NYC-WTC_000230386

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1928 Lab Group #: 7204 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Pate: 3/25/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type ■ Length ID of Structure Norv EDS No >=05 u (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements)

.ZW —U__

V'2'

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ’/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlepped 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 EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES , Amphibole F = Single Fiber : Amosite ■ I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) ) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NED = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3389189 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230386