TEM Asbestos air sample data sheet, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7283 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: J Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: MARK PEYSAKHOV

GO. i Structure i Structure Type Length ID of Structure Nory EDS (Nonadb No Coord j No B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Elements) <5p ,

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Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: A- Positive diffraction pattern properties eonfonning to <50% undissolved filter, overlapped or folded Totals laboratoiy identification criteria observed <10% particulate coverage >50% coverage ale least 20 unfolded or overlapped grid squares <5% F B C M >5m '/= EDS spectrum conforming to laboratory holes or opaque areas identitication 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 M = Matrix Tremolite Actinolite Non-Ideutified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467244 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180618