TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNajn^ NYC BOE Volume (liters): 1944 Lab Group #: 8022 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ibofStrudure NorW EDS (Nonadb No F B C M >=05 p >=5p Chrys Amphbole Nonasb Ambig/ND No Coord Elements) <5u

A

Struct = > 0.5p -> 5:1 Aspect Ratio Grid acceptance: ^/= Positive diffraction pattern properties conforming to <50% undissolved filter, overtapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overtapped grid squares <5% F B C M >5m V= 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 1 Crocidolite i Ambiguous C = Cluster (>3 Intersections) ■ Anthophyllite Non-Asbestos Tremolite M = Matra Non-Identified Actinolite NSD = Nc Structures Detected

CITY_21MC100_003105522

NYC-WTC_000184733