Asbestos TEM analysis results, Sept 2001

NYC 9/11 Public Portal Document

ATC .ASSOCIATES INC. TEM ANALYSIS L.A5 GROUP #: 5543 - 09/21/01 Lab Sample No. 59290 Filter Type MCE 25 mm Opsracor Client Spl. No. NSHS-llMS-9/21>04 Filter Area 385 mm"2 Instrutnent I.D. 5M 10 CRf-C Grid I.D. Disk No. Screen Magnification 16 , 4 00?: (GO) Area 0.01124 mm"2 Comments ?icc. Voltage 30 kV No. GO to be Analysed 3.147 Struct. Corsod. to ~0 s/mm‘2.)

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

Photo No. (from 1 in S ubcatoa- Identify all structures using. EDS Chee c diffraction for asbestoa Store all unrepeated spectra containing aampiea) Grid acceptance:! structures up to 70a/Am (Ut 4) <50X undisaolvca filter, overlapped or folded Struct = > Q.5um 4 > 5:1 Aspect Ratio <10X particulate coverage >50X coverage Totajs- Nk Not Obaerved (BOS apeetrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properttea canformlng <SX holea or opaoue areas F B C M > Sum to laboratory identification criteria ebaerved.- •Uouaed perLian Por chryaotlle: Q.73nm aoaclnc for (OSO) reflecUona, of niur Chrysotile Q.23nm ipacinc for Iha layer Une repeat, atreaklog ‘Avoided portion of (110) and (ISO) reflecUona. of filter Per ampbibolea: Q.ASnm layer line repeat, and approx. Portion of niter (Smm wide) 3.2 ratio of non-lwinned layer line ipot apacinf to ■ubject to axamination Amphibole layer Une repeat diatance (O.SSnm).

EDS spectrum eonfarming to laboratory identification criteria obaerved. AMPHIBOLES Ambiguous Single Fiber-*'(1-3 Intenectiona = 1-3 fibers) Amosile Bs Bundle (>3 fibers <1 fiber diameter apart) 22mm fULor Crocidolite Non-asbestos Si**’ —। suppm, su,„: ।— Anthophyllite NSD= No Slructura 3« toe tod [ >5° ■/C-O- °r in Lt < C.3. | Tremolite Actinolite Non-Identified L!\ DATAXPRIVAm, MIKSG\CAnn\rEM3 3/22/06

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