Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP # 5771 - 10;250 Lab Sample No. 62591 ?filter T'rpe MCE 25 mm Cper3t CO

Client Spl. No. 27 ei=tar Area 385 mm"2 Instrument I.D. EM 10 CR:C Grid I D. —~ ) Disk No

Screen Magnification 16,400X (G0; Area 0 01124 mm-2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 1.721 Struct Corsod. 70 s'mm2.

EDS GO. Structure Structure Type Length I.D. of Structure N ors/ (Nonasb. No Coord. No. ,0. 055 um F B C M um >. 5um Chrys.1 Amphibole Nonasb. mbig./ND Elements)

2 j 7 .-

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I __ 4 _______ Fl L __ ___rlll ___ ___ __ ____ ___ ___ ___

Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures u to 70a t; (1st 4) <SOS undiasolve filler. overlappe or o e Struct. = 0.5um & > 5:1 Aspect Ratio <30% particulate coverage >50S coverage Totals N- Not Observed (EDS spectrum or diffracUon pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M - 5um V' positive diffraction pattern properties conforming Unwed portlon to laboratory Idenuflcatlon criteria observed. For ehryaotlla: 0.77nm spacing for (020) resections, of filter Chryso tile 0.370m spacing for the layer line repeat. •lreaking Avoided portion of (110) and (130) reflection.. of filter For amphiboles: 0.53nm layer line repeat. and appmx. taruon of fllter (2mm vide) 3.3 ratio of non-teinned layer line spot spacing to ■u0leet 1e Amphibole .a.-,..Liao layer line repeat distance (0.33nm).

EDS spectrum conforming to laboratory Identification criteria observed. \\, AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = (-3 fibers) Amosite a= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite I Non —asbestos C= Cluster (>3 intersections) . Stopping Rule.: , Anthophyllite i

1 M= Matrix >20 t/G.D. Sr in let 4 G.G. Tremolite No Structures Detected Actinolite Non —Identified l l j t.\DATA\PRlvATE\MlKEG\CADO\TEM3 9/22/08

NYC-WTC 000104405