lS-hnnr workday, aad aai wark aakadaiaa with a* data been. Thra*bld Lank Vahna (TLV*) da aot apply to itch aehodulM am they are daeipted far the waditional work adiadele "to riprniat atinrSfiim eedar wkkk it ia boliwod tlue nearly all workare Bay bo repnnodly Mpntd day atm day withal adrena tflaci." 4XS Far wark nbadulo* Ian thaa Tnl ho*s par day er IS boon par weak. Eqaatioao (1) aad (2) am not applicable. 4X4 Far 24 hoar aaodaweae expanse. Equoifana (1) thitMfh (3) are net appttuMe. Refer to the 90-day notinirai anpaave Hon* at the Nabaatl \ MiiEWiy mi SsiMaE nykaw ppUackls.M U CAUTION: Tha radaaSaw taator oaNelatlan la a StoaraSaai aoSnata arm aa aaramaa that an adequate safety ataisbi ia pieeidad. CiwauR Hooked Loaarataqratiartaawkbta NfniSasntahanfM in Vto U RedueUen weditionil weak ahoynwla No far the faUowioe: at iho < aare liMttie r hath the loNeaood ntpnui kaara d haote par day eowida the eon- 4X1 IBS tiw* faaur/io reoa 4d far aoaapbatnh of aStar atdalaaa, rodoatat, tahtnloiad aa follow* (mo / - \ /** " 14 / (1) I ea ahert lam adbna ar rapid iliowonline k. S lead aad nareary which ac< hady eery (lowly. Haro, tha daily aa. i tha tempo waakiy at 40 haan. far which a UoHt h t i tha "Iowan id. tar urn tarti t3 DUP 0960198 REV. AUG 979 DU 040508 roxicrrv I THRESHOLD LiMIT VALUES OF AIRBORNE CONTAMINANTS sues T*H*vIitSAO*S ITAMOA*BMOC9 lAfirr mwinwa stamoaao AP2X 1221 JUNE 1170 4AN 1272 y Pagotl of 23 Thtt ***** immn requiramema ol to* Occupational gaiety ana Hnn Act at t7Q (03HA) aa euaMwa m the Nomi ftegmer. Q*ma alternation . pnmed in ied. * \S jl M. SCOPf which auy not hove ktin available whra 03HA 1.1 Hue ttaadard provide a Uat af thnahold liasit eaioae ngtiiatiora wars adopted na id and 5.6.1. 23 (TLVt) at air caatiaiiardtp ta provide criteria far tafe 24 Regulated Malarial* Company work etmrancaenL. TLV ie defined is 5.2. 24.1 Ridee applying to tht meaafaetura. pmere* 14 Tka TLVi liatad isi Tablard through 4f irs in*. packaging, handing ui atarapt af that aatcrialt i eaded vaiaaa of tha ALnwaarnican'^foonnffetraencBa of IGorarm. ara tpwiBad is 04HA regulation 1910.1001 - ratal Iwhuoial Hygieniai (ACClH). tad ara reprinted 1910.1229 i with thair parmiaaiaa. lapnhar with tha aceeeipenying ^910.1001 Aabaaua preface, aaa aactisa 3. aad AppaadieaM tltraucb G. Tka r..J..1..9..1..0...1..0..0..2....C...a..a..i...t.a..r...p. .i.l.c..h. ..velatilaa valaaa are reviewed aad puhliahed aaaVally by ACGtH. r* 1910.1001 ^Nkrabiphaayl with tha vaiaaa liatad hara being taken frola the 1912 liev* 1910.1004 alphfrNeptkyiaaune ji I o 14 Table S lira aibetannee far which Ufa weighted iwnp (TVA)tt. eeiliogtt aad paaktt eeragtwdiiera bora beat aatahlhhad Oder OS HAT- Each V thaaa mhauaeaa alas a included ia Table t with tdtrqta to Table S far tha sailing aad peak cai !i M /X APPLYING TLV* a :L1 Masy lioutiaBa where mic njhatanose a s* iary regain dririlsd renew byyepecialiatd npann,' isduoaial bygieshaa. aad taaigelaguti to abtaia tha iiartM to daaipa asaawU. trW additiaaaiji la needed oa tha toxicity of other nauriala aad tha health liaaard that way ha aawriatad with thaau aaaaahatiaa ihaaU he aad* with /the HathaU Laboratory fat i Toskoiaflr aad [aduatini Medietas. U/ i'4 Safety peace,atiara ia OK1T4X thaU he fallowed 1910.1004 Methyl chlaronrthri rthar 1910.1007 1. 5-Oichiorabeaodias (aad its tala) 1910.1000 bieOtloreetathyi athar . 1910.1009 beta.*aphihy!anise 2t* 1910.1010 Baaridiai 1910.1011 XAaunotfiphaayl --^ 1910.1012 Ethyiaaohaow 1910.1013 bata-PrepiaLactora 1910.1014 2-Acatrltniaaflaatena 1910.1013 XOiaMthyUaiuwarebanaina 1910.1014 .V^iitwttditthyiaisiaa mo.1017 Vtayl ritUtida mo.ioir laat^iwa Annait 10.1023 Zaetpaie Lead 19^0.1022 Banaaae 1910,1029 Ceka Oita Eaiatnra 1910.VM4 l.X0ihrats3lilaraprapaae 1910.1<A? Aarylaaiaiie q ,--7* C_3 tthaa kindling ndiitanho ameriela 1 24.1. Haw ngslatiara in fat. <'4 TLVt far a gw natariala Bated iaTablaa 1 ail ara quantly abject' Hriptrbiti, At th* thaa af this ratiasim 1 higher (fare roewietira) thaa trahaaa thaws ia 03HA eat aad parte af the anaah i rsguiatiera, Saatioa 1910.1000. Tahiee Z-l aad Z-l. ragalatiaa wars aA|ar assn renew. Caaaalt tha Legal t/Uch ara braad aa 19M AC6IH wises. Far several achar Departaaaat far lab natariala. Tahia 1 taiaaa ara ashamed by adddeaal rtatriariarailriad hi Tahir X whfah h baaed spaa OSHA ngalaciora. S anlis 191X1000. TaMa Z-X la thaw tasse. the Tihlh 1 lining are rofariand te thaaa is Tahia X 244 Sahtuatw ta be. carcinagrair in liatad aad litratiid a hara prevail, or ara aliagad oarabdered by ACClH at* A. Idas, ipariHi OISA lagnlariara hats bass datslaped far 244 A Uat of natarialh dntpntad by tha Da Pant a tntadMr af nslertali. ia adifitfas la thair `nTAa liatad la Coatpray aa aaparinaatal ar auapaewd taraaegana, n TabidZ-l. Thrat awtariaia ara llaltd ia 2.4.1 aad are c-at^nfiranrsd where they appear ia Tahlsa 1 aad 2. la datanainad by the iadanrial Japaraataat (and indading tha OSHA tin), ia insad gaaitarty by tha Oacapatfanal adadbig an appropriate aspaaaie Iwrit. it ihaald ha aated dial ohaapn by ACClH are baaed apaa infacatatiaa Enriwnaantrl Caracal Grasp. EngiBarring Sacrira Dir. Engiaarring Dope n the "TatrianpiB Syaayat Lut**. r Thataaat '* Taaaa t. Ivtl aieaaMl nartawari raaiaa waaaeraiwifjriairtsarQPiaaar aaaoan teia.icca. anant ra a ra> am 1 <a XJ. ft ~rmkr * <* U.t. "pan" n U. aw Ul tuacaMHirraa xa. te DUP 0960199 DU 040509 CONFIDENTIAL APRIL 1*41 S3 TM# Rape Rav Jan 1*7* THRESHOLD LIMIT VALUIt OF AMIORNK CONTAMINANTS s2r Rapa 3 U Ixamptap U.1 Far aubon monoxide axpoaure du>ii| i 10 hour wk4y, 4 dayv par ntk whara Lj " SO pjx*. the Ljff It calculated in| Eqxatiom (1) tad (2): / -ttJW l.yt - (0.7) (SO) jj ppm UJ For methanol axpoaure daring 13-bear workday, S day* par week when Lg 200 ppm. the Lyy it calculated uaiag Equation (1) aad (2)i fi L^T - (QJ) (200) - 100 ppm UJ For dtaethylfecnMaiide apoom during oa thaw workday, 7 dajo par waak wkara (ha Lg 10 ppm, tha UfT w calculated