Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. TEM ANALYSIS I Lac .arncie Ci_Cnr. Spl ac Nc. 2E 3 F rac Tte F: :ar Area '^ E _; 1,[ rr - ! 1nsrrumen[ :.D. EM Gr:i .... " Dsc Nc Screen Magn:f:Cat:On 10, -1 1U (GC: Area -124 'nm ^: I Acc. Voltage 80 KV Nc. +GG to be Aca: _ei Ccmmen[5 mm~

GO. I Structure Structure Type Length j I.D. of Structure N EDS o r i/ ' I (Nonasb. No~ Coord.j No. F I B j C IM <c5 um 3 5um !Chrys.: Amphibole Nonasb. IAmbig./NDI Elements)

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I - Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grld acceptance: structures up to 70a slim (let 4) I<5)% unijiseolyed filter. overlapped or folded I 5trucL = > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage I Totals N= Not Observed (EDS spectrum or diffraction pattern) l t least 20 unfolded or overlapped grid squares _ <SX holes or opaque areas F B C M . Sum Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unwed poruon Far ohrywoUl.: 0.77nm apanna tar (020) reflection.. of 'liter Chrysotile 0.33nm spacing (Cr the Layer line repeat, streaking I of (110) and (130) refleeuans. Portion of filter Avoided peruse of filter For amphlbolee: 0.33am layer tine repeat. and appros. (2mm nde) 9.3 ratio of non-twinned layer line spot spacing m I Amphibole layer Use, repeat distance (0.33nm). esamect .

EDS spectrum conforming to laboratory % / Ambiguous j identification criteria observed. AMPHIBOLES I F= Single Fiber (1-3 Intersection. = 1-3 fibers) Amoette 8= Bundle (>3 fibers <1 fiber diameter apart) 23mm filter Craeidolite Non — asbestos I C= Cluster (>3 Intersections) ' Stepping Rules: Antho h Mite 450= Noi Structures Detected >iD 5/0.3. or in st 4 0.3. Tremo to Actinolite Non —Identified I L•\DATA\PRIVATE\MIXEG\CADO\TE53 9/22/98

NYC-WTC 000104391