NYC-WTC_000202558

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCBOE Volume (liters'): 1920 Lab Group #: 8730 : : Filter Type/ Filter Area: , MCE 385 mm^ ' Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #; r<13 ; Area Examined: 0.G4496

GRID BOX: Magnification: 20,000 GRID ID : Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 8/22/02

Analysis Performed By: ' ■I- roman’peysakhov I

Length ID of structure , N or vT EDS , ' , ■'GO Structure Structure Type (Nonadb No Coord No ■ F ' B C M >=05 |J <5p 7/ Chrys; Amphibole Nonasb Ambig/ND' ■ Elements)'

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

Positive diffraction pattern properties conforming to <50% undissoived filter, overlapped or folded Totals i •taboratory identification criteria observed <10% particulate coverage *50% coverage ate

4= EDS spectrum conforming to laboratory ' least 20 unfolded or overlapped grid squares <5% holes or opaque areas A e M >5p

identification criteria observed Chrysotile AMPHIBOLES Amphibole / F = Single Fiber; ' Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous i Anthophyllite Non-Asbestos C = Cluster (>3 Intersections) Tremolite ,1 M = Matrix ; • Actinolite Non-ldentified NSD = No Structures Detected

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cItyZI IMC10 bZoO 3 2173 4 0 2

NYC-WTC_000202558