Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

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ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5762 - 10.'25 Cl Operator Filter Type MCE 25 mm Lab Sample No. 62221 Filter Area 385 mm"2 ~ Client Spl. No. 7 Disk No. Grid I.D. r Instrument I.D. EM 10 CRX •2 Comments (GO) Area 0.01124 mm Sc V Magnification 16.400X to 70 s/mm"2. 1 6 ( 4 721 Struct. Corspd No. GO to be Analyzed Acc. Voltage 80 kV EDS N or t/ Type Length I.D. of Structure (Nonasb. GO. Structure Sv1Qture urn >. Bum Chrys. Amp hibole Nonasb. Ambig./ND Elements) No Coord. No. F B C M <05 um

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1 H `Photo No. from 1 In 5 asbestos- containing samples) HH ►denary au t 5arucwr=s .e... o -••--- - to __ _ tttm (let 4) . __ ________ e...~ .n ......,nested soeetre

Struct = 0.5um & > 5:1 Aspect Ratio (50% uudieaolve r.s overlappedUor o70e <10% particulate coverage >50% coverage Totals overlapped grid squares diffraction pattern) at least20ouunfoldedor N- Not Observed (EDS spectrum or arose PosiUvs diffraction pattern properties conforming Unused rtioa to laboratory Identification criteria observed. of po Chrysotile For ¢h 0.79mm •Wei for (020) nrtscUong. spacing for the latter 7Ins re stnaWng Avoided p¢rUoa 0.Wom *pacing of (110) and (130) reflacUoma. of niter For amphibene*: OA9nm toyer ling spat. and appns. Portion of filter Subject to (2mm vide► Amphibole to 3.5 ratio of ocn-tvlaoed la r ling 51101, spacing summation layer ling spat distance (0.09nm).

EDS spectrum conforming to Laboratory Ambiguous AMPHIBOLES ldemtfiaaUon criteria observed. Amosite F. Single Fiber (1-3 interactions = 1-3 fibers) B. 25mm filter Crocidolite Non - asbestos Bundle (>9 fibers <1 fiber diameter apart) C= Cluster (>9 intersection) 9teppisg Ruler. Anthophyllite Mn Matrix - ^• _ >So ,/0.0, or in .., s CO. Tremolite Non -Identified

NYC-WTC 000104099