NYC-WTC_000223824

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume (liters): 1928 I Lab Group #: 7658 Filter Type / Filter Area: MCE 385 mm- Lab Sample #: 7 Grid Opening Size: 0.01124 Client Sample #: 07 Area Examined: 0.04496 mm-

GRID BOX: /M Magnification: 20,000 GRID ID : # Grid Openings: F Accelerating Voltage: Analysis Date: 100 KeV 5/6/02

Analysis Performed By: ROMAN PEYSAKHOV

GO. Structure Structure Type Length ID of Structure N or \ j EDS No F B C M >=Q5p :>=5p Chrys Amphibole Nonasb No Coord <5p i Elements)

f/

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Struct = >0.5p >5:1 Aspect Ratio Grid acceptance: 4= Positive diffraction pattern properties conforming to <50% undissolved filtef. overlapped or folded Totals laboratory identification criteria observed <10% paniculate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F B C I M ; >5u '/= EOS spectrum conforming to laboratory holes or opaque areas idenlification criteria observed Chrysotile amphiboles Amphibole F = Single Fiber Amosite B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous I I C = Cluster (>3 Intersections! Anthophyllite Non-Asbestos ! M = Matnx Tremolite Non-Identified i U4 Actinolite NSO = No Structures Detected

CITY_21MC100_0 02919990

NYC-WTC_000223824