Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No. 62233 LAB GROUP #: 5762 - 10/25/01 Filter Type MCE 25 mm Operator

I Client Spl. No. 19 Filter Area 8 mm"2L Instrument I.D. EM 10 CRX Grid I.D. ~ Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kV No. GO to be Analyzed 6 4.721 Struct. Corsod. to 70 s/mm"2. 1

I GO. No Coord. Structure structure Type No. 30.5 um Length I.D. of Structure EDS N or,/ (Nonasb. F B C M < 5 um >. 5um Chr s. Amphibole Nonasb. Ambig./ND Elements) Iiv / U V2_ii '7 _Z)

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ri Li I I Photo No. (from 1 in 5 asbestos- containing samples) Identify all structures usin SOS Grid acceptance: Check diffraction for asbestos structures tan to 70a Ism (bat 4) Store all unrepeated spectra J Struct = > 0.5um k > 5:1 Aspect Ratio <50% undissolve r, orer apps or o e particulate coverage >50% coverage Totals I N- Not Observed (KOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming to Laboratory identification criteria For ehrysoUls: 0.73nm spaeln for (020) resection. s 0.03nm spacing for the layer Sine repeat. streaking isu% holee or opaque areas Unused portion of !biter Arolded portion Chrysotile _ _ -

of (110) and (130) reflections. of filler amphiboles: 0.53nm layer line repeat, aed approx. ( 2mm aide) 3.5 ratio of non-twinned kyer line spot spacing to Amphibole Layer line repeat distance (0.03nm). I Par spectrum conforming 14enfi.a crri oee~d~~ ntory PHIBOLES Ambiguous F= Single Fiber (1-3 Intersections = 1-3 fibers) observed.a7Arnosite Su Sundle >3 fibers <1 fiber diameter apart) 25mm railer Crocidollte Non-asbestos I. lu = >3 intersections) I Slapping Sular. Anthophyllite NSDu No Structures Detected >50 s/C.0. or in let 4 C.0. Tremolite Actinolite Non-Identified L•\ DATA\ PRIVATE\ MIKF.C\ CARD\TPr^ o /~ /ar

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