TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: N^^C BOE Volume /liters): 1824 Lab Group #: 7207 Filter Type / Filter Area: MCE 385 mm" Lab Sample #: 18 Grid Opening Size: 0.01124

Client Sample #: 21 AreajNamin ed: 0.04496 mtn^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or y EDS (Nonadb No F B C M >=05 p >=5l Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

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

7= 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 ord squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile AMPHIBOLES Amphibole E = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections! Anthophyllite j Non-Asbestos i Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102819

NYC-WTC_000183575