TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NA^C BOE Volume (liters): 1816 Lab Group #: 7207 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124

Client sample #: 07 Area Examined: 0.04496 mm-^

GRID BOX: GRID ID: # Grid Openings: 4 IM Magnification: Accelerating Voltage: AnalvsisDate: 20,000 too KeV 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or N EDS (Nonadb ! No F B C M >=05 p : -5(j Chrys Amphibole Nonasb Ambig/ND No Coord <5(1 Elements)

I

5 EH

Struct = > 0.5(1 > 5:1 Aspect Ratio Gnd acceptance:

N = 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 overtapped grid squares <5% F B C M j >5u v = EDS spectrum conforming to iaborato7 holes or opaque areas identification criteria observed Clirysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite ! NSD = No Structures Detected

CITY_21MC100_003102805

NYC-WTC_000183561