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← Document results/DEP Box 36/105 DUANE ST 1001650, 151/1
Document / 294 pages

Ambient air sampling report for 105 Duane Street, Feb 2002

Machine-extracted title · confidence 98%

Summary of ambient air sampling and visual observations at 105 Duane Street following the WTC collapse.

NYC-WTC_000104027–000104320

Folder label: “105 DUANE ST 1001650, 151/1

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NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP 8 5'69 - 10%26/31 Lab Sample No. 62513 Filter Type MCE :5 mm Operator________________ Client Sol. No. 0' Filter Area 385 mm"2 Instrument 1.D. EM 10 CRX Grid I.D. DisK No. Screen Magnification 16,400X (GO) Area 0.011Jv mm'2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 6 4.72 Struct. Corsod. cc 7 - mm'-

GO. Structure Structure Type Length I.D. of Structure EDS N arm,' 30.5 um (Nonasb. No Coord. No. F B C M >. Sum Chrys., Amphibole Nonasb. Ambig./NDI Elements < 5 um

2 l v

H

L II

I

Photo Na. ((ram 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra

1 containing samples) StrucL = > O.Sum k > 5:1 Aspect Ratio Grid acceptance: <SOS undiasolve structures u to 70s slim (lot 4) i er, aver appe or o e <10% particulate coverage >50% coverage N- Not Observed (EDS spectrum or diflrsction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or o a ue areas F B Totals

C M > 5um

1 to laboratory identification criteria observed. Unaaed Portion Far ehry.otlle: O.l3nm spacing for (020) reflections. of niter Chrysotile 0.33nm spaaiag for the layer line repeat el:anking Avoided portion of (110) and (lag) reflection. of filter For amphiboles: O.53nm layer line repeal and appear. Portion of filter (2mm side) eubleat to Amphibole

r 3.5 ratio of non-twinned layer line spat spacing to layer line repeat distance (0.23nm1. eeam:nation

V' EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F. Single Fiber (1-3 intersections = 1-3 fibers) Amc alts B. Bundle (>3 fibers <1 fiber diameter apart) Ce Cluster (>3 Interections) 25mm filter Croeidolite Non —asbestos

I r~ Stoppi ng Rule.: Anth e P h Y llite M= liatrts NSD- Na Structures Detected >50 ./C.O. or in let 4 C.O. Tremolite Non —Identified L• \DATA\ PRIVATE\MllCEc\CADD\TEMD 9/22/9e Actinolite

NYC-WTC 000104274

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NYC-WTC_000104274Source: NYC Law Department, mirrored locally

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