Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP 4. 5 09 - 1J_'5-'01

Lab Sample No. 52533 Filter Type MCE 25 mm Operator (,u. L Client Spl. No. 21 Filter Area 385 mm"2

Instrument 1.O. EM 10 CRX Grid I.D. `J ' ," Disk No. Screen Magnification 15,400X (GO! Area 0.0:1 24 mm"2 Comments Acc. Voltage 90 kV No. GO to be Analyzed 5 4.721 Struct. Corsnd to '2 s'mm

GO. Structure structure Type Length I.D. of Structure EDS N or t/ 30.5 um (Nonasb. No Coord. No. F B C M >. 5ufn Chrys. Amphibole Nonasb. Ambig./ND Elements) 5 um

G f~% —

I

I

Photo Na. (from 1 in 5 asbestos- Identify all atructuree uain EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Gnd acceptance: structures tao Lo 70e yam (tat 4) Struct. _ > 0.5um k > 5:1 Aspect Ratio <S0% undissolve 1 er. overlappe or o e <10x particulate coverage >50% coverage Totals Na Not Observed (Ens spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5S holes or a e tie areas Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unuaed portion For chryaotile: 0.73nm •pacin( for (020) reflections, of filter Chr ysotil e 0.37am spacing for the layer line repeat. streaking Avoided portion of (I10) and (130) refleenone. of filter Far amphibelea: 0.53am layer line repeat. and apprea. Portion of filter (2mm .ids 3.3 ratio of non-twinned layer line .pat spacing to aaeleet to sumication ) Amphibole layer line repeat distance (0.53nm). EDS spectrum confo rming to laboratory Ambiguous Identification criteria observed. AMPH_SOLES Fa Single Fiber (1-3 intersections = 1-3 Ilbere) Amoaite B= Bundle (>3 fibers <1 fiber diameter apart) (>3 Intersections) 25mm filter Crocidollte Non —asbestos M~ Matrlei Stopping Rules: Anthophyllite NSD= No Structures Detected >s0 ./c.0. or in let 4 0.0. Tremolite Non —Identified Actinolite ti\DATA\PRIVATE\MIEEO\CADDU'EM3 9/22/98

NYC-WTC 000104294