TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1816 Lab Group #: 6990 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 12 (.ridOpening Si/e: 0.01124

Client Sample #: 15 Area Examined: 0,04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor V' EDS I (Nonadb I No F B C M mTu :>=5tJ Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) I

J

1 r

-

Struct = >0.5u >5:1 Aspect Ratio Grid acceptance:

/= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria obsen/ed least 20 unfolded or overiapped grid squares <5% [ I F I B C M i >5u 'N EDS spectrum conforming to acoraiorv holes or apaque areas 1 identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster ;>3 inte'sectionsi Anthophyllite Non-Asbestos T reniolite M = Matrix Actinolite Non-ldentified NSD = No Structures Detecteo

CITY_21MC100_003102387

NYC-WTC_000183284