NYC-WTC_000178972

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: HYC BOE Volume niters): 1832 Lab Group #: 7987 Filter Type / Filter Area: MCE 385 Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/6/02

Analysis Performed By; MARK PEYSAKHOV

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

____ _ CT

Struct = > O.Sp > 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 >5|J A- EDS spectrum conforming to laboratory holes or opaque areas identification 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 Tremolite M = Matrix ‘ Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003456517 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178986