Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

1 - ATC ASSOCIATES N INC. - TENT ANALYSIS LAP GROUP # 5'69 -

Lab Sample No. 62535 Filter :ype MCE 23 mm Operator Client Spl. No. 29 Filter Area ---85 mm"2

I Instrument I D. EM 10 CR:!

Screen Magnification 16,4001;

Acc Voltage 80 kV Grid

(GO I

Area D. •~ ~'

: .7:1:-1 mm':

No. GO to be Analyzed 7 Disk No.

Comments

4721 Struc- Ccrsod. .r 77 s mm"'_

I GO. No Coord. Structure Structure Type No. F B C M >0.5 um < 5 um Length > 5um Chr ys.! I.D. of Structure Amphibole p EDS N cry ' (N Nonasb. Ambi g./ND, Elements)

I I

I

J

"Photo No. from 1 in 5 asbestos- Identify all structures ustiig EDS Check diffraction for asbestos Store all unrepeated spectra J containing samples) Grid acceptance: structures u to 70n tttm (let 4) StrucL = 0.5um & > 5:1 Aspect Ratio <50% undlssolva tutor. overappe or o e <10% particulate coverage >50% coverage Totals Na Nat Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <0% holes or opaque areas Ii u (t2 >1 U um Positive diffraction pattern properties conforming to laboratory identification criteria observed. Ua...d portion I I I For abry.otilet 0.73nm spacing for (020) reflection.. of filter Chryso til e 0.53nm spacing for the layer line repeat. streaking Avotdad portion of (110) and (150) reflection.. of filter For amphibole.: 0.50nm layer line repeat, and approx. Portion of filter (2mm .tda 3.5 ratio of non-teinned layer line spot spacing to sublact to ssammation ) Amphibole layer line repeat distance (0.50nm). t/= EDS spectrum conforming to laboratory I Identification criteria observed. AMPHIBOLES Ambiguous F: Single Fiber (1-3 intersections - 1-3 fibers) Amosite 8a Bundle (>3 fibers <1 fiber diameter apart) C Cluster (>3 Intersection.) 22mm filter Crocidolite Non-asbestos Ya Mani Stepping awe.: Anthophyl(lte NSDa No Structure. Detected I >20 ■/0.0. or in lot 4 C.O. Tremolite I L•\DATA\PR1vaTAMlERG\CADD~EM7 9/22/9. Actinolite No n - Identified

NYC-WTC 000104296