TEM air sample results, 125 Liberty St, Oct 2002

NYC 9/11 Public Portal Document

TEM Asbesfos(air) Count Sheet Client Name: ATC Volume (liters): 3600 Lab Group #: 9041 Filter Type / Filter Area: MCE 385 mm' Lab Sample #: 20 Grid Opening Size: 0.01124 Client Sample #: 23 Area Examined: 0.24728 mm' GRID BOX: /L!7 Magnification: 20,000 GRID ID: a

Accelerating Voltage: 100 KeV # Grid Openings: 22 Analysis Date: 10/30/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonasb F B C M >05 P >=5p ChryS Amphibole Nonasb Ambig/ND . No Coord <5P Elements) --- V — -t--

- Z 1/

• 2_ 31--3 ai J z— j5--3 It;' q2 V

c IS z. - . — / oS 2s

( Z -1 1—

L/

1 N Photo No.(from in 5 asbestos contalnuic samo es . .,. _ L— 3 / Struct = > 0.5yu > 5:1 Aspect Ratio <50% undissolved filter, overlapped or folded Totals v Positive diffraction pattern properties conforming to <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% >5u holes or opaque areas v= EDS spectrum conforming to laboratory Chrysotile • identification crttena observed F = Single Fiber B = Bundle (<3 fibers <1 fiber diameter apart AMPHIBOLES Amosite Crocidolite Amphibole. Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix on-identified Actinolite NSD = No Structures Detected __ .. _..._.-..

NYC-WTC 000131520