Deviation Analysis Using Applicable Methodologies for Impact Assessment on the Ambient Air Component from Industrial Site in Razgrad, Bulgaria

In completing an Environmental Impact Assessment report for impact assessment on the ambient air component, three methodologies are applicable for drawing up an inventory on an annual basis of the estimated values of the pollutant quantities, emitted from the assessed site. They are the following: 1) AP-42, Compilation of Air Pollutant Emission Factors (EPA - U.S. Environmental Protection Agency) [1]. 2) EMEP/EEA air pollutant emission inventory guidebook (EEA - European Environmental Agency) [2]. 3) Updated unified methodology for inventory of harmful substance emissions in the air, approved by the Bulgarian Ministry of Environment and Water [3]. The paper presents an impact assessment on the ambient air component for a particular site using any of the applicable methodologies. The study focuses on establishing the deviations of the estimated emission values of the emitted pollutants by the various methodologies compared to the actual values of the pollutants specific to the site after putting it into operation. The purpose of the research is to determine the methodology that provides a sufficient degree of certainty for the site's predicted results before putting it into operation and to ensure the ambient air quality in the investment area.