Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAP GROUP 8' 5''7 - 10 26 '01

Lan Sample No, 52535 Fil__r Type MCE 25 mm Qp re:c. _' t'L

Client Spi. No. 21 FLlIer Area 335 mm'= , Inscrumen0. I . D. EM 10 CRf. Grid _.G Di.ak No . _ Screen MagnLiication 16.400X iGO, Area ') 01124 mm Commence Acc. Voirege 80 kV No. GO co cc Anaiyced 4 21 rues _crscd. _ rnn.'

GO. Structure Structure Type Length I.D. of Structure EDS N ori/ I 05 um (Nonasb. No Coord. NO. F B C M < 5 5um Chrysi Amphibole Nonasb. Ambig./ND E1ernents)

it L~

I

I

I

I Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeaLed spectra J containing samples) Grid acceptance: structures u to 709 t~im (let 4) I Struct. = > 0.5um & > 5:1 Aspect Ratio <SOx undiseolve 1 er, over appe or o e <10% particulate coverage >50% coverage Totals N= Not Observed (EDO spectrum or diffraction pattern) at least 20 unfolded or overlapped grid square. <5% holes or opaque areas /= Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unused portion For abryaotil.i 0.T9nm •pacing for (020) reflections, 0.53nm spacing for the layer line repeat. streaking of filter Chrysotile Avoided portion of (110) and (130) reflections. of filter For amphiboles: 0.09nm layer line repeat and approc. Portion of filter (2mm vide) 3.3 ratio of non-twinned layer line spat spacing to subject to Amphibole lice repeat dietaaes (0.39nm). siiammatioa

~= EDS spectrum conforming to laboratory identification entena observed. AMPHIBOLES ! Ambiguous layer F. Single Fiber (1-3 Intersections = 1-3 fibers) Amosite B. Bundle (>3 fibers <1 fiber diameter apart! 25m filter Croeidolite Non —asbestos C= Cluster (>3 intersections) Stopping Rules: L_- Anthophyllite Matrix (ISO.NaNo structure+ Detected ~ sD a/G.3. or in l et 4 G.O. Tremalite ~ Non —Identified Actinolite L\DATA\PRlVATE\MiKEG\CADD'EM3 Mn 9/22/98 L

NYC-WTC 000104399