NYC-WTC_000207391

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 8022 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 5 . ■ Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: .0.04496 mm^

GRID BOX: Magnification: 20,000 ■ GRID ID: Accelerating Voltage: too KeV # GridOpenings: 4 AnaIvsis.Date: 6/9/02; ■■

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length , ID of Structure Norv EDS ■ No (Nonadb’ F B C ■ >=05 p >=5m. Chrys Amphibole Nonasb Ambig/ND No Coord <5u . Elements)

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Struct = > 0.5|j > 5:1 Aspect Ratio Grid acceptance: a/= Positive diffraction pattern properties conforming to undssolved filter, overiapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F B C M >5m ■ V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed . Chrysotile AMPHIBOLES 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_21MC1OO_OO3O15116

NYC-WTC_000207391