NYC-WTC_000218300

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1920 Lab Group #: 6928 Filter Tvpe, Filter Area: MCE 355 Lab Sample #: 11 Grid Opening Size: 0.01124

Client Sample #: 11 Area Examined: 0,04490

GRID BOX: Maonitl cation: 20.006 GRIDID: ■Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3-4/02 Analysis Performed By: _____ ^2^______

ROMAN PEYSAKHOV

GO. Structure Structure Type Length iO of Structure Nor \ EDS ------------------- ,------- ---------- - —---------------------i , co 3d C No F B ClM >=05 u >=5|J Chrys Ampnicole s Nonasb ) Ambig/NC i No Coord <5u I i Elements)

/f^ .2 erg. V: 4 a ----

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Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance: V- Positive diffraction pattern properties conforming to <50% undissolved filter, overlapped or folded Totals laboratory identification criteria ooserved <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% i F i B ; C , VI ■/ = EDS spectrum conforming to laboratory holes or opaque areas identification cnteria observed Chrysotile I AMPHIBOLES Amphibole | F = Single Fiber Amosite Crocidolite Ambiguous ! B = Bundle (<3 fibers <1 fiber diameter apart C = Cluster (>3 Intersections) Anthophyllite Non-Asbestos i T remolite M = Matrix Actinolite N.^n-Idenlihed : NSD = No Structures Delected

CITY_21MC100_000466258 NYC-WTC_000218300