NYC-WTC_000212388

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet C lient Name: OTC BOE Volume (liters): 1920 Lab Group #: 7313 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 4 Grid Opening Size: 0.01124 C'lient Sample #: 04 Area Examined: 0.04496 mm" CiRID BOX: Magnification: 20,000 GRID ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date; 4/3/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb AnWNO No Coord <5p Elements)

-•3 --Or.

r r—

Struct = > 0.5p _> 5:1 Aspect Ratio Grid acceptance: '/= Positive diffraction pattern properties conforming to <50% undissohred ffiter, overiapped or folded Totals aboratory identification criteria observed <10% paidculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5m '1= EDS spectnim conforming to laboratory holes or opaque areas dentificalion criteria observed Chrysotile AMPHIBOLES Amphibole F Single Fiber Amosite S - 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_002866326

NYC-WTC_000212388