Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP # 5761 - 10/25/01 ~J Operator Filter Type MCE 25 mm Lab Sample No. 62201 Filter Area 38 mm Client Spl. No. 28 Disk No. Grid I.D. Instrument Z.D. EM 10 CRx Comments (GO) Area 0.01124 mm"2 Screen Magnification 16,a 0ox CorsPd to 70 s/mm 2.' 6 ( 4 721 Struct No. GO to be Analyzed Acc. Voltage 80 kV EDS Length I.D. of Structure Nor ✓ (Nonasb. Structure 3v1Qt"re g GO. 30.5 um > 5um Chr s. Amphibole Nonasb. Ambig./ND Elements No Coord. No. F BC M < 5um

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HH Photo No. from 1 in S nabeetoa- containing samples) _ Identify all ■fractures udn HDS rid acceptance: r, for am structuresracUto Check

overlapped or o e (lot 4) 4ierw ail anroeeated apectrii

Totals 1 <50% undisaolve Ratio <10% particulate coverage >50% coverage Struct. = > 0.5um & > 5:1 Aspect overlapped grid squares spectrum or diffraction pattern) at least 20 unfolded or Na Not Observed (SOS <5% holes or o a ue areas positive dtttneUoc pattern Prn~ conforming Uauaad portion laboratory Identification criteria observed• of fitter Chrysotile to For cbry■oUle: 0.73nm ■WN for (020) r.fl.oaone.

1 l■p.r llus rapsat. stn■kiot AvoldN portion 0.53nm ■paci°{ far the of ruler of (110) and ( 80) m Un s. Portion or filter (2mm .ids) Amphibole Per 0.63nm layer ling repeat. and appro■. to subject to 3.5 retie of non-unread la ytr line spot spacing lisleissuan layer line repeat distance (O.i3nm)• MPHIHOLEs Ambiguous SOS spectrum conforming to laboratory

I identification criteria observed. P= Single Fiber (1-3 Inter.ecUona S. Sundle (>3 flben 'Cl fiber C= Clu■ter Y= Ystri■ (>3 tnlersecUow) = 1-3 fiber.) diameter apart) SlaPpic 25mm ❑list s 8d1 >so ■/C.O. or in l.t 4 G.O. FA Arno Site CI OC idallte nl)tophyllite Tremolite Non — asbestos

Non —Identified NYC-WTC 000104211