NYC-WTC_000212088

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters’!: 1816 Lab Group #: 7385 Filter Type / Filter Area: MCE 385 mm^ Grid Opening Size: 0.01124 Lab Sample #: 17 Area Examined: 0.04496 mm^ Client Sample #: 20 Magnification: 20,000 GRID BOX: GRID ID: 3^ Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/11/02 Analysis Performed By: /

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N dr 'J EDS (Nonadb No F B C M >=05 p :>=5p Chrys Amphibole Nonasb AmbigyND <5p Elements)

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Struct = > O.Sg >5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped 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 >5|j EDS spectrum conforming to laboratoiy holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 8 = 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_21MC100_002866085

NYC-WTC_000212088