NYC-WTC_000215232

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1834 Lab Group #: 6576 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 . GRID ID: Accelerating Voltage: 100 KeV ■ # Grid Openings: 4 Analysis Date: 2/6/02

Analysis Performed By. MARK PEYSAKHOV

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

Struct = > 0.5p 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 overlapped grid squares <5% F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile fAMPHIBOLES Amphibole F = Single Fiber ' Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocirdolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002872056

NYC-WTC_000215232