TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1952 Lab Group #: 6208 Filter Tvpe / Filter Area: MCE 385 mm- Lab Sample #•. Grid Opening Size: 0.01124

Client Sample #: Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/27/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Siructure Type ; Length ID of structure N or EDS No (Nonadb F B C M i >=05 p Chrys Amphibole Nonasb Ambig/ND Nc Coord I <5|J Elements)

YC 4X2 ^71

Struct = > 0.5 u > / : I Aspect Ratio Grid acceptance;

.“ositive diffraction pattern properties oonforming 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% B C M >5m y= EDS spectrum conforming to iaboratory holes or opaque areas I identification criteria observed Chrysotile AMPHIBOLES Amphibole E = Single Fiber Amosite B = Bundle (<3 fibers <" fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Vlatrix Non-Identified Actinolite NSD = Nc Structures Detected

CITY_21MC1OO_OO31O5134

NYC-WTC_000184448