NYC-WTC_000230329

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume fliters): 1928 Lab Group #: 6673 Filter Type / Filter Area: MCE 385 mm-' Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 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 NorV EDS (Nonadb , No F B C M >=06 pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Z

Struct = > 0.5p .>, 5:1 Aspect Ratio Grid acceptance: yl= Positive diffraction pattern properties conforming to "50% undissolved filter, overlapped or folded TotiUs laboratory identification criteria observed ":10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5tJ ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite. - Ambiguous ] Anthophyllite Non-Asbestos C = Cluster (>3 Intersections) Tremolite M = Matrix Acbnolite Non-Identified MED = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389074 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230329