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 (liters): 1800 Lab Group #: 6686 Filter Type / Filter Area: MCE 385 nW Lab Sample #: 9 Grid Opening Size: 0.01124 Client Sample 12 Area Examined: 0.04496 mnV

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor 2 EDS No (Nonadb F B C M >=06 u >=5|J Chrys Amphibole Nonaso Ambig/ND No Coord <5u Elements)

23

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 I 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 i Ambiguous C = Cluster (>3 Intersections) Anthophyllite j Non-Asbestos Tremolite ) M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003103223

NYC-WTC_000183785