Asbestos Project Notification and Inspection Report, Dec 2002

NYC 9/11 Public Portal Document

<D) D575S smaller components without Iosins its fibrous propenies or 5. Significance and Use appearance. 5.1 This microvacuvm sampling and indirect analysis 3.2 Ctacripiionj o/Terms Specific 10 This Standard: method is used for the general testing of non-airbome dust 3.2.1 asj^ ratio—the ratio of the length of a fibrous samples for asbestos. It is used to assist in the evaluation of particle to its average width. dust that may be found 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 tea method provides an index of the one fiber diameter to each other. concentration of asbestos structures in the dua per unit area 3.2J cluster—a. structure with fibers in a random arrange­ analyzed as derived from a quantitative TEM analysis. ment such that an fibers are intermixed and no single fiber is 5.1.1 This tea method docs not describe procedures or isolated from the group; groupings of fibers must have more techniques ^uired to evaluate the safety or habiubility of than two pointe touching. buildings with asbeaos-containing materials, or compliance 3.2.4 riefuir—materials that are of an amount and size with federal, state, or local r^ulations or statutes. It is the (particles greater than 1 mm in diameter) that can be visually user's rcsponsibiEty to make these detenninations. identified as to their source. 5.1.2 At present, a angle dirert relationship between 3.2.5 dusi—aay material composed of partides in a size asbestos.containing dust and potential human exposure does range of <1 mm and large enough to settle by virtue of their not exist Accordingly, the user Should consider these data in weight from the ambient air (see definition for settleable relationship to other available information in their evalua­ particulate matter In Test Method D 1739). tion. 3.2.6 fiber—i structure having a minimum length of 0.S 3.2 This test method uses the definition, senleable partic­ pm, an aspect ratio of 3:1 or greater, and substantially ulate material, found in Test Method D 1739 as the defini­ parallel rides (4). tion of dust This definition accepts all particles small 3.2.7 fibrous—of a mineral composed of parallel, radi­ enough to pass through a 1 mm (No. 18) screen. Thus, a ating, or interlaced aggr^ates of fibers, from which the fibers single, large asbestos containing particlefs) (from the large arc 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 in anomalously large asbestos con­ separable 'fibers, but has that distinct appearance. The term centration results in the TEM analyses of that sample. It is. fi^us is used in a general mineralogical way to describe therefore, recommended that multiple indepradent samples aggregates of grains that crystallize in a needle-like habit and are secured fiom the sqme area, and a minimum of three appear 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. Imetferences asbestos minerals are fibrous, not all minerals having fibrous 6.1 The following minerals have properties (that is, chem­ habits are asbestos. ical or cryrialliuc structure) which are very similar to 3.2,8 indirea preparation—a method in which a sample asbestos minerals and may interfere with the analysis by passes through one or more intermediate steps prior to final causing a false positive to be recorded during the test. filtration. Therefore, literature references for these materials must be 3.2.9 matrix—a structure in which 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 single particle or connected group of non- minerals. fibrous particles. The exposed fiber must meet the fiber 6.1.1 Antigorite. definition (sec 3J,6)., 6.1J Palygorskite fAttapulgite). 3X10 structures-^ term that is used to catq^orize all the 6.1.3 Halloysite. types of asbestos particles which are recorded during the 6.1.4 Pyroxenes.. analysis (such as fibers, bundle^ dusters, and matrices). 6,1.5 Sepiolite. Final results of the test are always exprrased In asbestos 6.1.6 f^ermiatllte scrolls. structures per square centimetre 6.1.7 Fibrous talc. 6.1,8 Hornblende and other amphiboles other than those listed in 3. IX . 4. Summary of Test Method 62 CoUectine any dust particles greater than 1 mm in rise 4.1 The samite is collected by vacuumiag a known in this test meth^J may cause an intcrftrencc and. therefore, surface area with a standard 25 or 37 mm air sampling must be avoided. cassette using a plastic tube that is attached to Ute inlet orifice which acts as a nozzle. The sample is transferred from 7. Materials and EquipptiSi®*'. inside the cassette to an aqueous solution of known volume. 7.1 Purity ofReagents—Reagent grade chemicals shall be Aliquots of the suspension are then filtered through a used in all teste. Unless others^ indicated, it is intended merobrene. A section of the membrane is prepared and that all reagents conform to the specifieations of the Com­ . ■ transferred to a TEM grid using the direct transfer method. mittee on Analytical Reagents of the American Chemical s The asbestiform structures are identified, sized, and counted Society, where sudi specificatioos am availaWc. Other grades by TEM. using SAED and EDXA at a magnification of may be used, provide it is first ascertained that the reagent ISpOOtoZOOOOX. is of sufficienily high purity to permit its use udthout

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