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): 1816 Lab Group #: 7459 Filter Type / Filter Area: MCE 385 mnV Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 12 Area Examined: 0.04496 i-iiti-

GRID BOX: Magnification: 20,000 GRID ID: A Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/18/02

Analysis Performed By; MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure NorN EDS (Nonadb No F B C M >=05 u >=51J Chrys Amphiboie Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5n > 5:1 Aspect Ratio Grid 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 gnd squares <5% T B C M >5p v'= EOS spectrum conforming to laboratory holes or opaque areas I I F identification criteria observed Chrysotile ----------------------- 1----- .AMPHIBOLES Amphibole | F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos T remolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detected

CITY_21MC100_003101896

NYC-WTC_000182952