TEM Asbestos air sample results, NYC BOE, Mar 2002

NYC 9/11 Public Portal Document

llEMAsbestosIahlCoiintSh^ Client Name: NY'C BOE Volume (liters): 1808 Lab Group #: 7207 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm-

GRID BOX: S22 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 Nor 7 EDS (Nonadb No F B C M >=05 p Chrys Amphibole Nonasb Ambig/ND <5p Elements) ------- 1

±:;

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

C- 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 grid squares <5% F B C M >5u EDS spectrum conforming to laboratory holes or opaque areas ident'tication criteria observed Chrysotile .AMPHIBOLES Amphibole F = Single Fiber Amosite B = BunrJIe (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster i>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003102808

NYC-WTC_000183564