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 niters): 1840 Lab Group #: 7466 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 8 Grid Opening Size: 0.01124 Client Sample #: 08 Area Examined: 0.04496 mm* GRID BOX: Magnification:20,000 GRIDID: AcceleratingVo 11 age: 100 KeV # Grid Openings: 4 Analysis Date: 4/20/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or '/ EDS j No (Nonadb F B C M >=05 u Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements) i ---------- 1

^-7

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

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

CONFIDENTIAL, CITY_21MC100_003471155 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176986