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 Operator 62205 Filter Type MCE 25 mm Lab Sample No. Filter Area 385 mm2 Client Spl. No. 32 Disk No. Instrument I.D. EM 10 CRX Grid I.D. 4 '] 0.01124 mm^2 Comments Screen Magnification 16,400X (GO) Area 6 4.721 Struct. Corspd. to 7C s Acc. Voltage 80 kV No. GO to be Analyzed

Length I.D. of Structure N or,/ EDS GO. Structure structure Type (Nonasb. No Coord. No. F B C M >. 5um Chrys. Amphibole Nonasb. Ambig./ND Elements ~ <~5 m I / J ~T~ / fi r

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I I I II __ `Photo No. from 1 in 5 asbestos- containing samples) StrucL = > 0.5um & > 5:1 Aspect Ratio identify all structures using BUS [Grid sccept.anoe:I <50x undissoly Check diffraction for asbestos

tar, structures up to 70s illm (1st 4) overlapped or fold <10% particulate coverage >50% coverage Observed (SOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares Store all uarepeated spectra -

Totals

5um ✓N- Not <5% holes or opaque area. on pattern criteria es Patties diffr i ent ing Unused portion In Laboratory identification artteria observed. of nitar Chrysotile (020) nnaeUona. For chrysotils: a.79nm spacing ter repeat, 0,rwlnm spoelog for the Iaper as streakfos Avoided portion of (110) and (130) reflections. of niter and appros. Portion of nitor (2mm else) For ampblbala: 0.5~am'aFer uaa repot. a mina b Amphibole 9.5 ntia of non-Minced to line spot spacing to esaminaUan toyer line repot distance ( .5.1lie). 60s spectrum conforming to laboratory pMpHIBOLES Ambiguous identification criteria observed.

I Amosite P= Single Fiber (1-3 intersections = l-3 fibers) Non —asbestos B= Bundle (>O fibers <1 fiber diameter apart) 25mm n11.r Crocidolite C= Cluster (>O intersections) Stoppieg gala.: Anthophyllite K= Matrix 5o a/c.o. er m tat a c.o. >30 Tremolite Non —Identified NSD= No Structures Detected Actinolite

NYC-WTC 000104215