TEM asbestos air sample data, NYC BOE, Aug 2002

NYC 9/11 Public Portal Document

TEMAsbestosfair) Count Sheet Client Name: BOE Volume (liters): 1920 Lab Gr()U£^ 8760 Filter Type / Filter Area: MCE 385 Lab Sample #: 4 Grid Opening Size: 0,01124 Client Sample #: 4 Area Examined: 0.04496

GBJD BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/25/02

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 >-5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

zsS —

■Struct = > 0.5m >53 Aspect Ratio Grid acceptance: 7^ Positive diffraction pattern properties conforming 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% F B C M >5u 7= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES 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 NSb = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430448 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175166