NYC-WTC_000228920

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 7750 Filter Type / Filter Area; MCE 385 mm" Lab Sample #: 2 Grid Opening Size: 0,01124 Client Sample #: 04 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date; 5/15/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nory EOS (Honadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb An*ig/ND No Coord <5|J Eteraents) T

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Struct->0,5n > 5:1 Aspect Ratio Grid acceptance: i/= PosWve diffraction pattern properties conforming to <50% undisaolved Alter, overtapped or folded Totals laboratory identificaton criteria observed <10% partiojiate coverage >50% coverage ate least 20 unfolded or oveilapped grid squares <5% F B C M >5m ■ 'I-EDS spectrum conforming to laboratoty holes Of opaque areas identificatior 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 NSO = No Structures Detected

CITY_21MC100_002901899

NYC-WTC_000228920