TEM Asbestos air sample results, NYC SCA, Oct 2001

NYC 9/11 Public Portal Document

TEMAsbestosfair) Count Sheet Client Name: NYC SCA Volume (liters): 1936 Lab Group #: 5801 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm- GRID BOX: . Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: fviA/zZ ROMAl^EYSAKHOV ,

GO. Structure Structure Type Length ID-of Stnjcture N or EDS No >=05 u (Nonadb ' .F 3 C M Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5u .>5:1 Aspect Ratio Grid acceptance: 'J- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria obsenred <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u '1= EDS spectrum conforming to laboratory holes or opaque areas' identification criteria observed Chrysotile I AMPHIBOLY Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite . M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003100043

NYC-WTC_000182626