NYC-WTC_000230397

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 Lab Group #: 7216 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 3 Grid Opening Size: 0.01124 Client Sample 3 Area Examined: 0.04496 mm- GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/26/02 ■

Analysis Performed By MARK PEYSAKHOV

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

,"7

-3

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 7 = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate

'J-EDS spectrum conforming to laboratory least 20 unfoided or overlapped grid squares <5% F B C M >5iJ 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) j Anthophyllite j Non-Asbestos I Tremolite : M = Matrix Non-ldefttified I Actinolite NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_002723176 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230397