NYC-WTC_000230111

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7216 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 15 Area Examined: 0.04496 rnm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/26/02

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 >=5!J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

-3 ^<5 O'

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: ■7= Positive diffraction pattern properties conforming to undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapoed grid squares <5% F B C M >5p a/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile pAMPHIBOLES Amphibole F = Single Fiber I Amosite B = Bundle (<3 fibem <1 fiber diameter apart I Crocidolite Ambiguous C = Cluster (>3 Intersections! i Anthophyllite I Non-Asbestos M = Matnx Tremolite Actinolite ' Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388757

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230111