TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOH Volume (liters): 1920 Lab Group #: 6986 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: -3/8/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length lb of Structure N or N EDS (Nonadb No F B C M >=05 pi Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elemenls)

3

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 obsen/ed <10% particulate coverage >5C% coverage ate least 20 unfolded or overlapped grid squares <5% C I M j >5u \= 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 M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468392 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181369