Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS ' LAB GROUP #. 5 41 -

Lab Samci_ Nc. 02544 FL1ter Type MCE 25 mm vperac r L i f r

1 Client Spl. No. 33 Instrument :.0. EM 10 CP.X Screen Magnification 18,400X Filter Area 35° nni Grid I.0 (GO) Area 0.01124 nirn 2 ~2 OLSk NO. Comments Acc Volcage 80 kV No. GO to be Analyzed i .'2: Strucc _orsod. -- ' s mm'2

Structure Structure Type GO. Length I.D. of Structure N or/ EDS I 30.5 um (No No Coord. No. F B C M 5um Chr ys. p Amphibole Nonasb. Ambi g./ND Elements)

y

—c1

I

I I

I

I

r~

I __ ___ITTI ___ ___ __ ____ ___ ___ ___

Photo No. ((ram 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) IGrid acceptance:) structures up to 70e i31m (let 4) <50% undissolved i er, overlapped or folded I I Strucc. = > 0.Sum & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B C M > 5um Positive diffraction pattern properties conforming to laboratory identification criteria Unused portion For chryaoUle: 0.75nm spacing far (02D) reflections. of filter Chrysotile 0.55nm spacing for the layer line repeat, atresam[ El of (110) and (130) reflections. Avoided portion of filter Far amphiboles: 0.55nm layer line repeat, and appros. r (2mm aide) 3.5 ratio of non-twinned layer line spot spacing to Amphibole layer line repeat distance (0.SDnmi. EDS spectrum conforming to laboratory Ambiguous Identification criteria observed. observed.L I AMPHIBOLES I Amosite P= Single Fiber (1-3 Intersections = 1-3 fibers) B= Bundle (>3 fibers <1 fiber diameter apart) 35 mm filter Crocidolite Non —asbestos 0 Cluster (>3 intersections) r —Htopping (tale.: ' Anthophyllite M= Matrix

Li NSD= No Structures Detected L•\DATA\PRIVATE\MIKEC\C.1DD\TEMD > 50 a/c.0. or in tat 4 G.O. 9/22/90 Tremolite Actinolite Non —Identified

NYC-WTC 000104305