TEM Asbestos bulk sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1704 Lab Group #: 7376 Filter Type / Filter .Area: MCE 385 mnV Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 09 Area Examined: 0.0562 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 5 Analysis Date: 4/10/02

Analysis Performed By: MARK PEYSAKHOV

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

S' /-V

Struct = > 0.5p >5:1 .Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria cbsereed <10% particulats 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 Clirysotile I AMPHIBOLES Amphibole F = Single Fiber Amosite 3 = Buncle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) , Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-ldentified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_0 09505366 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000178869