Asbestos Project Notification and Inspection Report, Dec 2002

NYC 9/11 Public Portal Document %||i D5755

smaller componeau without loans hs fibrous properties or 5. Significance and Use appearance. S.1 This microvacuum ■-..npling and indirect analysis 3J Dtsaipiiont ofTtrms Specific to This Standard- method is used for the general testing of non-airbome dust 3.2.1 aspea ratio—the ratio oT the lensth of a fibrous samples for asbestos. It is used to assist in the evaluation of partide to its average width. dust that may be found on surfaces in buildings such as 3.2.2 bundle—^ structure composed of three or more ceiling tiles, shelving, electrical components, duet work, Cben in a parallel arrangcmenl with the fibers closer than carpet, etc. This test method provides an index of the one fiber diameter to each other. concentration of asbestos structures in the dust per unit area 3.2J clutters structure with fibers in a random anange> analyzed as derived from a quantitative TEM analysb. ment such that bH fibers are intermixed and no single fiber is S.l.l-Tbis icst iaethod^locSL^ describe - or isolated from the eroup; groupings of fibers must have more ie<Anlqt«si«priTed^o«*aluateihe safetyor ityof than two points lotidling. bdlding vdth as^aos^audning «• com^« 3X4 materials that ate of an amount and size -wjth fcderalriEaerbrloca r^ations or sratuUS-’it^-the (panides greater tian I mn. in diameter) that can be visually -oserVrcsponsibaityto-inalce-lhcse-dctcnnnratioas;-------->— identified as to their source. 5JX-At |»eient.«a.^ngle direct i^tjonship.±ctweeB___^ 3X5 dust—aay material composed of particles in a size ..^bcstos^tetnisgriist-aadi^^^iwmiA^tposure does range of £ 1 mm and large enough to settle by virtue of their urtcxiA-Xccordinglyrtlic usreSouISron^erfiitsetlatalir"' ........................................ weight from the ambient air (see ---- -- definition for settleablerelauonship to other available Jnfonnation in their cvalua- particulate matter in Test Method D1739). tion. 3X6 fiber—i structure having a minimum length of OJ J,2 This test method uses the definition, settlcable partic­ gm, an aspect ratio of 5:1 or greater, and substantially ulate material, found in Test Method D 1739 as the defini- parallri rides (4). tion of dust This definition accepts all partides small 3X7 fibrous—oi a mineral composed of parallel, ratfi- enough to piss through a 1 mm (No. 18) screen. Thus, a ating, or interlaced aggregates of fibers, from which the fibers angle, large asbestos containing partideCs) (fiom the large are sometimes sparable. Thal is, foe ayjtaJlinc aggregate end of the partide size distribution) dispersed during sample may be referred to as fibrous even if it is not composed of preparation may result in anomalously large asbenos con* separable Ebera but has that distinct appearance. The term centration results in the TEM analyses of that sample. It is, fibrous is used in a general mineralogical way to describe therefore, reeonunended that multiple indepadent samples aggregates of grains that crystallize in a needle-like habit nd are secund fiom the sgme area, and a minimum of three I* ajqiear to be composed of fibers. Fibrous has a much more samples analyzed by the entire procedure. general meaning than asbestos. While it is correct that all 6. ImerferoacBS asbestos mineralj are fibrous, not all minerals having fibrous habits are asbestos. 6.1 The following minerals have properties (that it. ehem« 3X8 indirect preparation—a. method in whieh a sample ical or crystalliue structure) which are very similar to asbestos minerals and may interfere with the analysis by I passes through one or more intermediate steps prior to final filtration. eausing a ftlse poritive to be recorded during the test Therefore, literature references for these materials must be 3X9 matrix--.^ structure in which one or more fibers, or maintained in the laboratory for comparison to afoesies fiber bundles that are touching, are attached to, or partially minerals ao that they are not misidentified as asbestos concealed by a angle patride or connected group of non* minerals. fibrous patrides. The exposed fiber must meet the fiber 6.1.1 Antigorite. definition (see 3X6). 6.1J faJygorskile (Aaopvlgite), 3X10 s/ruertexr—^ term that is used to can^orizc all the 6.1 J Halloynta. types of asbestos partides which are recorded during rim 6.14 Pjmunas.. analysis (sadj as fibers, bundles, dusters, and matrices). 6.U Sepioliu. final results of the test an always expressed in afoeaos 6.1.6 f^emleulite senOt. Structures per square centimetre. 6.1.1 Fibroustale. 6.1.8 Hornblende and other amphiboles ocher than those listed in 3.IX . 4. Summary of Test Method 6.2 Collecting any dust particles greater dan I mm in rize 4.1 The sample is collected by vacuunung a known in this test tucuod may cause an interference and. therefore, surface area with a sundand 25 or 37 mm air sampling must be avoided. cassette using a plastic tube that is attached to the inlet orifice which acts as a nozzle. The sample is transferred fiom 7. Materials and EquqiBKiit . imide the cassette to an aqueous solution of known volume. 7J Reagent grade chemicals shall be Aliquots of the suspensioa B's then filtered through a used in all tests. Unless othn-wise indicated, it is intended membrane. A section of foe membrane is prepared and that all rexgenu conform to the speeifi«aEiOBS of the Com­ . ' nansferred to a TEM grid tiring foe direct transfer method. mittee on Analytical Reagents of the Ameriosn Chemical The asbestifonn structures are identified, rized, and counted Society, where such spedfications ere available. Other grades by TEM, uring SAED and EDXA at a marnification of may be used, provided it is fit# ascertained that the reagent IS«X>to20000X. is of su/Iicjenily high purity to pennit is use without

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