Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP # 5761 - 10/25/01 Operator ■ Filter Type MCE 25 mm 62177 Lab Sample No. Filter Area 385 mm-2 Disk No. Client Spl. No. 04 Grid I.D. 10 CRX Comments Instr ument I.D. EM 0.011 (GO) Area 4.721 Strucl Cors d. to 70 s/mm"2

1 Screen Magnification 16 400X

Acc. Voltage 80 kV

Structure Type Length No. GO to be Analyzed 6

I.D. of Structure N °r✓ EDS (Nonasb. Ambig./ND Elements GO. Structure 30.5 um 3 Sum Chr s. Am hibole Nonasb. No Coord. No. F B C M < 5 um

2 2 ~ Z /

5 ~I

I I I I 1 I 1 .peetn ubestos store ail un=Led 6D5 Check diffraction for asbe.tos— identify ail structures usln structures u w 90s iptm (let 4) `Photo No. from 1samples) la 5 Grid acceptance: or ° e To a~s r, over app containing <50Ai uadisaolve coverage >50% coverage 5:1 Aspect Ratio <10X particulate grid quares Stzuct = > O.5um k > diffraction pattern) at least 20 unfolded or overlapped N. Not Observed (EDS spectrum or <5% holes or o ■ ua anus conforming Unused portion Positive diffraction pattern prspertias of idler Cl]f'y9°tile to laboratory identification criteria observed. )4inuctioflL ofofded portion obrysoLLlr. 0.77am .eating ry tnakU g Per for the layer in. of filler 0.69nm .Patin reflections. porifea of niter (Panm wide) Amphibole of (into) and (170) layer tine repeat. and apprea eubJeat to For ratio no o.57nm spot spacing •:amfaatiac 3.5 ratio of past 41.15nce (0.6snm). Ambiguous tine repast s to laboratory ~S AMPH[BO ids s tram siteria observed. Amosite identi icaUon criteria Non— agbesto° as >= 1-3a rt) 25in niter Crocidolite >3 (1r s 1 fe Single Fiber P= layer diameter apart) 1 Anthophyllite Bundle (>7 fibers <1 fiber s= StopP ns flutes Tremolite Non —Identified intersections) C= Cluster(>7 eo s/c.O. or in lot NYC-WTC 000104188