TEM asbestos air sample results, NYC BOE, Dec 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 9210 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0 04496 mm-

GRID BOX: jVIagnirication: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/26/200

Analysis Performed By: MARK PEYSAKHOV

I GO Structure Structure Type Length ID of Structure N or EDS No (Noradb F B C M '=5|j Chrys Amphibole Nonasb Ambig/ND Elements) ' No I Coord <5p / — a

; 1 i I__________________________________ i rni___________ ___ ; i ______ i HhoioNo i (Jrom Imo ___ I asbestos containing samples) Gnd acceptance Struct = > 0 5m >51 Aspect Ratio <50% undissolved filter ovedapped or folded Totals \'= Positive diffraction oattem properties conforming io <10% particulate coverage >50% coverage ate laboratory identification criteria ooserved least 20 unfolded or ovedapped gnd squares >;u i <5% holes or opaque areas F B C M EDS spectrum conforming to laboratory identification criteria observed Chrvsotile AMPHIBOLES | Amphibole F = Single Fiber Amosite 5 = Bundle (<3 fibers <1 fiber diameier apart Crocidolite Ambiguous i Anthophyllite j C = Cluster (>3 Intersections) ! Tremolite । Non-Asbestos M = Matrix ' Actinolite ' Non-Identtfied MSD = No Structures Detected

CITY_21MC100_003043179

NYC-WTC_000196842