TEM Asbestos air sample results, NYC BOE, Jun 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 8136 Filter Type / Filter Area: MCE 385 mm’ Lab Sanntple #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm’ GRID BOX: Magnification: 20 000 GRIDID: J Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 6/17/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS No (Nonadb F B C M >=05 M :>=5|J Chrys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

— J? .—

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to und^Ned filter, overtap^ 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 >5u 7- 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 Cribcidolite I Ambiguous C = Cluster (>3 Intersections) ZVithophyllite Non-Asbestos T remolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_2IMCI00_003461609 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179785