TEM air analysis results, Oct 21 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB3ROUP1. 'll/o:

.t £ NC' ■.ie?4 Filtei T>T..e K7E rtm Ope C'/-' Nc. Fl) Ate a J 1:5 inn'

xuruenc I 11 EMIOJRX Grid I .[) rusk. Me. en Maciii: . cat ion ir^^OCX (GO) Aiea 0 01} ?4 Him' Conunents

•cc, VoRaot 80 TV Nu LO Analyzed 4 ' 14? S^ruc: Coispd. to 7C s/nitn"? )

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

Photo No. (from I in 5 asbestos- Identify all structures using EDS> Check diffraction for asbesLoa Store all unrepeated spectra containin| samples) Grid acceptance:! structures up to 70s/^m (Ist 4) <50X undisaolved filter, overlapped or folded Struct. - > O.&um 4c > 6:1 Aspect Ratio <10X pirliculile coverage >50% coverage at leaat 20 unfolded or overlapped grid aquarea Totals N= Not Observed (CDS spectrum or dlffracUon pattern) Positive diffraction pattern properties conforming <5X holes or opaque areas F B C M > 5um to laboratory idenUflcatlon criteria obaerved. ■Unused portion For chryaotlle: Q.73nm spacine for (020) renectiona. O.S3nm spacing for tbs layer line repeat, streaking of niter Chrysotile ------ Avoided portion of (110) snd (130) reflections or niter For amphibole*: O.&Snm layer line repeat, and approi. Portion of niter (2mm Wide) 3.5 ratio of nen-twinned layer line spot spacing Lo subject to ■ xsmknatlon Amphibole layer line repeat distance (O.SSnm).

EOS spectrum conforming to laboratory Identification criteria observed. AMPHIBOLES Ambiguous F* Single Fiber (1-3 Intersections a 1-3 fibers) Amosite Ba Bundle (>3 fibers <1 fiber diameter apart) 25mm niter Crocidolite Non-asbestos S: •"t.rMCU.M) _____ Isiopptn, L_ Anthophyllite NSD» No Struclure. DelocUd ® Tremolite Actinolite Non-Identified L;\OATA\PRIVATE\MJKEC\CADD7EM3 6/22/88

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