TEM Asbestos air sample results, NYC BOE, Apr 29 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7574 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0,01124 Client Sample #: 02 Area Examined: 0.04496 mm^ GRID BOX: GRID ID: # Grid Openings: 4 s Magnification: Accelerating Voltage: Analysis Date: 20,000 too KeV 4/29/02

Analysis Performed By: [\/ ROMAN PEYSAKHOV

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

96 n //" {■('

Struct = > 0.5)1 > 5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

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

CONFIDENTIAL, CITY_21MC100_003471356 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000177122