| 英文摘要 |
In order to improve the soil quality of contaminated farmlands in Tainan, this project prioritized shallow, medium and low pollution farmlands with confirmed pollution ranges based on the results of the investigation of " The Project of Supervision and Verification on Restricted Farmlands in Tainan City " And finally lifting site restriction to revitalize and reuse the land in various ways, so as to achieve the goal of sustainable land use and maintenance of people's health. According to the investigation results, there were 14 lands selected to implement remediation measures in this project. The total area of restricted lands was 10,847.4 square meters. The pollutants were mainly the heavy metal copper and zinc. The depth of contamination was within 1 meter and some area reaching 2.5 meters. The source of contamination was belonged to waste pollution rather than the type of paddy field pollution, which related to the characteristics of industry in this region in few decades ago. Among the 14 selected land, 6 lands were implemented by removing contaminated soil and fill uncontaminated one, and the remaining 8 lands were implemented by soil dilution. The total implemented area is about 1,942.3 square meters. The amount of total removed and filled soil were about 1,774.21 tons (1,281.38 cubic meters) and 1,300 cubic meters, respectively. The amount of cement blocks, red bricks and domestic waste were found within 1.5 meters depth during excavation in the land Tong'an628, which was also the main soil contamination depth. There was some domestic waste within the land junction of Tong'an118 and Tong'an124. No landfill waste was found in other farmlands. After the remediation measures, the self-verification was carried out. The concentration of heavy metal in 11 farmlands was lower than the agricultural soil pollution monitoring standard. The concentration of heavy metal in 3 non-agricultural lands was lower than the soil pollution monitoring standard. The results of verification in these 14 lands were all passed in self-verification and third-party-verification. Therefore the restriction of these 14 lands with total area 10,847.4 square meters could be lifted. This project also investigated the intention of landowner to install solar photovoltaic facility and assessed the benefit. Most landowners have no intention to install solar photovoltaic facility with some reasons, including planning for farming or other planning, rent considerations and long lease term. On the other hand, this project assessed the fee that the supplier of solar photovoltaic facility should pay in two patterns.
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