Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No. Client Spl. Sc. 15 62522 LAB GROUP #: 075? - :0•:5 0

Fricer Tape MCE 10 mm Filter Area 300 mm Operator r/ ~ •A;

I Instrument I EM 10 =R_?

Screen Magnification 15 4005 Acc, Voltage 80 kV Grid : . D . (GO i Area No. GO CO be Analyzed 3 24 mm"_

6 Disk Sc. Comments 4.7': Sr.- lc- Cerard _ 70 - mm"_

GO. Structure Structure Type Length j I.D. of Structure EDS N or✓ I (von No~ Coord. No. F B C M <O 5 um >. Sum Chrys.1, Amphibole Nonasb. Ambig./ND Elements)

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`T ! Photo No. (fro m 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra fL,JI containing samples) 1 ieptanceT1 structures uc to 70s/ittm (tat 4) StrucL _ > 8.5um & > 5:1 Aspect Ratio <50% undissolve i er. overappe or o e <10% particulate coverage >50% coverage Totals N= Not Observed (Ens spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squared <5% holes or o a tie areas ✓ Positive diffraction pattern properties conforming to laboratory identification criteria portion For chrysotilr. 0.79nm span for (020) reflections, of niter Chrysotile 2.230m spacing for the layer line repeat. streaking Avoided portion of (118) and (198) reflections. of filter For amphibole.: 0.53nm layer line repeat. and approx. (2mm aide) 9.9 rave of non-taloned layer line spot spacing to Amphibole layer line repeal distance (D.S9nm). EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. PHIBOLES P= Single Fiber (1-3 intersections = 1-3 observed.Quaueed fibers) Annoelte B= Bundle (>3 fibers <1 fiber diameter apart) Cc Cluster (>3 intersections) 28mm filter Creeidolite :Yon —asbestos ' N= Netr ~--~ Stooping Rules: il Anthophyllite NSD= No Structures Detected >de s/C.O. or in tit 4 G.U. Tremolite Actinolite Non —Identified U\DATA\PRIVATE\NIKEG\CADD~EN9 9/22/98

NYC-WTC 000104283