Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP d 575 9 _ _s Lab Sample No, 6253? Fi_c_r T;-pe MC? mm CPeraor _ Client SpI No. 32 F_lter Aree 385 mm"2 Inscrumenc I.D. EM 10 CRS Grid I.C. '1 Disk Nc. Screen Magnification 16,400X (GO) Area O.)1124 mm': Comments Acc. Voltage 80 kV No. GO tc be Analyzed 6 4721 Struc0 Cersod. cc 7C s mm'_

GO. Structure Structure Type Length I.D. of Structure N or/ EDS >~•5 um ( . No Coord. No. F B C M sum ChrYs. Amphibole Nonasb. Ambi g./ND Elements) < 5 um P

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L Photo No. (from I in 5 asbestos- Identify all structures ua,n EDS Check diffraction for asbestos Store all unrepeaLed spectra containing samples) Grid acceptance: structures u to 70s f~tin (1st 4) StrucL = > 0.5um & > 5:1 Aspect Ratio <50% par t cu l t l er, overappe or o e Totals <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares <5% holes or opaque areas r O t, m 'i uizt Positive diffraction pattern properties conforming i to laboratory identification criteria observed. Unused portion of filter For ohryrotilm 0.79nm spaclnc far (020) rsneotlona. 2.23nm spamng for the layer line repeat. streaking Chrysotile of (ito) and (10a) reflection., Avoided portion of niter For amphibole.: 0.39nm layer line repeat. sea ■pprox. Peruse of filter (2mm aid.) 3.2 ratio of non-twinned layer use spat spacing is is nubiact Amphibole layer line repeat distance (0.SSnm). a.a-.naUan

EDS spectrum conforming to laboratory identification criteria observed. ~~ AMPHIBOLES Ambiguous F- Single Fiber (1-3 Intersections = t-3 fibers) Amosite Ba Bundle (>9 fibers <1 fiber diameter apart) C= Cluster (>0 Intersections) 22mm filler Croeidolite Non —asbestos Matrix Stopping Rules: Anthophylhte SD= Sic o Structures Detected >SO •/C.0. or to lot ♦ C.O. Tremolite Non —Identified Actinalite i:\DATA\PRIVATE\IIIKEG\CAD0'. EM3 9/22/98

NYC-WTC 000104300