NYC-WTC_000228891

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume (liters): 1800 Lab Group #: 7733 Filter Type / Filter Area: MCE 385 mn? Lab Sample #: 2 Grid Opening Size: 0.01124

Client Sample #: 04 Area Examined: 0.04496 mra^

GRID BOX: Magnification: 20,000 GRID ID; Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/13/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or V EDS {Nonadb No F B C M >=05 p :>=5p Chrys Ampfiibole Nonasb AmUig/ND No Coord <5m Elements)

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I Hi Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: Positive diffraefion pattern preperSes conforming to <50% urdissotved filter, overlapped a folded Totals laborato^ identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded oroverapped grid squares <5% F B C M >5m 'i = EDS spectrum conforming to laboratory holes or opaque areas dentificadon criteria observed Chrysotile AMPHIBOLES Amphibole F - Single Fiber Amosite 3 = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster (>3 Intersectons) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-Identified MSO = No Structures Detected

CITY_21MC100_002901851

NYC-WTC_000228891