Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TENT ANALYSIS LAB 3F.C'UF - 5 ' _ _ Lab Sample No. ^253n Filter TypeMCE ]r nin Operator Client Spi Nc, 32 F__ter Area 335 min

1 instrument I.D. EM 1 Screen Magnification 16.4003 Arc. Voltage 80 k'l CRY. Grid 2.0 iGO I Area No lJ1 .~C'

) 11124 mm GC to be Analyzed _ Disk No.

Comments i 4.721 Street. Corsod. to 00 s/mm'2

GO. Structure Structure Typel Length I.D. of Structure N or,/ EDS >0.5 um (Nonasb. No Coord- No. F B C M >. 5um Chrys. Amphibole Nonasb. IAmbig./ND E(ements) 5 um

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~ I Photo No. (from 1 in 8 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra - containing samples) l e nce1 structures up to 70s trim (let 4) StrucL = > O.Sum & > 5:1 Aspect Ratio <So% undissolve i er, overappe or o e <10% particulate coverage >50z coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares ✓a Positive diffraction pattern properties conforming <67. holes or opaque areas 0 L !ri 7 JUIZI r to laboratory identification criteria Unused portion Fm ebrywtile: 0.70nm epae:n` for (020) reflections, of filter Chrysotile 0.53nm spacing far the layer line repent. streaking Avoided portion of (110) and (130) reflections. or [liter For amphiboles: 0.53nm layer line repeat, and approa. (2mm wide) 3.5 ratio of non-twinned layer line spat spacing to Amphibole layer line repeat distance (0.53nm). observed.a...m&..u.n EDS spectrum conforming to laboratory Ambi g uous Identification criteria observed. PHIBOLES F= Single Fiber (1-3 intersections a 1-3 fibers) Amosite 8= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter I Crocidolite Non-asbestos C= Cluster (>7 intersections) Stepping Rules: Y= Matrix ~~ Anthophylllte NSDn Na Structures Detected >50 a/C.O. or In let 4 C.D. i ! Tremolite Non —Identified I Actinolite L\DATA\PRIVATE\M1ICdG\G00\TEM3 9/22/98

NYC-WTC 000104297