NYC-WTC_000191324

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: _NYCBOE Volume (liters): 1920 Lab Group 7801 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 12 Grid Opening Size: 0.01124 Client Sample #: 12 Area Examined: 0,04496 mm-' GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/20/02

Analysis Pertormed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of structure Nor EDS No (Nonadb F B C M >=05 p :>=5|j Chrys Amphibole Nonasb Ambig/ND „_ No Coord <5p Elements)

7^2 #

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Struct = ■> 0.5p > 5:1 Aspect Ratio Ghd 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 overiapped grid squares <5% F B C M ?5m ■•J-EDS spectrum conforming to laborato^ holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite 0 = 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

CITY_21MC100_003090561

NYC-WTC_000191324