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): 1920 Lab Group #: 6852 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0 01124

Client Sample #: 1 Area Examined: 0.04496 mm-

GRID BOX: J Magnification: 20.000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 2/28/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or / i vs No ■t—INonadb—i F B C M >=05 |j >=5p Chrys Amphibole Nonasb Ambig/ND No Coord xY <5u Elements)

q 7 .//

Struct = > O.Sp >5:1 Aspect Ratio Grid acceptance:

V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

V= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F I B C M >5p identification criteria observed Chiysotile 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

CONFIDENTIAL, CITY_21MC1OO_OO3 46 819'7

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181242