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): 1840 Lab Group #: 6462 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0,01124

Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/27/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Stnjcture N or N EDS ! (Nonadb [ No F B C M >=05 u >=5fj etirys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

Y /Z /Z

I T

Struct = > 0.5p .>5:1 Aspect Ratio Grid acceptance:

^/= Positive diffraction pattern properties conforming to <50% undissolved lilter, overiapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification oritena observed least 20 unfolded or overiapped grid squares <5% F B C M EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile : AMPHIBOLES I 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 NSD = No Structures Detected Actinolite Non-Identified M

CONFIDENTIAL, CITY_21MC100_003467552 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180800