NYC-WTC_000230169

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ClientNam^ NYC BOE Volume (liters): 1960 Lab Group #: 6491 Filter Type / Filter Area: MCE 3.85 mm^ Lab Sample #: 10 Grid Opening Size: 0.01124

Client Sample #: 10 Area Examined: 0.04496 mm"

GREP BOX: Magnification: 2Q,00Q GREP ED: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: ' 1/28/02

Analysis Performed By: MARK PEYSAKHOV

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

ci-

Struct = > 0.5n ->5:1 Aspect Ratio Grid acceptance: ^= Positive diffraction pattern properties conforming to undissoived filter, overlapped or folded Totab ■ laboratory identification criteria observed <10% particulate coverage >50% coverage ate . least 20 unfolded or overlapped grid squares <5% F B C M >5m '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.liber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos M = Matrix Tremolite Actinolite Non-Identified NSD = No Structures Detected

CONFIDENTIAL, CITY_21MC100_003388868

SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000230169