NYC-WTC_000201835

NYC 9/11 Public Portal Document

fEM Asbestos (air) CouHt Sheet Client Name: NYC BOE Volume (liters'): 1976 Lab Group #: 6911 ‘ Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04): : Area Examined: 0.04496 nim’ GRID BOX: Magnification: 20 000 " GRJt) ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/4/02

Analysis Performed By: MARK PEYSAKHOV

GO,. Structure: Structure Type ■ Length :] ID of structure - N or V EDS . (Npnadb No c B- C M >=05 p >=5iJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

- 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or foded Totals i laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% Fi B C M >5iJ V : y= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed : Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Eundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix N on-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003269226

NYC-WTC_000201835