NYC-WTC_000230330

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 6673 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 14 Grid Opening Size: 0.01124 Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV ■ # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type .Length ID of Structure NorV EDS (Nonadb No F B C M >=05 p >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p ■ Elements)

a

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properdes conforming to <50% undissolyed filter,,overlapped or folded Total,s m i /J laboratory identificaaon criteria observed <t0% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p •/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous C = Cluster (>3 Intersections) j Anthophyllite Non-Asbestos ; T remolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003389075 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230330