NYC-WTC_000208957

NYC 9/11 Public Portal Document

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SUndard Test WethocS for Mscrovacuum Sampling a id Indirect Analysis of Dust by Transmission Slectron Mi jroscopy for Asb^s’los Structure Number Concentrations’ Tm ^04^ tender the lUetf 0 t&c numbBr iwnedioulz the doUnubfl Ipowsws 'Jk or, in the caMoffmifin, iKc >07 o bat rviiisn, A aumbfin pOrtolheso mcUo to lie ycv^Dasi ropxowi. A iiwrioSpt <psikn (<i rfvtciirt ae ediwpisl ctoftge df ce Uw iwi or hopprowjt I 1- Scope responsiiiliiy of ile user o/ihis standard w estai/lisn app'o- i.l This test method covers a procedure to (n) iilantiJy prisu scf&y am! noaiih praetices ami determine the applica- asbestos in dust and (i) provide an eilicaate of the c incen- oilit}' ej rsfpdainry Umrtailons prior to Ute. iraiion of asbestos in Ute sarcpkd dun reported U the 2. Referenced Documents number of asbcilos jcructures per unit area of s^pled surface. 2.1 ASTif Startdartis: 1.1.1 If an estimate of the asbaios mass is to be deter­ D 1193 Specificanon for Reagent Waier^ mined. i.he user is referred to Test Method D 5756. D 1739 Test Method for the Collection and Measuretnsm 1.2 This lest method describes the equipment and ptoce? of Dustfell (Setlleable Particulate Matter)’ Oures ceetssary for sampling, by a microvacuum tech nique. D 3195 Pmetics for Koametet Calibration’ non-airfcorae dust Jot levels cf asbestos situcwrei The D3670 Guide for Dctcnninaljon of Precision and Bias of non-airbome sample is coilecied inside a siandart! filler Methods of Commiaoe D-22’ membrine rassetta from the sampling of a sunace am for D 5756 Test Method for Microvacuum Sampling and dust which may contain asbestos. Indirect Analysis of Dust by Transmisaon Electron 1.2.1 This procedure uses a osiccovacuuming saiipiing Microscopy for Asbestos Miss Conceisliaticn’ uxhnique. The collection efficiency of this techniiiue is unknown and will vary among suhstiatet. Ptopenies infln- 3. TermiBotojj encing coUeerion efficiency include surface texture, ad! esive- 3.1 D^mtioni: neas, electrostatic properties and Other fectors. 3.1.1 asbestiform—aspecial type of fibrous habit ia which 1.3 Asbestos identified by iranspiission electron sieros- the fibers are separable iaio thinner fibers and ultimately copy ITEM) is based on morphology, selected area el snron iato fibrils. This habit accounts for greater aoubHity and diffiraction (SAED). and cne«y dispersive .X-ray analysis higher wasQe strength than other habits of the same mihctal. tEOXAJ. Some information about sirucrure size For more information on asbesliform mineralogy, see Roh detenained. (I)/ (3) and (3). 1.4 This test method is geumlly applicable for ip esti­ 3.1.2 ssbisios—s. oellertveiena than dsserfijos a group of mate of the MBcaKrsnon of asbestos structiues stanlnj .^ora turutaUy occurring, inorganic, highly Ebrou^ silirate domi­ approximitely I MO asbestee streciures per square eenti- nated minerals, which are easily separated into long thin, metre. flexible fibers when crushed or processed. 1.4.1 The procedure ouilined in utis test meilsod er iploys aa indirect sample ptepantion tecimidue. 11 is m(eai ed to OsCusuCM—ItwiuCai in the defiaitioo ice the esMstifonn Nineties □£ sceesdne (dujssUJe). nebccicilc (tiwUalilel: jruBcilB (irunerits disperse assreaated asbestos imp ftindamentaJ fibrils fiber asbouah uchaahyUhs (anchoobrltiw asbestsa); ircDwUlc itremeliic bundles, dusters, or matrices that can ba more aect rateiy isOejw); usd leiit elite (usissUn asteonri The imphlbole mineral quantified by transmission eiectran microscopy. How* *r. as cemposiilonj u« Udtnei aecoialoj to onmcqdatiire or UK iQionuK with al) indirect sample preparation techniques, the as sestos uonil MinentosienJ As»x:u.a9n (3). olnerved for quafitincadoa may not represent the pl ysical AJfcaitM Cbemtcy AtMTwet Scrvi« CpnB of the libastcs as simpled. More spedficall ’-be Oxyteailt procedure described adther creates nor destroys astestos. CiMiaeiiie (30OI-2H but it may alter ±e physical foi™ dr the mineral fiber l Cninciw vxUtioi 1219343.5 Aitilie^/lliu Aibeuoi n536«47-J 1.5 The values staled in SI uaiw are to be regarded tu the Tnnuiiiu AiSeaci 7733^44 standard. The values given in parentheses arc for infprma- Actiaofa’i* xiiMoi 775364^

I tiOB only. 1.6 This Jlanhard dcfs piirparl io u^reis all j/ rA? safety concerns, if any, associated with its use. !t li ihe 3.1.3 single fiber dial cannot be separated into

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NYC-WTC_000208957