NYC-WTC_000228971

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYC BOE Volume filters): 1800 Lab Group #; 7788 Filter Type / Filter Area; MCE 385 mm- Lab Sample #: 15 Grid Opening Size: 0.01124 Client Sample #: 18 Area Examined: 0.04496

GRID BOX: Magnification: 20,000 GRIDID: Accelerating Voltage: too KeV # Grid Openings: 4 Analysis Date: 5/18/02 Analysis Performed By: /CZ

ROMAN PEYSAKHOV

GO. Structure Structure T/pe Length ID of structure N or v EDS (Nonadb ' No F 8 C >=05 p >=5p Chrys Amphibole Nonasb Ambig/ND No Coord I Elerrants) I <5p

erg If 7f ^/3=

Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance: 'i- Positive diffraction pattern properties conforming to <50% ufidtssQlved filler, overapped or folded Totals 13borato7 identification criteria observed < 10% particulate coverage >50% coverage ale least 20 unfolded or oveilapped grid squares <5% F B C 'J= EDS Spectrum confOTiirgtoiaboratory holes or opaque areas dentification criteria observed Chrysotile AMPHIBOLES Amphiboie F = Single Fiber Amosite a = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous C = Cluster j>3 Intersections) Anthophyllite Non-Asbestos Tremolite M = Matrix Actinolite Non-ldentified USD = No Structures Detected

CITY_21MC100_002901984

NYC-WTC_000228971