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): 1944 Lab Group #: 6051 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/6/01

Analysis Performed By: iMARK PEYSAKHOV

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

i - J__ I

Struct = >■ 0.5)1 .>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% F B C M >5u N= EDS spectrum conforming to laboratory holes or opaque areas identification critena observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apan Crocidolite Ambiguous C = Cluster ;>3 Intersections) I Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified I Actinolite NSC = No Structures Cetecied

CITY_21MC100_003104526

NYC-WTC_000184022