NYC-WTC_000218341

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NA’C BOE Volume (liters): 1920 Lab Group #: 6986 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 1 Grid Opening Size: 0.01124

Client Sample #: 01 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20.000 GRID ID: Accelerating Voltage: iOO KeV # Grid Openings: 4 Analysis Date: 3/8/02

Analysis Performed By; MARK PEYSAKHOV

GO, Structure Structure Type Length !D of Structure N or y j EDS : No’ >=05 u Amphibole j NonaS | Ambig/ND ; (Nonadb | C M >=5p Chrys Elements- I No Coord <5p

— 3

Struct = > 0 5).i >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 i C I M I >5u EDS spectrum conforming Io laboratory holes or opaque areas identification criteria observed Chrysotile T ; 1 ,XMPHIBOLE.S Ampinbole F = .Single Fiber Amosite B = Bundle (<3 libers <1 liber diameter apart Crocidolite Ambiguous i C - Cluster j>3 Intersections) Anthophyllite Non-Asbestos j Tremolite M = Matrix Actinolite Non-ldentified I NSD = No Structures Detected

CITY_21MC100_000466330 NYC-WTC_0002 18341