NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS .3 GROUP 4

FiI: •pe MCD 2 5 mm C_ient Spi. No 15 FiCcer Arsa 3-9 □ nm" Inscrurnenc I.D. DM IC Grxd : G. Disk No Screen Magniiicacion 1.5 , 4OOX (GO; Aroi AJikiOi—ESlLi Corr.mer.C3 Acc. Voltage 90 kV Nc. GO be Analyzed Cor St'

Length I.D. of Structure EDS GO. structure structure Type ---------- !---------------------- 1---------------- 1---------------- (Nonasb. No. >0.3 um [ No Coord. F B C M < 5 um I Sum Chrys.i Amphibole | Nonasb. lAmbig./ND Elements) ^0 2 <7

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(J ____ i_____ I__ i i I Photo No. (from 1 in S aabeatoa- Identify all structures ustng EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: 1 structures up to 70a/i?im (l«t 4) <S0X undiasolvea filter, overlapped or folded Struct- = > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50/5 coverage Totals N- Not Observed (EDS spectrum or dlffracUon pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <SX holes or ooaque areas F B C M > Sum to laboratory identification criteria observed. ■Unused portion Por ebrysotlls: 0.73nm ssaetng for (020) rsnocUons. af niter 9.53nin spacing for ths layer line repeat, streaaing Chrysotile [ 'Avoided portion of (110) and (130) renecUons. of niter Par amphiboles: Q.S3nm layer Une repeat, and approx. (Zmm side) 3.5 ratio of non-twinned layer Une spot spacing to 1 sub)sct to examination ) I I Amphibole j layer Uns repeat distance (Q.SSnm).

CDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous F= Sinfie Fiber (1-3 intersections 1-3 liber.) ! Amosite | B= Bundle (>3 fibers <1 fiber diameter apart) 25mm fllLar Crocidolite j Non —asbestos C= Cluster (>3 intersections) U» Matrix J aujpplin Sulc: I------ Anthophyllite NSD= So Structures Detected I >50 >/G.a. or in 1st 4 G.O. L;\DATA\PRIVATE\Ml«C\CA0D'TEM3 9/22/9Q

CITY_21MC100_002849257

NYC-WTC_000209899