TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

....J ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5741 - 10/23/01 Lab Sample No. 62030 Filter Type MCE 25 mm Operator Client Spl. No. 71-3 Filter Area 385 mm“2 . Instrument I.D. EM 10 CRX Grid ID. Disk Ho. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70 )

GO. structure structure Type Length I.D. of Structure EDS >0.5 um (Nonasb. No Coord. No. F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Clements) 6’/^ K3 K Z/ 1/ L/i?-------

Photo No. {from 1 in 5 aabestos- Identify alt structures using EDS Check diffraction for asbestos store alt unrepeated spectra containing samples) Grid acceptance:! structures up to TOs/iSim (I a t 4) <50X undissolved filterr ” verlapped or foided Struct = > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50X coverage Totals Ns Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or opaque areas_____________________ F B C M >• Sum to laboratory identification criteria observed. ‘Unuaed portion For chrysotile: O.TSnm soacing for (020) reflections, or niter Chrysotile O.S3nm spacing for the layer line repeat, streaking 'Avoided portion of (110) and (130) reflecUons. or niter Por amphiboles: 0.93nm layer Une repeat, and approx. PorUon or niter {2mm wide) 3.5 ratio of non-tvinned layer line spot spacing to aubject to exatnlnaUon Amphibole layer Une repeat distance (0.S3nm). v/s EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) ZSmni nitar Crocidolite Non-asbestos U- Matrix f ------ 1 stopping Ruten: I------ Anthophyllite NSD= No Structures Detected | >90 a/G.O. or in tit 4 0.0. Tremolite Non-Identified U\DATA\PRIVATE\MIXBC\CAODVEM3 9/22/ga Actinolite

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