NYC-WTC_000200947

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCBOE Volume (liters'): 1840 Lab Group #: 7766 Filter Tvpe / Filter Area: MCE 385 mm’ Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 GRID BOX: Magnification: . 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure' N or 7 EDS (Nonadb No F B C M >=B5 p ■=5iJ Chrys Amphibole Nonasb Ambig/ND No Cool’d <5p Elements)

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Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: Positive diffraction patle.rn properties conforming to <50% undissolved filter, overlapped or folded Totah laboratory identification criteria observec <10% particulate coverage >50% coverage ate

7= EPS spectrum conforming to laboratory leas; 20 unfolded or overlappec grid squares <5% F B C I M >5u holes ar opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fibe' Amosite B = Bundle f<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite i Non-Asbestos T remolite M = Matrix I Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_011275293

NYC-WTC_000200952