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 #: 9 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mrn-

GRID BOX: Mannification: 20,000 GRID ID: Accelerating V oltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/9/02

■Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure Nor 7 EDS (Nonadb I No F B C M >=05 p >=5|j Chrys Amphibole Nonasfc Ambig/ND No Coord Elements)

n —h

J---

Struct = ■> U 5li >5tl Aspect R.itio Grid acceptance

7 = Positive diffraction pattern properties conforming to <50% undissolved [liter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria obsen/ed least 20 unfolded or overlapped grid sguares <5% 0 F I B I C i M ! >5u 7= EDS spectrum conforming to 'lacoratoiy' noies 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 i Tremolite M = Matrix Actinolite J Non-Identified USD = No Structures Delected

CITY_21MC100_003102377

NYC-WTC_000183278