TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1920 Lab Group #: 6884 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0.04496 mm-

GRID BOX: Maonitlcatipn: 20.000 GRID ID: .Accelerating Voltage: 100 KeV # Grid Openings: 4 .Analysis Date: 3/2/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: -/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Fotaks laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clirysotile 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_21MC100_003468251 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181275