TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE VolumejJIitersL 1920 Lab Group #: 6852 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 Grid Opening Size: 0 01124 Client Sample #: 12 Area Examined: 0.04496 mm- GRID BOX: X Magnillcation: 20.000 GRID ID: IT 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 v EDS No >=05 u (NonadD F B C M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5tJ Clements)

Struct = > 0.5)1 >'5:1 Aspect Ratio Grid acceptance: \/= 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% r P >5u v'= EDS spectrum conforming to laborator/ C M holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite . Noil-Asbestos Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003468208 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181252