TEM Asbestos air sample results, NYC BOE, Oct 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume /liters): 1936 Lab Group #: 5827 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 9 Grid Opening Size: 0,01124 Client Sample #: _ ■

Area Examined: 0.04496 mm" GRID BOX: Magnification: 20 000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or v ■ EDS No (Nonadb F B C M >=05 p >=5|j Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

P2. //

I i Struct = > 0.5(1 > 5:1 Aspect Ratio Grid acceptance: A= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals

___ n laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overapped grid spuares <5% I B C j M V = EDS spectrum conforming to laooratory holes or opaque areas I identification criteria observed Chrysotile i AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite I M = Matrix ! Non-Identified NSD = No Structures Deteoteo Actinolite i i .1.

CITY_21MC100_003106122

NYC-WTC_000185149