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): 1920 6142 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #: 17 Grid Opening Size: 0.01124 Client Sample 17 Area Examined: 0.04496 mm-

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/19/01

Analysis Performed By: ROMAN PEYSAKHOV

30. Structure Structure Type Length ID of Structure N or V EDS No (Noradb F E C M >=05 p : '=5(J Chrys J Amphibole Nonasb Ambig/ND Elements) No Coord <5U

b // 3^

I I Struct = > 0.5u > C1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conlorming 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 >5(j EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <". fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified i Actinolite N3D = No Structures Detected

CITY_21MC100_003104912

NYC-WTC_000184295