TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 6220 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 GRIDER Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/29/01

Analysis Performed By: MARK PEYSAKHOV

GC, I Structure Structure Type Length iD of Structure K or V EDS ■=05u ;>=5(j (Nonadb No 3 C M Chrys Amphibole Nonasb Amoig/ND No Coord Elements) i <5p

Struct = > 0 > 5:1 Aspect Ratio Grio acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped ortolded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unlolded or overlapped gnd squares <5% F B C M \i= EDS spectrum conforming to laboratory holes or opaque areas loentification critena observed Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle ,<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identmed Actinolite NSl = No Structures Detected

CITY_21MC100_003105172

NYC-WTC_000184473