TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NVC BOE Volume (liters): 1928 Lab Group #: 5874 Filter Type / Filter Area: MCE 385 mm* Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 4 Area Examined: 0,04496 mm^ GRID BOX: Magnification: 20,000 GRID ID: 2^2 Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 11/11/01

Analysis Performed By: ROMAN PEYSAKHOV

GO, Structure Structure Type Length ID of Structure N or y EDS (Nonadb No F B C M >=0^11 : '=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5p Elements)

.Zv® 1 /I

3'3 =

H i T

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance:

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 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 <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003106298

NYC-WTC_000185266