TEM asbestos analysis data sheet, Sep 2002

NYC 9/11 Public Portal Document

■ ■:>

TEM Asbestos (air) Count Sheet Client Name: ATC Volume (liters): 1944 Lab Group #: 8837 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: to Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm^ GRIP BOX: Ma2nification: 20,000 . GRIP ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 9/15/02 Analysis Performed By: ^7

ROMAN PEYSAKHOV

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

/JU (I

i/s -

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

V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

/= EOS spectrum conforming to laboratory least 20 unfolded or ovedapped grid squares <5% holes or opaque areas P B C M i >5u Identification criteria cosenred Chrysotile AMPHIBOLES .Amphibole F = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthoptiyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003430789 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000175244