Emission calculations are the foundation of most environmental assessments. Before a facility can evaluate the impact of regulatory requirements on its current and future operations, it must first quantify the amount of its criteria, toxic, or green house gas emissions. It may also have to report these emissions to a regulatory agency in a specified format as well as maintain sufficient documentation to support its estimates and withstand an audit. Our staff has prepared emission inventories for a wide variety of industries including petroleum refining and marketing facilities, aerospace, manufacturing, fumigation, pulp and paper mills, and electric utilities. Verdant also uses data management tools for cost-effective data manipulation and reporting and Geographic Information Systems (GIS) to display data.