TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NTC BOE Volume /liters): 1944 Lab Group #: 6010 Filter Type / Filter Area: MCE 385 mm= Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 7 Area Examined: 0.04496 mm=

GRID BOX: Magnification: 20.000 GRIDID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1/01

.Analysis Performed By: MARK PEYSAKHOV

GO. Structure Struciure Type Length ID of Structure N or- EDS (Nonadb No r B C >=06 p : '=5|j Chrys Amphibole Nonasb Ampig/ND No Coord <5p Elements)

A i

Struct = > 0 5i, >5:1 Aspect Ratio Grid acceptance:

>'= Positive diftraction pattern properties coniorming to <50% undissoived fitter, overlapped or folded Totals laboratory iaentification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B j C M 1= EDS spectrum coniorminc to atjoraioy holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES i Amphibole F = Single Fiber Amesite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix [ Non-Identified N3D - No Structures Detected Actinolite .J CITY_21MC100_003104425

NYC-WTC_000183971