TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6685 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 08 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 4 EDS (Nonadb No F B C M >=05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5u Elements)

I 2 L '7 2 u

Struct = > 0 5p >5:1 Aspect Ratio Grid acceptance: ^^'= Positive diffraction pattern properties confonning to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% partiGulale coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m ■/= EDS spectrum conforming to laboratory 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 Inteisections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003433710 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175909