TEM air sample data sheet, Sample 7, Mar 7 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 6978 Filter Type / Filter Area: MCE 385 mm" Lab Sample 7 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm" GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/7/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Norr EDS (Nonadb No F B C M >=05 M >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements) 7~ 2^

- -

i i i—r

1_________________________ Struct = > 0 5L. >5:1 Aspect Ratio Gnd acceptance; '/= 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 unfolded or overlapped grid squares <5% F B C ' M I >5(j '/= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole ) F = Single Fiber Amosite Ambiguous I B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix i Non-Identified Actinolite NSO = No Structures Detected

CITY_21MC100_0 03102353 NYC-WTC_000183259