Asbestos TEM micrograph data sheet, Lab Group 57B5, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP M: 5765 - 10/28/Dl Lab Sample No. 62419 Filter Type MCE 2S mm Operator Client Spl. No. 10 Filter Area 385 mm"2 Instrument I.D. EM 10 CRX Grid I.D. Disk No. Screen Magnification 15,400X .(GO) Area 0,01124 mm-2 Comments Acc. Voltage 8 0 kV No. GO co be Analyzed ( 3.147 Sc.ruct. Corspd. to 70 s/mm'^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)

-3

Photo No. (from 1 in 5 asbeatoa- Identify all structures using EDS Check diffraction for asbestos tore all unrepealed spectra containing samples) Grid acceptance:! structures up to TOs/i^m (l8t 4) <S0% undissolvea filter, overlapped or folded Struct. = > O.Sum & > 5:1 llapect Ratio <10X particulate coverage >50% coverage Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals y/= Positive diffraction pattern properties conforming <SX holes or opaque areas F B C M > Sum to laboratory identification criteria observed. 'Unused portion For chrysolite: 0.73nm ■pacina for (020) ronections. of niter Chrysotile Q.SSnm spacing for the layer line repeat, streaking 'Avoided portion of (110) and'(130) refleetiona. of filter For amphiboles: 0.53nm layer line repeat, and approx. Portion of filler (2mm wide) 3.S ratio of non-twinned layer line spot spacing to subject to examination Amphibole layer line repeat distance (O.SSnm). \Z= EDS spectrum conforming to laboratory identiricaUon criteria observed. AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersectloni s 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) ZSmm filter Crocidolite Non-asbestos ------- 1” stopping Rule*: t Anthophyllite Us Matrix NSD= No Structure. DetecUd ■[ >30 »/C.O. or in lat 4 Tremolite Non-Identified L:\DATA\PHIVATE\MIKEC\ CAD DtTEMa fl/22/90 Actinolite

CITY_21MC100_003099958

NYC-WTC_000182608