NYC-WTC_000229982

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7136 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/19/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonadb F B C M >=05 p Chrys Amphibole Nonasb AmbigiND Elements) No ‘ Coord <5p

' Z-

A

Struct = > 0.5)j _> 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to *5®^ undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

^/= EDS spectrum conforming to laboratory least 20 unfolded oroveriapped grid squares <5% holes or opaque areas F B c M >5p identification criteria 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 M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388568 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229982