NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GRCUF # Lac Sample No. 5254- ;i- T/'pe MCE 25 mm

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GO. structure Structure Type Length I.D. af Structure j EDS ^0.5 um -■ (Nonasb. No. Coord. No. F B C M » Sum Ichrys.! Amphibole I Nonasb. Ambig./Npi Elements) < 5 um I ! J

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Photo No. (from I in 5 asbestos- Identify ail atructurea using £DS Check diffraction for asbestos 2______ ______ J) Store all unrepeated spectra—^ containing samples) structures up to 70a/i?im Grid acceptance:! (nt 4) <50% undissoiveo filter, overlapped or folded Struct = > O.Sum Jt > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Not Observed (EDS spectrurn or diffraction pattern) at least 20 unfolded or overlapped grid squares Totals Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M > Sum to laboratory IdenUflcatian criteria observed. 'Unused porUon of niter For ehryaolila: Q.TSnm «iipacing for (020) rensetions. 3.53nin spacing far the layer Une repeat, streaking Chrysotile } 'Avoided porUon of (110) and (K□01 reflee Lions. or niter For amphiboles: a.S3nfn layer Une repeat, and approx. Portion of niter' V (2mm wide) 3.5 ratio of nen-tvinned layer Une spot tpactng to subject to axamination y , I Amphibole layer line repeat dletanca l0.53nm).

EDS spectrum conforming to laboratory \\\ / identification criteria observed. ^1 AMPHIBOLSS Ambiguous i F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite j j a= Bundle (>3 fibers <1 fiber diameter apart) Cs Cluster (>3 Intersections) ______________ SSnim fiitar , Crocidolite j Non—asbestos! 11= M.Lri, I----------- 3Uippm« Huie.: ।----------- - Anthophyllite j ) NSD= No Slruoturo. Delected i ■/=•»• ’r 1 Soliu ! Non-Identified 1 L:\0ATA\PRIVATE\MlKEC\CA00VEM3 8/22/M

CITY_21MC100_002849281

NYC-WTC_000209923