NYC-WTC_000206930

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters); 1920 Lab Group #: 7738 Filter Type / Filter Area; MCE 385 mm’ Lab Sample #: 7 Grid Opening Size; 0.01124 •Client Sample #: 7 Area Examined: 0.04496 mm’

GRID BOX: Magnification; 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date; 5/14/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = > 0.5p >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 >5p . 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 I Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003014377

NYC-WTC_000206930