TEM asbestos air sample results, NYC BOH, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOH Volume (liters): 1824 Lab Group #: 6897 Filter Type / Filter Area: MCE 385 mnr Lab Sample #: 9 Grid Opening Size: 0.01 124

Client Sample #: 12 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 Nor EDS (Nonadb No F B C M =5|J Chrys Amphibote Nonasb Ambig/ND No Coord <5p Elements)

XHZ J__ // E j— 1—

J-------- L 1

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

1= Positive diffraction pattern properties conforming Io <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% T F B C M 7= EDS spectrum conforming to laboratory boles 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 Actinolite Non-Identified NSD = No Structures Detected

CITY_21MC100_0 03102221

NYC-WTC_000183178