NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAa Lat Semple 0 Filler Type MCE mm Operar-cx C Client Spl. Nc. >Yer Area 2 95 mm' Inscrumenc EM Grid I-D Disk Wo. Screen Magnxr Is . 4C0X 130^ a^rea 24 mm^2 Cornmer.cs ftcc, Veitage eo kV No. GC to be A.".al' 4.721 Struci. Corsed 5. mn ■' 2

GO. Structure Structure Type Length I.D. of Structure EDSN or

>0.5 um (Nonasb. No Coord. No. F B C M » Sum IChrys.j Amphibole ) Nonasb. Ambig./ND Elements) < 5 um I

>• J'

I I ! Photo No. (from 1 in 5 asbeatoa- Identify all atructurea using EDS Check diffraction for asbeatoa Store all unrepeaLed spectra— containing aamples) Grid acceptance: I structures up to 70a/f?im (l«t 4) Struct. = > 0.5um ik > 5:1 Aspect Ratto <50% undisBolvea filler, overlapped or folded <IOX particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. -Unuaed portion of niter For chrysotile: 0.73nm ssacing for (02Q) roflectiona. O.Sanm (pacing for the layer Une repeat, ilrsaking of (110) and (130) refleeUona. For amphiboles: 0.33nm layer Une repeat, and approx.// / ‘Avoided portion af niter Chrysotile I Portion of filler 3.3 ratio of non-tvinned layer Une spot (pacing to U ■ ublBCL to I ! [2mm widel Amphibole layer Une repeat distance (O.SSnm). Ij examination /z? = EDS spectrum conforming to laboratory identification criteria obeerved. AMPHIBOLES Ambiguous Ps Single Fiber (1-3 interaecUcni = 1-3 fibers) ■AmoaiLe Bss Bundle f>3 fibers <1 fiber diameter apart) 25mm niter C= Cluster (>3 intersections) i Crocidolite ; Non—asbestos I M= Matrix ----------- ' S^PP«"< ----------- ■Anthophyllite I t NS0= No Structures Detected s/C-O. or in let 4 C.3. i^lnSuu Non-Identified [ L;\DaTA\PRIVATE\«IKKC\CADDVTEM3 9/22/98

CITY_21MC100_002849254

NYC-WTC_000209896