TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document Client Name: Lab Group#: Lab Sample #: Client Sample #: GRID BOX: GRID ID: # Grid Openings: 4 NYC BOE 7459 4 07 1088 205 Analysis Performed By: TEM Asbestos (air) Count Sheet Volume (liters): 1816 Filter Type / Filter Area: MCE 385mm' Grid Opening Size: 0.01124 Area Examined: 0.04496 mm? Magnification: 20,000 Accelerating Voltage: 100 KeV Analysis Date: 4/18/02 GO. No Coord 1Ki 2 Structure No 250 Structure Type IFB CM MARK PEYSAKHOV Length >=05 v >=5y Chrys T Ämphibole ID of Structure Nor V Nonasb Ambig/ND EDS (Nonadb Elements) EpE Struct = > 0.5u > 5:1 Aspect Ratio V= Positive diffraction pattern properties conforming to laboratory identification criteria observed V= EDS spectrum conforming to laboratory identification criteria observed Grid acceptance: <50% undissolved filter, overlapped or folded ‹10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% holes or opaque areas F = Single Fiber B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) M = Matrix NSD = No Structures Detected AMPHIBOLES Amosite Crocidolite Anthophyllite Tremolite Actinolite Totals F B M >5p Chrysotile Amphibole Ambiguous Non-Asbestos Non-Identified CITY_21MC100_003101891 NYC-WTC_000182947