Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP 4: 5 - 1a'26'01

e Lan Sam.._ No . 259: F[_t_r Type MC_ 25 mm Operator 1 C11en[ Spi. No. 25 Filter Area 3d5 mm"2 t '*k I Instrument I.G. EM 10 CRX

Screen Magnification 16.400X

Arc. Voltage 60 kV Grid I.G.

iGO 1

No Area S

0.0:124 mm"_

GO to be Analyzed 6 Disk No.

Oomments

4.1:1 3tr.ct Corsod. to '.i smm"2.

GO. Structure Structure Type Length I.D. of Structure EDS N ori/

0 5 um (Nonasb. No Coord. No. F B C M >. 5um Chrys. Amphibole Nonasb. IAmbig./ND Element.$)

—v —v

I I I

I I

1 Photo No. (from I in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra J I containing samples) 1Grid acceptance:j structures up to 70e ifim (let 4) <SOx undissolved filter, overlapped or folded u Struct. _ > O.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N. Not Observed (EDS spectrum or diffraction pattern) lot least 20 unfolded or overlapped grid squares PosaUve diffraction pattern properties conforming <5x holes or opaque areas I -r D U m .. - JLL111 to laboratory identification criteria observed. Unused portion I i For chryssUlr. 3.770m ■racint for (020) reflections. of filter Chrysotile 0.33om spacing for the layer line repast. streaking Avoided portion of (110) and (100) reflections. of filter For amphibuler. 3.53am layer line repeat. and sppry . Pertion or filter (2mm vide) 3.3 rats of non-tsrlaned layer line spot spacing Ia subject to Amphibole layer Zion repeat distance (a_in.m). asamtnatlon

EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite B= Bundle (>3 fibers <1 fiber diameter apart) Clus Matitir (>3 intersections) 23mm filter Crocidolite - Non—asbestos Nn NSD= Na Structures Detected Stepping Rules: >30 s/0.0. or in 1st 4 C.Q. j Anthophytlite Tremolite Actinolite Non —Identified L\DATA\PRIVATE\MIKEG\CADO\TEM3 9/22/98

NYC-WTC 000104404