Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

TEM ANALYSIS n ATC ASSOCIATES INC. - LAB GROUP #: 5762 - Filter Type MCE 25 mm Operator Lab Sample No. 62227 Filter Area 385 mm"2/ n /1 I Client Spl. No. 13 Grid I.D. /1~5)— Disk No. Instrument I.D. EM 10 CRX Comments (GO) Area 0.01124 mm 2 Screen Magnification 16 400X ( q 72, S•ruc• Corsod. to 70 s;mm-` 00 kV No. GO to be Analyzed 6 I Acc. Voltage EDS Length I.D. of Structure N or / (Nonasb. strueturo Type co. Structure Nonasb. Ambig./ND Elements G X0,5 um Amphibole No Coord.I No. tFI C M < 5 um >. Sum Chr s.

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1 ( 1 1 1 Chi identify all structures usin EDS (let 4) Photo No. from 1 in 5 asbestos- acceptance: all containing samples) Ratio Grid undissolve <SO! Ot 1S Struct. _ > O.Oum o. > . 5.1 Aspect <107L parUeulate coverage •wares d q unfolded or overlapped grid diffraction pattern) at least 20 N= Not Observed (EDS spectrum or <S% holes or opaque areas eeeformlrt~ positive diffraction pattern properties Unused pertlon to laboratory identification criteria observed. of nnar Chrysotile For ebryaotlls: 0.73nm apaela("for (020) rsnactlona.

L la7ar Ilse re peal. streaking Aro1dN portion O.53nm spacIna for the of filler (t of (110) and (130) reflectlotu. Portion of filter (2mm wide) Amphibole For amphlbeles: C.03nm layer line rupeuL and appros. ambjacl m line spot ■pastas to 3.0 ratio of non-twinned Uyar a:amlaaLion layer line repeat distance (0.03nm). AMPHIBOLES Ambiguous v/ SDS spectrum conforming to laboratory

I identficatten criteria observed. F= Single Fiber (1-3 intersections S= Oundle (>3 fibers <1 fiber C= Cluster 3 K= Yatrl: intersection') = 1-3 fibers) diameter apart) 25mm filler Stop pion 8ulae. >30 ./c.o. or In 1.1 4 0.0. pmoeite Crocidolite pnthophyllite Tremolite Non — asbestos N on —Identified

NYC-WTC 000104105