Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5761 - 10/25/01

Lab Sample No. 62203 Filter Type MCE 25 mm Operator

Client Spl. No. 30 Filter Area 3,25 ~mm 2

Instrument I.D. EM 10 CRX Grid I.D. /" _ lr/ Disk No.

Screen Magnification 16.400X (GO) Area 0.01124 mm-2 Comments

Acc. Voltage 80 kV No. GO to be Analyzed 6 1 4.721 Struct. Corspd. to 70 s/^

Length I.D. of Structure N ori/ EDS G0. Structure structure Type (Nonasb. No Coord. No. F H C M 05 m 5um Nonasb. Arabia./ND Elements) a .Uu.. > Chrvs. Amphibole

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Photo No. from 1 in 5 asbestos- Identify all atru~~ctures~~usin SOS Check diffraction for asbestos containing samples) ~otance:I GridGrid ae ytructures up to 70e/term (let 4) <50% uidi.iolved undissolved filte r, overlapped or folded StrueL = > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ne Not Observed (SOSspectrum or diffraction pattern) at least 20 unfolded or overlapped grid square. 1<5Z holes or opaque areas B C /= Positive diffraction pattern properties conforming to laboratory identification criteria Unused Perugia For chryenwe: o.73nm spacing for (ego) refection. of niter Chrysotile 0.03nm spacing for the layer line =post. streaking Avoided potties or (110) and (130) non ctlaim or filter For amphiboles: 0.53am layer Una repast. and approx. (2mm wide) Amphibole 3.5 ratio of non-twinned Isyer line spot spacing to layer line repast distance (0.50om). t/ 6D5 spectrum conforming to Laboratory identification criteria observed. PHIBOLES Ambiguous observed.a7Arnoaite F= Single Fiber (1-3 intersections o 1-3 fibers) Do Bundle (>3 fibers <i fiber diameter apart) 25mm filter Crocidolite Non —asbestos C= Cluster (>3 intersections) Stopping Bular. Anthophyllite Matrix 11= NSD= No structure. Detected >so a/0.0. or in lot 4 0.0. Tremolite Actinolite Non—identified ,. .,._., ~..,..........,,__. _.,.,, _..._ .,.,., ~,,.,

NYC-WTC 000104213