TEM Asbestos air sample results, BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: BOE Volume (liters): 1928 Lab Group #: 5868 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 4 Grid Opening Size: 0.01124

Client Sample #: 4 Area Examined: 0.04496 mnE

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/10/01

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or n/ EDS (Nonadb No F B C M >=05 p >=5iJ Ch^s Amphibole Nonasb Ambig/ND No Coord <5p Elements)

i . 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 >5|j ^= 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 Actinolite NSD = No Structures Detected

CITY_21MC100_0 03106269

NYC-WTC_000185243