TEM Asbestos air sample results, NYC BOE, Jan 24 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 2152 Lab Group #: 6416 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 03 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/24/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 pi Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

f/9- 77W -J__ -JL__

] Struct = > 0.5u .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to ^50% undissolved filter, overlapped or folded Totals laboratory identification critena observed * 10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% C M >5iJ ■/= 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_003433537 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175817