TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7347 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 Grid Opening Size: 0.01124

Clientsample#: 05 Area Examined: 0.04496‘ mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M- >=05 M i>=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

ZZZZ^ J

1 Struct = > 0.5.U >5:1 Aspect Ratio Grid acceptance:

9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 untoloed or overlapped grid squares <5% F M j >5u v'= EDS spectrum conforming to laboraton/ holes or opaque areas identification criteria observed Clirysotile AMPHIBOLES Amphibole , ! i F = Single Fiber Amosite Crocidolite Ambiguous 8 = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified j NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470867 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176789