TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 5979 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 8 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/28/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or V EDS (Nonatlb No F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

Struct = > 0.5n > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identincation criteria observed <10% particulate coverage >50% coverage ate

^4 EDS spectrum conforming to laboratory least 20 unfolded or overtapped grid squares <5% holes or opaque areas FTB c M >5iJ identification criteria observed Chrvsotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) 1 Anthophyllite ! Non-Asbestos Tremolite j M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC1OO_OO31O6786

NYC-WTC_000185528