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): 1928 Lab Group #: 7162 FnterJ[yg£/Filter ATe^ MCE 385 mm* Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm*

GRID BOX: Ma2Pification: 20,000 GRlPn?: Accelerating Voltage: 100 KeV , # Grid Openings: 4 Analysis Date: 3/21/02

Analysis Performed By: MARK PEYSAKHOV

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

v <3^ 3

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V = Positive diffraction pattern properties conforming to <50% undissolued filter, ouertapped 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 >5m t/= 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 i Anthophyllite Non-Asbestos C = Cluster (>3 Intersections) j Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003466968 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180416