Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

1 ATC ASSOCIATES N INC. - TEM ANALYSIS r Lag GROUP #' 0759 - 1 ,25'0• I Lab Sample No 52517 Filter Type MCE 25 mm Operator v ~~ _ Client Spl. No. 04 Filter Area 0 mm

Instrument =.D. EM 1 0 090< Grid 2.0 Di5K No.

I Screen Magnification 15,400X (GO; Area 3.01124 mm -2 Cjmments Arc. Voltage 80 kV No. GO to be Ana1y_ad o 4.721 Scrucc. Corsod. Oc G s mm':

I GO. 10 Coord. Structure Structure Type No. F B C IM 30.5 um 5um Length

I >. 5um Chrys.1 Amphibole I.D. of Structure N or/ Nonasb. !Ambig./NDJ Elements) I (Nonasb. EDS

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ilk ---- I w I

I

I 1 t Photo No. ((ram 1 in 5 asbestos- containing samples) Struct. = ) 0.5um k > 5:1 Aspect Ratio Identify all atructurea uain EDS

N- Not Observed (EDS spectrum or diffraction pattern) 'Grid acceptance:) Check diffraction for asbestos structures up to 7Oe fnm (let 4) <50% undiaaolve fiLer, overlapped or (aided <10% particulate coverage >50% coverage let least 20 unfolded or overlapped grid squares <5% holes or opaque erase Stare all unrepeatad spectra

Totals _j

Positive diffraction pattern properties conforming F B C M > 5um to laboratory Identification criteria observed. Unusea poruca For chrysotliet 0.72om •pacing for (020) reflection,, of filter 0.57am opaeleg for the layer line repeat, streaking Chrysotile Avoided perUoa of (lie) end (iao) ronsetions, of filter For amphibole•: 0.23nm layer line repeat. and approx. Portion of niter (2mm aids) 3.5 ratio of non-thinned layer line spot .posing la aubleet to examination Amphibole layer line repeat dlatanee (O.SDnm).

V ' EDS spectrum conforming to laboratory Identification criteria observed. Ambiguous AMPHIBOLES F- Single Fiber (1-3 lnteraectlons = 1-3 fibers) Afnasite 1 B= Bundle (>0 fibers <1 fiber diameter apart) 25mm ruler Crocidolite Non -asbestos C= Clus t Cluster >3 rs ti inteecons --~ aide,:

I M= Matrix Stopping Anthophyllite NSD= Na Seructurea Detected >50 s/G.O. or In lot 4 G.O. Tremolite Actinolite Non -Identified V\DATA\PR1VATE\MIMEG\CADDVEM3 9/22/98

NYC-WTC 000104271