TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: WC BOE Volume /litersI: 1936 Lab Group #: 5948 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 21 Area Examined: 0.04496 mm-'

GRID BOX: Magnification: 20,000 GRID ID: Accelerating A oltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/21/01

Analysis Performed By: MICHAEL GORYCKl

GO, Structure Structure Type Length ID of Structure N or N EDS No F B C M ver/ =5|j Chrys Amphibole Nonasb Ambig/ND (Nonadb No Coord <5p Elements)

'MP X 6

fpfc'

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: ■/= Positive diffraction pattern properties conforming to <50% undissolved filler, 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 AMPHIBOLES i Amphibole F = Single Fiber Amosite B = Bundle (<3 fioers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ' T remolite M = Matrix N on-Identified i Actinolite NSD - No Structures Detected I______ i

CITY_21MC100_003083442

NYC-WTC_000189091