NYC-WTC_000226152

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1960 Lab Group #: 6343 Filter Tvpe / Filter Area: MCE 385 nW Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm^

GRID BOX: V Y Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 1/16/02

Analysis Performed By: MARK PEYSAKHOV

GO. • Structure Structure Type Length ID of Structure Notn EDS No (Nonadb F B C M >=05 p :>=5pi Chrys Amphibole Nonasb Ambig/ND No Coord , <5p Elements)

3 STV-

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% , F B C M >5p EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile ; AMPHIBOLES Amphibole F = Single Fiber- Amosite B = 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_2IMCl00_0 00623057 NYC-WTC_000226152