Asbestos TEM analysis results, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP #: 5741 - 10/23/01 Lab Sample No. 61968 Pilcsr Type MCE 25 mm Operator V-J Client Spl. No, 09-15 Filter Area 385 iron*2 . .1^ Instrument I.D. EM 10 CRX Grid I .D. M '3 — Disk No. Screen Magnification 16,40C)X (GO) Area 0.01124 mm~2 Comments Acc. Voltage 80 kV No. GO to be Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/nim^2.!

rn Length I.D. of Structure EDS GO. structure Structure Type (Nonasb.

asz No, Coord. No. ^0.5 um F B C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements)

5T 2. 77 1 //

C_J

Photo No. (from I in 5 asbestos- Identify all atructurea using EDS _J_________ L__ Check diffraction for eabeataa Store all unrepeated spectra—^

containing samples) Grid acceptance:! jtructures up to 70g/&n (l«l 4) <50% undissolved fjlter7”verlapped or foUeo Struct. = > O.Sum ft > 5:1 Aspect Ratio <10% particulate coverage >S0X coverage Totals Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Poaitlve diffraction pattern properties conforming <5X holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion Per chrysotile: 0.73nm spacing for (020) reflections, 0.53nm spacing for the layer line repeal, slreaking of filler Chrysotile -Avoided portion of (110) and (130) reflections. of filUr Por amphiboles: 0.93nm layer line repeat, and approx. (2mfn wide) 3.3 ratio of non-twinned layer line spot spacing to Amphibole layer line repeal disLanee (0.83nm). \/= EOS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 Intersections « 1-3 fibers) Amosite B= Bundle (>3 fibers <l fiber diameter apart) ____________ 2Smm filter Crocidolite Non-asbestos Si I--------- Slopping Ruler I----------- Anthophyllite NSD= No Slructur,, Dotoclod | >W »/C °. in l.t 4 C.O. | Tremolite Actinolite Non-Identified L;\DATA\PRl¥ATE\mKEC\CADD'.J'EM3 9/22/Sa

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