NYC-WTC_000230249

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1944 Lab Group #: 6575 Filter Type / Filter Area: MCE 385 mm’ Lab Sample #: 5 Grid Opening Size: 0.01124 Client Sample #: 5 Area Examined: 0,04496 mm* GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage:: 100 KeV # Grid Openings: 4 Analysis Date: 2/6/02

Analysis Performed By: MARK PEYSAKHOV

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

-.rx 9. .

Struct = > 0.5u >5:1 Aspect Ratio Grid acceptance: , 'J = Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5u V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria obsen/ed Chrysotile I AMPHIBOLES' I 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_003388979 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230249