NYC-WTC_000207610

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): ,1920 Lab Group 8226 Filter Type / Filter Area: MCE -385 mm? Lab Sample -7' Grid Opening Size: 0.01124 Client Sample #: 7 Area Examined: 0.04496 mm^

GRID BOX: Maenification: 20,000 - GRID ID: 7/^ Accelerating Voltage: 100 .KeV - # Grid Openings: 4 Analysis Date: 6/23/02 ,

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure NorN EDS No >=05 g 4 (Nonadb B C M >=5p. Chrys Amphibole Nonasb Ambig/ND No Coord <5g . . Elements)

7^. ^^5

Struct = > 0.5g > 5:1 Aspect Ratio Grid acceptance: • 'I- Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals laboratory identification criteria observed. <10% paniculate cbverage >50% coverage ate least 20 unfolded or’overiapped.grid squares <5% F B C M >5p 'i- EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed ■ Chrysotile ! AMPHIBOLES ! Amphibole F = Single Fiber : Amosite 0 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite i Ambiguous C = Cluster (>3 Intersections) Anthophyllite ! Non-Asbestos Tremolite , i M = Matrix Non-ldentified Actinolite NSD = No Structures Detected

CITY_21MC100_003015491

NYC-WTC_000207610