NYC-WTC_000230399

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1936 Lab Group #: 7216 Filter Type / Filter Area: MCE 385 Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 6 Area Examined: 0.04496 mm^ GRID BOX: Magnification: 20,000 GRIDED: Accelerating Voltage: TOO KeV # Grid Openings: 4 Analysis Date: 3/26/02

Analysis Performed By: MARK PEYSAKHOV

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

■------- -- 23 <5

Struct = > 0.5p .> 5:1 Aspect Ratio Grid acceptance: v- Positive diffraction pattern properties conforming Io <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% holes or opaque areas F B c M identification criteria observed Chrysotile , amphTboleT? Amphibole F = Single Fiber ; Amosite j B = Bundle (<3 fibers <1 fiber diameter apart ) Crocidolite I Ambiguous C = Cluster (>3 Intersections) ) Anttiophyliite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723179 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230399