Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TENT ANALYSIS LA2 GP.CUP # c _ - 1026,'7_

Lab Samole No. 52588 .-_.ter Th e NC5 28 mm Operac-:-

Clbenc Spl. Nc. 24 .Ater Area ism"- / inscrumenc _ D. EM 10 CRX Grid I . D. 3'-p ']7 ~ Disk Nc

Screen Magnlf1cacion 15.400X iGC, Area 1124 mm Comments

Acc. Voltage 80 kV Nc. GO to ce Analy:ec 4.'21 Strict -rsoc. -. 3 •nos

GO. Structure, Structure Types Length I.D. of Structure N or,/ EDS (Nonasb. No Coord. No. FIB C M I <05 um >. 5um iChrys.i Amphibole Nonasb. Ambig./ND Elements)

_ _

__1

I I I Store all unrepeated spectra J Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos containing samples) Grid acceptance: structures up to 70s f41r (let 4) <50% undieaolve i er. overappa or o ea Strict. _ > D.Sum & > 5:1 Aspect Ratio I <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Jo Positive diffraction pattern properties conforming <5% holes or opaque arose Totals

to laboratory Identification criteria observed.QUnu.ed portion For ahryaoulm 2.73nm e.ein far (020) resections, of filter Chrysotile 0.33am spading for the layer Iinc repeat, stressing Molded portion of (110) and 1170) reflections. of filter For amphiboles: 0.33am layer line repeat, and approx. (2mm wide) Amphibole 3.5 ratio of non-twinned layer line spot spacing to layer line repeat distance (0.33nm). EDS spec m conforming to laboratory Ambiguous identification criteria observed. HIBOLES F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite 0= Bundle (>3 fibers <1 fiber diameter apart) 26mm filter Croeidolite I Non —asbestos C= Cluster (>3 intersections) Stopping Rules: Anthophyllite Mein: NSD= Na 9tructurea Detected > 50 s /0. 0. or m lit 4 C.O. Tremolite Non —Identified Actinolite L\DATA\PRIVATE\MlKEC\CADD'j'EM2 9/22/98

NYC-WTC 000104402