This study focuses on the identification, classification and encoding of hazardous generating wastes in the greatest Middle East oil unit- National Iranian South Oil Company (NISOC)-, for a comprehensive management of the hazardous and non-hazardous wastes in one the Karun Oil and Gas production plants in Ahvaz, on RCRA basis. The results of this first-time-ever-accomplished research in Iran which were derived from 154-test questionnaire analysis, manual and AutoCAD drawings of units and standardized experiments, show that, there are identified chemicals in wastes; after being compared with 8 lists of hazardous materials, international standard and the number of materials found in the checklist. In general, 33 sorts of poisonous hazardous wastes, 5 sorts of nonhazardous materials and 25 sorts of the naturally unknown as hazardous wastes were detected in which, 3 sorts of them laid in acute hazardous wastes checklist, 4 in poisonous hazardous wastes, again 4 in hazardous wastes derived from specific resources, preferred toxic hazardous wastes, 6 in the United States Environmental Protection Agency checklist and 10 in toxic materials according to TCLP and EP test. 6 toxic groups contain heavy metals such as: Nickel, Lead, Zinc, Copper, Chromium and Cadmium. The centrifugation; as a conclusion, is the best possible economical method to treat the waste waters, and bioremediation; is the best possible economical method to treat the polluted soils thorough hazardous materials.
