NYC-WTC_000230328

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters'): 1920 Lab Group #: 6673 Filter Type / Filter Area: MCE 3S5 Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm-

GRID BOX: Ma2nilication: 20.,000 ■ GRID ID: . Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/14/02

Analysis Performed By: MARK PEYSAKHOV

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

A/—

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: t/= Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped 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 >5u t/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observeo Chrysotile AMPHIBOLBS Amphibole F = Single Fiber Amosite 6 = Bundle (<3 fibers <1. fiber diameter apart Crocidolite Ambiguous • C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Delected

CONFIDENTIAL, CITY_21MC100_003389073 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230328