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): 1920 Lab Group #: 6703 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: J Grid Opening Size: 0.01124

Client Sample #: 03 Area Examined: 0.04496 mm-

GRID BOX: GRID ID: ..w Magnification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 2/17/02 Analysis Performed By: ______ ^2/^________

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 U >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

/ 2^

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V= 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% F B C M >5|j V= 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 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467978 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181099