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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_000104272
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NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No.

Client Sp:., No 6251

05 LAS GROUP # 5T59 - 10/25/0_

Filter Tyne MCE 25 mm

Filter Area 355 mmm -1 Operator L. -

Li Instrument I.D. EM 10 CRX

Screen Magnification 16.400X

Acc. Voltage 80 kV Grid I.D.

(GO) Area O 01124 mm-2

No. GO to be Analyzed d Disk No.

Comments

4.72: Struct. Corsud. to ,_ s'mm"2

I GO. No Coord. Structure Structure Type No. F B C M ,0.5 < 5um Length ur`1 >. 5um Chr Ys. Amphibole p I.D. of Structure EDS N or I/ nasb. Nonasb. Ambi g./ND Elements)

J`7

1 1

1 1

Photo Na. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra - containing samples) Grid acceptance: structures u to 70e nim (lot 4) <50% undissolve 1 T. overiappe or e e Struct. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares

t/ Positive diffraction pattern properties conforming <5% holes or opaque areas F B C M >, 5um to laboratory identification criteria observed. Unused portion For ahrysoUle: O.72nm spscln` far (020) resections. at filter Chrysotile 0.33nm spacing for the layer lne repeal, streaking Avoided portion of (110) and (130) raneauons. of filler Per amphiboles: 0.33nm layer line repeat. and appros. Portion of filler (2mm wide) 3.3 ratio of non-twinned layer line spat .poems m sublect to Amphibole layer line repeat distance (O.SSnm). examination

t= EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES ~ ~ I P= Single Fiber (1-3 Intersections = 1-3 fibers) AmoOlte 5= Bundle >3 fibers <1 fiber diameter apart) 23mm filter Crocidolite Non —asbestos C= Cluster )>3 intersections) g(epping Ruie.: Anthophyllite

I, M= Matrix >30 or In let 4 G.O. Tremolite NSD= Na Structures Detected Non —Identified Actinolite L•\DATA\PRtVATE\MiKEG\CADOVfEM3 5/22/90 i

NYC-WTC 000104272

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NYC-WTC_000104272Source: NYC Law Department, mirrored locally

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