This paper presents the environmental radiation risk assessment based on two software program approaches ERICA Tool (version 1.2) and RESRAD BIOTA (version 1.5) to estimate dose rates to terrestrial biota in the area around the largest coal fired power plant in Serbia. (RESRAD) computer code Version 6.2. RESRAD, following the RAGS methodology, calculates the total excess cancer risk (i.e., the risk of persons developing cancer as the result of exposure to site contaminants) from radiological constituents to a particular receptor, for all applicable exposure pathways. The Assessment Manuals are updated with current International Commission on Radiological Protection (ICRP) dosimetry models (i.e., ICRP 60 series) and dose coefficients. The FRPCC also encourages the use of computational tools such as DOE's Turbo FRMAC, RESRAD RDD and NRC's RASCAL or other appropriate tools and methods to implement the PAGs. assessments were performed using the RESidual RADioactivity (RESRAD) computer software, version 5.82 (Yu et al. 1993a). 2.1 DATA EVALUATION Data sets used for the evaluation of reasonable maximum exposure concentrations were taken from five sources: the Radiological Survey of the Seaway Industrial Park Tonawanda, New The RESRAD code was developed with funding from the U.S. Department of Energy and U.S. Nuclear Regulatory Commission. 7.2. a Based on 0.01 mrem/h, 2,000 h/yr. TENORM Disposal ptions in North Dakota RESRAD-OFFSITE is an extension of the RESRAD-ONSITE computer code that was developed to estimate the radiological consequences to individuals located onsite or outside the area of primary contamination. The total primary area contaminated by the mine tailings was estimated to be 16 km 2 and is assumed to be a uniformly distributed layer of soil Manual No. 1110-35-1 1 July 2005 Engineering and Design MANAGEMENT GUIDELINES FOR WORKING WITH RADIOACTIVE AND MIXED WASTE 1. Purpose. This engineer manual (EM) contains planning and management guidelines