Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS Li :,ab San.pl- N_

=i_ent Spi. No -k6 CAB GROrip d

F:ar 5 7^ - -

Type MO Araa 285 rnn2 .S 24 vim . - . I^

I tnsCr'lment 1.0. CM 10 CR Scr_en Magnification 18,400X

Acc Voltage 80 kV Grid _.D. lcc, Area Ct ~/

0.0'-1_'4 mM^ 2

No. GO to be Analyzed Ds: No. Comments 4.7" St ,- 'lc' ,`oranri ?) _mm"

GO. Structure Structure Type Length I.D. of Structure EDS N or,/ >0.5 um (Nonasb. No Coord. No. F B C M - 5 um > Sum Chrys .! Amphibole Nonasb. Ambig./ND Elements)

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Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Chock diffraction for asbestos Store all unrepeated spectra containing samples) crud acceptance:J structures up to 708 aim (let 4) I <50. undiseolved filter, overlapped or folded I S Cruet. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) let least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M > 5um

I Positive diffraction pattern properties conforming to laboratory Identification criteria For ehryaoula: 0.73nm spasm■ for (020) reOsctions. a.39em apaeina far the layer line repeat. streaking of (110) and (130) reflection., For amphiboles: 0.39nm layer line repeat, and ■pproa. 3.3 ratio of non-twinned layer line opal spacing to on Unused poruon of filter Arotded portion of filter (2mm videl Chrysotile

Amphibole layer line repeat dlotance (0.39nm).

1 EDS spectrum conforming to laboratory identification criteria observed. P= Single Fiber (1-3 intersections a 1-3 observed.&~72~sArriclsxtc Ba Bundle (>3 ftben <1 fiber diameter apart) fibers) 23mm filter AMPHIBOLES

i Crocidolite Ambiguous

Non — asbestos C= Cluster (>3 Intorsectionz) Stopping Rules:

1 Mo Matrts NSD= No Structures Detected t_•\DATA\PRIVATE\XIXEG\GOD\7XX3 9/22/98 >50 r/G.o_ or in lot 4 c.O. L___1 i Tremolite Actinolite Non -Identified

NYC-WTC 000104311