Asbestos Project Notification and Inspection Report, Dec 2002

NYC 9/11 Public Portal Document

I®5 D 575S

smaller components without losing its fibrous propenies or 5. Significance and Use appearance. 5.1 This microvacuum sampling and indirect analysis 3.2 Dgscripiiw qf Terms Specific to This Standard: method is used for the general testing of non-airborne dust 3.2.1 aspect ratio—the ratio of the length of a fibrous samples for asbestos. It is used to assist in the evaluation of particle to itt average width. dust that may be .bund on surfaces in buildings such as 3.2.2 bundle—i structure composed of three or more ceiling tiles, shelving, electrical components, duct work, fibers in a parallel arrangement with the fibers closer than carpet, etc. This test method provides an index of the one fiber diameter to each other. concentrarion of asbestos structures in the dust per unit area . 3.2J c/uiZer—a structure with fibers in a random arrange- analyzed as derived from a quantitative TEM analysis. meni such that all fibers are intermixed and no single fiber is fl 5.1.1 This test method does irot d^cribe proocdu^ or isolated from the group; groujMngs of fibers must have more ' - techniques required to the safety or habitability of ,\ evaluate '■ ' than two points touching. buildings with asbestos-contalBing materials, or compliance 3.2.4 debris—materials that are of an amount and size with federal, state, or local i^pilations or statutes- It is the (particles greater than I mm in diameter) that can be visually I \ user's responsibility to make these detenninations. identified as to their source. l\ 5.1.2 At present, a single direct relationship between 3.2.5 dust—ay material composed of parrides in a size I ' isbestos-containing dust and potential human exposure does range of < 1 mm and large enough to settle by virtue of their j lot exist Accordingly, the user should consider these data in weight from the ambient air (see definition for settleable I relationship to other available information in their evalua- paniculate matter la Test Method D1739). '^on. 32.6 fiber—i structure having a minimum length of 0.5 5.2 This test method uses the definition, sestleable panic­ gm, an aspect ratio of 5:1 or greater, and substantially ulate material, found in Test Method D 1739 as the defini­ paralid sides (4). tion of dust This definition accepts all particles small 3.2.7 fibrous—Qf a mineral composed of parallel, radi­ enough to pass through a 1 mm (No. 18) screen. Thus, a ating. or interlaced aggregates of fibers, from which the fibers angle, large asbestos containing particle(5) (from the large are sometimes separable. That is, the crystalline 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 tn anomalously large asbeaos con- separable Ubers, but has that distinct appearance. The term cessatioa results in the TEM analyses of that sample. It is* fibrous is used io a general mineralogical way to describe therefore, recommended that multiple independent samples aggregates of grains that crystallize in a needle-like habit and are secured from the same area, and a minimum of three appear to be composed of fibers. Hbrous has a much more samples analyzed by the entire procedure. ( general meaning than asbestos. While it is correct that all 6. imerferenees asbestos minerals are fibrous, not all minerals having fibrous 6.1 The following minerals have properries (that is. chem­ habits are asbestos. ical or crystalliDC structure) which are very similar to 32.8 indirect preparation—a method in whidi a sample asbestos minerals and may interfere with the analysts by passes through one or more intermediate steps prior to final causing a filse poritive to be recorded durmg the test filtration. Therefore, literature references for these materials must be 32.9 matrix—^ structure in whidi one or more fibers, or maintained in the laboratory for comparison to asbestos fiber bundles that are touching, are attached to, or partially minerals so that they, are not misidentified as asbestos concealed by a angle partide or connected group of non- minerals. fibrous particles. The exposed fiber must meet the fiber 6.1.1 Antigorite. " definition (sec 32.6). 6.12 Pal^^orsldte (Attapulgite). 32.10 strueXHno-latermthatisusedtocatEEJiizeallthe 6.13 Haiioysite. types of asbestos particks which ate recorded during die 6.1.4 Pjeweenes.. analysis (such as fibers, bundles, dusters* and matrices). 6.1J Sqw^te. Fioal results of the test are always expressed in asbestos 6.1.6 Vermiculite scrolls. structures per square centimetre. 6.1.7 Fibrous talc. 6.1.8 Hornblende and other amphiboles other than those listed b 3.12. . 4. Summary of Test Method 62 Collecting any dust paxtides greater das 1 mm in size 4.1 The sample is collected by vacuuming a known in this test methn may cause an interference and, therefore, surface area with a standard 2S 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 traBSfared from 7. Matertab and Equxppiae?'. inride U«s cassette to an aqueous solution of known volume. 7.1 Purity tfReagents—’Rcagmt grade chemicals shall be Aliquots of the suspension are then filtered through a used in all tests. X^less othep^ indicated, it b intended membrane. A section of the membrane is prepared and that all reagents conform to the spcdfications of the Com­ . * nansferred to a TEM grid using the direct transfer method. mittee on Analytical Reagents of the American Chemical KThe asbestiform structures are identified, sized, and counted Society, where such specifications are available; Other grades III by TEM, using SAED and EDXA at a magirification d* may be reed, provide it is first ascertained that the reagent 15p00lo20000X. is of sufiideady high purity to permit hs use without

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