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): 1936 Lab Group #: 6165 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 18 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496 mm^

GRID BOX: On-.- Magnification: 20,000- GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 12/21/01

Analysis Performed By. /?/=> ROMAN PEYSAKHOV

GO. I Structure ; Structure Type Length ID of Structure NorN EDS ] No F B C M >=0^)1 :>=5|j Chrys Amphiboie Nonasb | Ambig/ND (Nonadb No Coorc <5p elements)

1 £ {S II

I I Struct = > 0.5|J > 5:1 Aspect Ratio Grid acceptance:

7= Positive oiffraction 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 C M i >5m EDS spectrum conforming to laboratory holes or opaque areas Identification criteria observed Chrysotile AMPHIBOLES ' Amphibole F = Single ^ioer Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Idenhfied Actinolite NSD = No Structures Delected ._j_ -

CITY_21MC100_003104971

NYC-WTC_000184336