TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume niters): 1920 Lab Group #: 7274 Filter Type / Filter Area: MCE 385 mnr Lab Sample #: 19 Grid Opening Size: 0.01124 Client Sample #: 19 Area Examined: 0,04496 GRIP BOX: J Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/30/02

Analysis Performed By: l\J/ ROMAN PEYSAKHOV

GO. structure Structure Type Length ID of Stmcture NorV EDS (Nonadb No F B C M >=OS|J >=5p Chrys Amphibole Nonasb Ambig/ND / // / Coord <5p Elements)

t c

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance: Positive diffracfion pattern properties conforming to "50% undssolved filter, overlapped or folded Totals ___ .j laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5|j 'i- 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_21MC1OO_OO3O89243

NYC-WTC_000190364