Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS 57"; LAE GROUP 4 - 10i25i)~ I Lan Sample Nc 6252E F_ltar Type MCE 25 mm Operator L , { i- -

Cli.erc 301. No 20 Filter Area 38855 mm'2

Instrument I.D EM _n CEX Grid I.G. Disk Mc

I Screen Magnification 15,400X 'GO) Area 0.01124 mm'2 Comments

Arc. voltage 80 ky No. GO to be Analyzed t 4.72_ S orsod. to 70 3 mm'

Length I.D. of Structure EDS GO. Structure Structure Type g N or,/ (Nonasb. I No Coord. No. F B C M > 5um Chrys. Amphibole Nonasb. Ambig./ND Elements) <05 m

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I _ Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos e all unrepeated spectra containing samples) Grid acceptance: atructures u to 70a riim (let 4) I Struct = > 0.5um & > 5:1 Aspect Ratio <50% undiaaolve (liter, overlapped or (aided <10% particulate coverage >50% coverage Totals Na Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares Jo Positive diffraction pattern properties conforming <5% holes or opaque areas U n -oum to laboratory identification criteria observed. Unused portion Por ehryseUta: O.TJnm spacing for (0201 reflections. of fllier Chrysotile 0.39om epaesng for Use layer Line repeat. ■traaaing I of (110) and (130) reflections. Avoided portion of filter for amphiboles: 0.83nm layer line repeat, and approx. Peruon of filter (2mm wtda) 1.3 ratio of non-twinned layer line ■pot spacing to subject a Amphibole layer line repeat distance (0.3Snm). esamin.Uon

EDS spectrum conforming to laboratory Ambiguous I identification criteria observed. F= Single Fiber (1-3 intersections = I-3 fibers) AMPHIBOLES Arrlosite B= Bundle (>3 fibers <1 fiber diameter apart) 2 mm filter Crocidolite j Non —asbestos C= Cluster (>3 interaeetions) ___._A Stepping Rwe■: !f= Matrix I Anthophyllite NSD= No Structure. Detected >50 s/C.O, or in lot 411 j Tremolite Non —Identified I L.\DATA\PRIVATE\WlICEC\CADO\TEICS 9/22/98 Actinolite

NYC-WTC 000104287