Asbestos TEM micrograph data sheet, Oct 27 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAE GROUP S: ST64 0/27/01

Lab Gancie Mo. 61353 Filcer Type MCE mm Operator Client Spi. No. 6 Filler Area 38S mm"2

lnst;runent I.D. EM 10 CRX Grid I.D. - Zu-.. Drs.< No.

Screen Magnif icacror. ■ 5 , 4 0Oi: (GO) Area 0,01124 mm' Comments Acc . Volz.agfe 8 0 kv No. GO to be Analyzea _4 Struct. Corsnc. to 70 s/tmr*2 )

I.D. of Structure EDS (;o. structure Structure Type Length (Nonasb. No Coord. No. >0.5 um F B C M < 5 um > Sum Chrys. Amphibole Nonasb, Ambig./ND Elements) t J- NvW z R It 1/___ It

i Pho.o No. (from 1 in S asbestos- Identify all atructurea uaing EDS I § Check diffraction for asbestos Store all unrepeated spectra -J containing samples) Grid acceptance.'! structures up to 70a/^m (1st 4) <50X undiaaolved filter, overlapped or folded Struct, s > Q.5um & > fill Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum ar diffraction pattern) at least 20 unfolded or overlapped grid squares Positive dlffraetlan pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. *UnuB«d portion Per chrysotile: Q.73nm spseini for (D20) rsnecLlons, 0.53nm spacing for the layer line repeal, streaking of filter Chrysotile “I I -Avoided portion of (110) and (130) reflecuons. of filler For amphiboles: 0.a3nni layer line repeal, and approx. Portion of filter (2mm wide) 3.S ratio of non-lvinned layer line spot apaeing to aubjecl to Amphibole layer line repeal distance (O.SOnm). exsmination

yAs EDS epeelrum conforming to laboratory identification criteria observed. AMPHIBOLES^ Ambiguous F= Single Fiber {1-3 interaectione = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non-asbestos C= Cluster (>3 inlenections) -------- 1'* Stoppini Rules: I Ms Matrix Anthophyllite NSD= No Strueturea DetacUd >50 a/C.O. or in let 4 Tremolite Actinolite Non-Identified L:\I‘ATA\PRIVATK\M1KSC\CADO'JTM3 9/22/98

CONFIDENTIAL, CITY_21MC1OO_OO3473446 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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