Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP # 577. - 1 /20 01

Lab Sample No. 5253' FAter Type MC= 25 mm O peraror

Client Spi No. 2 3 Filter Area 335 mm"2

Instrument I.D. EM 10 CRX Grid I D sx No.

Screen Magnification 16,400X (GD( Area 0.0_124 mm"2 Comment;

Acc. Voltage 80 kV No. GO tc be Analyzed 4.721 Strtc= Corsod. to amm"

GO. Structure Structure Type Length I.D. of Structure EDS N or,/ ' (Nonasb. No Coord. No. >0.55 um F B C M < um > 5um IChrys.; Amphibole Nonasb. Ambig./ND Ele m ents

I I I I I I I I El] Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra - 1

I containing samples) Struct. = 3 0.5um & > 5:1 Aspect Ratio iGrisi acceptance: <50% undissolve structures up to 703 rim filter. overlapped or folded <10% particulate coverage >50% coverage N- Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares <5% holes or opaque areas I (let 4)

F B Totals C M - 5um Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused portion

I For chryootile: 0.79nm ■ppactn` for (020) retleouons. Osanm epaetag for the layer llne repeat, streaking of (110) and (190) refiaeuena. Per amphiboles: 0.23nm layer line repeat, and approx. 3.3 ratio of non-twinned layer line spot spacing to I Portion m n of filter biectti esamma of filter ofotded portion of flltnr (2mm vide) rysotile

Amphibole layer line repeat distance (O.33nm).

I EDS spectrum conforming to laboratory identification criteria observed. F= Single Flber (1-9 intersections = 1-3 fibers) D= Rundle (>3 fibers <1 fiber diameter apart) C aatrix (>9 intersections) M= Cluster 29inm filter AMPHIBOLES Amosite Crocidolite Ambiguous

Non-asbestos , gipping Rules: L^ I Anthohhyilite

I NSD= No Structures Detected L.\DATA\ PRIVATE\MIICEG\CADO\TEM3 >30 s/0.3. or in let t C.O.

9/22/98 I Tremolite Actinolite Non- Identified

NYC-WTC 000104401