NYC-WTC_000230537

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LA.B GROUP #■ 5532 - 10/32/QI Lab Sample No. 53305 Filter Type i^CE 25 ntn C'peracor LA Client 5pi. No. ?3234M-S3-10/2--1 Filter .Area 36 5 mm^2 Instrumenc I.D. EM 10 CRX Grid I.D. iLlAi. Disk No. Screen Magnitication la,4G0X (GO) Area 0.01124 mm' Conwr.ents Acc. Voliage 30 .<7 Nc. GO to be Analyzed 70

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

F j/

Photo No. (from 1 in 5 aabeatos- Identify ail atructurea using ZDS Check diffraction for asbestos Lore all unrepeated spectra — containing aamplea) Grid acceotanced structures up to TOs/An (Irt ■*) Struct = > Q.3uni & > 5:i Aspect Ratio <S0X undiaaolvea filter, cverlappea or Sldea <10X particulate coverage >50X coverage Ns Not Observed (EOS apecirum or diffraction pattern) at leaat 20 unfolded or overlapped grid squares Totals Poaitiwe diffraction pattern properties eonforming <SX holee or opaque areae_______________________ F B C M > Sum to tabaratsry Identification criteria observed. -Unuaed pertian For shryaeUle: 0.73nm apaelnx for (020) ronocUons. of niter Q.^anm apaeing for the layer Tina rapeat, alraaklna Chrysotile of (HO) and (130) reneetiens. ‘Avoided portion of filler For O.Mnm layer line repeat, and approx. Portion «r niter (Emm Wide) 3.5 ratio af non-twinnad layer line epol apacln< la autoject la Amphibole layer Une repeat diatance (fl-53nm).

EOS apecirum conrormini to laboratory identification criteria cbaerved. AMPH1B0L2S Ambiguous F= 3in|lo Fiber (1-3 intenectlona = 1-3 fibera) Amosite 8= Bundle f>3 fibera <1 fiber diameter apart) Zfimm filler Crocidolite Non-aabeatoa C= CluBler {>3 interaectionai -------- 1 Stopping Bules: I---------- - 11= Matrix Anthophyllite >50 a/C.O. ar In lai 4 0.9. I NSDs No Slructursa Detected Tremolite Actinolite Non-Identified j L:\DATA\PRIVATE\ i«KBC\CAD0'TEM3 g/2S/oa

CONFIDENTIAL, CITY_21MC100_011771770

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230537