NYC-WTC_000226626

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 6694 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 2 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 2/16/02

Analysis Performed By: MARK PEYSAKHOV

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

— 3 1

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

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% C M >5u EDS spectrum conforming to laboratory identification critena observed holes or opaque areas Chrysotile LI® AMPHIBOLES : Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart ; Crocidolite Ambiguous C = Cluster (>3 Intersections) 1 Anthophyllite Non-Asbestos i Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002922778

NYC-WTC_000226627