Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS 01 LAB GROUP #: 5762 - 10!25 Filter Type MCE 25 mm Operator Lab Sample No. 62239 Filter Area 385 mm"2 Client Spl. Na. 25 Disk No. Grid I.D. Instrument I.D. EM 10 CRX Comments (GO) Area Mm2 0.01124 Screen Magnification 16 4DOX to 70 simm 2. i 6 ( 4.72: Struct. Curs d. No. GO to be Analyzed Acc. Voltage 80 kV EDS Length I.D. of Structure Nor ✓ (Nonasb. GO. Structure Structure Type Amphibole Nonasb. Ambig./ND Elements ~0 5 um >. 5um Chr s. No Coord. No. F BC M < 5um

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Spectra eat Store all uarepeaLed etructurieeruction for Check in 5 asbestos- Identify all structures us(n BDS to 70e/&n% (let 4) `Photo No. from 1 Grid acceptance: containing samples) <S07G undlssolve r, overlapped or o e' coverage Totals 1

Struct =) O.Sum & > 5:1 Aspect Ratio <to% particulate coverage >S0% grid squares dlftraeuon patters) at least 20 unfolded or overlapped F B C M > 5um N= Not Observed (RDS eP°Ctruca or <SR holes or opaque areas prepertles conforming ✓ n positive diffraction pattern criteria observed• to laboratory identification Unused portion of titer Chrysotile For 0brysutils: 0.79nm rpeaL s~atil:eli• avoided peruse O.S9nm spawn for ~• la slayer li::S of filler of (110) and (190) retie lave apPros. (2mm etd-) Amphibole For unpWbo,": O.O9nsd layer Una re peat. and POn ° bled e ar MUc of non-tvinnad t■yar ling spot spacing tO seele O se 3.0 layer ling repeat distance (0.09nm). Ambiguous BDS spectrum conforming to laboratory AMPHIBOLES identification criteria observed. Amosite intersections - 1-3 fibers) 25mm filter Non—asbestos Fa Single Fiber (1-3 fiber diameter apart) Crocidolite B- Bundle ((>S fibers <1 Anthophyllite c= Cluster (>3 intersection■) stopping Rules; N- ber.:. ,gin .ic 0 0r In let 4 c.o. Tremolite 'vnn_IdenLifted

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