Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5769 - 10/26%7_

Lab Sample No. 62527 Filter Type MCE 25 mm Ccerator Client Spi. No. 21 Filter Area 385 mm"2

Instrument I.D. EM 10 CRX Grid I.D. ` 1',S 1C Disk No. Screen Magnification 16,400X (GOI Area 0.01124 mm "'3 Comments Acc. Voltage 80 kV No. GO to be Analysed 6 4.721 Struc-. _orsod. t s mm"_

GO. Structure Structure Type Length I.D. of Structure N or/ EDS (Elemen . No Coord. No. >0.5 um > 5um F B C M < 5 um Chrys. Amphibole p Nonasb. Ambi g./ND Elements

Li I I I r

I Photo Na. (from 1 in 5 asbestos- Identify all structures ustag EDS Check diffraction for asbestos Store all unrepeaLed spectra

I containing samples) Struct = > O.Sum & > 5:1 Aspect Ratio l TcceptanceT1 <50% undiseolve t er, structures up to 70a tnstm (lat 4) over apps <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas or o e Totals Positive diffraction pattern properties conforming r D t. lVi 7 Quill to laboratory identification criteria observed. Unused portion For cbrysatile: 0.73nm .posing for (020) reflections. of filter Chrysotile 0.53nm spacing for the leper line repeat, streaking Avoided portion of (110) and (130) reflections. of niter For am phtbolea: 0.53nm layer line repeat. and a 10 rex. Portion of filter (2mm wide) yQ line spot 3.5 ratio of pa Grinned layer " spacing Lo bect to su I ezamiaaUon Amphibole P layer line repeat distance (0.53nm).

✓= EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. AMPHIBOLES Fe Single Fiber (1-3 Intersections = 1-3 fibers) Amosite 8= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Croeidolite Non —asbestos Co Cluster (>3 intersections) $1oppi0g Ruler Antha h llite

I NSD=allof Structures Detected t:\DATA\PRIVATE\SlXEO\CADDVt13 ,'E 9/22/98 >50 s/0.O. or in tat 4 0.0. Tremol to Actinolite Non —Identified

NYC-WTC 000104288