TEM Asbestos air sample results, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 8759 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: 8/25/02

Analysis Perlormed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or N EDS No (Nonadb F B C M >=05 (J >=5iJ Chrys Amphibole Nonasb AmbigZNQ ' No Coord <5m Elements)

fH 2 II'

Struct = > 0 5p >5 1 Aspect Ratio Gnd acceptance Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification critena observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped gnd squares <5% F B C M >5|j i/= EDS spectrum conforming to laboratory holes or opaque areas identificaton cnteria 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 = Matra Non-Identified Actinolite NSC = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003431305

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175510