NYC-WTC_000228750

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1800 Lab Group #: 7625 Filter Type / Filter Area: MCE 385 mm* Lab Sample#: 10 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0.04496 mm*’

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

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS No (Nonaib F B C M >=OSu Chrys Amphtooie Nonasb AmbigjND No Coord EiementsJ

1 47 ■■

I J Struct = > 0.5p > 5'1 Aspect Ratio Grid acceptance.' Positive diffraction pattern properties conforming to <50% undissoWad filter, overlapped or foWed Tot^ laboratory identification criteria observed <10% parttculale coverage >50% coverage ate least 20 unfolded or overtappea grid squares <5% F B C >5tJ 'i- EDS soecfrum confontiing 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) Arstfiopbylilte Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified HSD - No Structures Detected

CITY_21MC100_002901619

NYC-WTC_000228750