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): 1920 Lab Group #: 6884 Filter Type / Filter Area: MCE 383 mm- Lab Sample #: 6 Grid Opening Size: 0.01124

Client Sample #: 06 Area Examined: 0.04496 rnm-

GRID BOX: Magnification: 20.000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/2/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 4 EDS (Nonadb No F B C M i Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) ’

■3

Struct = > 0.5(1 >5:1 Aspect Ratio Grid acceptance:

y= 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 >5p 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 aparf Crocirdolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Manx Non-Identified Actinolite NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003468242 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181268