Two main objectives of the present project were to (1) develop the management stragies and support scheme for the national toxic and concerned chemical substances release inventory. This involved screening and assessing the regulations, reporting systems, data verification strategies related to the toxic and concerned chemical substances; (2) check and verify the completeness and accuracy of the reporting data of toxic substance release, strengthening the parameters of the reporting system for the toxic and concerned chemical substances release, providing the interactive training materials and consultant, and conducting error check for the reporting data of toxic substances release. First, information for the compilation and exploration of toxic and concerned chemical substances release inventory,including regulations, reporting systems, data verification strategies and application were reviewed across the United States, Canada, the European Union, Australia, Japan, and United Nations. To develop the management stragies and support scheme for the national toxic and concerned chemical substances release inventory. Two expert consultation meetings were held for the management stragies of the national toxic and concerned chemical substances release inventory and the collaboration between central and local authorities as well as the support scheme for the national toxic and concerned chemical sub-stances release inventory and implementation of reduction and control in high reporting areas. Assessments for reporting and verification systems of the toxic and concerned chemical substances release inventory in the United States, Canada, the European Union,Australia, Japan, and United Nations was completed. To enhancing automated verification aystems based on five inspection criteria and 1,3-butadiene and acrylonitrile, are mentioned as examples. To review and summarize the management tools related to the toxic and concerned chemical substances release data used in both the United States and the European Union. Updating a localized Gaussian-type dispersion model for the Taiwan's risk-screening environmental indicator assessment, with di(2-ethylhexyl) phthalate as an example. Second, to enhance the accuracy of reporting data of the toxic substances release and update the parameters of reporting system for 40 toxic substances release including the utilization of the U.S. WebFIRE and SPECIATE databases. The integration of parameters from the Continuous Emission Monitoring System (CEMS) for air pollution and the Water Pollution Source Control Data Management System were completed. Over 26 million valid parameters from toxic substances release reports between 2016 and 2020 were complied and reviewed for normal value ranges of the reporting system, including the releases of process, wastewater treatment facilities, cooling tower,loading and unloading operation, and storage tanks. These datasets were served as baseline reference data for 1,3-butadiene and acrylonitrile. The instruction manuals and operating videos were completed to improve the reporting system more user-friendly. The validation and consultant for the reporting data of the toxic substances release according to "Guidance for Calculating the Releases of Toxic Substances" in 2020 and 2021. The information documents of the reporting data of the toxic substances release were conducted for public disclosure.

Toxic and concerned chemical substances, Taiwan release inven - tory, TCRI guidance, Confidence interval value, Data verifica - tion and counseling, Information disclosure