Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM T ANALYSIS LAE GROUP #- 5'- : - Lab Sample No. 52541 . • _'t__ T. MCA .5 mm Ooeratcr L c /,

Client Spi. No 25 Filter Area 395 rnrn 2 ( Instrument I D. EM 10 CRY. Gr I D. ~f V C' Disk Mc.

I Screen Magnification 10,400'!. (GO) Area 0.01124 mm": Comments Act. Voltage 80 kV No. GO to be Analyzed 5 4.'_: Struc- ,trsr . '7

I GO. No Coord. Structure Structure Type No. F B C M >,0.5 um < 5 um Length > 5um I.D. of Structure iChrys.1 Amphibole EDS N or,/ (Nonasb. Nonasb. Ambig./ND Ele m ents l /

1r J L~

I

I

I

I

I

I

Phate No. (from 1 in 5 asbestos- Identify all etructurea using EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures Un to 70s/rim (let 4) I Struct. _ > 0.5um & > 5:1 Aspect Ratio <50% undissolve i er, overappe <lo% particulate coverage >50% coverage or o e Totals N= Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Positive diffraction pattern properties conforming <5% holes or o a ue areaa r 0 u m oum to laboratory Identification criteria Unwed portion Far ahrymtile: O.TJnm enaning far (020) raneeuons. of niter OA9nm spacing tar the layer line repeat, atreaktng Chr y so tile of (110) and (190) reflection.. Avoided portion of riltar For amphiboles: 0.53nm layer line repeat. and approx. (2mm aide 3.5 ratio of non-twinned layer line spat spacing to ) Amphibole layer line repeat distance (O53nm(. EDS spectrum conforming to laboratory identification criteria observed. PHIBOLES Ambiguous F= 9ingle Fiber (I-] Intersections = I-9 fibers) observed.&~~Arriclslte B= Bundle (>3 fibers <l fiber diameter apart) 25mm filter Croeidolite Non —asbestos (>3 Intersections) M= Matrixr Stopping Rules: Anthophytlite NSD= No Structure, Detected >50 ./c.0. or to is 4 c.0. Tremolite I Non —identified Ac tinolite L\DATA\PRIVATE\MIEEC\CADD'rEM3 9/22/98

NYC-WTC 000104302