Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS I LAB GROUP #: 5761 - 10/25/01 Operator i Filter Type MCE 25 mm Lab Sample No. 62181 Filter Area//338/85 mm'2 Client Spl. No. 08 Disk Mn. Grid I.D. 4?9 Instrument I.D. EM 10 CRX Comments (GO) Area 0.01124 mm^2 Screen Magnification 16,400X ( 4 721 Struct. Corspd. to 70 s/mm"2.) No. GO to be Analyzed 6 Ace. Voltage 80 kV

I.D. of (Nonasb. or v' Length Stru~Ambig./ND]j~E No B Chrvsi Amphibole

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a aaaN_____ a aaai______ 7 aaaa______ aaia _ soon___ -

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a aaai_ - J for gybes awro ... .......r----- -.- -- -- Check dIff r Photo No. (tram 1 in 5 aabeatoe- Identify all structures usip EDS structures a ti to for (Is! 4) containing samples) Grid acceptance: <50% and solu

I 5:1 Aspect Ratio particulate coverage >50% coveragesquares Sttvet > 0.5um k > 20 unfolded or overlapped rl HI Sum N. Not observed (EOs spectrum or diffraction pattern) at least F B C <5% holes or _opaque areas positive diffraction tiara parties conforming Unueed portion observed. to laboratory IdenUfleaUon erttarla of filter Chrysotile For stn osUui 0.7anm fer (020) reneetbne. Avafaed paruoa per lee rapist. streaking 0.51am spacing for !La

J of filter of ( Ito) and (lD0) reflaattoos. Portion of niter (zmm vfde) Amphibole For ucd get a~ subject to r~; ° e~eon- >tineed lam PPaarr 11na s t rya l esaminstion layer ling repot distance (0.081). Ambiguous EDS spectrum conforming to laboratory AMPHIBOLES

I IdenUfloaUon criteria observed. F. Single Fiber (1-3 Intersections = 1-3 B= Bundle (>3 fibers <1 fiber C= Cluster (>0 interoctiow) M= Matrix _ diameter fibers) apart) stopplcg galas: 20mm filter

,so ./C.O. or in let t G.O. Amosite Crocidolite Anthophyllite Tremolit e Non —asbestos Non -Identified

NYC-WTC 000104192