TEM asbestos analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5741 - 10/23/01 Lab Sample No. 62009 Filter Type MCE 25 mm Operator Client Sol. No. 50-7 Filter Area 385 mm^2 Instrument I.D. EM 10 CRX Grid I. D. 7 Disk No. Screen Magnification 16,400X (GO! Area 0,011^4 mm ^2 Comments Acc. Voltage 8 0 kV No. GO co be Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/mm’^2.)

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

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Photo No. (from 1 in 3 asbestos- Identify alt structures using EDS Check diffraction for asbeataa SLore all unrepeated spectra containing samples) Grid acceptance:! atructurea up to 7Qs/^m (tat 4) <50X undiaaolved niter, overlapped or folded Struct. = > O.Sum & > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5X holes or ooaoue areas F B C M > Sum to laboratory identification criteria observed. •Unused portion For ehryaoUle: 0.73am spacing for (020) rsfleelions. O.S3nm spacing for the layer line repeat, streaking Of filler Chrysotile Avoided portion of (110) and (130) reflecUons. of niur For amphiboles: 0.53nm layer line repeat, and approx. Portion of niter (2mm wide) 3.9 ratio of non-twinned layer line spot spacing to subject to axaminsUon Amphibole layer line repeat distance (0.53nm). l/= EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersectiona = 1-3 fibers) Amosite 8= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) ZSmm filter Crocidolite Non-asbestos -------1 Slopping Rules; i--------- - Anthophyllite U= Matrix NSD= No Structure! Detected L:\BATA\PRIVATE\ IIIKEC\CADO'J'EM3 [ >50 «/G.O. or in 1st 4 C.O.

9/22/98 Tremolite Actinolite Non-Identified

NYC-WTC_000174912