NYC-WTC_000230376

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7204 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 2 Area Examined: 0.04496 mm^ GRID BOX: ■5^ 173 Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/25/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length. ID of Structure N or n/ EDS No >=05 p (Nonadb F B C M >=5p Chrys Amphibole Nonasb ■ Ambig/ND No Coord <5p Elements)

(f 7

Struct = > 0 5u _> 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to '^50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <1D% particulate coverage >50% coverage ate

9= EDS spectrum conforming to laboratory least 20 unfolded or overlapped grid squares <5% F B C M >5u holes or opaque areas identification criteria observed Chrysotile "amphiboles' i Amphibole F = Single Fiber Amosite . j a = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ■ Ambiguous C = Cluster (>3 Intersections) ' Anthophyllite j Non-Asbestos Tremolite ! M = Matrix Non-Identified Actinolite ! NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC1OO_OO3389179

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230376