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. 61849 Filter Type MCE 25 mm Client Spl. No. 04 Filter Area 395 mm*2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Macrnification 16,400X (GO) Area 0.01124 mm^2 Comments. Acc. Voltage 8 0 kV No. GO to be Analyzed _6 (4.721 Struct. Corspd. to 70 s/mm^2.)

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

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Photo No. (from 1 in S aahesLoa- Identify ail structures using KPS Check diffraction for asbestos I store all unrepeated spectra conLaining samples) Grid acceptance: I structures up to 70s/&n (l»t 4) <S0X undissolvea niter, overlapped or folded Struct = > O.Sum ft > 5:1 Aspect Ratio <10X particulate coverage >S0X coverage Totals Na Not Observed (BOS apectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea ^/= Poaitive diffraction pattern properties coafonnin< <SX holes opaque areal F B C M > Sum to laboratory Identification criteria observed. .auwMl portion For chrysotile; 0.7aam soaeinc for (020) rw/leeUens. a.sanm spaelnc for the layer line repeat, streaking of niter Chrysotile -Awlded portion of (110) and (130) rafleeUons. of niUr For amphiboles: O.S3nm layer Une repeat, and apprea. Portion of niUr (ZmiB wide) 3.9 ratio of non-twlnned layer Une spot spacing to Bubjoct to •xamination Amphibole layer Une repeat dislanca {0.83nm). v/s EDS Spectrum coDforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F> Single Fiber (1-3 intersections » 1-3 fibers) Amosite B= Bundis (>3 fibers <i fiber diameter apart) 28mm mtn* Crocidolite Non-asbestos £= ‘“tom.UOM) ______ i Sloppin, I------- Anthophyllite l«3B= No atrucluro. DotscUd | ‘*^ * ° °- Tremolite Actinolite Non-Identified l!\DATA\PWVATg\IIIKgC\CXDDVBI«a 8/22/80 !. J

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