Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAS GP..CUP e - _ ,i: 20 ' C 1 Lao Sample Nc. 5253'- Filter Tree MC' 2 5 mm Ooeracer Client Sol Nc. 25 Filter Area 38: mm nm e2 Instrument I.D. EM 10 P. Grid 1,2 'f (~ Disk No. Screen Magnification 15,400:{ (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO co be Analyzed _ i 4.721 Str.Lc: _orsod. cc s'mm

GO. Structure Structure Type Length I.D. of Structure N or/ EDS >0.5 um (Nanasb. No Coord. No. F B C M s um >. 5um Chrys.) Amphibole Nonasb. Ambig./ND Elements

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Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra J containing samples) Grid acceptance: structures u to 708 >Trim (let 4) I Struct. _ > O.Sum k > 5:1 Aspect Ratio 50% endissolve i r. over appe or o e 1<, I0% particulate coverage >50% coverage Totals N- Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unused portion For ehryaatila: 0.73nm apacing for (020) reflections, of filter Chrysotile 0.57am spacing for the layer line repeat, streaking Avoided portion of (110) and (170) reflection.. of flits= For elec 0.53nm layer amphibole.: P yo line rePeat. and apers.. Portion of !liter (2mm side) 3.3 ratio of non-te need layer line spot spacing La aubl on m Amphibole layer line repast dlatanee (0.57nm). sum on a

EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous g

1 Fe Single Fiber (1-7 Intersections = 1-3 (there) B= Bundle (>3 fibers <1 fiber diameter apart) C= Cluste=r(3 Intersections) Ws Kat.r NSD= Na Structure. Detected 25mm filter Stopping Rule.: —~ >50 a/G.O. or in I.A. 4 G.O. Amosite Crocidolite Anthophyllite Tremolite Non —asbestos

Non —Identified Actinolite L\DATA\PRIVATE\YIXEG\CADD\'EU7 9/22/98

NYC-WTC 000104292