Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No

Client Spl. No. 12 62.5(' LAS GROUP d: 5?71 - 10j26'0_

FLLoar Type MC=

FL_Czr Area 385 mm' mm

I InsCrumenn 0.0. EM 10 CRX Disk Nc. Screen Magnification 16.-koOX (GO Area 0.0112.1 mm =omment3 Aco. Voltage 30 kV No. GO Co be Anal;•aed 6 4. _1 Scruct. 7o rscc. -o s mra 2

L 1 GO, Structure Structure Type Length I.D. of Structure N orv' j (Nonasb. EDS No Coord. No. ,0.5 um FIB C M < 5 um >. 5urn IChrys.1 Amphibole Nonasb. IAmbig./ND Elements

14:- _ r7 — 'c--—-- - ___ ___ __ ________ ___ ___

L J i!7 —< -

I I El I I I I I Photo No. (from 1 in 5 asbestos— I I Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Struct. = > 0.5um k > 5:1 Aspect Ratio J Grid acceptance: <50% undiaaoive structures u to 70a I1m (let 4) i or, over apps or o e <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or opaque areas Totals

to laboratory identification criteria observed. unused portion of [titer For ohryaeUlr. 0.71nm spacing ror (020) reflections. 0.33om spacing for the layer lino repeat. streaking Chrysotile of (110) and (130) reflections. Avoided portion of [ills, For amphlbelea: 0.37nm layer line repeat, and appres. Portion of filter (2mm •ids) 7.3 ratio of non—twinned layer line spot spacing to sub)eet to examination Amphibole layer line repeat distance (0.53nm).

LI EDS spectrumon conforming to laboratory identification criteria observed. F= Single Fiber (1-3 Intersections a 1-3 fibers) 8= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 Intersections) 25mm tiller /i 1 AMPHIBOLES Amosite Ambiguous

Crocidolite i Non —asbestos M= Matrix Slapping Rule: I Anthophyllite

I NSD= No Structures Detected L\DATA\PR)VATE\MIKEG\CADD\TEM3 >40 ■/O.O. or in tat 46.0. j

9/22/98 ' Tremolite Actinolite Non —Identified

NYC-WTC 000104381