This document describes a methodology for projecting and allocating pollutant-specific emissions to areas that are smaller than counties. Three Orders of analysis requiring successively more detailed data and more extensive levels of effort are treated. The techniques advanced rely upon the development of demographic and economic projections that are used as surrogates to forecast source-specific emissions resulting from residential fuel combustion, transportation, commercial and institutional fuel combustion, industrial processing and fuel combustion, and solid waste incineration. Procedures for allocating emissions to large subcounty areas (e.g., municipalities, townships, census tracts and/or regional planning activities, etc.) are treated first. Total emissions from each source are then apportioned to square cells in a master grid system. Emissions allocated to these cells in a master grid system are the final output of this technique and can be used as input for the purpose of modeling air quality. Appendices A and B illustrate a test of these procedures applied to Fulton County (Atlanta), Georgia. Portions of this document are not fully legible.

Energy and Environmental Systems Division, Argonne National Laboratory "November 1974." Final report. "EPA-450/4-74-014." "OAQPS Guideline Series."