aeing Eqaataeoa (2) aad (J). , _/ 40 \/14-(0*T)\ _____ 1 "(ITtA----m--)m%m 1X2 Tbtaahald Limit Vtlut-Shen Tam Expmure Limit (TLV4TEL) it <ha maximal concentration to which warkan eaa bo aapaaad far a parted ap ta IS auaataa eoatiaaeaiiy without auffaring from (l) imitation. (2) dtraoK or irrtaaraibla tiaaua chanf*. ar (3) aaiaotii of aufficienl degree ta iaaaaaa accident pranaaau. impair nlf-meoe. ar materially laduea work efficiency. prartdad that aa mart than four cxcuraiom par day ara parmitud. with at laart 40 annular batwaan aa. pawn pariada. and prartdad that tha daily TLV-TWA aiaa ia net owtedad. Tha STEL tbatiid ba eaaaidarad a maaimal allowabla aaacaatnuaa, ar tailing, oat to ba axcaadei at any dm* during tha lLminutc axcunion partad. STELa art baaad an amt ar mara af the following mharia: (1) Adapted TLV* ladadtag thaaa with a "C or "oeiiimg" limit. (2) TVA-TLV Sxaanioa Facton Uated in Appendix D. (S) Pmuyivaaie Short-Tarat Umita for Expoaura ta Airhome CaaKcadaaan (Pannaytvaiua Department af Health. Chiptar 4. Art. 432. Rev Jet 2S. 1940**). (4) 05HA Ottaptulaml Safety and Health Sun derda. 40 FR 2307*. May 2*. 1*75.' (S) NIOSH eritarta far reecaamcndrd atandardi far aaropaiianal axpaaurt ta apaeiBa ubetaam Tha TVA4TEL aheald eat ha mad aa cagijmriag daai(n criterion ar aeneidarad aa aa amarpaaiy aapamm laval (EEL). *44 Thmhald Umh Vahm-CaUb (TLV-C) ia tha eaaatMnttan that dwuW net ha axaaadad avaa LffT - 0425 x 10 - Mi ar 0 ppm 0. RRIFACS TO ACOM TAILS* AOUORMI CONTAMINANTS* S.1 thmhald limit valaaa mfar ta alrherM aoaeca, trotiana af aokataaaaa and rapraaaal mwdldoaa aadar which ta ia bellerai that aaariy all weaken may ka repeatedly expat ad day aflar day witkaat admna afln. Barran af wida variation ia iadiriAul maweptihility. kawatar, a anal] pcrooaUf* af warkari nuy exparitnea dlwomfift 6am mm anhen new at aeacaasretiem it ar balaw tha thmhald Umitt a aaaller pa wantage aaay ba aflatad man lariaaaiy by upmlka af a praaaadap mtflthwi at by dmaiopmn* af at oamjiwimiirl USaaaa. 1.1.1 Tata art armilabla (J Oara* Mad 1S *44. l*T*i Am NY AaadSai. lSl.An.ti *M. IMS) tht may ba aaad M daaact thaaa ladlrtAnli hypanutcrpdhta ta a variety af badaaoriai diamtaala (mpimary irntaatt, bamaiytia dnmtaali. ergaaie iaatyatatat, carbaa dMAdt). U Thraa aatapariaa af Thmhald Limit Vtlma (TLVa) ara ipacHhil haratau at fallout. (TLV ta a copyrighted tana af dm ACCIH.) 54.1 Thraahold Limit VaiM.Tlme Weighted Amrape fJXT-TWA) ia the dma-waiphtad avvrapa earn aaatreuon far a aarmai I hour werkAy ar 4<Mier warkwaak. ta wkidi aaariy all warkan may ka repeatedly day adder day, without admrat afleet. U Far aaana aabataaaat. 04. itrtiam peat, only oaa eatapery, the TLV-Ceiling, may ha raievaat. For other aihnanma, ailhar two ar dim catagortaa auy be rairvaat, depending apaa their phyeiaiagic action, h ia important la ibaerra that S any aaa af thaaa thraa TLVa ta aaooadod. a pauatlal baaard bam dui amhetanrw ta ta aataa. AA Tlaa TLV-TVA dionid ha aaad aa galdeo ia the 000 tmi af haalth baaardi aad dutdd aat ha aaad aa flat tins U Tbua waiphud aaanpm permit aacuriiuoa aban the limit prartdad dry ara mmpaammd by equtrataat aeaataiam babnr tha ttmk dartap the workday. U aama ' h may ba parmbaiVia ta oalraliwe tha amrapa 1 far a aarhwiah ratkar than far a workday. Tha hpm af parmladblii tarda 1 ia ratatad ta tha mamuoda af the thrmhald limit mine af a partiaatar tab atone aa pma hi Appaadh D. Tha niauotakip batwaan thamhnld dmh mta pmatiadbta maaiaiaa ia a rata af thmk aod fatamtaia eaam may aat apply. The tmanm by whkh thmhald Umha may ba exam did far ikert parioda ithaat Iptary ta haalth dapesda apaaa aambtr af taetan aack m tha aamra af tha mmarntnam, wbathar vary high aaraaatrxttam - ana far ahert pariada - predaee acuta paiiaainp, whathm the aflSmu an rmouiatm, tha hagnancy with wkidi ki^i aaaaamrattara occur, aad tht dwatiaa af rack pmtadi. All (aman nut ba taken into aratiaa la arrtrtap at a dadaiaa aa ia wbathar a a am Tmma t fvauaa a aa am am aa aw im rear, nan 1 Pam at Neap*, innetwp. PA DUP 0960200 DU 040510 sar Page n t* 1 THMSH0U UMTT VAUfU Oh AMSORNI CONTAMINANTS APaa. imi Titu hag# N* Jan itr> 14 Thraahaid Vmim a-- M Mdukat available i faratturn fro* induknal txpantaea; from axparimantal tna--a and animal ntdfaa. tod. whan peaaibia. from > aMikin uoa of tha dire*. The baaia m which the valuer ere aatabUahed *"T diflar from aubaia--e la lubauao*; p--taction ipina trxpcirmtai of health may ba a guiding (tar far aame, wharaaa reauaabie fradon froca Irritation, narcotic, nuieanrt or othar (onoa of itraaa may form the baaia for other*. All Tha ameeat aatd natura af iha infaoaatiaa avaiiakli for eatabliahiag a TLV vtriaa from aufam--e la aubetaa--t nnaguantly. tha pradriaa af tka eathaacad TLV ia tin takjaet la nrialion and tha lataat Doeumos* utiaa* .ihaald ba aaaauilad in order la tttatt tka taiana af tha datn available for a (foes tuktuaea. UUt Tha' Cotainto hold* to tha opinion that tiatitt bleed aa phyeiexl briutiau aheald bo eeotidtrad aa It biadia< than than baaed an phyakal uapeimeat. Than it inarming aridaan that phjiical irritation nay initiate, prameta. ar nnienta phyakal --piimrTt tferMgh iotafaction with other ehan ini ar bieiagpa (.7 la ipita af the bet that tarieua injury 1* not believed likaiy at a mult af tapoaan n tha thraahaid Unit eon eeumina, tha ban practice la to meiaula ooaotamtloa of ail ctaaoepherie aoataaaiaaM m It n la practical. 4 Than Utaa are banded far oaa ia tha praadaa of iadaauid hygiene and ahaaid ba interpreted aad applied only by a pant trained in thie dueipliaa. They are not iatandat Car uee, ar for nadiflaatiaa far --a. (1) aa a lahtfoa indas af banrd ar toxicity, (2) ia tha rralaatiea or nacral af eaauanhy air pailauoa aaitanoaa, (3) ia cotiaiktag iha toaie pataatial of earthmo--. tatTPpmd axpaearaa ar athn aataaded work periade. (4) at yraaf n dl^naf af aa exiacrag dfoaan n phyakal ooudMeu. ar (S) far adeptku by aeaauin whan working aaodtha-- dUbr (ran than ia tha Unfold Stun af Aaaariai tad whare rahala--ta aad praaaaan dUfor. 