Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I... ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP # 5762 110/25 11 I ' Operator Filter Type MCE 25 nn Lab Sample No. 62253 ,2 Filter Area 385 Client Spl . No. 39 Disk No. Grid I.D. Instrument I.D. EM 10 CRX Comments (GO) Area 0.01 1'-4 m~2 to 70 s/mm-2 Corspd Screen Magnification 16 40oX ~ 4 721 Struct No. GO to be Analyzed I Acc. Voltage 30 kV EDS I.D. of Structure Nor ✓ (Nonasb. Structure Length Elements GO. Structure Type Nonasb. Ambig./ ND o 5 um g Chr ys. Amphibole ' No Coord. No. F B C M

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I I 1 1-1

I F ii i ii i1 _ ii '!!!~=~ Identify all structures usinnce: 605 t nece """"-" =--' --- film (fat 4) Photo No. from 1 in 5 as bestos- Grid accepta structures u to 70s folde eoataining samples) t 30% undittsmlva r, over apps or To_ I Struct - No 0.5um & > 5:1 Aspect Not Observed (203 spectrum Ratio or diffraction pattern) at properti conforming Po.luve diffraction pattern criteria observed. <10% particulate coverage least <5% holes unoo ad d o 20 or >50% coverage gre'overlapped grid squares r

Uousad portion Chrysotile v ' to laboratory identification of niter for ) Avoided porUon

I For eh .pa l : Sfor

For flan) and (130) amphiboles: the 0.55am "i spawn[ Uta la r I of(110 spnatvj for tefleetll

layer line repeat nod ae layer layer 7.5 U. or son-tdleteaee (5.53n0). pe repi at. ae sttreaking

Iane repeal, sad apPrea• flee .pot spaafnt le Portion of sualeet to .samiaatlon r of titter (2mm side) Amphibole

Ambiguous to laboratory AMPHIBOLES

Ii, Bps spectrum conforming V' Identification criteria observed. intersections = 1-3 fibers) F. Single Fiber (1-3 <1 fiber diameter apart) 25mm filar E Afnoeite Crocidolite No n —asbestos S= Bundle (>3 fibers n ecuon.) Stepping gulp: Antho .t h Ilite c= Cluster >3 inte F. To te NYC-WTC 000104130