NYC-WTC_000227888

NYC 9/11 Public Portal Document TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6734 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 04 Area Examined: 0.04496 mm? GRID BOX: 23s” Magnification: 29 900 GRID ID: Bre Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/19/02 Analysis Performed By: Oe Co ° MARK PEYSAKHOV GO. Structure Structure Type Length ID of Structure Nor Vv Newt No 3205 = Amphibole | Nonasb | AmbigiND ona No Coord FiB|¢c|M Sp 7-5} Chrys em ona ms Elements) 2-3) } | } Struct = > 0.5 > 5:1 Aspect Ratio Grid acceptance: = Positive diffraction pattem properties conforming to “50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfoided or overlapped grid squares <5% FIBiCIM! >5p j= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Oe Chrysotile , AMPHIBOLES Amphibole F = Single Fiber Amosite - | B = Bundle (<3 fivers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster £>3 Intersections) , Anthophyllite | Non-Asbestos . ' Tremolite - M = Matrix i Actinolite Non-Identified NSD = No Structures Detected NYC-WTC_000227888 CITY_21MC100_002899400