TEM Asbestos air sample results, OTC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: OTC BOE Volume (liters): 1936 Lab Group #: 6671 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Noi^v EDS (Nonadb No F B C M M5m )>=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

c?

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance;

'/= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% FiB C M >5p '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i 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 Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467917 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181053