Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAS GROUP 4 S 61 - 10 25 0' f /Q

Filter :'ype MCE 2S mm Operator G~ Lab Sample No. 62210

Client Sp1. No. 37 Filter Area 385 mrt'.~2 Grid I.D. yj~ 0 Disk No. Instrument I.D. EM 10 CRX 0.01124 mm"2 Comments Screen Magnification 16,400X (GO) Area 6 Struct. Corsod. to 70 S mr A ' vnlraae 80 kV No. GC to be Analyzed

EDS Length I.D. of Structure N or/ Structure Structure Type GO. (Nonasb. No. X0.55 um > 5um Chrys. Amphibole Nonasb. Ambig./ND Elem ents No Coord. F B C M < um

J — cv _e3

--

6 —

Li I

H I IJi I - rnota ao. trrom r m - e containing samples) s.... -

Aspect ..........-

Ratio _.. ----- Grid acceptance: <5O7t undisso at -- r%.-i, Airr-oien for asbestos structures u to 708 r, over apps er o e m (1st 4) Store all unrepeated spectra-

Totals StrucL _ > 0.5um & > 5:1 <1O7L particulate coverage >SWL eovera~e unfolded or overlapped grid squares Not observed (BDs spectrum or diffraction pattern) at least 20 B C <5% holes or o a ue areas Positive diffraction pattern properties twntormin~ No to laboratory identification criteria Unused portion For ebrysaUlr. 0.79nm spacing for (0 ) reflections. of rOter Chrysotile 0.55nm spacing for lie layer tins repeat. streaking Avoided portion o1 (110) and (130) teflecUona. of filter For ampblboisa: O.5.7oin layer line repeal. and approx. (2mm side) Amphibole 0.5 ratio of non-tslnned layer line spat spacing to • layer line repast distance (0.53nm). sppeeccum conforming to laboratory SOS spectrum PHIBOLES Ambiguous identification criteria observed. observed.a Amosite P= Single Fiber (1- 9 intersections - fiber s) . B. Bundle (>3 fibers (1 fiber diameter apart) 25mm tu to r Crocidolite Non — asbestos Co Cluster (>9 intersections) Stales: K= Matria 1-3 >50 ./coo. or to tot a coo. Tremolite NSD= No Structures Detected L_ Actinolite Non —Identified

NYC-WTC 000104220