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 1 LAB GROUP #: 5762 - 10/25/0. Operator Filter Type MCE 25 mm Lab Sample No. 62256 Filter Area 385 mm^2 Client Spl. No. 42 Disk No. Grid I.D. Instrument I.D. EM 10 CRX GO) Area 0.01124 mm" 2 Comments I Screen Magnification 16,400X 6 ( 4.721 Struct Corspd. to 70 s~mm No. GO to be Analyzed Acc. Voltage 80 kV

structure Type Length I.D. of Structure Nor,/EDS (Nonasb. G0. Structure Element ><0 5um Chr s. Amphibole Nonasb. Ambig./ND No Coord. No• F H C M < 5 umM 3

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11 unreelsled spectra J Identif Y d! ■t structures w in EDS Check diffraction for asbestos 1 Photo No. (from 1 in S asbastas- structur~W7 (LL 4) containing samples) Grid acceptance: Ratio SOZundisaolve r, over ap Tot Struct. = 0.5um & > 5:1 Aspect <lD% particulate coverage >50% areasdappe gr nfolded or q N= Not Observed (BDB spectrum ar diffraction pattern) l l ue Positive diffraction pattern properties conforming Unused portion criteria observed. to laboratory Identification of filter Chrysotile For ebryesUle: 0.70am •peaind for (050) renseUon., the Iayer lIns repeat. streaking Avo/dad portion 0.63m spacing for or filter of (110) and (f an) rstleeuo:w Per .mphlbola: O.OSam layer Unit repeal. and approx. PorUoa of filter subisct tion of to (Emm side) Amphibole .5 raUo of non-twinned la line s pot spacing to ssamination layer line repast distanes ( .53cm). Ambiguous conforming to laboratory AMPHIBOLES V ' 60S spectrum criteria observed.

I Iden Ication Fv Single Fiber (1-3 Intersections B= Bundle (>5 fibers <1 fiber C Cluster Y= eLria (» intersections) - 1-3 fibers) diameter ■part) 26mm flltar Slappina Rul.s: >50 ■/C.O. or In lot 4 C.O. Arnosite Crocidolite Anthophyllite Tremolite Non —asbestos

'Vnn_Identified

NYC-WTC 000104133