4 MNng i Thuu-WaigMad Araraga Limit*. Although th* trim t--i^kad aaaraga aauaaxtratfou pm ridn lit* meat --idhatney. pmtkal way af maahariag arbatm agaata foe nwpltaaca with tha Unite, dura art eartaia auhuarr-- for which k ia laappraprlata. Ia tha Uttar groap ar* aahmam which an p--dewinaady feat acting nad when Ihraahald ihafo ia man tppnpriataiy bnad ca thfo partiniar reap ana Sabauaan wide thia type of napaaaa an bam natnilad by a calling "C" link that ahauid aat ba wandad. It ia bmpfoefo ia than dafiaidan that tha raaaaer af aanpiing to datrraiin nan eompiianeo with tha Until* for each (roup mat differs a aingic brief temple, that ia appiieauia la a "C limit, ia nat appropriate to tha tuna-weighted limit; bar*, a auffiekat number of aampia* are naeded to permit a timeweighted avarag* nanntntia* throughout a complete cycle af operation ar thraapieat the work ihifL (.*.1 Vlunti the aailing limit plana a daAmtr boundary which aaaoeniratiera ahauld not he pamitud to exceed. tha time-weighted aaaraga Unit require* aa axplieit Unit to tha cxeurtaora that are parmiaailila abort tha titled valuaa. The augmitada af than aaawraiara may; ba pegged to the migmnvk af the thraahaid Unit by an. apprapriau factor than ia Appendix D. It ahouid ha naiad that tha tame factera are aaad by tha Caoauittaa ia dataininiag the augaiauda af the ralua af tha STELa. ar whether to iadada. or axcindt a tubman for a "C7 lining. S.10 "Mthr NotaUwt. Liattd labmncm fallowed by the daaifMiiea "Skia" refer to tha pataadai aaatriburioo ta th* aaerail axpaacr* by th* catamaua raw* iachwlng a--a-- mamhraaaa aad aya. aithar by either--, ar aaare ptrticaiarly. by dbect oaatact with Iha anbataaee. Vahiain caa altar ikia abaaryciea. That maariani tailing daaignm tiou ia intaadad t* tuggatt apprapriau miarum for th* pramti n of cutanea-- abaatpdau n that th* thraahaid aat iarmlidatad. Ill Mfriurua. Spatial nnidmtfou ahouid ba griea alaa ta the tppllaatlea af tha TIVi ba mmltu da* haalah haatrda whiah may b* aaanialad wide aepaana n atetana af two ar man aufamancaa. A brief fbeaminn of baal* nnMmtian ia--Wod ia developing thraahaid limit aaian for adxtora. and mathadi far thaar develop aunt, amplified by ipeatfia axampiaa an firaa ia Appendix C 3.13 Nufoamg hartlaulMaa. Ia ooaaai t* Ohragari* (fena which nun n the-- ta bo famed ia ha-- whra iahafod ia aiaamitu anrnata, n tailed "naxara" dam ha-- a long binary af lfoda adram tSaat eu I--gi aad da nat pndun ilgalSmt argiafo diaanao n teak affoat a kept audar raaaaambla natraL Tha ba-- alaa baa* tailed (bialagtaalty) "iaart" latter tarn la laapp--prian ta tha extam that than ia -- dak wkkh dan aat a--k* aant calluiar nuparaa ia th* laag whoa iahaiad ia aidThiant ana--fe Howrrar. tha luag^kn* moke eauaad by inhaletiaa of iiaiinn dam baa tha follawiag charakariki-- (1) Th* trahirouaraaftha air apron ranain iakk. (1) Callage* (an tie--a) U aat loaned ta a tlpdfoaw axtaut. (3) Th* tiaa-- taactiaa ia potaadaliy rertroibk. CONFIDENTIAL REV. ua a 4 V v; -0----u-- at t-- TkaaaaM UH venae tar i r* ecaat a.e. i DUP 0960201 ON - A I' DU 040511 APRIL 11*1 ss TMePage Rer Jan mt* THRIIHOLD UNIT VAUIKS Of AMORNE CONTAMINANTS I1T Page I S13.1 Exoeaain eoaetamiioat at t dans in Am niton air may Mrioaiiy reduce viaibility, may atom iwplaaaanl deposit! in the ay**, tan. and -- paaaa^M (pnrtland earnest dut). or eaitaa injury to the this a* mai mmbraaaa by chemical ar meehanieal aetioa par m or by tha riferout dua deaaainf proecdurw moaaaery for their laaovai. AIM A ihmhold limit of 10 Mf/a', or 30 appef, at total turn < 1 paiaaat quaru. ar S mf/m1 mpirable dun it reeenmeaded for tahnaacn la than eaiafanaa and for which as ipacific thmbeld laaila kava baaa aaai^ud. Tkia Uaut. for a aonaal workday, daaa aot apply la briad aapaavaa at kifhar naoantratieaa. Neither daaa it apply ta than ntouaaaa which nay oamo phwieiope impaimeat at lewtr aaaaaatratiaaa bat tar which a thraahald Unit baa aot yat baaa adapted Save auiaanee particalataa art pro* ia Appendix E. hnpta Asphyxiants - "biarr dates at Vaparm. 1 af puaa tod vapors, whan pnaaat ia kifh aoo> ia air. aot primarily at mpie ttphyaiaata withtit athar aipiiKaaat phyuaiapt affects A TLV aay aat ha rmanmcadrd for each ample aaphyaiaat baantita tha lini^f ftatar ia tha available eayjca. Tha iaiial au aaotaat dbaald ha IA pareeat by cabana ntotr aanaal aoaarpfaaric praatara (aquanfoat ta a par tial prttiun. pO, af 1M mm H). Ammphene deficits! ia O) do aat provide idcgraii wacaiaf tad neat Maple atpkyifoali art ederiaca. Several adapts asphyxiants pratant ta trplotfoa baiard Aaeeoat theold be takes ad tkia factor ia Uaattaf tha oaaaaatratiaa at the asphyxiant. SpadAa axanpim an lined ia AppaadtsF. AM Physical Patters. k > phTiml f--tmrm m kaat, bmmidkvf* hnwl prmmjr* (aliittdi) tad tfc Uk m*y plaaa added ttraaa as tha body ta that tha efforts hen patari at a thmhald Unit aity be shared. Mattedthata act advartaly is manna the lasia raapasaa ad a Althea* moat thraahald toMte how bufe-fo aafocy foataaa ta (sard cgclnt advaraa affects to federate deviation tram aasd eavireonaMi, tha tadety batan ad an athmoam n aat ad aadt a a agotonic ta taka aara at pom drtiatiaaa. Far example. aoemrnmt work at *0*F. ar lemlni aafailns tke tkaa SS paraaat. might ha aainaiihiriid dead hi tha ptapar adjaamaaia ad tha Thraahald Lout . Vahaaa. A1S Btotogto Undi Vaiuae (ILVa). Other < athar tha toiinue aa tha Thiwhald Land Valuta far Mmrtal Mr. manly. tha Mala* Lkah Vahaa. Than enfant topan an anaaaa ad nhattaan (ar their adbne) m which tha wethar nay ha aspand witfaost haaard ta haakh ar waU-hMap at dataamiaad ia hia daaoca aad (aide ar ia hk aahalad breath. The bfoiagie aa whiah tha BLVa an baaed aaa feiaak two kinda at ladematiaa uatful in tha ceatrol at worker r. (1) nearare at the individual worker'i onrail (2) ftiara od the warkar'a individiai aad chareetcruhe