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 - 10/25/01 Operator Filter Type MCE 25 mm Lab Sample No. 62249 Filter Area,3 5 mm"2j Client Spl. No. 35 Disk No. Grid I.D. ~7/ Instrument I.D. EM 10 CRX 0.011 4 mm"2 Comments (GO) Area Screen Magnification 16,400X Corspd to 70 s/mm"2 ' 6 ( 4.721 Struct 80 kV No. GO to be Analyzed Act. Voltage

Length I.D. of Structure N or,/ EDS (Nonasb. strucenra Type RGO. Structure No. 3 Bum Chrys. Amphibole Nonasb. Ambig./ND Element ' 00rd. F BC M <C5 um

I I I I I I I 1 r....h■■tn■ Store all unrepeated spectra J No. from 1 in 5 asbestos- Idenury ail ■cr..c~ - ...••• `Photo .tructuree u to 70s t~tm (lot 4) containing samples) Grid ■ceep4nce: <0 undlesolve r, overlapped or o ~L coverage e Totals Struct. = > 0.5um & > 5:1 Aspect Ratio parflculata coverage >00%

I N- Not Observed (cm s pectrum or least 20 unfolded or overlapped grid sq uares <1107L% diffraction pattern) at ✓v Positive diffraction pattern properue■ conforming to laboratory identification criteria observed. <5% holes or o ■ ue area. Unused portion Chrysotile

II of niter For ehryaot*1u 0.73mm ■ el lino for (020) reflections. repeat. streaking Melded portion OA9nm spacing for the layer or titter of (110) and (100) reflections. of niter For ampma•lss: 0.08nm toyer line repeat. and appros• pOit ..Uon (2mm vide) Amphibole to 3.5 ratio of non-tetaned layer line spot spacing umloWoc layer line repeat distance (0 53cm).

Ii EDS spectrum conforming to laboratory pMPHIHOI.ES Ambiguous identifIcation criteria observed. Amosite as = 1-3 fibers) F= Single Fiber (1-3 inlereer diameter apart) 20mm niter Crocidolite Non — asbesto s B. Bundle (>S fiber. <1 fiber Anthophyllite C= Cluster (>3 intersections) Stapp -a Rules: M= Matrix >90 ./0.0. or in lst 4 0.0. Tremolite Non —identified NYC-WTC 000104126