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...Ambient air sampling for particulate mattersampling matter robert w vanderpoolrobert vanderpool human exposure and atmospheric sciences divisiondivision office of research developmentand development uuuu ssss envir enviroooonmnmeeeenntatatatal prl protectotectotectotectiioooon an agggegeeenncccycyyy triangle park ncnc agriculturalagriculturalagriculturalagricultural airairairair qqqualityqualityualityuality tttasktaskaskask forceforceforceforce meetingmeetingmeetingmeeting september presentation outline background statement issues characteristics aerosols sources size ranges definitions mmd gsd aerodynamic diameter sizesize selectiveselective mmeasurementeasurement techniquestechniques inertialinertial impactorsimpactors aandnd cyclones cutpoint slope developmentdevelopment ofof healthhealth basedbased pmpm standardsstandards physiologicalphysiological basis pm conventions epa s method review tamu methodology estimating true concentrations oversampling reference methods backgground to ...