NYC-WTC_000191411

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count: et Client Name: NYC BOE . ne (liters): 1920 Lab Group #: 7851 Filter Tvp liter Area: MCE 385 mm" Lab Sample #: 18 Griii ening Size: 0.01124 Client Sample #: 18 ■Ai Examined: 0.04496 mm^ GRID BOX: :nification: 20,000 GRIDID; Accel. ;ig Voltage: 100 KeV # Grid Openings: 4 .Tvsis Date: 5/25/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length structure NorV EDS No (Nonadb No Coord F B C M >=05 p >=5u Chrys Amp Nonasb Ambig/ND Elements) <5u

J

Struct = > 0,5|j > 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 ■^= EDS spectrum conforming to laboratory identification criteria observed least 20 unfolded or overiapped grid squares <5% holes or opaque areas c rysotile F B C M >5u

AMPHIBOLES iiibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite 'igUOUS C = Cluster (>3 Intersections) Anthophyllite sbestos Tremolite M = Matrix N .4, jiitified Actinolite NSD = No Structures Detected

CITY_21MC100_003090681

NYC-WTC_000191411