TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m’C BOE Volume flitersb 1920 Lab Group #: 6052 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalysisDate: 12/6/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or V EDS Mo''-' (NonaPb F B C >=06 M Chrys Amphibole Nonasb Ambig/ND No Coord <5U Elements)

.B

Struct = > 0.5p 5:1 Aspect Ratio Grid acceptance: ^/= Positive 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 i >5p v= 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 I ! M = Matrix NoE-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467387 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180694