TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1928 Lab Group #: 7274 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size; 0.01124 Client Sample #: Area Examined: 0.04496 mm^

GRID BOX - Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/30/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure NorN EDS (Nonadb No F B C M >=05 M >=5p Chrys Amphibole Nonasb AmbigyND Io Coord <5p Elements)

-4-

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Vi Positive diffraction pattern properties conforming to '50% Totals laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5m EDS spectrum confonning to laboratory holes or opaque areas Identitication critena 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 Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467216 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180596