TEM asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 5886 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 13 Grid Opening Size: 0.01124

Client Sample #: 13 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: x«c- Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/13/01

Analysis Performed By: MARK PEYSAKHOV

GO, Structure Structure Type Length ID of Structure Nor v EDS INonadb No F B C I M >=05 jj ■=5(J Chrys Amphibole Nonasi? i Ambig/ND No Coord <5 pi Elements)

Struct = > 0.5u > 5:1 Aspect Ratio Grid acceptance;

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 gnc squares <5% ' B C M I >5p vG EDS spectrum conforming to laboratory holes or opaque areas I ! Identification criteria observed Citrvsonie j AMPHIBOLES Amphibole F = Single Fiber Amosite a = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous ; C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos 1 Tremolite M = Matrix Non-Identified i Actinolite NSD = No Structures Detected

CITY_21MC100_003106365

NYC-WTC_000185315