TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air ) Count Sheet Client Name: NV'C BOE Volume (liters): 1952 Lab Group #: 5891 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 16 Grid Opening Size: 0.01124

Client Sample #: 16 Area Examined: 0.04496 mm=

GRID BOX: Magnification: 20,000 GRID ID: -) /VY- Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/15/01

Analysis Performed Bv: ROMAN PEYSAKHOV

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

Zz t( /I

j__ I i I 1 r ETj Struct = > 0.5p _> 5: i Aspect Ratio Grid acceptance: 9= Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals <10% particulate coverage >50% coverage ate laboratory identification criteria observed least 20 unfolded or overtapped grid squares <5% F B C j M I >5u 9= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile j ----------------- --------------- k 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 J____ i M = Matrix NSD = No Structures Detected Actinolite Non-Identified i . . J. i i

CITY_21MC100_003106429

NYC-WTC_000185351