ABSTRACT
The ambient data obtained during airbourne toxic element and organic substance are some of the most extensive to date in terms of the variables, sites, number of days, and seasons sampled. Models provide the information necessary to assist in the resolution of nonattainment situations for regulated air pollutants. They are also an aid in the identification of sources of nonregulated airborne substances that may impact the health of the general population. Receptor models estimate source contributions by analyzing relationships between airborne pollutants measured at a sampling or receptor site. Source apportionment models for inhalable particulate matter (IPM) in Elizabeth were developed following the factor analysis/multiple regression methodology used in Newark. Analysis of the IPM model daily residuals showed a pattern similar to that found in the Newark model. Modeling of extractable organic matter (EOM) sources presents unique difficulties. Fractions of urban EOM have also been shown to induce tumors and act as promoters in in vivo tests.
