TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters'): 1840 Lab Group #: 7334 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm^ GRID BOX:___ __ Magnification: -20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

Analysis Performed By: MARK PEYSAKHOV

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

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffracton pattern properties conforming to "50% undissolved niter, overlapped or folded Totals laboratory identification criteria observed I •• L. * > 1 A Ar* z\r*«, <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C : M >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identitied NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470848 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176776