TEM asbestos air sample results, NYC BOE, Jan 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6409 Filter Tvpe / Filter Area: MCE 385 Lab Sample #: 2 Grid Opening Size: G.01,124

Client Sample #: 02 Area Examined: 0.04496 nm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/23/02

Analysis Performed By: MARK PEYSAKHOV

GO. I Structure Structure Type Length ID of Structure N or V EDS i No' (Nonadb F B C >=0.5 u >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord , <5u Elements)

/ 3 -^ 2-

Struct =■ > 0.5p _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% (indissolved 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 >5u /= EDS spectrum conforming to laboratory roles or Qoaque areas _ identificaton criteria observed .Chrysotile At/tPHIBOLES Amphibole F - Single Fiber I Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite - Ambiguous C = Cluster (>3 Intersections’j /Anthophyllite Non-Asbestos i i Tremolite i M = Matrix Non-Identified- Actinolite : NSD = No Structures Detected

CONFIDENTIAL, SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008 CITY_21 MC100_014660205

NYC-WTC_000174773