Quality assurance audits were performed covering emission inventories for volatile organic compounds and oxides of nitrogen in the State of New Jersey and in a portion of the State of New York comprising the counties of Rockland, Westchester, Nassau, Suffolk, Bronx, New York, Queens, Kings and Richmond. Point source listings were compared with EPA's RACT directory and with State Industrial Directories to compile lists of possibly missing point sources. Methodology involved in segregating point and area sources, in estimating emissions and in seasonal adjustment of the inventories to a typical summer-day basis was reviewed. Area source categories and the methodologies and apportioning factors applied to them were reviewed. Results are extensively tabulated.