Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS El Lab Sample No.

Client Sp: No. 42 62549 LAB GROUP e

F:.---_ 5';? - - - '25i0, Type ' MCE 25 mm

Filter Area 395 mm'2 Operator

Instrument I.C. EM 10 CRX Grid I.D, ' •YL Disk NC

I Screen Magn cation 10,4)0}: 1GOi Area '1 .)1124 mm'_ Comment_ Arc. Voltage 80 kV No. G0 Co be Analyzed - ;.721 grey:- recd '13 s mm':

GO. Structure Structure Type Length I.D. of Structure EDS N or e 1 um (Nonasb. No Coord. No. F B C M 'D'5 < 5 um 3 5utn IChrys.1 Amphibole Nonasb. Ambig./NDI Elements)

6,-- - 2 —✓

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Fj Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra - containing samples) f structures us to 70s t~lm (lot 4) I Struct. _ 0.5um & > 5:1 Aspect Ratio <50% <10% cceptance1 undiseoivii particulate t er. overlapped or of e coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) lat least 20 unfolded or overlapped grid squares <5% boles or opaque areas Positive diffraction pattern properties conforming to laboratory Identification criteria observed. Unused portion For ehrysetilsi 0.79nm spacing for (a20) reflection, of filter Chrysotile 0.53nm spacing for the layer line repeat, streaking Avoided portion of (I10) and (130) raneetiona. of filter For ampbibulm: 3.53nm layer line repeat, and apprca. Portion of filter (2mm side) 3.5 rsua of sari-twinned layer line spat spacing to mbkeet is Amphibole layer line repeat distance (0.53nm). commotion

= EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES g F= Single Fiber (1-3 intersections = 1-3 fibers) Arnoaite 8= Bundle (>3 fibers <1 fiber diameter apart) C= Cluster (>3 intersections) 25mm filter Crocidolite Non —asbestos Sioppin Anthophyllite Matrix NS No Detected ~r >SUr/C.O. or is let 4 C.O. I Tremolite Actinolite Non—identified l.\DATA\PRfYATE\YIK8C\CA30VEa3 9/22/98 1

NYC-WTC 000104307