NYC-WTC_000202007

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name: NYCBOE Volumejliters}; 1840 Lab Group #: 7186 f Filter Type / Filter Area; MCE 385 mm’ Lab Sample #: 13 Grid Opening Size: 0.01124 Client Sample #: 13 Area Examined: 0.04496 mm’ GRID B OX : Magnification: 20,000 GRID ID: Accelerating Voltage: 100 KeV # Grid Openings: 4 Analysis Date: 3/24/02 -

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure Structure-Type ■ Length ID of structure N or Y EDS 1 INonadb No, -F B C M. >=05 pi >=5p Ch^s Amphibole Nonasb Ambig/ND No i Coord -no Elements)

> ^,7 if:.-

- - " ! 1 rj-ii Struct = > 0.5p -> 5:1 Aspect Ratio Grid acceptance; ■A Positive dHraction pattern properties conforming to <50% undissolved filter, overlappsd or folded Lot tils laoorEtory Irt + identification criteria J A zj observed ' <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% F G M r ’So •/= EDS spectrum conforming to laboratory holes or opaque areas i identification criteria observed Ciirysotiie i AMPHIBOLES I Amphibole 1 F = Single Fiber I Amosite 4 B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite , i Ambiguous C = Cluster (>3 intersections) 1 Anthophyllite i Non-Asbestos Tremolite i ,M = Matrix ■ Non-Identified Actinolite NSD = No Structures Detected

CIT-f_21MC10 0_0 032699 42

NYC-WTC_000202007