Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS 1 :.ao Sample Nc. 52554 LAB ?ROr -P 5 - Filter Type MCE 25 mm - Operacor L( (

Client Spl. Nc 48 Filter Area 385 mrn 22 i4 I Instrument I.D. EM 10 'CR.i Screen Magnification. 15,400 Grid I.D. (GO; Area 1 i~ 0.01124 mm'2 =_sk NO.

Comments Acc. Voltage 80 kV Nc. 30 Or be Ana:, ced _ 72_ Scr•,c: _ tr_' . _ s •rrr'

I GO. No Coord. StructureStructure Type No. F B C M Length >. 5um jChrys.l LD. of Structure Amphibole EDS Nor,/ (Nonasb. Nonasb. Ambig./NDI Elements) 1

<°5 m

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L Photo No. ((ram I in S asbestos— Identify all structure° using EDS Check diffraction for asbestos Store all unrepeated spectra _ I containing samples) IGrid acceptance: <50% undieeolved filter, structures up to 70s/trim (lot 4) overlapped or folded Struct. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ne Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares

I <5% holes or opaque areas Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unused portion For chry■/Ule: 0.70nm spacing for (020) reflections, of filter Chrysotile 0.00nm spacing for the layer line repeat, streaking portion of (110) and (100) reflections. of filter For ampbibales: 0.00nm layer line repeat, and ■pprox. Portion of flltar (2mm nos) bleat to Amphibole

I 3.0 ratio of non—twinned layer line spot epaetng to layer line repeat distance (0.03nm). esammaUon

✓- EDS spectrum conforming to laboratory Ambiguous identification criteria observed. ; AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 rlbere) Amosite 0= Bundle (>3 fibers <1 fiber diameter apart) 20mm filter I Cracidolite Non —asbestos)

I Co Cluster (>3 intersections) N= Matrix NSD= No Structures Detected L\DATA\PRIVATE\KIKEC\CADD\TEMO ~~

0/22/98 Stopping doves: >00 r/C.O. or n tot 4 C.O. Anthophyllite Tremolite Actinolite Non — Ide n tified

NYC-WTC 000104313