NYC-WTC_000200579

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1840 Lab Group #: 8161 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 2 Grid Opening Size: 0.01124 Client Sample #: 02 Area Examined: 0.04496 GRID BOX: dr Magnification: 20 000 GRID ID: cST* Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 6/18/02

Analysis Performed By; MARK PEYSAKHOV

GO. Structure Structure Type Length ID of structure Nori EDS / No < (Nonadb F B C >=05 pl •=5p Ghrys Amphibole Nonasb, .Ambig/ND : Mo' Coord <5p Elements)

, Y Z a: z- — -,21^7 < 2-^<7 — T/'iC I f . , H------- p------- — -- ------ —------- ----------

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. Struct = > 0.5n, ;> 5 :11 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to '^50% undissolved filter, overlapped orlolded Totals laboratory identification criteria observed = : <10% particulate coverage >50% coverage ate - . least 20 unfolded or overlapped grid souares <5% F B C M >5p .T = EDS spectruni conforming to laborsroy 'tioles or opaque areas / ■ identification criteria observed: Chrysotile .A/MPHIBOLES Amphibole ■' F = Single FiberI Amosite ‘ B = Bundle (<3.fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos Tremolite 2 M = Matrix I Non-Identified Actinolite NSD = No Structures Detected '

CITY_21MC100_011275003

NYC-WTC_000200580