Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS I LAN GROUP # 5762 - 10/25/01 Operator Filter Type MCE 25 mm Lab Sample No. 62236 Filter Area 385 mm"2 Client Spl. No. 22 Grid I.D. 3 Disk No.

Instrument I.D. EM 10 CRX Comments (GO) Area 0.01_34 mm~2 Screen Magnification 16 400X ( q 721 Struct Corspd. to 70 s/mm 2.! No. GO to be Analyzed o Acc. Voltage 80 kV EDS Length I.D. of Structure Nor ✓ (Nonasb. Structure Structure Type G0. Elements 5 um Chr s. Amphibole Nonasb. Ambig./ND No Coord. No F H C M 30 1 5 um >. 5um

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I 1 asbestos- (let 4) J

`- Photo No. (from l in 5 ' Grid accept nce: sir containing samples) To al 1 1507[ uadissolve er, o Aspect Ratio particulate coverage >50% coverage Struct = > o.5um & > 51 <10% squares pattern) at least 20 unfolded or overlapped grid Na Not Observed (BOB spectrum or diffraction or o ■ tie areas 1571; holes Properties conforming Unused portion PaiUve diffraction pattern to laboratory identification criteria observed. of niter Chrysotile For ohryesulr. Q.73nm alci for (020) reflections. Avoided portion

I 0.53Dm spacing for the per of idol and (150) reflections. per amphibole: 0.53nm layer line 3.5 raUs of non—toned layer layer line repeat distance line repeat atr'aa1°a

repeat. and apples. line spot spacing to (0.53cm). portion of niter Urn of to vaaminalion of niter (2mm wide) Amphibole p

Ambiguous laboratory AMPHIBOLES EDS spectrum conforming to

I ideal iFbber criteria observed. intersections - 1-3 fibers) F= Single Fiber (1-3 <1 fiber diameter apart) Be Bundle (>3 fibers C= Cluster (>33 intersections) Stopptn[ 25mm nliar Rules. .ic.o. el ic let 4 G.O. Amoaite Crocidolite Anthophyllite Tremplite Non -asbestos

'Vnn-Identified C = ttmrrri

NYC-WTC 000104113