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): 1824 Lab Group #: 7034 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0.04496 mm^

GRID BOX: di-ZZ Magnification: 20,000 GRIPID; 'FZ'Vff Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 3/12/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nory" EDS (Nonadb No F B C M ■=05(j >=5p Chrys Amphibole Nonasb AmbigZND Coord <5u Elements)

1il

Struct = > 0.5)1 >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 observed least 20 unfolded or overlapped gnd squares <5% F i B C M >5m EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile .AMPHIBOLES Amphibole i F = Single Fiber Amosite Ambiguous j B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102454

NYC-WTC_000183316