TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7029 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: 3/11/02

Analysis Performed By: f\j ^75 ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or y EDS (Nonadb No F B C M >=0571 i>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

IH

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

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria obsen/ed least 20 unfolded or overlapped grid squares <5% F B C M >5p V-EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPH1BOLES~1 Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart , Crocidolite Ambiguous C = Cluster (>3 Intersections) ; Anthophyllite Non-Asbestos I T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468468 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181422