TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7146 Filter Type / Filter Area: MCE 385 mm" 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: 3/20/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. .Structure Structure Type Length ID of Stnjcture N or 7 EDS No (Nonadb F B C >=06 p~ >=5(j Chrys Amphibole Nonasb Ambig/ND No • Coord <5p Elements)

V 7T (f

Struct = > O.'Sp > 5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

■/= EDS spectrum conforming to laboratory least 20 unfolded or overtapped grid squares <5% holes or opaque areas F B e M >5|J identification criteria observed Chrysotile i AMPHIBOLES ! Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i Anthophyllite C = Cluster (>3 Intersections) Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470463 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176519