NYC-WTC_000230408

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 Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 15 Area Examined: 0:04496 mm^

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 N EDS No >=05 p (Nonadb F B C Chrys Amphibole Nonasb Ambig/ND Elements) No . Coord <Sp

.3 O'

Struct > 0.5u >5:1 Aspect Ratio Grid acceptance: 'Z = 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 overlapped grid squares <5% F B C M >5u a/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole r = Single Fiber Amosite B = Bundle [<3 fibers <1 fiber diameter apart Crocidalite Ambiguous C = Cluster (>3 Intersections) i Anthophyllite i Non-Asbestos Tremolite - 'M = Matrix Non-ldentified Actinolite ' NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_00 2723188

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230408