Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5729 - 10/19/01 Lab Sample No. 61853 Filter Type MCE 25 mm Operator Client Spl. No. 08 Filter Area 385 mm~2 Instrument I.D. EM 10 CRX Grid I.D. iL£L_ Disk No. Screen Magnification IS,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 6 ( 4.721 Struct. Corspd. to 70 s/mm‘^2.)

r. n Structure smietur. Tn» Length I.D. of Structure EDS GO. (Nonasb. No, Coord. No. >0,5 uni F B C M < 5 um > Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) Z

3

<&' <3

n

Photo No. (from 1 in 5 as lestos- Identify all atructufee mini EDS Chee c diffraction for asbeatoa store all unrepeated spectra containing samples) lc?W-acMptancon^^^^^a^ucUirejiiDl 70s. s/^m (lat 4) <50% undinolved filler, overlapped or foldeito Struct. = > O.Sum & > 5:1 Aspect Ratio <iOX particulate coverage >50X coverue Ns Not Observed (EDS spectrum or dlffracUon pattern) |at least 20 unfolded or overlapp ed (rid «quare« Totals Z'= Fowitiv. diffracUon pattam pn.p.rU.. «>nr.m.in( !<»* .V*“-------- F B C M > Sum to laboratory identification criteria observed. •Unused portion For ehrysotilr. 0.73nm spaeinc for (080) reflections. or ntUr Chrysotile 0.03nm spacine for the layer uno repeat, streaking -Avoided portion of (110) and (130) renectiona. or niter For ampliibolss: O.SSnm layer line repeat, and approx. Partion of fUtar {2mm wide) 3.S ratio of non-twinned layer line spot spacing to 1 subj^Jo Amphibole layer line repeat dtaUnca (O.Mnm). "s EDS Spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES w F= Single Fiber (1-3 InteraecUon. = 1-3 fiber.) Amosite B= Bundi. (>3 fiber. <1 flh.r diameter apart) ZSmin nuar Crocidolite Non—asbestos M= aX?/ -------- Istopplna Ruin: I--------- Anthophyllite NSD= No Structure. D.lecUd | >80 l/C.O. or In lit 4 C.O. [ Tremolite Actinolite Non-Identified U\DATA\PW¥*TE\MlKEG\CADDVEa3 g/2Z/M

NYC-WTC_000174898