TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6S52 Filter Tvpe / Filter Area: .MCE 3-85 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 9 Area Examined: 0,04496 mm'

GRID BOX: Magnification: 20.000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 ■Analysis Date: 2/28,02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb F B C >=G5 p Chrys Amphibole Nonasb Ambig/ND No Coord <6p Elements)

(3 MS C' V P:-

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

9= 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% i F B C I M I >5u G EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Clirysotile AMPHIBOLES 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_0 03468205 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181250