TEM asbestos air sample results, NYC BOE, Dec 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): W36 Lab Group #: 6229 Filter Type / Filter Area: VICE 385 mm- Lab Sample #: 14 Grid Opening Size: 0.01124

Client Sample #: 14 Area Examined: 0.04496

GRID BOX: . Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV ji Grid Openings: 4 Analysis Date: 12/30/01

Analysis Performed By: ROMAN PEYSAKHOV

GO Structure , Structure Type Lengtfi ID of Structure Nor N EDS (Nonadb ; No r? B C M '=51J Chrys Amphibole Nonasb i Ambig/ND Elements) i No Coord <5|J ------------ i Y/1 gc -’ I t U- (i

Struct = > 0.5,u > 5:1 Aspect Ratio Grid acceptance:

Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded T otals laooratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overiapped grid squares <5% F } B ) C I M i >5p V- EDS spectrum conlorming to laboratory holes or opaque areas denlification critena observed Chrysotile AMPHIBOLES Amphibole = Single Fiber Amosite 3 = Bundle (<3 fibers <' fiber diameter apart Crocidolite Ambiguous [ -------------------- 1 C = Cluster {>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = No Structures Detected

CITY_21MC100_003105203

NYC-WTC_000184493