TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 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 # Grid Openings: 4 Analysis Date: 4/1/02

Analysis Performed By: ________ ____________ TZP ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 9 EDS No (Nonadb F B C >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

9^ rzs: ? V -Z. iX—

z ____

9A'

Struct = > 0.5p > 5:1 .Aspect Ratio Grid acceptance:

\' = Positive diffraction pattern properties conforming to <50% jndissolved 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 I M ! >5p V= EDS soectrum conforming to laboratory holes or opaque areas identification criteria observed Chiysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified j Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3 47O'7 62

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176721