NYC-WTC_000230298

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6609 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: ■ 100 KeV # Grid Openings: 4 Analysis Date: 2/9/02

Analysis Performed By: MARK PEYSAKHOV

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

a, 3^

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptarice: Positive diffraction pattern properties conforming to '50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% patijculale coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M EDS spectrum conformitrg to laboratory holes or opaque areas identification criteria obsenred Chrysotile ; amphiboles ‘ Amphibole F = Single Fiber i Amosite 1 B = Bundle (<3 fibers <1 fiber diameter apart ' Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite i M = Matrix Non-Identified Actinolite i NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO2723158

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230298