Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS Lab Sample Nc. 02550 Filter ' MCE Cperatzr

Ciienc Sp1. No. 44 F:1ter Araa ]85 mm'2

Instrument I.L. EM 1) CRX Grad I.C. ~.-r 2 Cisk. No.

Screen Magnificat:.on L4,4C, OX (GCi Area 1 4 mm" Comments

Act Voltage 80 ':IV No. GO rc re A:ialvred d 4 Sr_r,cc - sod. -c mm' -

El GO. No Caord. Structure Structure Type No. F B C M >0.5 um < 5 Length 5um Chrys. I.D. of Structure Amphibole EDS N or/ (Nonasb. Nonasb. Ambig./ND Elements) ~• P

=1

fl I

I

Photo No. (from I in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Stare all unrepeated spectra containing samples) Grid acceptance: structures u to 70s ittm (let 4) <50% undissolve i r, over app or o e Struet = O.Sum k > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Punitive diffraction pattern propertiex conforming <5% holes or opaque areas F I U M to laboratory Identification criteria Unuaad portion For chryoouln 0.75nm ipaetng for (OEO) reflection.. of niter Chrysotile .55nm spacing for the layer una repeat. streaking I a f (110) and (130) reflection.. avoided portion of filter For amphibole.: 0A5nm layer line repeat. and approx. (2mm side) 3.3 ratio of eon- ts tnned layer line .pot .pacing to Amphibole layer line repeat distance (D.33nmj. EDS apeetrum conforming to laboratory Ambiguous Identification criteria observed. PHIBOLES observed.e~~Amosite F= Single Fiber (1-3 Inter.ectiona = 1-3 fibers) R= Bundle (>3 fibers <1 fiber diameter apart) C. Cluster (>3 intersection.) 20mm filter Crocidolite Non —asbestos or since: Anuiophyuite M= Matrix NSD= N. Structure. Detected >50 ■/G.O. /C.o. or In Ist 4 0.0. Tremolite Non —identified I Actinolite U\DATA\PRYAm\MISEC\CAODV'EM5 4/22/9.

NYC-WTC 000104309