mpanaa 'daaimimm at napcaae forauh a tapariar animate ad tha phyiieiafit name ad the worker, aad any be auda af (a) aiuagti ia meant af aaau ariticai biochaauui nacttawBt, (b) tbtapri in aetivity od a critical raiyma. (e) afaaagta ia tons pbyiialafie tactics Mntarmaat at aapoaura auy ha atada by (1) determining at blaod. arias. hMr. sails. ia body dawaa and Qthda. tha mount od cubnaue* w wbicb tba worker wa atpatadi (2) daaanatnaiiaa af the aanoat of the metahoiitafa) ad tha aahnaan ia tinnt aad flaidu (1) dnamimtiaa af tha aaaoust of tha mbnaan ia die aahalad hnatk Tha biele(ie liaatta auy be oaad m aa adjjmn la tha TLVa for air. or ia place af than. Tha ILVa. and thair uiiwitlad proaedana far datamuaias nmpliaaia with tbm. thoold tbaa be tofardad n aa cfltoche ataaaa af pravidiap health nawail* laan od tbo warkar. All Undated lahatanoaa. Maay atontam pnaaat ar haadlad ia iadunriai piananat da aat appear aa the TLV ton la a amber ad lanaacaa tha material ia tardy pnaaat aa a particulate, vapor or other airborne aaotusinm. aad a TLV ia aat aaaamoy. to athar aaaaa aaAdaat i formaties ta mmn dnalapmaal af a TLV, avaa aa a saautm buia. ia aot available ta tha Caanaitua. Other mhnaitmc, at law toaieity, aauld be iaehtdtd is Appaadfat E pertaiam ta naaaam pardauiataa. Thia tot (n wall u Appaodbt F) ia aat maaat ta ba all iaehutus af aat wriurm (P^i- kaawa ta hen pounual Air NMtoa af totem. At the b^atont af nek yaar. prapaaad iniam af tha Canilline far the fenhaomiaf year are bnad ia tha foam af a "Nettna ad Twaadad uayaa' Thia Natfoa paaatdm am aaiy aa appaaaodty added ta the tot Tha aafyutiaaa toaold ba aanaipavli I by mtotminlat avidaan. The tot af Imindtd Quafn fallawa the Adapmd Yakut ba tha TLV haahlat. Vaian totad ia paranthnia ia tha "Adapted" Un in ta ba aaad toriag die pariad fat whfah a ptapaud chaa|t foe that Valaa ia Unad fat tha Natfoa af founded Chacaa. All Lafai Katue. By pablaatfoa fo tha Federal Refiner (Vat M, No. 101. May 21.19T1) tha Thmhaid Limit Vaian for 1MI an saw adBtfol federal auadarda for fodaaaiol air. All Naartnt PatitfobtolV Thia pablcatiaa stay ba rapriaaad pneided that wafafoa paminiia fa obtained 6am toe 3oarcury-Tiwanwr ad tha Caaforaam aad that it ha pahllahad fo to aacircty. OUP 0960202 -- iri4 DU 040512 DU 040513 CONFIDENTIAL REV. a u g CONFIDENTIAL aaroi^igaja8.83l3;;a;jia:Maiil.aj *i DU 040514 - DU 040515 CONFIDENTIAL DU 040516 CONFIDENTIAL DU 040517 DU 040518 APRIL 1M1 TMa Nfl R* Jm 10T* thrumouj umit vauju OP AmiORNC CONTAMINANT* manyt aayi mmi. at* wumyt \m*xt aanfcial - Ran Mam* l?*i***fya *> MUM > MMtft autyt mm Ha laaaaaaom - Mm MMiyl MMltWI IMI fu i - Aoorrss vauks (cqwto) TVA l> ) a|l Tumi Vwm rrn. || 9) am -M-4 10 11 a ioo 40 Ite * 04 It m ia fit I* m a tot a m a ma m a ia a m (i.i. wawaiBii 100 tie ia at ua 1J00 MO UM 400 ij KD 2J01 M tm ft at a mn M at ai 01 ti fl|MM Ma t*H *l IM Ml am Mi At Ml m u MO Si a Mi tm u at ** ia u " mn am * At an ii - m i mM 1 m mm 41 ia as I M IS u- mm m m f H JO ii - am m - m m TM m w At m - 10 m i* iw*. am i aorha * 11 1MCM to aaiaa m U mm t >**** DUP 0960209 DU 040519 sir aaaa u TMPfSNOL0 UMrr VALUKS OP AHIORNI CONTAMINANTS T**4 1 - AOOATID VAUIM (CONTS) It APRIL 1M1 TW Nf. Ra* JAM iat* TWA iMWMMAai - M too o.i m*rr* MrOiMnyt NffyW at ffyoert Mr MB NMr 1M to 04 S OjQB 041 oi 4 34 I 413 04 14 IB $ 0.1 f r 41 M 94 1 0.1 41) 1 3 B B 14 0.1 0.1 tm **mtn tm. t 0) *A m 14BB * Ba 1A m - IB I 14 s 14 m Ml ii a IB 40 u US 00 11 B -u *1 4a _M -- 04 - 04 4A a * I ftyWOOB I MlHMl (I. f TO 04 - At 0 At - M 1> B w$ 1JAA m MB A 400 0 lit IN IBB MB -- m$ bomb m OB) utmm uu m on) OOMI mm C Mm nymnm TWA 4M r vAft AIAL 1QB I4B IBB m IMA '** IJM 1.M - I 1 IB IA 0.1 04 J 14 19 4t a IB a 3 3 90 11 - OBBt - IB t.1 u - 0090 -M i MB 140i -u - 10 IB - - 041 04 UB 04 B 10 94 r 1 3 i_ * u tj 1 1 - 4B4U 0.1 U - 949 - Ml _ - Oil t 01 04 10B 01 0.10 ta ** - ua# OB IS ta - IB 14 m 040 m - ia m c IjOBB 94BB 1JBB 74SB 1 m A 1 B3 ta ia lilt OTO 01 04 U 1 I a a 40 941 01 la 03 - 10 JB B IB - u - 94 U V W o o i IBr M w DUP 0960210 _________ I * 'Z DU 040520 + u AMli. 1M1 TM( h(l Nov Jor ItTt Town* OStiaSIWtll Tnkawai A wmiMi ( Ta) TaMumtit haaStarMt. m T* 7 - (MO '.C TatvMoyM 1.1.1. J.TatrMOarM. UkMWM Mwmnm 1.1. U.TawMntor. 2 ac THClMt1)IOH. am (atnuaraatmnam - Mn To * Tanamyt m laa ^) - TaonWatms * Taanaik mm m* (* * TM0UH0U) UNIT VALUU 00 AMB0RNS CONTAMINANTS TAtU 1 - Aoomo VAUIIS (COWTO) IIT *oo ta TWA a) MM 10. A* KM Tf tm _m_m_ *) mm/m*i - THOOWWOI i. A >Twmmrom 1.1. (.ttmoimo . tt. tntmnmnwm Toimoo-- 1 SOI rjoo 71 ISO IS S 1 10 410 1400 IS 10 alas ijoo rjoo 1 a MMonicmmoW. tm MtlW MM t. 4. Aiyamtmmnyu is as (.1 - 14 - iio 04 10 04 9.1 a- 04 i- mm u 3 10 wo 04 s A OOHA lad*'WL Mn M1AIS0 M Ttanni an TWA ASK HtfSai* Tl mm twa oan #/ UM TWAUUM* u Ui m mK mm *-AAVW| MM (1.1001 40 m m m 0.1 la K 1 (Alt) x as is - - as so m 14 as IS 4m m m C m-KOK a. '-Aa XyMm - Mo Sim man <a co 2m tan mm laa m Li as i i IKM 1 ( I is m s a 10 n 10 A own atuaaai. laaan 1(10.1(1? Mat: vtayt atiwnoa TWA i I m. H laa mm 0 Mr am* iMaoun aanaa DUO 096021 I 'J * DU 040521 DU 040522 CONFIDENTIAL DU 040523 tar THRK8HO10 UNIT VALUE* OR AIRMAN! CONTAMINANT! ARAB. 1M1 | TMO OefO *0 Jan isrt + U < :i T*M " nonet OP WTTHCtO CHAXHM - MNSUL ourrt tit--I tut * AMAH AflwalM Owyawtt CiMMaMa TrantaMa Omar forma gatornacaaua aann, mmi Sitca^ amorpnotia 03 near (at, ai a ntara/aa. Ala CS near/aa. Ata as near/aa. Ala 2 flkatm/aa. Ala 1J ne/m*, Haaalraeia tuai S mo/m*. ratal auar (an tamaiad natal 2 m*1, Haaatraata dual S ua) " Tale (flbraua) as near/aa * lit IMW 5 52 CONFIDENTIAL tarm t - Aim TWA, emu, amp rtm proouro unrot. rt t-HewH** ^aM t*,AR Sttnall*tt,n,-- *fnwT Crikt ---------- ,r- MaaMHM anoma (m4i larylHxn an* SaryUMi aomsaunM tarjM CMwm fum* (Z37J9 Caaniawi auai (2VJ) Carton AauiMa (237.3} CMM mmmHWii (X37.17) BKytwa anremtaa (237.31) enymna awManat izsrso Hydro** nuanaa (STS) Ruanaa at dual (237JM Mate* cMactaa (Z37.lt) MadfMne amarlda (2V.Z* Orstna (atqri) Mercury (ZVSCS Ryrana (2V.1I) TruniareaHelena (Z37.1t) TumMorwaiyMna (237.28 Tantana (ZV.12) My*tian Mua CZ37JS Maramr (2VJI CMwda aetd tad ehreauiaa (ZVJ) 10 t*w 0003 */n* act iwana** 0.03 m*rta** 30sam to ppm som to tom 3 ppm IS *dAa* too ton 200 MM* asm m***" wo 00* W0 MM W0 MM 100 SOM* ossmrm** OOSmoMi** 2S MM aaodaif/m* as wfiM* as 30 MM 2S mm 30 MM too mm 200 MM 1000 mm OOt mq/mf 200 SOM 300 StM 300 MM 300 SOM 20 SOM 30 SOM OjOOS MfAs* 100 SOM 9*m 30 SOM m ppm 300 SOM 2000 SOM *00 SOM 300 SOM 300 SOM 100 SOM SO SOM 10 wwaa 30 ndnuMO 30 MUM t mtn in mtf 4 tr t MMM S min in any 3 nr S mki in any 3 Nr S Mki In any 3 Nr S Mn In any 1 nr t m*i In any 3 Nr 8 mM in any 3 Nr 10 hm anaa/aty 10 HtMWM Mas-- f Tails * tuaaa an aaaal ta ar mam pom* rnrnmmm mm tmm trmmiimm unaar OSMA lasgluina. In-- taiAMOA MKI ar tt ' * Hull raMat mm mm igagaaa tmm mtm tmm m Ua nurantia W X mnm mmm m tqmt atm mt Mariana mi iwMaao acrm vauaa hm m Tmm t. ** it wan-- *V)t t m tmm mwmm nan mm DUP 09602M v. t* DU 040524 confidential 97 Ci & AMR. 1M1 ? V TUI* Ngt Rev Jan 107* TMMWOLO LMIT VALUES OF AMBOANS CONTAMINANTS I2T 17 APPCNDOC A CARCtNOQSNS Tte (*wlitin Una bale. ibaaa eabrtaia: in btdanrial an tbat hove ptvaaa aareiaafoma in or hm inMeed eaaoar ut tailI aedar appropriate mpar-ata! oaodiboeaNfmaat Uadaf af theta rah aim careiaopaie for man taka throe farm: than for which a TLV kaa kata teamed (la), ikoat far whkh annio--atal oaedition ban oot ban nriSeieniJy dafinad la anivi a TLV (lb). and (le). dnn where latnilianiat af a TLV ia awaitiac mra daflratrra data, and kraoa abaald ba treated aa a lb aarm--pen. Ala. Humaa CaiebMtant - SabMaocaa. ar rabMaew niatad with iadaatrial ptaLattai. raeepuatd to ban aarcinofeaic ar oacarcinoftoic potential. with aa aatipned TLV: ** Atomic triealda prodartiaa * Aabanoa, all farm* bb (QUaramethyl) atbtr Chromite ara pteamia* (ehrmaba) Niakai ealftde raaaca* fmtb* PardmlaU PelyeyaUe Armada Hydniithiaa (PPAH) . Vinyl Oioride TLV (AajOj, OAC p'm*) m Aa (SOj, C SJ) ppaa) (SbjOs. OA a*/** (aa Sb)] S flbari/ec, >Sua ia leaftbAAA 0A01 ppm 0AS ug/mf (aa Cr) IA m/* (aa Nl) OA antwt-m bantam aehtMea S ppm Alb. Human Carainafana - Saba-- or wbrtanrnt emaciated bb indaonial praanm. rennfniead ta hm Mrdaofnii pomttial witbtw aa irtfiii TLV* Mbp nt 1 ilidBuHphaijI (pTwylMln) 1 inwiHphinjI AIR. af TLV - Sabmaeaa with neap* aaraitla* raraigmiaa fartkar data ae*aakiB 1.l-Ptbrameetbiaa (Etbyiana dibrarniia) Ferthamb--is lb ar le. aa atprnmt ar eon. tact by aay nau - raapiritery. akin ar oral, aa detected by Iba amt wadm method - ahall ba permitted. "Ne mporare ar aemaet' man barotitistip the praam ar aparatioa by the ban practicable enpinoenaf mtbada. Tba worker abooU ba praparly eqaipped la aawn Tiraully na camaet with tba earriinput. A2. MaaMal SubMattaoe laiaaat el Caraknianio Potential Mr Man. Q--ini eaketaama. ar tabmam aatoaUtod wtlb iadtrritl prera--. wkfch arr impact af iadmia* --nr, band oa ritbar (1) lisalad epidaatlnle|ir eeidntce. exciearu of clinical lapan* of >ia(ii ilia, ar (2) dmoavatien of carrinagianW in aoe ar aara annal ipaciae by appropriate antbeda t-Aanaa 1.2, Atriaaoir ** Aadmaay triaaida 0A5 mp/n> Bamma ^mfpyrma SeryiUm " Cadaim aalda pradactioa Olarafarm Chromatee af load and aiae (aa Cr) LlMMablatabnuddlm Dimrtbykarbamyi dhleride 1. lONmetkyi bydraiiaa Dimethyl eaifee ITiMlilnfhif Jim Haoaaiatbyi pheaphcrm'fa - SUa Hydranaa Lm4 duMMt 4. CAfatbyiaaa bit (T dila--IBaa) - Skin Manamatbyl bydiadm C 2.Nimprap-- NbmaaaMia Pbwyi bati aapbthylmiin 10 PM - 0M mg/m* 10 ppm OASa^/m* 0A ppm OJ ppm * PP - oa ppm 0AS mg/mt` 0A2 ppm 0A ppm 19 ppm - bate- Praplalteiana Vinyl qalabmana diacida ZMa (aa Cr) . 10 I-- OA* ug/m> Far tba abate, worker aapaaara by ail lautaa ibaaid ba aaraAdly mniM ta iarala aeminest with tba aamal and bun azpariaaaa data (ne Paaimanatiaa), tbaaa mb-- with a lined TLV. OUP 0960215 DU 040525 LalfeI.i.i.^:.fci:lL,U ui.iiaga asaaafflia. iiiii'NTiilii mm at Papa il i a TMRISHOLD UMIT VALUU OR AUtPORNI CONTAMINANTS ' APRIL 1H1 Thia Oopo Now Aon itr* AX OuldoUnao tar ttM Ctaatilteatlan at bpartmontai Alditol C4MlnaMM> The fallowing fuidtlian ui ofltrtd the pcoaeai data of knowledge aa an dd in ciMiifra* mbMM la tha oceopatioaal an* riioaatnt found to ha eaidnoptcdt ia axparimaatal anuntil A naad waa fait hy tha Thraahiald Limite Ccauainaa far aoek a ciaaoiflcotiaa ia order ta taka th>i fine mp ia drraloping an appropriate TLV far aaiapadaaal axpuaiaa. CXCKRTIONS: Ma auhatanra ia ta ba eaoaidarod an ocaapatioaal eardnopa af toy practical rpjflaaem which raarta by tho teapiratory roan at or abaia 1000 tap/m1 far tha aauaa. 2000 np/or* far tha ran by tho darnel mate. at or abort 1S00 np/kp far the manae. 3000 mgAp far tha rtlt by tha paatnim taathal rooaa aa or abort 300 a^tyd far a lifetime, opuiraltat to cheat 100f TJ>. far the no, lOp TJ>. Car tha maaoa. S u v w OoteonHtatkn at Approximate ihrwhaW at naaaanaa RoquIramanL la order ta datanaiaa ia which category to altttifr aa ampa animal ear- duaftn far tha purpoaa af aa iadtutrial air liaiit (TLV). aa apprtaimata thraahold ef aeoplaatk mpoaaa mat ba determined. Baaaaaa af practical emperimamul diffiealtioa, a pradaeiy defined thinahold cannot bo attaiaatL Far tha pwpetaa af ninlaidnuiiif thia ia of llala aaaaaaat, aa aa apprapriata riak. or aefety, factor cam ba applied to thu appaeximata thraibald. the aapiadi af which ia ikpandaat aa the dtpae of potency of the eaidaepiak fatpanan. Ta ofataia tha baaa '`pnctkaT thraabald af ontpiaatm nepoaea, desape dearamian ahooid bo lata than lopirkhatk. Thia baeama partkalarly b> portaai at lamia parar than 10 ppm (or oom> pondingmp/m*). AinriMndy. after a reap finiffaf dramindke baa baaa made by Inpuiihmh ihnaa. cw adilrt--al liiwipa Wait ara nqOict aiikia tha lewtla of "rffwn" aa4 *aa iffwt" w ap> prniouu tha traa thraahold of naoplaetk raapanf.i. That# ijnrap limitation! rarlodt aaah dlexaae aad trichiocothyiaae fro Eaampkn Diaxaaa - rata, hapaloeaUmlar