NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB 3RC7; a ^■5? - LO '2 Lac Geme.5 Me. F-.-er Ty-pe mm CperaLc / <.^r' Clienc Mo . FLiuer Are-; 3 35 mm'

Inscrumenc I.D. EM GRX Grid :.D Disk Me Screen Magnification 16,4 0OX (GO) Area 0 mm Comments Acc. Volcage 9 0 kV No. GG co be i 4.-21 rue: GcrsDC 3 'mm

Length I.D. of Structure EDS GO. Structure structure Type N or (Nonasb. ^0.5 um No Coord. No. F B m cI < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) 7 .:7s 2-- J

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1 Photo No. (from 1 tn 5 asbestoa- Identify all structures using EDS Check diffraction for aabeatoa Store all unrepeated spectra— containing samples) Grid acceptance:! structures up to 70s/i^m (1st 4)

Struct = > 3.Sum & > 5:1 Aspect Ratio <5OX undiasolvea filter, overlapped or folded <IOX particulate coverage >5OX coverage Totals V= Not Obaerved (EDS ■pectrum er diffraction pattern) at least 20 unfolded or overlapped grid squares yks Poaitlve diffraction pattern properties conforming <5X holes or opaque areas F B C M > 5um to laboratory identification criteria observed. ■Unuaed porUon For cftryBoUle: Q.TSnm «iipacinr for (020) raflactlons. of filter 9.S3nm apactng for the layer line repeat, itreaklng Chrysotile 'Avoided portion of (110) and (K .30) refleeUens. of filter For amphiboles: Q.S3nm layer line repeat, and approx. ' / PorUon of filter (2mm wide) 3.3 ratio of non-t*inned layer line spot spacme to I 1 . subject to examinaiion Amphibole layer line repeal distance (O.SSnmj. k EDS spectrum eonforminc to laboratory identification criteria observed. i AMPHIBOLES Ambiguous Fa Single Fiber (1-3 intersections = 1-3 fibers) Amosite B- Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 2Sinm filter CrocidoUle i Non-asbestosi Us Matrix 1 Stopping Rules: -------- Anthophyllite ' i- NSOs No Structures Detected >S0 i/G.O. or in lat 4 G.O. Tremolite I ,, , . .... , Actinolite ' Non-Identified ! L\DATA\PRlVATE\i<IKEC\CAD0\T£M3 9/22/98

CITY_21MC100_002849275

NYC-WTC_000209917