TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEM jstos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 8242 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 17 Area Examined: 0.04496 mm*

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 AnalvsisDate: 6/23/02

Analysis Performed 1/ : PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor\ EDS (Nonadb No F B C M I •5|j I- : '=5p Chrys Amphibole Nonasb Ambig/NO No Coord Elements)

Struct = > 0.5g > 5:1 Aspect Ratio Gfu, mce:

a/= Positive diffraction pattern properties confomiing to .dived inter, overlapped or folded Totals ,'d coverage >50% coverage ate laboratory identification criteria observed lea; .. j ar ovetlapped.grid squares <5% F B C M ’5m ^1= EDS spectrum conforming to laboratory hoi , ; areas identification criteria observed Chrysotile I BOLES Amphibole F = Single Fiber losite 8 = Bundle (<3 fibers <1 fiber diameter apart Jdolite - Ambiguous C = Cluster (>3 Intersections) phyllite. Non-Asbestos nolilG M = Matrix Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461774 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179896