TEM Asbestos air sample results with identification criteria, NYC BOE,

NYC 9/11 Public Portal Document : Client Name: Lab Group#: NYC BOE 6843 Lab Sample #: Client Sample #: 20 GRID BOX: 866 GRID ID: iFzE #Grid Openings: 4 Analysis Performed By: <HC MARK PEYSAKHOV Structure Type FBTCM Length $=05M >=5ụ <5u TEM Asbestos (air) Count Sheet Volume (liters): : 1816 Filter Tvpe / Filter Area: MCE Grid Opening Size: 0.01124 Area Examined: 0.04496 Magnification: 20,000 Accelerating Voltage: 100 KeV Analysis Date: 2/27/02 385 mm: mm' GO. Structure No No Coord EIY8 tro 2.15 -i 3 5/ Chrys 1D of Siructure Nor V Amphibole Nonasb Ambig/ND EDS (Nonadb Elements) Struct = > 0.5M > 5:1 Aspect Ratio V= Positive diffraction pattern properties conforming to laboratory identification criteria observed V= EDS spectrum conforming to laboratory identification criteria observed F = Single Fiber B = Bundle (<3 fibers ‹1 fiber diameter apart C = Cluster (>3 Intersections) M = Matrix NSD = No Structures Detected Grid acceptance: <50% undissolved filter, overlapped or folded <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% holes or opaque areas AMPHIBOLES Amosite Crocidolite Anthophyllite Tremolite Actinolite Totals F B C M Chrysotile Amphibole Ambiguous . Non-Asbestos Non-Identified CITY_21MC100_003103537 NYC-WTC_000183925