Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAS GROUP #r 5160 - 1 , 1 26%O1

Lab Sampia Nr. 5253' Filer Type MCE _5 mm Operator

Client Sp1. Plo. 31 Filter Area '°S mm"2

Instrument I.D EM 1G CRX Grid I.D. Disk No

Screen Magnificati.on 10,400X (GOI Area C 21 24 mrn^'

Acc. voltage 80 kv No. GO to be Analviced 4 '21 Strucc Ccrsod c '^ a mm

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

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Photo No. (from 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra containing samples) Grid acceptance: structures u to 70e nim (let 4) <50% undissolve i Cr. over appe or o e Strucc. _ > 0.5um & > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals N= Not Observed (EDS spectrum or diffraction pattern) aL least 20 unfolded or overlapped grid squares <5% holes or opaque areas 1' t3 C M Positive diffraction pattern properties conforming 7 L to laboratory identification criteriaobserved. For chrysoUle•. 0.70nm spacing for (020) reflections. 0.53nm spesiag for the layer line -peat streaking Unused peruse of filter Avo:d.d portico Chryso tile of (110) and (100) reflection. of tiller Par amphibole.: 0.03nm layer line -peat. sod apples. Portion of filter (2mm aide Os ratio of non-twinned layer line spot spacing to subject to ) Amphibole eumm Won layer line repeat distance (OSSnm). 111 Ii EDS spectrum conforming to laboratory identification criteria observed. P= Single Fiber (1-3 intersection. = 1-3 flbe-) B= Bundle (>3 fibers <1 fiber diameter apart) 20mm filter AMPHIBOLES Amosite Croetdolite Ambiguous

I Non —asbestos C= Cluster (>3 Intersection.) Stopping Rule.: Anthophyllite M= Matria [ >s0 s/c.3. or m lot 4 c.0. Tremoiite NSD= No structures Detested Actinolite Non —Identified L\DATA\PRIVATE\MIKEG\CADO5.TEM3 9/22/98

NYC-WTC 000104298