NYC-WTC_000207316

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name- NYC BOE' Volume (liters): 1920. : Lab Group #: • 7961 Filter Type / Filter Area: MCE 385 mnr Lab Sample #: 1.1 Grid Opening Size: 0.01124 Client Sample #: 11 , Area Exairiined: 0.04496 GRID BOX: Magnification: 20,000; GRID ID: ^2^2^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/4/02 ■ '

Analysis Performed By: ■ MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorV EDS No (Nonadb F B C M >=05 p •=5p. Chrys - Amphibole Nonasb Amfaig/ND No Coord <5p Elements)

Struct = > 0.5(j > 5:1 Aspect Ratio Grid acceptance: t/= Positive diffraction pattern properti'es conforming to <50% undissolved filter, overlapped or folded Totals laboratory identifica’tion criteria observed <10% particulate coverage >50% coverage ate . least 20 unfolded or overiapped grid squares.<5% F B C M >5p i EDS spectrum confonning 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_OO3O14983

NYC-WTC_000207316