TEM Asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6401 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/22/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type I Length ID of Structure N or EDS I No . (Nonadb j F B C M I ^"^05 P >=5|j Chrys Ampriibote Nonasb Ambig/ND No Coord ! <5p Elements) ;

z.

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance; V= 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 i M I >5p EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile !I I AMPHIBOLES Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) - Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467442 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180727