TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 7020 Filter Type / Filter Area: MCE 385 Lab Sample #: 16 Grid Opening Size: 0.01124 Client Sample #: 16 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/10/02

Analysis Performed By: -===^ MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or x/ EDS No (Nonadb F B C M >=05 u i =5h Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

2? 4^-2

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 7= 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 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile .A.'vIPHlBQLES Amphibole i F = Single Fiber Amosite j Ambiguous | B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos j Tremolite M = Matrix I Non-Identified I Actinolite NSD = No Structures Detected

CITY_21MC100_003102438

NYC-WTC_000183306