Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #; 5623 - 10/06/01 Lab Sample No. 60351 Filter Type MCE 25 mm Operator Client Spl. No. N5HS-EBR-10/6-07 Filter Area 385 mm^2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 16,40QX (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 4 ( 3.147 Struct. Corspd. to 70 5/niTn^2.)

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

Photo No. (from 1 in 5 asbestos- Identify all e^ucturea using EDS Check dinracLion tor asbesLoa Store all unrepealed apectra— containing aamplea) Grid acceptance: I structurca up to 70a/^m (l«l 4) <50X undiaaolvea filler, overlapped or folded Struct, s > D.Sum > 5:1 Aspect Ratio <10X particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming CSX holes or opaque areaa F B C M > Sum to laboratory identification criteria observed. •Unused porUeo Per ehrysoUls: 0.73nm spacing for (020) r«nselions. of niur Chrysotile O.aanm spacing for the layer line repeal, slreaking 'Avoided portion of (110) and (lao) reflecuona. of filler Por amphiboles: Q.93iun layer line repeat, and approx. PorUon of filter (2mm wide) 3.& rsUs of non-twlnned layer line spot spacing to aubjecl to examineUon Amphibole layer Uns repeat dlslancs (0.93nm). v/= EDS speelrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous P= Single Fiber (1-3 intersections = 1-3 fibers) Amosite Bs Bundle (>3 fibers <l fiber diameter apart) 2Smm filter Crocidolite Non-asbestos M= ______ I suppint Rul»: I------- Anthophyllite NSDn No Slructurei DoUcUd | ‘° ° Tremolite Non-Identified Actinolite U\DATA\PRIVATE\MIKBC\CAB0'T2>a 9/22/fiB

CITY_21MC100_003099242

NYC-WTC_000182536