NYC-WTC_000230004

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 7149 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 8 Area Examined: 0.04496 mm^

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

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or EDS No (Nonsdb F B C M >=05 u i>=5iJ Chrys Amphibole Nonasb Ambig/NO No Coord <5u Elements)

.7ZTZEL _JL_

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: >1= Positive diffraction pattern properties conforming to <50% undissolveti filter, overlapped or folded Tot^ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u 'J= 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 I Crocidolite Ambiguous i Anthophyllite C = Cluster (>3 Infersecbons) Non-Asbestos M = Matrix T remolite Actinolite Non-Identified NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388605 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230004