TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: m’C BOE Volume filters): 1818 Lab Group #: 6823 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm‘

GRID BOX: Magnification: 20,000 GRIDID: CCZzH Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/25/02

Analysis Performed By: • Top / n ROMAN PEYSAKHOV

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

uY

3 7 97

77 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 '/= 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 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified j Actinolite NSD = No Structures Detected

CITY_21MC100_003103480

NYC-WTC_000183906