TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8108 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/15/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS No (Nonadb F B C M >=05 p >=5tJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

LT

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction partem properties conforming to <50% undissoNed 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 >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite S = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Defected

CONFIDENTIAL, subject to protective order „o. 2, SEPT. 1558 NYC-WTC_OOO179746