TEM Asbestos air sample results, NYC BOE, June 2002

NYC 9/11 Public Portal Document

TEMAs stos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1800 Lab Group #: 8242 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm^

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

Analysis Performed By: ILK PEYSAKHOV

GO. Structure Structure Type Length ID of Stnjcture Nory EDS No (Nonadb F B C M er :>=5p Chrys Amphibole Nonasb Ambig/ND No Coord Elements)

Struct = > 0.5p > 5:1 Aspect Ratio Grid .1.,

Positive diffraction pattern properties conforming to <5C . • ed filter, overtapped or folded Totals laboratory identification criteria observed <10 0 1 coverage >50% coverage ate leas '; _■ J or overlapped grid squares <5% F B C M >5U ^1= EDS spectrum conforming to laboratory hole : .ireas identification criteria observed Chrysotile I" ■ OLES Amphibole F = Single Fiber rite B = Bundle (<3 fibers <1 fiber diameter apart □file Ambiguous C = Cluster (>3 Intersections) y lite Non-Asbestos lite M = Matnx il le Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003461773 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179895