NYC-WTC_000191566

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1920 Lab Group #: 7930 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 17 Area Examined: 0.04496 mnV

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage; 100 KeV # Grid Openings: 4 Analysis Date: 6/1/02 Analysis Performed By: ^7

ROMAN PEYSAKHOV

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

z'l /? If

7V-

Struct = > 0.5u .> 5:l Aspect Ratio Grid acceptance; 'I- Positive diffraction pattern properties conforming to <50% undissolved 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 'J- 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 I Actinolite NSD = No Structures Detected L.

CITY_21MC100_003091366

NYC-WTC_000191566