aad naui oanora Item 1013 o^ltp/4, oral Tfkhlaraathyiana - famala aajoa, tmin (30/M 900 ap/kp/d), oral AS*. INDUSTRIAL SUSSTANCSS OR HMM CAR. CtNOOINte ROT1NCV IN SXftfRIMSNTAL ANNALS 1. A to qwalify aa a cardaopas af hiph at ftdfill aoa af tha thraa fallatinp in M aaktal 2i rwJ CL -- la. Raapiratory. Bkk nuaair (tin (1) daaapm balaw 1 mp/m* (or apanalant ppm) rta tho maptamey mat ia --7 bear daily thraaiphm 11 * * Ha tanaad nap mdd attempt to aataliliah a miaHlia rwiatlanahip between **i"*1 aad nan far animal* If tha mtabolla pathway* ara (mad tom perabk. tha mbntacee ihaald ho timid hJphly aapam ao a emdaepan far aaaL If as awda rektkn a f--ad. tha aaheuaaa ibaald romia liaaad aa aa anperinaml animal tardnopm aaail cridanoa to that oanwry k had Oripaaad ClooalWealkn of biartmontal Animal Ctrdnofom. Sohaunaaa oerantap in tho aa cuaetiaaal ndnaml faand aordaopnk far animaia may bo gmnpad iaaa thaoa alaaaaa, tbaaa af hiish. lean median. aad ktr paaaocy. Ia mhiHr| v--fkw hkOUoramathyi other, aubpam i ran. 0.47 (0.1 ppm) ia 3 yaaaot OS 1b. OammLOlckmamr wbhdnMmokihy ado paining, twiaa woakly at 1 ng/kg body weight ar lam par appHaadon Car a total daaa egaai ta ar Iaaa than 14 mp> ia a bkkpkally laart mhtdot Tiamplan 7, ll.Dlmathyibaan(a)aathroetna - aUn tmaan 04X-OJ ap TJB. In faar 8 aianta of aaaaar k defined aa a aioplaada raaptera wfakhmprmanta,lathaJnd^oatofthaCimminin. ia I Baaa(a)pyrana. adaa IX ng, SX/wk far U aaotba TJB. ii . .* 1 Mr 0 am aaaaaaiaaa a) i aa. aaa aw an iwrama n tea. DUP 0960216 DU 040526 ARRL 1t(1 99 Thto Raa Raw Jan 1t7t THRKSMOLS UNIT VALUCS OR AlMORNS CONTAMINANTS S2T ltd It ss t & OR la. QHtialnlMtiMl. Elicit ecnecr by Jiy tanka via the putrainsaattnal tract, within six maatha. with a u-aoath boldinq period, at a doa** balaw I mq/kq body weiqht par deyt total daea, rat, < SO am aowM, < JJ mq: Exoiplaci 7, 13.0iaMthylbaaf(a)antiubcaaa - mammary non Iron 10 m( IX S-McthyidtaUnthnoc - aaon 5 atm ban mg ia #9 waaka Eaaaplm Satyi (beryllium ailicata) melipuat lan( IS mq/nH 17 anatba aluminum rata. O Beufcfiae. vaneas amscr*. rata. 10-20 mq/m* > IS maatha OR lb. Elidt canmr by ikdvpaiimnq of adaa ia twioa weakly daaaqaa of > 10 asq/k| body weiqht ia a biaiaqicaUy iaarl vehicle for at laaat 7S weaki. La* > 14q TJ). Baw(a)pyrene. mice. ).9 pareent laukoiac, from SO B( TJ). 19S day* 2. Elldt cancer by all tbna routea ia at laaat two animal apadea at daaa larola peaeeribed far hiqh or iotmediate potaacy. M0U8TRIAL SUSSTANCIS OP INTWMI0UT1 CAHCMOOCNIC POTSNCY IN IXMMMSNTAL ANSUU To qualify aa a aaminofta of iatamediau pouacy, abould elicit cancer ia two t daaaqaa latamediate between tbaoa la Ala. aad ASe. by two routea af adminiatntaan. Examples Carbasic acid Etbyi Eater Dermal, mammary man, miea. 100 pmaairt. aa w--lra. 300--1400 atf TA Caanaiiwiidaal. emrioua type amour*, mice 42 week*, S20 aeq TJD. Caatroiataatinal, mrtaaa type tmaan, rata, 0 weak*. US-fSO nq TJ). INDUSTRIAL SUSSTANCES OR LOW CAR* ciNoauoc rotsncv m sxrmimcntal Shalatar. aida omc 0.1ml xS0-qTJ).S9/M Anaait triexida, ma > date unknown, but eatiautad ta ba hiqh CaabaMaetdai. Elidt aancer baoi daily oral daaaqaa af SO aaq/kq/day at paatar ; tha lifatmo af tbo aahaaL ARRSNOH SUSSTANCIS OP VARMILS COMPOSITION SI RalytaValuaraathytaM* Daoontpartlon aata. Tbamal dmaaipuaklon of tha fluorocarbon ia air laada la dm famatiea af aaidimd eeatainaaq anrbeo, tbaarina, and nyp* tbaaa pmdutta daaampma ia part by bydralyaia ia alkaliat aadatlaa. tkry caa be qua* tletmly daaaamimd to air aa fleirtla te provide aa lodes af mpeeme. No TLV ie rmaeinoded peadinq dotarmiauian af tbo Mikity af tka proditcti. but air abaald be minimal It OlSSllH. Tin mmprur'ktn af fatciiaa rarlm paatly aad tbaa a aiaqia TLV (ar all typat of tbaaa matariala to ao tonqar appUaabk. la qaamrat tbo aramatac bwaiaa abat TLV ap> CNFIDENTI/\1 To qualify m a ttreiatqgi af taw paueay, a aabmama ibaeld altalt earner ia ana ainurl apariaa by aay am af tfaroe raalaa af adatlnirrnrlna at the Mlewias pramibad daaafaa aad aaaAiasn is. . CUt oncer (rmn (1) paatar tbaa 10 mqfe* (ar equivalent ppm) tie tbe mpiratcry met ia b-7-hcur, dally nptttarf UulitlNttpmw* far 12 maatha' mpaaore and 12 maatha' obiaoiatiea periods or (2) ban iammahaally adanidalared daaaqaa taulinq mart tbaa 10 mf af par* timlasa ar liqdd par 100 ml or man af i raaptrmary raiment maid be determined to arrive at tha appropriate TLV (Ilkim. et *L AIHAJ 24t99. 19Mb Rudao. ibid. S4. SSS. 197S). S WaWiaq - TMai RartkukM (NOO" TLV, tmqAa* aldlnq fimma aaaaat ba ilaiaifiad ahaply. Tha maapmlriaa aad guanaicy af bath am dapaadant an tha alley beMq welded aad die prate aad aim* and. BdlaMt aaaiyib af tarn aaanat ba i arhheat aeanjdartoq tha oeaue af the waidiaq OUP 0960217 R 7. DU 040527 s a ' TMNUMOL0 UNrr VALUtt OH AMSORMN 00NTAMINANT9 tm APRIL m\ rt jn im tad ollojo *** ** Iwu aad titanium m an. wlded to a pntaahw, inert ttttotphen iuj> ae tripa. Than am auk nUtinly Unit ftaaa. but an inlanM radiation which can product oaoao. Similar ppicmw art uaad ta aiC'Wtld Mk tlca eraatiaf raiatiniy law ten! of fattaa. Ftmw allays iW in arr-weidtd it oaidinng cnviroooMau which pnurata CDiiiidtrthla hint. end eta product etrhou na owda ianead of aatat. Such tmaa paaraiiy ut oatapaetd of iwwl partkia of amorphous tlam oantaiaiag ina, tripnotti dlicaa tad ether cMiaiUt eooKitatau depending oa tho alloy iwtu involved. Chrcttitaa tad aichti oowpoumh era found la heat whoa auiaiaat await art are-welded. Sotsa ooc lad and fiumond alacuodaa art fonanlatad with Quitidea tad the tinea uaodtui with thaa eaa attain aignifkaatiy awn flotridei than caidos. Batiaaaa of th then factan. ere-walding Immm bwtaaatiy oat ha taatad far ladhriduai eoeabtaanti which an likely ta ha pncoot ta dtumiaa whether pasifla TLVe an axoaadtd. Cnnrlaaiaai baaad au lotii (aw coMBBtmioa an ftusrally adequate if na toe* alaacau an pmaat in welding rod, tettal. or aalal coating nd aoaditiaaa an net aaaductn ta the (onaction