Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAS G CF 4 D . - - -o Th I Lab SempL= )lc _3 rim c~ra -r , Client Sp . Nc. 13 Piker Area :d5 rr'

J Instrument EM .) CRi: Grid \ G_sh Nc.

Screen Macn_'~.caticn 16 ,400" iGO 1 Area C.0-' mm Comment_

Acc. Voltage 90 kV No GC c_ be Arian:-ed 4 ruc- rsod. - -

J GO No Coord. Structure Structure Typel No. F B IC M < >0 .5 um Length 5um IChrys.l I.D. of Structure EDSN or/ (Nonasb. Amphibole I Nonasb. Ambig./NDI Elements)

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Photo No. (from 1 m S asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) illrid ac2eplance:l structures up to 70s trim (1st 4) <50% undissolved t er, overlapped or folded I LI Struct. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid square, <5% holes or opaque areas >j 5um Positive diffraction pattern properties conformin~ to laboratory identification criteria observed. Unused portion For ehryaoule: 0.7Dnm s amn` for (020) reflection` of alter Chrysotile O.Onm ap.emd for lie layer line repeat. atreakin Avoided portion I of (110) and (130) reflection., Portion of Rltar of 'filter For amphibole.: O.50nm layer line re eat. and roe. (2mm idol 3.5 ratio of non-twinned layer line spat spacing to subiect to Amphibole layer line repeat distance (0.53nm1. eeaminsuan

EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES I Amosite F= Single Fiber (1-3 lntenectiom = 1-3 fibers) I I I 8= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non —asbestos) C= Cluster (>3 Intersection.) stopptn ; Anthophyllite 14 Matrix NS No Structures Detested >5 s/.C O. or m lot 4 G.C. i Tremolite 0 Actinolite 1 Non —Identified I L\DATA\PRIVATE\MIKEC\CADD\TEM3 9/22/98 L

NYC-WTC 000104393