TEM air analysis results, Oct 16 2001

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAS GROUP S7Q9 - 10/16/01 Lab Sample No. 61439 Filter Type MCE 25 mm Operator Client Spl. No. NSHS-EIR-10/16-6 Filter Area 385 rrm'2 Znscrumenc I.D. EM 10 CRX Grid I.D. 4^^ Dish Nc. Screen Magnificacion 16,40DX (GO) Area 0.01124 mm^2 Commencs ACC. Voltage '80 kv No. GO co be .Analyzed _4 ( 3.147 Struct. Corspd. to 70 s/mm^2.)

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

f( 1 A

Photo No. (from 1 in S aabeatoa- Identify all atructurea using EDS Check diffraction for aabeatoa Store ell unrepeated spectra eontaining aamplea) Grid acceptance: I atructurea up Ito 70a/l?im (l>t <•) <S0X undiasolved filter, overlapped or* foidea Struct. = > O.Sum de > 5:1 Aspect Ratio <10X particulate coverage >60X coverage Totals N- Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid aquarea Positive dlffracUon pattern properties conforming <SX holes or opaque areas F B C M >• Sum to laboratory identification criteria observed. InuMd portion Par ehrysoUle; 0.73nro spacing for (020) refloctlona. of niur Chrysotile 0.53nm ipacini for the layer line repeat, streaking ‘Araided portion of (110) and (130) refleotlona. or niur Por amphiboles: 0.53nm layer Une repeat, and approx. Portion of niter {2mm wide) 3.5 retie of non—tvinned layer Une spot spacing to ■ubjoet to ■xaminaUon Amphibole layer line repeat distance (D.53nm). v/= EDS spectrum conforming, to laboratory Identification criteria observed. AMPHIBOLES Ambiguous P= Single Piker (1-3 InteraecUona = 1-3 fiber*) Amosite Bs Bundle (>3 fiben <1 fiber diameter apart) C= Cluster {>□ intenecUons) f 25mm flltar Crocidolite Non-asbestos «= Matrix Stopping Rules: t--------- Anthophyllite NSD= No Structure* DetccUd >50 t/G.Q. or In 1st 4 C.a | Tremolite Actinolite Non-IdenUfied L\DATA\PRIVATg\MIKBC\CADDVKll3 8/22/83

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