TEM Asbestos air sample results, NYC BOE, Feb 2002

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1848 Lab Group #: 6765 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: Area Examined: 0.04496 mm* GRID BOX: GRIDED: w/ 09 Magnification: Accelerating Voltage: 20,000 100 KeV # Grid Openings: 4 Analysis Date: 2/21/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure Nor N EDS No >=05 u :>=5p (Nonadb F B C M Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

W n

Struct = >0.5u > 5:1 Aspect Ratio Grid acceptance: Positive diffraction pattern properties conforming to <50% undissolved filler, overiapped or folded Tot^ laboratory identification criteria observed <10% partcuiate coverage >50% coverage ate

EDS spectrum conforming to laboratory least 20 unfolded or overiapped grid squares <5% holes or opaque areas IM® c M I >51J identification cnieria observed Chrysotile | I I : AMPHIBOLES : Amphibole I r = Single riber Amosite i 3 = 3undle'(<3 fibers <1 fiber diameter aoart Crocidolite i Ambiguous I C = Cluster (>3 intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Idenrified . NSC = No Structures Detected Actinolite i ! I CITY_21MC100_0 03103362

NYC-WTC_000183838