NYC-WTC_000207783

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: - NYC BOE Volume (liters): 1827 Lab Group #: 7753 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 15 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/16/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Structure N or N EDS (Nonadb No F B C M ^*-05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

6-

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ■/= Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded T otals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M ■ 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 T remolite M = Matrix Non-Identified Actinolite NSD No Structures Detected

CITY_21MC100_003016514

NYC-WTC_000207797