Asbestos TEM micrograph data sheet, Lab Group 5793, Oct 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP 5793 - 10/20/01 Lab Sample Nc . o2'72& Filter Type MCE rr.in Operacor Client SdI. No. 8 Filter Area 385 mm* 2 Instrument I.D. EM 10 CRX Grid I.D- Disk No. Screen'. Magnification I6,400X • (GO) Area 0.01124 mm*2 Comments Acc. Voltage 80 kV No. GO to be Analyzed ( 3.147 Struct. Corspc. to 70 5/mm*2.)

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

z

A

Store all unrepeaLed spectra--^ Photo No. (from 1 in 5 aa lestoa- Identify all atructurea using EDS Chee : diffraction for aabeatoB containing aamplea) Grid acceptance;! atructurea up to 70b/i'Am (let 4) <50% undiaaolvea filter, overlapped or Voided Struct. = > 0.5um it > 5:1 Aspect Ratio <IOX particulate coverage >50% coverage Totals Ns Net Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <SX holea or opaque areas F B C M > 5um Positive diffraction pattern properties conforming to laboratory Identification criteria observed. -Unuaed portion For chrysotile; Q.73nm spacing for (020) renections, O.S3nn> spacing for the layer line repeat, streaking or niter Chrysotile of (110) and (100) reflections. 'Avoided portion of filter For amphiboles; 0.53nm layer line repeat, and approx. Portion of niter i2mm *lde| 3.fl ratio of non-tvlnned layer line spot spacing to aubject to BxamfnaUon Amphibole layer line repeat distance (Q.S3nin). v^'EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous _P= single Fiber (1-3 InlerBecUona = 1-3 flbera) Amoaile Be Bundle f>S fiber* <1 fiber diameter apart) C= Cluster (>3 Intersections) ZSmm nitar Crocidolite Non-asbestos --------'* Slopping Rules: I--------- - Anthophyllite Mb Matrix NS0= No Structure* Detected >50 i/G.O. or in 1st 4 C.O. Tremolite Non-Identified L:\n*TA\PRIVATE\MlKEC\CADD'^M3 B/22/98 Actinolite

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