TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (titers): 1920 Lab Group #: 6732 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 . Grid Opening Size: 0.01124 Client Sample #: 05 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: ■57^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/19/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure ' Structure Type Length ID of Structure Nor n EDS (Nonadb No F B C M >=05 p :>=5(J Chrys Amphibole Nonasb Ambig/ND No Coord <5tJ Elements)

I 1a

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: >1-. Positive diffraction pattern properties conforming to <«>% undissolved Alter, overlapped or folded Totals 10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B I C M >5u a/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C - Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite i Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468020 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181133