TEM Asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1899 Lab Group #: 6015 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm-

GRID BOX: iVIa2nification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/1/01

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor v EDS (Nonadb No F B C M >=05 u >=5|J Chrys Amphibole Nonasb Ambig/ND No Coord <5|J Elements)

fl //

fc. ---

Li Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance:

V= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification critena observed least 20 unfolded or overlapped grid squares <5% F B C M >5p A- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber j Amosite B = Bundle (<3 fibers <1 fiber diameter apart I Crocidolite Ambiguous i Anthophyllite Non-Asbestos C = Cluster (>3 Intersections) Tremolite M = Matrix Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003467332 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000180655