TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 8828 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 10 Grid Opening Size: 0.01124 Client Sample #: 10 Area Examined: 0.04496 mm’

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV ■ fi Grid Openings: 4 Analvsi.s Date: 9/10/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS I No >=05 M (Nonadb I F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5(J Elements)

Struci = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved 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 y= EDS spectrum conforming lo laboratory holes or opaque areas idenllficaiion criteria observed Chrysotile A.MPHIBOLES Amphibole F = Single Fiber Amosite B = Bundis (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003422044 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175301