NYC-WTC_000229759

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 8147 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124

Client Sample #: 5 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/17/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N orN EDS (Nonadb No F B C M I>=5p Chrys Amphibole Nonasb Ambig/NO No I Coord <5u Elements)

Struct = > O.5p .> 5:i Aspect Ratio Grid acceptance: Positive diffraction pattern properries conforming to 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 >5p ■/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES I Amphibole F = Single Fiber Amosite i B = 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_003387888 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229759