TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6832 Filter Type / Filter Area: MCE 3S5 mm- Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/26/02

Analysis Performed By: J/ ROMAN'PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No >=05 p (Nonadb F B C M >=5)j Chrys Amphibole Nonasb Ambig/ND Elements) j No .Coord <5p ----------------------- 1 I

-I J

X I

Struct = > 0 5p > 5:1 Aspect Ratio Grid acceptance: Positve diffraction pattern properties conforming to *50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 Unfolded or overlapped grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O8294

NYC-WTC_000185676