There are four major tasks in this two-year project, including: (1)To strengthen the system for the management of incinerator ash in incineration plants, and to promote the reuse of incinerator ash (2)To investigate the disposal and reuse records of incinerator ash and to provide the improvement guidance for the incineration plants in order to reduce the environmental impact (3)To enhance the source management of waste entering into incineration plants and to improve the quality of products made from incinerator ash (4)To assist city and county governments in executing general waste clearance, and to promote the proper management Four major achievements of this project in year 2007 are shown as below: 1.To study and amend relevant ash treatment and reuse management regulations This project compiled the quality, characteristics, management, related regulations, and current implementation status of the reuse of incinerator ash in Taiwan, and analyzed relevant problems and countermeasures. Moreover, this project compiled and analyzed the foreign management policies, inspection technologies, permission system, and reuse and long-term monitoring program for incinerator ash in America, Japan and European Union. In the meantime, this project reviewed the current reuse technologies and management methods and assisted the Environmental Protection Administration (EPA) in drafting the amendment and related legal procedures for the Incinerator Ash Reuse and Management Method, and continuously to assist in the establishment of a three-level quality management system and its supporting measures. The bottom ash sample of No. 255 incineration plant had been selected and tested, based on Toxicity Characteristic Leaching Procedure (TCLP) and Waste Reuse Leaching Procedure adopted in developed countries (California of USA/European Union) respectively. According to the result of the test, a feasibility study had been conducted to evaluate the possibility to apply the waste reuse standard in foreign countries for the incinerator ash reuse management in Taiwan. 2.To carry out the investigation of incinerator ash clearance and reuse in order to control the disposal of incinerator ash and to provide suggestions for improvement From January to November, 2007, the quantity of incinerator ash and its disposal were declared through internet. These reports were also cross-checked with the data declared in Solid Waste Incineration Management System (SWIMS) and Industrial Waste Management System (IWMS) of the EPA to assure the quantity of incinerator ash and its disposal were properly treated and managed. Meanwhile, the Global Position System (GPS) equipped on the vehicles conveying derivatives of fly ash and bottom ash had also been traced. This project performed the site investigation of incineration plants, mid-treatment (solidification) plants, ash landfills, and provided the improvement guidance to the plants or factories with abnormal declaration reports. The monthly report of bottom ash reuse in year 2007 was checked. This project also provided three site investigations and improvement comments to two bottom ash reuse agencies (Kobin, Yinchen) on their operations and the disposal of reuse products. In addition, this project sampled the ash (bottom ash and solidification of fly ash) of No. 255 incineration plant to test concentration of heavy metal leaching and dioxin contents. 3.To analyze pollutant source from ash and to establish the mechanism of prevention from the source This project carried out a detailed analysis for the physical composition of the wastes entering into No. 255 incineration plant. Among which, the contents of lead and cadmium of five typical categories were analyzed. The result was to provide possible impact on the quality of incinerator ash caused from the pollutants in different wastes. The result of this study can be provided as the reference for follow up research on the control items and the execution method of waste management when entering into incineration plant. 4.To assist in the execution and management of landfill yards, bottom ash, and night soil treatment works This project has assisted the EPA in the following activities for county and city governments: *Investigation and control of current status on the proper operations and management of landfill yards for general waste *Monitoring of the execution status and promotion effectiveness of night soil treatment *Provision of professional opinion and administration works to their incineration ash reuse plans and monitoring of their execution status