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): 1840 Lab Group #: 7235 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 17 Grid Opening Size: 0.01124

Client Sample #: 20 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/27/02

Analysis Performed By: v ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS (Nonadb ! No F B C W >=05 M Chrys Amphibole Nonaso Ambig/ND Elements) ! No Coord <5p 6-1 rtz

J I

Struct = > 0.3p >5:1 Aspect Ratio Grid acceptance: n'= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate iaboratory identification criteria obsen/ed least 20 unfolded or overlapped grid squares <5% F B I C M >5|j 7= EDS spectrum conforming to laboraton/ holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole r = Single riber Amosite S = Bundle (<3 -ibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-.Asbestos Tremolite M = Matrix I Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102868

NYC-WTC_000183616