of unic pm Maac weldUg, ana with pttoddn muiladae, daat not predaoa txpanuaa iacida the welding haiiaat than S */*. Thai whiah data, timid bo eawiulbd. AnnNoa c - hhtvmi C.1 Throehoid Uadi Vatua* lor MMuraa When two er man haaardaaa athataoaai an precant, their nahiaad affect, rather than that af tithw IndMhtaily, ahoaid ha (ina priteary aaaaidcratioa. Ia dw haaan af lafamatiaa to tho at fry, tho aSana af tho difltml hatarde dtouid bo tewidared to addithu. That it, if tho mm af tho fallowing freetieeie. ordinarily ia cstoadtd aaly whaa at laaat ona meabar af tho tariao Si Ct or * aw Tl Tt itaalf hat nlua aaeatdiag unity (taa Esaeapia lA-e.). Aataganittia action or poteatialiaa awy aocur with caw oottbiaalwaa af ataoapharia rnnuteintau. Sudb nooa at pmant Mart ho dnaminsd ladhridaally. Petes, liadag ar antagooistk agaan an not nacaiaaiity harmful by thamwlna. Potentiating affacta af aapotan to tuefa agoota by noaw ethm than that of iahalatiaa ia alaoJ poaaihla, Irohihad ataehoi and inhaiad aareotit* (triehlanothyiaaa). Pateaaiatien ia ekanetsriaiically aahibited tt U0t ttaaontiationa. laoa probably at low. Than a pna operation or preeaaa charactorktieally atttoaaattbnafbamAddaan.ftttwa.npon arfawa.il ftoquntfy will bo only faaaikla w atwanpe to araluate tho haaard by nootoranaot of a tiaglo tahateaca. la mb cam. tho thiwkold Uait aaod fee thb whatmeo ahaaid bo nhaaad by a suitable foator, tho ougaifede of which will dapaad an tho outthn, toxicity tad radativt guaadty of tho othor aootattbiaau orttoarily pmooL Faiwplte of pnoataw whkh an typkally naaciatad with two n awn haittfal atttotpharia eeateainaaei an aiding, autonabila repair. blasting. panting, laoqaniae C.1A bandto* at TMNMHOL0 LMfT VALUM PON MRTUmU Tha fallowing fbiwdao apply only whaa tha aaoopraam ia a auatan hon aaaiiar taaiaaiepa affaataa thay ahaald oat ha oaad far aiattm with widely dUbru roaatiritiaa. eg. hydngta ejoaide tad adfhr dieaida. la atnh can tha fomola far Indapcadnat EfBwta (lAa.) dwald ha and. 1A4I (Tnanl taao. trhon air ia aaoiyoad tar aaeh CONFIDENTIAL >00 VJL \ \V at tit uaity. than dw thnahold Unit af tho fattan dwald ha cooaWhral at feiag aneadad. Ct iadkatea tho cbeerretl atawephoria aaaaoamUaa, and Tt Ota commanding thmhald lhait (an Eiwapla lAw. tad IA*.). Eaoapdoaa to tho ohon role awy ho oiado whaa than ia faW maaa to belion that tho chiaf affteta af tha dSanot hatteftd athnaona an oat la fact addidn, hot iwhopanritn w whan purely laaal aOhate aa Afferent oryaaa of tha body an pndaaad by the variant aon> poaaata <f tha mixan. la aach anew tha thmhald Uadi a. AddMra Btoata. (Natat k it aaaaobal that tha amaapbtra ha tntlynd hath faalitatfniy and gaaatita* tbaiy (or aoch wwpaaanr pmoat. in ordn ta anhtau oootpUonao or aooniaipllttwa with thio cafaoUwd TLV.) Ct Cf Cs T, * Tj * T| m` DUP 0960218 banplo Na. 1Aa^ Ak nataiaa 4M ppaa af aoawaa (TLV - IMt ppa) ISA pptt af wthatyi aaateta (TLV 200 ppm) tad 100 ppn aft ban an (TLV 200 ppa) t: i.r DU 040528 CONFIDENT!/\L 10} 2; a: APRIL 1H1 TWO Nft Mr Ml ini THIUIHOLD UMIT VALUES OF ARIORNE CONTAMINANTS 2T <T A--upheric eonnatntiea of nature 00 *> ISO 100 *30 pin of nixurt 400 ISO 100 W + 1m+loo-04 + ws + OJ-ua SOW or (1300) (04) ** *q/m* it hapeaae SOW ar (1100) (04) W it neiipi dtietefam SOW ar (1S00) (04) aaSOOng/fet ia parchioraathpiant Thaaa vulun eaa he eenumed to ppn n faHnrat L \ IV Threehold Unit if bmM. IAA. Spoolcl MM wkta the aeuiee af aontfaiaant m a liquid nixton aad tin emnpheric oenpnitien ia aeetpwd to ha dnilar ts that af the oripaal naurial; uqTau a tima-ri|hed avsraqe exposure baaia. all a* the liquid'(tolnot) nature eveosiallp enporatae. . Additive afTecU (apprexiuuta aoiutiaa) 1. Tha paratat eonpetition (bp weight) af tha liquid austus at hurra. tha TLVt af die aouftinaatt nail ba liatad ia a^/at1. baptaaea *50 aaqha* x 04S 1&2 ppn nathpi ahiorafoeae 410 nq/at* x 0.10 70 ppn penhlaraathpiaMi >60 nq/n* x 0.1S - J9 ppn TLV af 1SOO nq/n* - 1*4 * 70 S* 274 t Cffecta. fib aeauliu 0.15 nq/n* af (TLV, US) and 0.7 nq/n* af tulfarie aeid (TLV. 1). 0.1S 0.7 -U 0.1S 1 0.7 TWedaold Unfa ia net an (Nda; b order to evaluate aonplieaoe trith thie TLV, field unpiing iaetmeaiuta tbeald ba ealtorated, b the Laboratory, far laapaaaa to bit pacific quantitative aad qualitative air*upor niinre, and flea to fnetioeal ooceantmieoe af thie nixnuei 14. `/a tka TLV; / tha TLV; 1 a tha TLV; 10 x tha TLV; etc.) IS. TLV lor Mbtwoo 4* Duals Far af hielpqirtllr aetita niaaral dun the far atismn nap ba and. Far nfasnaaenataimOOW aaaatbndfam tafle aid SOW quarto, tha TLV far MOW af tha Bissau ia pnm bp: TLV 1 U <h f. i TLV. + TLVfc TLV. +~TLV. Eaaaeple No. 1: Uqaid aamein (bp w*i*ht) SOW hepuan TLV - 400 ppn ar 1*00 **fn* 1 nq/n* 04S ppn SOW nethyi cklerefom TLV $30 ppn ar 1400 n*/*1 1 eqb1 040 SOW perehlemhyie-- TLV * 100 ppn ar 470 m/m* l nq/n* 0.1S ppn TLV aft 04 04 04 MOO + 1*00 * *70 af thie 0J00S1 + 040014 + OjOOOM 1 - 1MO av'n* OJOOT7 TLV as so 04 * "w* ta TLV eft TLV d! ahaatdbm tMe (paa) - 20 1 (pure) - 100 * 10 300 110 2.7 Fnnrtallp tha an raarnh will ba abtabiad If tha Ihuitaf ia and pretided tha , b tha abere auniple tha link far SOW quarto it 101 Far anathar nhnt d ISW aiUaa, and SOW total 2SW 2SW quarto - TLV (pun) - 2.7 npptf 2SW aaterphaua diin - TLV (pnu) - nppef SOW Ufa TLV (pnu) - 40 i TLV 04S 043 04 2.7 'f 40 * 40 The lfatot far 4SW I nppef DUP 0960219 DU 040529 s2r aaa :a THRESHOLD UMIT VALUES OP AMEORNE CONTAMHANTS APRIL tMI Title hopa Rot. Jo* IITf APPENDK 0 MnriulM Eaenrelona tor TVwWaietNad Arango (TWA) UMM Tit# Exeurtien TLV Factor ia the Table autematieally deflate tha mafnitadt of (ha penmaatble excartioa there tha lixtit for thorn tubMuica not given a "C dtiipatinm La, (ho TWA Uaula. Exmxplm ia tha Tabla thaw that nimbenaant, tha TLV for which ia 1 ppm. thnaid oarer ba allowed ta axeead S ppm. SlmUaily. carbon tetrachloride. TLV 10 ppm. iboold noaor Im allowad to exceed 20 ppm. Bp caatraat. thaaa mbttancm with a "C" dmipaden ara oat aubject to tha aacanaaa tamer aod awa ba kept at ar baiow tha TLV ceiUnf, Iliaaa louting exeartiaoa era to ba coneidartd to ptwvidc a "iwlo^fthmb" fnidmao for lifted mbraaaea panorally, and map oat provide the amat apprapriata exeunt* for a particular ttihotaneo 04. the potouaebio amoiaa far CO ia 400 ppm far IS mioataa. For appmpriata exeuniom far 142 mbwaaom mncnlt Paanapinaia Rulm t Rap. Chap. 4, Art. 432, (aoo AT), aad "Acceptable Caemmrnleoa.