The project was to improve the heavy metal polluted restricted farmlands in Taoyuan. The remediation measures including soil exchange method and soil dilution method, and the former was mainly one. Aforementioned 96 farmlands were located in Pingjhen district and Dayuan district. By the end of this project, tasks that were finished included (1) submitting a work plan, off-site treatment plan, monthly performance reports, daily activity logs, and progress reports, (2) holding discussions for farmers and landholders, (3) re-confirming the degree of heavy metal pollution of farmlands, (4) carrying site remediation by soil exchange and dilution method, self-verification, third-party-verification, fertilization, and finally (5) lifting site restriction. All work was conducted according to the contract. Besides, Taoyuan City Environment Protection Department (TYEPB) also held discussions at regular intervals to know well the work. Moreover, to avoid abnormal use of the restricted farmlands, we went around and inspected once two month. The achievements of this project included (1) re-confirming the degree of heavy metal pollution on 96 polluted farmlands. (2) holding 1 terms of discussions for farmers and landholders. (3) submitting off-site treatment plan. (4) analyzing soil fertility for 96 farmlands. (5) environmental monitoring from fourth quarter of 2017 to first quarter of 2018. (6) excavating soil for 9,593.44 tons and filling non-polluted soil for 9,597.49 tons. (7) carrying site remediation on 96 numbers (13.3275 hectares) by soil exchange and dilution method. (8) passing self-verification, third-party-verification for 96 numbers of farmlands. (9) recovering soil fertility for 96 numbers of farmlands.

Heavy metal pollution, Soil dilution method, Remediation of polluted farmlands