NYC-WTC_000212556

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet ('lient Name: NYC BOE Volume (liters): 1920 1 ab Group #: 7719 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 9 Grid Opening Size: 0.01124

Client Sample #: 09 Area Examined: 0.04496 mm*

GRID BOX: . S' Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV Grid Openings: 4 Analysis Date: 5/12/02

Analysis Performed By: MARK PEYSAKHOV

GO Structure Structure Type Length ID of Structure N or v £03 (Nonadb No F B C M >=05 p >=5p Chrys Amphibole Nonasb AmbigyND No Coord <5p Elements)

i

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: 7= Positive diffraction pattern praperties conforming to <50% undissolved filter, overlapped or folded Totals aboratory identification critena ooserved <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C M >5p EDS spectrum conforminc to laboratory holes or opaque areas dentification criteria observed Chrysotile AMPHIBOLES Amphibole - = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous 2 = CiLSter(>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-ldentified Actinolite NSD = No Structures Detecte f

CITY_21MC100_002867112

NYC-WTC_000212556