NYC-WTC_000203445

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 1920 Lab Group #: 6572 Philter Type / Filter Area: MCL 3S5 nim- Lab Sample #: 3 Grid Opening Size: 0.01124

Client Sample #: 3 Area Examined: 0.04496 mm-

GRID BOX: ■Magnification: 20.000 GRI D ID: ■Ci ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

Structure Structure Type Length ID of Structure N or GO ------------ 1! No .Nonadb F B C M >=05 p i ■=5m Chrys Amphibole Nonasb Ambig/ND No Coord I <5p Elements)

>

4

Struct = > 0.5(1 > 5:1 As|3ect Ratio Grid acceptance:

'J= Positive diffraction palterr. properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate iaooratory identification criteria observed least 20 unfolded oroveriapped grid squares <5% I B C j M ' >5p = EOS spectrum conforming to laboratory F holes or opaque areas identification criteria ocserved Chiysotile ■AMPHIBOLES Amphibole F : S ngis Fiber Armosite 5 = Bund e (<3 fibers <1 fiber diameter apart Crocidolite ■Ambiguous C = Cluster i>3 Intersections! Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite MSC = Uo Structures Delected

CITY_21MC100_003068251

NYC-WTC_000203447