TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7218 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/26/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >-05 p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

'■— 3 J.

Struct = > 0 5m 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate . laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5u 'J- EDS spectrum conforming to laboratory holes or opaque areas identification cnterla'observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amosite i B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ; Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468770 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181653