NYC-WTC_000229841

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7684 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124

Client Sample #: 05 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/9/02

Analysis Performed By: MARK PEYSAKHOV

GO. ] Structure Structure Type Length ID of Structure N or v EDS (Nonadb I No F B C M >=Q5p i>=5p Chrys Amphibole Norasb Ambig/ND No Coord Elements) <5p

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

'J= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overlapped grid squares <5% F B C M >5u '1= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723119 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000229841