NYC-WTC_000229866

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1864 Lab Group #: 7768 Filter Type / Filter Area: MCE 385 Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: 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 EDS No (Nonadb F B C M >=05 u i>=5p Ghrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

2 f ? --------

Struct = >0.5p > 5:1 Aspect Ratio Grid acceptance: 7= Posifive diffraction pattern properties conforming to *5°% undissolved 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 >6y EDS spectrum conlorming 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 NS3 = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388410 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229866