TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5741 - 1Q/23/Q1 Lab Sample No. 62022 Filter Type MCE 25 mm Operator Client Spl. No. 63-6 Filter Area 385 mm"2 z Instrument I.D. EM 10 CRX Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 8 0 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/inm'2.i

Structure aruetur. Type Length I.D. of Structure EDS GO. (Nonasb. No. Coord. No. >0.5 um Sum F B C M < 5 um Chrys. Amphibole Nonasb. Ambig./ND Elements)

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Photo No. (from 1 in S asbeatoi- J_____ L____ dentify all structures using EDS Check diffraction for asbestos store all unrepeated spectra cantaininc aampies) Grid acceptance;! structures up Ito 70a/&in (lat 4) <50% undiasolvea filter, overlapped or' folded Struct. = > O.Sum It > S:1 Aspect Ratio <10X particulate coverage >50X coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5» holes or opaque areas _______________________ F B C M > Sum to laboratory identification criteria observed. ■Unused portion For ehrysotile: Q.73nm spacins for (020) reflections, of filter Chrysotile O.aanm spacing for the layer line repeat, streaking Avoided portion of (110) and (130) reflecUons. of niter Por amphiboles: 0.93nm layer line repeat, and approx. Portion of filter (2mm wide) 3.9 ratio of non-twinned layer line spot spaeing to subject to Amphibole layer line repeat distance (0.53nm). examination

v/= EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Sinsle Fiber (1-3 Intersections = 1-3 fibers) Amosite 3= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25mm fitter Crocidolite Non-asbestos ------- i Stoppinc Rulpp; 1------- Anthophyllite M= Matrll NS0~ No Structures Detected >90 l/G.O. or in Hi 4 0.0. Tremolite Non-Identified U:\DATA\PRIVATE\MlKBG\CADD\rEM3 »/zz/»a Actinolite

NYC-WTC_000174914