* AN3L N'nnbimim Carbaa twrmhlttbh Trtnaatyl baaaeaa AmM| Bmrmm rlflwrtfc otytaaaiaa TUf 1 w s C1 cs 9mm 3 2 LS U--S - bevratofl Fscton m mm Vmm 2 a ss 1SSS t s The touaolofie importance of amaicaurp peak oonceniratiom dapanda on whether tha tubatonm ia faat ar alow acting. If alow acting, aa far qaartz. lead, or carboa monoxide, atomantarp pcaki ara of no toxieolopK aaaoarn provided, of ooana. thap era not aotranemie. On tha othar hand, faat.actinf auboaaam that rapidlp prwdaaa dlaahliaf narcotic. aq. HjS. or intolerable irritation or aaphyi* iation. NH], SO), CO), ar initiate tamhixaliaa - tha orfaaio iaoepanataa. even "iaataittaaeaoa'* poaba appreciably abawa tha pamiadblo axoaiamo. ahaold not ba permitted. unJaee infoanation nan to tha contrary. Othar atara rpeeifle rccardom will ba daralopod ia tha fatten. APPINOa I onto Nutaoneo Pnrtteuittoo'* TLV, 30 mppcf or 10 */* of total dxm < 1Tb fuartx, or. S mg/m* rmpirabla dual Alundtm (A1)0)) Calcium carbaaata Calcium liHaatg Calhtlom (papar liber) Portland Caotent Corutdam (A 1)0)) Emery Glycerin MUt GrapMta (ayntbetia) Cypam Vapatabla oU abate (ooowpt c-tBf. mhais Nt or Witf IrHim oils) Kaolin Tiimaatat* Mafamlaa Marble Mineral Wool Fiber Paataarythrhal Flmlar of Facia leapt Silaaon SUioao Carbide Starch Tin sstdn Thaaium diexkit Zina Startle Zina enide dm For all whanon not bearing C eautioa (p) Whan taxia pariliac are aot prcaint. a** gnartx TLV > #-I (ppm or mffmft. Cmmrim Fmmr 1 TLV >1-10 (ppm or mjmt). Imariao Factm > 1 TLV > 10-MW (ppm ar owfat*). Imaadoa Fmior - LS TLV >100-MM (ppm ar Immwm Famar -IAS < 1Tb. APPENDIX P boom atmpto AaphystanU** Tlie mnobnr af timee the axmrclao above dm TLV ia parmiaad ia povamad by mafarmlty with dm Timm Aeetyiaam Arpa Hybtpia Matbccm Waifheid Average TLV. Ethane Elhylaaa Prapo-- Propylenx Halinm With inaraaainf ma af rapid. dbntMoadfatf am. iytiaal limnmama far alcbama mntamlntnw in the work arm. the faaMfaaaf ImorpaaMtiaa af aaaattkily "tattoo, ttaaana* paaka arlam Although aa ptoaral atatamtnt cca ba mala maortof all aaanpadanai mbatanam. the fallowing fuidaliam diouid panto hclpfai. aaamninf pack axenaahma ooofeim to tiowwaifhtad ataripa TLV aa atated iboti. (p) At defined in 3.13 APPENOK 0 Calenlatfam far Cami'eraiao af Pinido Cannt Com cantratiao (by Standard Lifht Field - Midpt iotplafar Teckaiqum), io rnppeC to Rmphabla Mam Conoantrauon (by Raaphabia Sanpim) ia oif/m>.t t ~naurenema lowme oracawuw namwaaia T. r. vena. aimaj. m NevOee itar. Mti|r NMMf ClNMflBIRi* If UlfMf a V m/ u-i O C_5 9UP 0960220 DU 040530 AbM*. 1M1 103 mu >h Jn irt thmsholo umit valucs OP AlABOftNB CONTAMINANTS 2T | nl 1. to 1*07, Jwtin and Tanh,t thrived ta eapirkal taiatiaaaMp ef SA appef ta 1 nilligrun af tnpirabb do* par cubic meter of dr, bcaod oa 23 eta af aanplaa, aoedy eaal duet Tba failewinj cakalaliaa raralu ia an aquiraltnea of 6J7 appef ta 1 ap/a* af Mpirabb dun. Una, an ap proxinuM ratio af 6 appef ta 1 atf/n1 af rapirabb dud ia moatiad for esmeniao af TLVa from a aoaat to a naM baaia wbao tba dxnixji and an Median diaaetar bare aat baaa dauntiaaii Is 2. Baaia aaatnptioaat a) Ararat* daeuity foe ulica eocuinisf tea a 24 (aa/on* (2300 a*/ean*). PaiMoary iptificant dud draaitiac nay vary feaa 14 pt/an1 far aoal dad to 3.1 (ai/en* far Portland CananL Silica dcniliaa vary fma 24 (aaMrpbaac) to 24 (aridaballta and tridyaba) 1a:;t u 24 (alpbaquarta) par an*. b) Tba umm Modlan dUaaetar (uad) af parddai aolloctad ia aidfat inpiafar wrapVan and aouaiad by tba aaadard lifbt (laid tadutiqae, and aalladad in a raapirablr Mespkr b tp> praaimwaly 14 ita ar 14 x 10** m Thb aaiipiltin ia, af taunt, fate aibteary ban tba nad af all bad alaatb b fwta variable, depandiao an anay Indtpandrat puanetan. mb aa aauioa af dm. ip af dad aland, matarolofital aaadWaaa, alt. *. Ceteoleriecc a) col par paitiebt 4/3 * r*t r 0.73 x H** a 4/J * (0.7S x 10*4}1 - 1.77 x W-" m1 b) waifht par paitidc * tol x dacatty - 1.77 * 10*" (> ( 2J x 10* Mc/ara1 4,423 x 10** ag/particb e) 1 panirfa/ft1 334 partiaia/m1 (aiaeo 234 ea ft 1 an aa) 10* particle/ft* - appef - 334 x 10* parodt/m* weight af 1 npfef 334 x 10* panjda/n1 x 4423 x 10~* a^/panicia 1 mppaf - 0.137 a*/a* 447 appef - 1 aac/a* ar appiauaaataly 0 apatf " 1 ni/a 4. Equbabu TLVa ia apptf and ag/a^ (raepirabb aaaa) far Miaaral Dmb, \ V C fO,inOENTlAi 0UP 0960221 DU 040531 103 AbRIL INI TliJa bag* ba* Jan 1070 thrkmolo UMrr values OF AMBOftNC CONTAMINANTS str ba#a 1. U 1947, ]mlw and Th,t Aarhrni an mptrtul ralatiaoabip af $3 appef la 1 aull^rw of r^irabla 0*M par eubie Mater of air, baaed 33 mu of Mnptaa, Mostly asal <faac Hu folbwinc aaiaaiatfan raauhs ia ax aquiralaaea of 437 appcf m 1 mc^m* of impirabla Oast. The*. an apprexiauta retie f 4 appcf la 1 c/n* f (Mpirabla dust it wapstad far oonvtnU of TLVa tran a oooat M a am basis whan tha deadly sad Maas aMdita diaaMlar b**e aat bass dsteraiaad. 2. taaie tij a a) Amp daaiky far dliea aooumitu dual* S3 |/m> (3300 m*/sm). Pahaanary upuficant hut daaaitiu Map my r 13 p^M1 far aaa! Aaat w 3.1 paa/at* far Partiand Cawant. SUiea daaeitia rwy boa 33 (aMarphom) la 33 (ariatafcalka mi tridjuits) b) weiphi par particle *al a density 1,77 x 10*'1 cm1 x 33 x 10* Mf/on* 433$ x 10"* Mf/partiria a) 1 panials/ft1 333 partiela/i (ima 333 so ft 1 an nt) 10* paRiela/ft1 " appaf * 333 x 10* particJe/a1 wai|ht af 1 appef * 333 x 10* panida/M* x 4333 x 10** mg/panada l appef 0.137 ap/a1 or 437 i Cpuralant TLVi in aippcf ami mg/mt (rupirsbla aaaa) far Miasral Dm. OUP 0960222 DU 040532