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 #: 6986 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124

Ci[cnX Smnpie^ 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification^ 20 000 GRID ID: Accelerating Voltage: 100 KeV U Grid Openings: 4 Analysis Date: 3/8/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor EDE ) >=05 p ’ : (Nonadb I No F B C M •=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements) ! <5iu ---------------- 1 i -------------- 1

I Struct = > 0.5pi >5:1 Aspect Ratio Grid acceptance:

9= Positive Qiffraction pattern properties conforming to <50% undissolved filter, overlapped or folded laboratory identification criteria observed <10% particulate coverage >50% coverage ate

■/= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% f holes or opaque areas 1. ftb c M ' i..

Identification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 liber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite I Non-Asbestos Tremolite M = Matrix Actinolite j Non-Identified NSD - No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468384 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181364