NYC-WTC_000207213

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count Sheet Client Name; NYC BOE Volume niters); 1920 Lab Group #: 7902 Filter Type / Filter Area: MCE 385 mm^ Lab Sample #; 12 Grid Opening Size; 0.01124 Client Sample #: 12 Area Examined; 0.04496 mm^ GRID BOX: Magnification; 20 000 GRID ID: Accelerating Voltage; 100 KeV # Grid Openings; 4 Analysis Date; 5/30/02

Analysis Performed By; ROMAN PEYSAKHOV

GO. Structure . Structure Type Length' ID of Stnjcture N or V EDS (Nonadb No ■ F B C M >=05 M •Chrys Amphibole Nonasb AmbigflJD No Coord 55m ■ ■ Elements)

s

Struct = > 0.5p >5:1 Aspect Ratio Grid acceptance; >/= Posifive diffraction pattern properties conforming to <50% undissolved filter, overtappeior folded Totals laboratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded orovertappedgridsquares <5% F B C M >5m V= EDS spectrum conforming to laboratory holes or opaque areas identification criteria observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite ’ B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite ' Ambiguous C = Cluster (>3 Intersections) Anthophyllite? Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSD = No Structures Detected

CITY_21MC100_003014813

NYC-WTC_000207213