Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

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ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP #: 5762 - 10/25/01 Operator 62238 Filter Type MCE 25 mm Lab Sample No. Filter Area 3 mm ', /Q~ Client Spl. No. 24 ~/~ /-7— Grid I.D. Disk No. Instrument I.D. EM 10 CRX 0.01124 mm2 Comments (GO) Area Screen Magnification 16,400X No. GO to be Analyzed 6 4.721 Struct. Corspd. to 70 s/mm"2 ' Arc. Voltage 80 kV EDS Length I.D. of Structure N ort/ GO. Structure Structure Type (Nonasb. Vo1Coor l No. um Sum Chrys. Amphibole Nonasb. Ambig./ND Elements FIBICIM

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I I Photo No. (from 1 in 5 asbeetoe- Identify all structure- usin SOS Check diffraction for asbestos tltm (lit 4) eated all unrep spectra

1 containing samples) Struct = > O.5um k > 5:1 Aspect Ratio N. Not Observed (SOS spectrum or diffraction Grid auadiaaolve cturei rpoverappe u crtao Oe <10% particulate coverage >50% coverage at least 20 unfolded or overlapped grid aqua pattern)1<5% botee or opaque areas To tais Positive diffraction pattern propartiea conforming ✓ to laboratory identification criteria Uau■ed portion of niter Chrysotile Per ehry.eUlr. 0.730m •peel for (020) ran.ation., ■iraaiting Avoided portion 0.03nm spacing for the payerllns repeat.

I of (110) and (130) reaeotion■. fritter and appro:. mm vide For amphiboles: 0.03am layer~r line ropaaL Amphibole 3.0 ratio of eon-tetnned `yer line -Pot -pacing to 3 om). Layer line repeat distance D. Ambiguous SOS spectrum conforming to Laboratory IPHIBOLES idenuflaatlon criteria ab.erved. observed.&7Atnosite fibers) F= Single Fiber (1-3 intersections = 1-3 05mm filler Crocidolite Non —asbestos B= Bundle (>3 [then <1 fiber diameter apart) C= cluster (>3 intersections) stnpvias swe■: Anthophyllite M. Napa= >00 ./G.o. or to lit t G.Q. Tremolite NSO= No structure. Detected er~;notite Non —Identified NYC-WTC 000104115