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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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Scanned page image, NYC-WTC_000104312
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NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GF.OUP 4 5'5 - 10 22 5 0- Lab Sample No. 62552 F11_ er Type M CP 25 Tm O _otrat_r - '- `i Client Sp1. No 4' Filter Area 295 mm/22 Instrument I.D. EM 10 CB( Grid t C' Disk N . Screen Magnification 16,40OX (GO I Area 0.011Z4 mrn 2 Comments Jkcc. Voltage 80 ky No. GC to .7e Analyzed 4 _VCt =Sort. Cr 7!0

GO. Structure Structure Type Length I.D. of Structure EDS N or,/ o Caord. No. F B >0 5 um (Nonasb. N 5um Chrys. Amphibole Nonasb. Ambig./ND. Elements) Lac —3- ) I T

t

~ I

= __ 111111 Photo No. (from 1 in 5 asbestos- containing samples) ___ ___

Identify all structures usinc EDS d acceptance: __ ____

Check diffraction for asbestos ___

structures uc to 70e iFfim (let 4) ___ ___

Store all unrepeated spectra

Struct = 0.5um & > 5:1 Aspect Ratio <50% 0S undiseo)ve I er. overappe or o e 1<10% particulate coverage >50% coverage Totals N- Not Observed (EDS spectrum or diffraction pattern) FaL least 20 unfolded or overlapped grid squares Positive diffraction pattern properties eonfarnung < 7C ho1es or o a tie areas r D t. IV! i 0 U II1 to laboratory identification criteria observed. Far hrysotLs: 0.73im sp.ctog far (020) rofleeuea.. Unused of filte portion I I 0.5.7nm spacing for the layer line repeat. streaking Chrysotile of (110) and (170) reflection.. Avoided portioe of (titer For ampbibalea: 0.37nm layer lies repast, and appros. Portion of filter (2mm rode) 0.5 ratio of son-tinned layer line spot .pacing to subject to Amphibole layer line repeat distance (0.I3nm). esaminauoo EDS spectrum conforming to laboratory identification criteria observed. AMPHIBOLES Ambiguous g Fe Single Fiber (1-3 intersections = 1-3 fibers) Amosite R= Bundle (>3 fibers (1 fiber diameter apart) 25mm filter C= Cluster (>3 intersections) Crocidolite Non -asbestos M= Matrls Stopping Rules: Anthoph y llite NSUn Na Structures Detected >50 ./0.0. or In tat 4 G.O. TremoIite Actinolite Non —Identified L•\DATA\PRIYATE\MIXEC\CADO%yE)13 0/22/98

NYC-WTC 000104312

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NYC-WTC_000104312Source: NYC Law Department, mirrored locally

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