Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS Aa GROUP 8: 5' 0 9 - _ ' :26 0.

Lab Sample No. x252'_ Filter re MCE _5 mm Operator ( 'L

Client Spl. No. 1 Filter Area 385 mm"2

Instrument I.D. EM 10 CRX Grid I.D. Y C Disk No.

Screen Magnification 15,400X (GO) Area 0.01124 mm"2 Comments Acc. Voltage 80 kI No. (30 to be Analyzed 5 4.?21 Strict. 2orsod. t. s mm"]

GO Structure Structure Type Length I.D. of Structure EDS N or s/ >,0.5 um (Nonasb. No Coord. No. F B C M < 5 um iChrvs) Amphibole Nonasb. Ambig./NDI Elements)

~ I hoto No. (tram 1 in 5 asbestos- Identify all structures uein EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures uo to 70s slim (let 4) Struct. _ > 0.5um & > 5:1 Aspect Ratio <50% undiesolve i er. overappe or o e <10% particulate coverage >50% coverage Totals Na Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares <5% holes or opaque areas r 0 L >1 . - .7Urn Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused portion For chrysouie 0,73nm ■paemg for (020) reflections, of filter Chrysotile 0.53nm spacing for the layer line repeat. streaking y or (110) and (190) reflections. Avoided porUoa or niter For ampbibeiea: 0.53nm layer line repeat. and apprea. Portion of filter (2mm wide 9.5 ratio or non-ginned layer line spot spacing to mb)ect la examination ) Amphibole layer line repeat distance (0.59nm(. EDS spectrum conforming to laboratory identification criteria observed. AMPHh Ambiguous F. Single Fiber (1-9 Intersections a t-D fibers) Amoslte 9= Bundle (>D fibers <1 fiber diameter apart) Cluster (>9 intersections) 29mm filter Crocidollte Non —asbestos ~~ Stopping am, i l ! Anthophyllite M= NSD= Na Structures Detected >90 ./c.0. or in lot 4 C.D. I Tremalite Actinolite Non —Identified L\DATA\P1UVATE\Mit01o\CADOVEMO 9/22/0a

NYC-WTC 000104284