NYC-WTC_000215687

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6080 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/12/01

Analysis Performed By: MARK PEYSAKHOV

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

3

Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% 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 >5u ^/= 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 Inlersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified ! Actinolite NSD = No Structures Detected

CITY_21MC100_002874019

NYC-WTC_000215699