TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6775 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: EO4 Area Examined: 0.04496 rnm-

GEGD BOX: A' '-'. V.' Magnification: 20.000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/22/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS No (Nonadb i F B C M >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND Elements) | No Coord <5u

_____ -5

Struct = > 0.3(1 > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Tut a Is laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overgpped grid squares <5% F B C M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Cteysotile 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 NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468077 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181168