Asbestos air analysis results, H.S., April 2002

NYC 9/11 Public Portal Document

TEM Asbestos fair) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7337 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 11 Area Examined: 0.04496 mm- GRIP BOX: Magnification: 20,000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 4/5/02

An^ysis Performed By^ MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or 7 EDS No (Nonadb F B C M >=05 p i>=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements)

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

9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or foldeo Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% [ B I C I M [ >5u 7= EDS spectrum conforming to laboratory holes or opaque areas I Chrysotile identification criteria obsen.'ea AMPHIBOLES I ! Amphibole I___ L F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 1 C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos ( Tremolite M = Matrix Non-Ideimfied j Actinolite NSC = No Siructures Detected

CONFIDENTIAL, CITY_21MC1OO_OO34599O9 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179529