NYC-WTC_000208957

NYC 9/11 Public Portal Document

Jun ID 02 Q2;a3p 'l-tB-'J'-.iUKJe; If.j: t2I2)7Ga-a7S9 P- 3

I D 5766 mailer coreponenu without iotieg its fibrous propeni iK or 5. SigatOcMK and Use appearance. 5.1 This raierovacwiin sampUag and iadiresi analysis 5,2 C>^erifiiicv ofTems Sptdfic lo Tki{ Siattdarii: aeihod is used for the gciunl testis; of nothairborae dust 5.2.1 asifta ratio—the ratio at the leojih of a fi^us sample: for asbestos. It is used to assist in the evaluation of panicle ro its av«age snati. dust that may be found oa stir&ces in btiildings such as 5.22 aitieture cotnposed at three or hore ceiling tiles, shelving, dectricaJ coapooenis, duct work. fibers IB a psratlcl atnogetacw with tbe fibers doser than carpet, etc. Ibis test method provides an index of the one fiber diameter lo eath other. eonmimtioc of asbestos stroaures in tbs dim per unit area 3.2.3 cltiiUi^ structure wtU fibes in a random am ng»* inalyzed as derived from a quantiutive TEM analysis. mont such that all fibers art imennixsd and no angle If er is 5.1.1 Ths tell method does not describe promdure or isolated from the group; groupings of fiben, must have: note [ecfinujues required to eviiiimic thu safery er habimbiliiy of thaa two poims touching butUifigs with asbestotcootsioiog materials, ar cemi^innce 3.14 i/eirif-^materials that are of aa amount and size with ftderat sum. or local regufaiiogs Or statutes. It is the {particles greater than 1 mm in dia.-ncetr) char can be vis <aDy user’s respofisifaiJiiy to mabe Ihas* daiarmiaitions, identified as 10 theiJ source. 5.1.2 At present, a auglc direct relationship between 32.5 rfu«—any material CDrapoed of particles in al siw aibastos-eoauinirig dun and pouada! huomn exposure does range of £l mm and large enough to setti* by rinue of heir not exist. Aceordingly. the user should consider these dais in weight from the imiaent air (see defiainon for semi able rclatiooship to oUtr available loformariaa in their evalua- p«xacata« aa«er ja Tea Meittod D 1739). don. 52.6 fibers smcraie iifivinj & mijiinium length o 52 Ibis test method uses the defirntion, senleable partic- um. an aspect ratio of S.-1 or greater, Und suhsunfojiy ulat* malarial, found in Test Method D 1739 as the defini­ parailef sidra (4)t tion of dust. This definition accepts all parades smell 32.7 fiireut—af a nuaeral compased of parallel, Jadi, enou^ to pass through a 1 mm (No. 18) scrsoi. Thus, a aiin^ at interlaced aggtegatei of fibers, from which the filbert single, large asbestos coataiaiag 5*rtici«(«) (*om the Urge are sometinKS separable. Thai is, rhe OTsailine aggriMie end of the partide size diitribution) dispersed during sample may be reftirtd to as fibtour even if It is not cOHLOOSep of preparation may result io anotoaiously Urge issbcsMS coti- ecQbmioa results io the TEM analytes of that sample. Il is. separable fibers, but has that disunc: appearance. The Usrm ihersfote, fecooroended tiat malitple iadepeodfat samples I'btous is used in a general miacnlogicai way to dost nbe arc seoired from the same area, and a nunimum of three aggregates of grains Iha] crysiaSht in a n««ll6-like habit and samples analyzed by the entire procedure. appear to be composed of fibers. Fibrous has a much n ore senerel laaauuttg than astiaaot, WHilc it is carteci iha aS 6. latnfaMces asbestos nuaetaU are fibrous ooi all nuncrals having fibrijus 6. t The following minerals have prope.Ties (that is. chem. . .. Habits an asbestos | - ■ leal or CTjsialline structure) which are very smilar to 3.2.8 intiirea pieforaiion—i method in which a sample aibcaios minenls and may iiitaferc with the analysis by passes through ob* or more iniermediaie steps prior w final causing a false positive to be recorded during the test. fduallOD, 1 Themfoie. liieriture references for these raaierials tnusi be 32.9 otfllror—a struaurt in which one or more fibcri or maiatainad in the laboratory for cCmptritoo to asbestos liber buMUes that an muchias. are attached to, or para eUy mirwaJs so chat they are not misidentified as asSaestos concealed by a single panicle or cocoected group of r jb- minertis. ■fibrow psitkles. iSe ezpoted fiber must meet ths fber 6.11 Anti^^rite, definition (lee 32ri)- 6.1,1 Paiygorskiie (Aaapuigiie). 3.2.10 srrucfw-£i~a wn ib«i 4 ussd to eaiegerize all the 6.1.5 HaSay^iie. types of asbestos porddes wincti ore recorded during the 6.1.4 Pyraxeaer. auelyait (sneh as fifaets. bupfflas, dustera, and matrUj®). 6,1.5 Sepialitt, Final nsulii of the ten are always capnssod in asbctos 6.1.6 yermcuiiie icratb siruenira ptf square cecDrann. 6,1.7 fiiimistatc. 6.1.8 HorobleDdt and other amphiboles other than those listed in 3,1-2. X 4. SuBtarary of. Test Merited 6.2 Colleetine any dust particles greater than 1 mm in size 4.1 The sample is coUecud by vacuuitung a known in this tat method may cause an itncrfereace and. therefore. surface sm with a sabdOKi 25 Or 37 mm air unpling must b* avoidod. czasene using a ptasuc hiic that is anacilitd to the iwet orifice wfiicb acts» a ami*. The sample is inuisternci iHcni 7. MAteriala sim) Exiuituiuut i nside the aucsect to a* aqueous soltirion of known volume 7.1 ^laiiy ofJieageftis—tUa^'^i ga^ chcnucals shall be Aliquots of ''Jie susppasiO'i we theu fthered tbrougH a used in alt tests,. Unless otherwise indicated, it is inunded / rijembranc. A section of the raeabrsute ij'pwpawd that all reageais conform to the spedficauons of the Com- rransferrad to a TEM grid usiag the direct transfer roeiheri. minee on Analyiical Reageau of Ut< American Chetnicai The asbestifonit tzructBras ve Ideodfied. siitsd. ant) ccuhm SoQK7, where such specificacionj are available. Other grades by T£M. usieg SABD and £DXA at a ttaasBifiradonj Of may be used, provided It is Sts astenainod that the reagent 15 MOioTOOOOX I’i or" sufficiently hiiSh purity to pertail its use uiihout

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