NYC-WTC_000228482

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet CHent Name: NYC BOE V'olume niters): 1^20 ______ Lab Group #; 7346 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Saoiple #; 07 Area Examined: 0.04496 mm'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory EDS (Nonadb No F e C M >=05 p :>=5p Chrys Amphibole Nonasb Ambig/NC No Coord <5p Elements)

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: >/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Tot^ laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or oveifapped grid squares <5% B i C EDS spectrum conforming to laboratory holes or opaque areas _______ P M identification criteria observed Chrysotile I AMPHIBOLES Amphibole j F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Malnx Actinolite Non-Identified NSO = No Structures Detected

CITY_21MC100_002900726

NYC-WTC_000228482