Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #: 5761 - 10/25/01 Filter Type MCE 25 mm Operator Lab Sample No. 62195

Filter Area 85 mm 2 Client ent. No. 22 Disk No. Instrument I.D.0 EM 10 CRX Grid I.D. 0.0112¢ mm 2 Comments Screen Magnification 16.400X (GO) Area No. GO to be Analyzed 6 ( 4.721 Struct. Corsrd. to 70 s m:

I Acc. Voltage

GO. 80 kV

Structure Stuctu re Type r Length I.D. of Structure N or . / EDS J (Nonasb. 30.v5 ram >, Sum Ambig./ND Elements No Coord. No. F B C M Chrys. Amphibole Nonasb.

I

Identify all structures win EDS Chi Photo No. (from 1 in 5 asbestos- (let 4) containing samples) Gri acceptance: sir

Struct. = > 0.5um k > 5:1 Aspect Ratio <50% undissolve r, o <10% particulate coverage >50% coverage Totals N= Not Observed (BDS spectrum or diffraction pattern) at leant 20 unfolded or overlapped grid squares <5% holes or opaque arena ✓= positive diffraction pattern properties conforming to laboratory identification criteria observed. cowed portion of filter Chrysotile Por chrysoUlr. 0.73nm soscinj for (020) reflections. ■treawas 0.59nm spacing for the layer llna repent. Avoided portion of (110) area (1011) reflections. of filter (2mm wide) For amphibole.: 0.55am layer line repeat. and appros. 3.5 nUo of floe-twinnedUyer lane spot spadng is E Portion of roller eubJacint •sam•Uae P Amphibole layer line repeat distance (0.53nm). EDS spectrum conforming to laboratory AMPHIBOLES Ambiguous identification criteria observed. AmoBite Pe Single Fiber (1-3 intersections- 1-3 fibers) Be Bundle >3 fibers <1 fiber diameter apart) 25mm tiller Crocidolite Non — asbestos Co Cluster (>3 intersections) stepping Suiea Anthophyllite roe Matrix >5o a/c.o. or in net s c.o. Tremolite NSD= No Structures Detected Anti nolite Non —Identified NYC-WTC 000104205