TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filter si: 1936 Lab Group #: 5927 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0,01124

Client Sample #: 17 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/19/01

Analysis Performed By: MICHAEL GORYCKl

GO. Structure Structure Type Length ID of Structure N or 9 EDS (Nonadb No F B C M >=057) i >=5)J Chrys Amphibole Nonasb Ambig/ND No i Coord <5p 1 Elements)

/W iL-t a Ta If 5

Struct = > 0.5)1 >5:1 Aspect Ratio Grid acceptance: 'i= 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 >5m V= 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 Actinolite NSD = No Structures Detected

CITY_21MC100_0 03106599

NYC-WTC_000185465