NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS L.--P GRCVF a Lab Sample r Type MC: (PT. Operator (iienc Spi . Nc - “ Q Filler Area 3 3: Tim Insor'itneno SM 10 CRX Grid I No Screen wagnid 16 .400'; (GO' Area mm ^cmmer.os Acs Voltage 30 Nc. GO oc be Ana orsDC

_ GO. J Structure Structure Type i Length I.D. of Structure N or EDS T (Nonasb. No.) Coord. No. >0.5 um M F B Sc < 5 um > 5um iChrys.i Amphibole Nonasb. Ambig./NPl Elements) —1----- 73

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I 3 Photo No. (from 1 in 5 asbestos- i I I Identify all structures using EDS Check diffraction for asbestos 1 I Store all unrepeated spectra containing samples) Grid acceptance:! structures up to TQs/i^im (1st 4! Struct = > O.Sum A: > 5;I Aspect Ratio <50% undlsaotvea filter, overlapped or folded <10X particulate coverage >5OX coverage Ns Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <SX holes or opaque areas F B C .M > Sum to laboratory identification criteria observed. ■UnuMfl portion Por chrysotile: Q.73nm spaeinc for (020) rsnscUons. of niter Chrysotile 0.53nm spacing for the layer line repeat, streaking ■Avoided portion of (110) and (lao) reflecUons. of niter Par amphiboles: Q.S3nm layer line repeat, and apprex. Portion oZ filler (2mm wide) 3.5 ratio of non-lwinned layer line spot spacing to subject to umination Amphibole layer Une repeal distance (0.53nm).

\/= SDS spectrum conforming to laboratory Identification criteria observed. .A.WPH1B0LES i Ambiguous Fs Single Fiber (1-3 interaectlona = 1-3 fibers) , AmoaiLe 9s Bundle (>3 fibers <1 fiber diameter apart) C= Cluster <>C intersections) 25mm nitar Crocidolite Non-asbestosi k= Matrix . Stopping Rules: —- Anthophyllite NSQ= Ho Structuree Detected >50 i/C.O. or in 1st A G.O. Tremolite Actinolite Mon-Identified L\0ATA\PWVATE\MIKBG\CAD0'a'EU3 S/22/08

CITY_21MC100_002849271

NYC-WTC_000209913