Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ASSOCIATES INC. - TEM ANALYSIS ATC - 10 25;01 LM GROUP # 576 Operator Filter Type MCE 25 mm Lab Sample No. 62198 Filter Area a mm" 2 CJ LJ Disk No. Client Spl. No. 25 Grid I.D. Instrument I.D. EM 10 CRX Comments (GO) Area 0 Oli 4 mm 2 to 70 s/mm"2.! 4 721 Struct Corsnd Screen Magnification 16 400% 6 No. GO to be Analyzed Acc. Voltage 80 kV EDS Length I.D. of Structure Nor✓ (Nonasb. Type GO. Structure 9trucwra )O.5 um Am hibole Nonasb. Ambig./ND Elemen th Chr s. No Coord. No. F B C M < s um >. 5um

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1" 1!!!- asbestos- Identify all a ~ Gture■scceptanaeD$ Ctleca Clara.:.+.... •-• — structures u to 70s rn (let 4) --- `Photo No. from 1 in 5 Tot containing samples) <50% undi■solve r. overlapPed or bide coverage 0.5um & > 5:1 Aspect Ratio t 10x pet ioulate coverage >50% Struct. = spectrum or diffraction Pattern) at bout 20 unfolded or overlapped grid square' N= Not Observed (BOB <5'x holes or o ■ tie areas unused Porno= ~ = Positive diffraction pattern criteria Identification properties conforming observed. of niter Chrysotile to laboratory mnsoUons. for (020) Avoided portion •pact For ehryeaWet 0.73nmthe lger Uno repeat. etrukUK O.53am eeaolot for renscuaoe. of alter parttan or alter (2mm dds) Amphibole of (LID) -and ( 30) layer line raPeat. and .PPros• tabled to For amphiboles: D.53nm labyoarr Ilea 'Pot epaelna to aaaminaU.0 3.5 ratio of non-twinned layer tine repeat distance (0•Were). Ambiguous to laboratory AMPHIBOLES EDS spectrum conforming Identification criteria observed. AmOelte Non-asbestOf Intersections - 1-3 fibers) 25mm niter Clocldolite F= Single Fiber (1-3 diameter sport) fi bers <1 fiber B= Bundle (>3 intersections) Ruiar. Aniho P h Y Mite SlapPtn{ c= cluster (>3 Trernolite '40n —Identified

NYC-WTC 000104208