TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6986 Filter Type / Filter Area: MCE 385 Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 03 Area Examined: 0.04496 mm-

GRID BOX: Maonification; 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/8/02

Analysis Performed By: MARX PEYSAKHOV

GO Structure Structure Type Length ID of structure Nor \ EDS ! (Nonadb I No F B C M >=05 M Chrys Amphibole Nonasb Ambig/ND No Coord <5U Elements) '

----------- i ----------- i C- <Y >■

Struct = >0,5p >5:1 Aspect Ratio Grid acceptance:

y= Positive diffraction pattern properties conforming to <50% undissQlved filler, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolced or overlapped grid squares <5% F B C I M I >bu /= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos I rernoiite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468381 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181362