NYC-WTC_000204687

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: OTC BOE Volume (liters): 1920 Lab Group #: 7246 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124

Client Sample #: 02 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/28/02

Analysis Performed By: MARK PEYSAKHOV

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

i i I Struct = > 0 5|u > 5' 1 Aspect Ratio Gnd acceptance:

v = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% oartculate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped gnd squares <5% / 'J = EDS spectrum conforming to laboraton/ identification criteria observed holes or opaque areas I______ Chrysotile , i ' . AMPHIBOLES Amphibole f F = Single Fiber Amosite 3 = Sundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ■ I S = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix I Non-ldentified i > Actinolite NSD = No Structures Detected

CITY_21MC100_003061716

NYC-WTC_000204687