Improvement of the emission inventory for reactive organic gases and oxides of nitrogen in the South Coast Air Basin. Volume 1. Main report. Final report

The purpose of the study was to improve the quality of the 1979 South Coast Air Basin emission inventory for reactive organic gases and nitrogen oxides. The technical approach included: (1) a review of existing inventory data to identify emission source categories and reactive species most likely to cause uncertainty in predicted photochemical ozone concentrations; (2) a field survey and testing program that provided basic data and information for revising the 1979 inventory; and (3) the generation of an improved ROG and NOx inventory for the SOCAB that was compatible with the modeling emission data format. Changes to the inventory were within the overall estimated variation for typical inventory emission totals. Based on the study, the 1979 total inventory of TOG and NOx emissions was found to be a reasonably accurate representation of the actual basin-wide inventory. Significant changes to both individual source and source category emissions and to ROG speciation were made during the study.