NYC-WTC_000221837

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 7494 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 6 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496 mm^

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 4/21/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or 7 EDS (Nonadb No F B C M >=5p Chrys Amphibole Nonasb Ambig/ND No Coord <5iJ Elements)

.T

I I

1

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

y'= Positive diffraction pattern properties conforming io <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% I F B C M ! >OP y = EDS spectrum conforming to laboratory _________________ i__ loentification criteria obserjed holes or opaque areas

AMPHIBOLES Chrysotile Amphibole ni r = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apan Crocidolite .Ambiguous C = Clusier (>3 intersections) Anthophyllite Non-.Asbesto.s Tremolite M = Matrix N'on-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_002888746

NYC-WTC_000221837