Source apportionment: findings from the U.S. Supersites Program.

Data and metadata reporting standards for the U.S. Environmental Protection Agency's PM Supersites Research Program.

The EPA Supersites Research Program needs consistency of metadata and data structures to facilitate information sharing among investigators, analysts, and ultimately secondary data users. Under the auspices of NARSTO a successful mechanism was created to develop and implement reporting standards. The development effort included working closely with Supersites data coordinators, investigators, a...

Comparison Analysis of Particulate Matters in a Micro Environment

Different approaches of source apportionment of dust fractions have been reported world-over. Predicting source categories within receptor chemical profiles using regression and factor analysis using PCA has been reported to evaluate possible source/routes of air pollution mass. The present study is focused on the application of all three approaches to investigate higher degrees of significance...

A Multi-Metric Index for Hydrocarbons Source Apportionment

Several studies have been conducted to develop more accurate and precise indices for hydrocarbons source apportionment. The present study, however, develops a new multi-metric index for hydrocarbons source apportionment. It measures Poly Aromatic Hydrocarbons (PAHs) concentration at six stations with well known petrogenic origin, calculating Phe/An, Flu/Py, Chr/BaA, BaA/Chr, An/(An+Ph), Flu/(Fl...

Employee Job Autonomy and Control in a Restructured Extension Organization

This descriptive cross sectional census study identified the perceptions of Extension and Outreach employees of Iowa State University in the United States about job autonomy and control after two years of a major restructuring. Employees perceived autonomy and control over expressing views and ideas about their work and spending time on the job but perceived little influence over budget allocat...

Special issue of Atmospheric Environment on findings fromEPAâ•Žs Particulate Matter Supersites Program