NYC-WTC_000228840

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1808 Lab Group #: 7698 Fitter Type / Filter Area: MCE 385 mm- Lab Sample #: 4 Grid Opening Size: 0.01124 Client Sample #: 06 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 5/11/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length fD of Structure N or v EOS (Nonadb No F B C M >=05 p ; •=5iJ Ctirys Amphibole Nonasb Ambig/NO No Coord <5p Elements)

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Struct = > O.Sg > 5.1 Aspect Ratio Grid acceptance: 4- Positive biffraction pattern prepertes conforming to <50% undissoived filler, overapped or folded Totals laOoratoiy identification criteria observed <10% particulate coverage >50% coverage ate feast 20 unfolded or overlapped grid squares <5% F B C M >5rj 'J= EDS spectrum confwming to laboratory doles or opaque areas identification criteria observed Chrysotile AMPHtSOLES Amphibole r = Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections} Anthophyllite Non-Asbestos T remolite Vl s Malrix Actinolite Non-Identified NSD = Mo Stfuciures Oelected

CITY_21MC100_002901781

NYC-WTC_000228840