Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document a ¢ ¥ i 4 it 1 ‘3 ¢ 4 A 4 wert ATC ASSOCIATES INC. -— TEM ANALYSIS LAP 3ROUP #: 5761_- 10/25/02} Rf? Operator Fulter Type MCE_25 mm Filter Area 385 mm” 2 —_— Grid I.D. (GO) Area 0.01124 mm*2 Comment s ( 4.722 Struct. corspd. to 79 s/mm*2 Lab Sample No. 62188 Client Spl. No. 15 Instrument 1.D. EM 10 CRX Disk No. Screen Magnification 16,400X% Acc. Voltage go_kV No. GO to be Analyzed _& tructure Type Length | LD. of Structure’ N or / (Nenasb. : Structure Coord. No. [rl Bic M 208 on > sum (Chrys.| Amphibole Nonasb. |Ambig./ND Elements wine | y tL | im \o) Zz [o] “ Cyne a Ar<iw in] N coy) NIN oye ser — AWN =) Store all unrepeated spectra Check diffraction for asbestos up to 70a/thm (Lat 4) Grid <$0% undissolved cr, overlapped or folded T { ] PP <10% particulate coverage >SO0% coverage at least 20 unfolded or ‘overiapped grid aquares re F BC M 2 5um <5% _holes_or opague oats No. (from 1 in 5 asbestos— containing samples) Struct. = > 0.5um & > S:i Aspect Ratio N= Not Observed (EDS spectrum or diffraction pattern) Vv Positive diffraction pattern properties conforming to laboratory identification criteria . Por chrysotile: O.73om cing for (020) reflections, for the layer repeat, streaking 9.93nm spacing of (110) and (120) reflections. of flter Chrysotile of filter vor hiboles: 9.83nm I: line repeat, and approx. Portion of filter 2mm wid : For arichor san-twinned ingot line repent wing 2 mubject to (2mm wide) Amphibole layer line repest distance (0.S3am). examination Av ‘= £DS spectrum eonforming to laboratory * identification criteria observed. AMPHIBOLES Ambiguous Fa Single Fiber (1-3 intersections = 1-3 fibers) Amosite 2mm fitter Crocidolite Non~—asbestos B= Bundle (>3 fibers <i fiber diameter apart) 7 aching . ____- Stopping Rules: — Anthophyllite ” Vite NYC-WTC_000104199 cae Hed atin utdantifie