TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters’): 1840 Lab Group #: 7230 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: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/27/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or "7 EDS No (Nonadb F- B C M >=05 M :>=5|j Chrys Amphitxjie Nonasb Ambig/ND No .Coord <5p Elements)

Of ii

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate 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 Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite ; B = Bundle (<3 fibers <1 fiber diameter apart ■ Crocidolite i Ambiguous C = Cluster (>3 Intersections) - Anthophyllite ; Non-Asbestos Tremolite - I M = Matrix Actinolite I Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003470603 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176615