Asbestos TEM micrograph data sheet, Oct 27 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP f: : ~ 10/27'01 Lab Sample No. Filter Type MCE 2S rnm Operator Client Spl. No. 9 Frlter Area 36E mm2 instrument I.D. EM LQ LRX Screen Magnification l-^400X Grid I.D. (GO) Area —w/— 0.01124 mm^2 Disk No Commencs Acc. Voltage 8 0 kV No. GO co be Analyzed _4 147 Struct. Corscc 7C' s/mrT?2.!

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

31 f 22? WL (I if T GT# ff -6^

__ [_ ! I 1

Stare all unrepeated spectra—^ Pho.o No. (from 1 in 5 asbealos- Identify all atructurea using EDS Check diffraction for aabesLos conLaining Bamplen) Grid acceptance:! atructures up to TOa/Am (Ut 4) <50% undiaaolvecf filter, overlapped—or folded Struct = > 0.5um & > 5:1 Aspect Ratio <IOX particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M > Sum Positive diffraction pattern properties confarmlnc to laboratory identification criteria observed. For chrysotile: O.TSnm apsclni for (020) refleetlont, O.S3om spacing for the layer line repeat, streakinc of (IIO) and (130) renseUona. Unused portion or filter Avoided portion of filler Chrysotile rT\ I Por amphiboles: O.S3nm layer line repeat, and approx. (2mm wide) 3.5 ratio of non-tvinned layer line spot spacing to Amphibole layer line repeat distance (U SOnm). \/s EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 Intersections a 1-3 fibers) Amosite 0= Bundle flben <1 fiber diameter apart) S5mm fdUr Crocidolite Non-asbestos C= Cluster (>3 intcrseetlonn) —■ J stopping Rules; 1——। Anthophyllite Us Matrix NSOs No Structures Detected >50 s/G.O. or In 1st 4 C.O. Tremolite Actinolite Non-Identified U\liATA\PRlVATB\MlKBC\CAD0'^EM3 8/Z2/90

CONFIDENTIAL, CITY_21MC100_003473447 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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