NYC-WTC_000232450

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP »: 5515 - 09/17/01 Lab Sample No. 59046 Filter Type MCE 2S mm Operator A/’ Client Spl. Mo. OJO Filter Area 38S mm"2 Instrument I.D. EM 10 CRX Grid r.D. i-tQG ^'LVS Disk No. Screen Magnification 16,400X (GO) Area Q.0L124 mm"2 Comments. Acc. Voltage 80 kV No. GO to be Analysed Q ( Q.QOO Struct. CorsDd. cd 70 s/mm^2.)

structure SLruclurt Type Length I.D. of Structure EDS CO. (Nonasb. No. ^0.3 um No Coord. F B C M < 5 um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements) / J__ //

3 // S' 6 t( / Pi // Si 3 H

Photo No. (from 1 in 5 aabeatoa- Identify all structures uaing EDS Check diffraction for aabeatos Stare all unrepeated spectra — containing samples) Grid acceptance: {. structures up to 70a/mm (1 at 4) StrucL = > O.Sum & > 3:1 Aspect Ratio <50% undiaaolveu niter, overlapped or folded <10% particulate coverage >30% coverage Na Nel Oboerved (BDS apectrum or diffraction pattern) at teaat 20 unfolded or overlapped grid squares Totals PaalUvo diffraction pattam properties conforming <5% holes or opaque areas F B C M > Sum to laboratory identification criteria observed. Inuiod portion of filler For ehrraolile: a.73nni spacing for (020) feflecUons. O.aOnm spacing for Lh« layer line repeat, streaking of (UO) and (laO) raHecUona. 'Avoided portion Chrysotile 2 of niLer For amphiboles: O.bSnm layer Une repeat, and approx. Portion of filler (2niin wide) 3.3 ratio of non-lwinned layer Une spot ipeclng to lubject to examine Lion Amphibole layer Une repeal dlatance (0.33nm).

\/= SDS tpoclrum conforming to laboratory IdanUficadon srileria obaerved. AMPHIBOLES Ambiguous F= Single Flbar (1-3 InlenecUani = 1-3 fibera) Amosite 8= Bundle (>3 fl ben <1 fiber diamelsr apart) C= Cluater (>3 InLonocUans) 22mm .'liter II ■. - 1 Slopping Rules: I Crocidolite Non —asbestos Ua Uatrix Anthophyllite NSDs Ho SLructures Ootected L\DATA\PRIVATE\MIKZG\CAOO'^£U3 [ >30 v/q.O. or In tat * C.O.

O/22/Oa Tremolite Actinolite Non—Identified

CITY_21MC100_010237408

NYC-WTC_000232450