NYC-WTC_000229916

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1864 Lab Group #: 8038 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 19 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/10/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS No (Nonadtj F B C M >=05 p >=5p Ctirys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: '/= 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 >5m '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsenred Chrysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite I 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388486 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229916