TEM asbestos air sample results, NYC BOF, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOF. Volume (liters): 1816 Lab Group #: 6897 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: I I Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0,04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/2/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or 4 EDS No (Nonadb F B C M >-5(j Chrys Amphiboie Nonasb Ambig/ND No Coord <5|J Elements)

- r 1----- 1-----1----- \ 6/ //^ 1—I ]---- i M I 1

—1

—i-

Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: 9= 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 gnd squares <5% F B C I M >5U 4= EDS spectrum conforming to laboratory holes 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 Tremolite M = Matrix Non-Identified Actinolite NSD = Nc Structures Detected

CITY_21MC100_0 03102223

NYC-WTC_000183180