TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1920 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 11 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 ' GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 9/15/02 Analysis Performed By: ~

ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/NO No Coord Elements)

52 / V’z. _JL__ //____ If

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance:

4= Positive diffraction pattern properties conforming to <50% undissolued filter, evertapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% M v'= EDS spectrum conforming to laboratory identification criteria observed holes or opaque areas Chrysotile LLLLS AiMPHlBOLES Amphibole F .= Single Fiber Amosite B ? Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430790 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175245