NYC-WTC_000230044

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1936 Lab Group #: 7185 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 7 Area Examined: 0.04496 mm^

GRID BOX: Magnifieation: 20,000 GRID ID: 7^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/23/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norv EDS (NonaJb No F B C >=05 p )>=5(J Chrys Amphiboie Nonasb Ambig/ND No Coord <5p Elements)

71^ bf ? fk-2. _ k__

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

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenzed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B - Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Inte.'sections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388662 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230044