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 #: 6684 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0 01124

Client Sample #: 07 Area Examined: 0.04496 mm-

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

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure ! Structure Type I Length ID of Structure N or V EDS (Nonadb No R B C Ml >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord Elements) I <5|j

V z iL - A

, I

Struct = > 0.5u >5:1 Aspect Ratio 6nd acceptance; V= Positive diffraction pattern properties conforming to <50% undissolved filter, ovedapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C '/= 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 Actinolite I Non-Identified NSD = No Structures Detected I____________

CONFIDENTIAL, CITY_21MC100_003467942 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000181073