TEM Asbestos air sample data sheet, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7283 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 GRID ID: Accelerating Voltage: 100 KeV Grid Openings: 4 Analysis Date: 3/31/02

Analysis Performed By: MARK PEYSAKHOV

GO, 1 Structure Structure Type Length ID of Structure N or V EDS i--- -- No -05 p (Nonadb F B C M >=5p Chrys Amphibole Nonasb Ambig/NO Elements) No Coord <5p

Struct = > (I 5i. > 5:1 Aspect Ratio Gnd acceptance: ■^= Positive diffraction pattern properties confomiing to <50% undissolved filter, overlapped or folded Totals ^boratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% B C M >5p ■/= EDS spectrun conforming to laboratory holes or opaque areas F identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSO = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467251 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180625