TEM Asbestos air sample results, NYC BOE, Apr 2002

NYC 9/11 Public Portal Document

/ TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 7291 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 mm*

GRID BOX: GRID ID: w Magnification: Accelerating Voltage: 20,000 too KeV # Grid Openings: 4 Analysis Date: 4/1/02

.Analysis Pertormed By: ^'7 ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS ! No (Nonadb i F B C M >=05 u >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5m Elements) i

JL 1/

1_i I

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

\= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% ! F i B j C M I >5u \ = EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile amphiboles Amphibole i H = Single Fiber Amosite 5 = 3unale ;<3 fibers <1 fiberciameter apart Crocidolite .Ambiguous 1 C = Cluster '>3 Intersections) Anthophyllite j Non-Asbestos ! M = Matrix Tremolite j Non-Identified i ---- [ Actinolite I I NSD = No Structures Cetectec

CONFIDENTIAL, CITY_21MC100_003470754 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176714