TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N YC BOE Volume (liters): 1840 Lab Group #: Filter Type / Filter Area: MCE 385 mm- l ab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm- GRID BOX: <g- Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/18/02

Analysis Performed By: MARK PEYSAKHOV

GO, Structure | Structure Type Length ID of Structure N or v' EDS I (Nonaob No I F B C M >=05 M >==5tJ Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements)

_ -3

i _LJ Struct == > 0.5u > 5:1 Aspect Ratio Gnd acceptance:

v= Positive diffraction paRern prooerties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratcry identification criteria observed least 20 unfolded or overlapped grid squares <5% " F B ' C I \! \ = ECS spectrum conforming io laboratory holes or opaque areas L idertificalion criteria obse,'ved Chrysotile i AMPHIBOLES ■Amphibole ' \ \ ' F = Single Fiber Amosite 5 < Suncle i<3 fibers <1 fiber diameter apart Crocidolite ■Ambiguous C = Cluster i>3 Intersections; Anthophyllite j Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified MSD = \o Structures Detected

CONFIDENTIAL, CITY_21MC100_003471131 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176967