The project is about the soil remediation of heavy metals-contaminated farmland Control Site in Chung-Fu areas of Lujhu Township, Taoyuan County. Taoyuan County Government Environmental Protection Bureau (TYEPB) entrusted MWH to carry out the plan. First, it included 11 numbers lands of the Chung-Hing section, which were 131-6,131-7,131-8,148-1,154,154-2,155, 155-2,207,208and No.210-1. The improvement area was approximately 5.6 hectares. The second, , it included 1 numbers lands in the Tai-Tam area of Guanyin Township. The improvement area was approximately 0.28 hectares. The major heavy metals-contaminated of soil were cadmium, the copper, the nickel and the chromium. This plan execution period was from December 5th, 2006 to December 4th, 2007. MWH has carried out this plan and completed all work during the period. This improvement work were divided into five stages, including pre-improvement work, the supplement investigation and design, the soil pollution improvement, the result verification and the farmland reconstruction and restoration. It took soil mixture and dilution method as the improvement way. The main goal after the improvement was to reduce the concentration of soil heavy metal to lower than the Food Crops Farmland Soil Control Standards (Cadmium 5mg/kg; Copper 200mg/kg; Nickel 200mg/kg; Chromium 250mg/kg). By the supervision and verification of TYEPB, the heavy metals concentration of the improvement soil were lower than the Food Crops Farmland Soil Control Standards. MWH had already completed the soil pollution remediation work. According to Soil and Groundwater Pollution Remediation Act Article 20, suggested that TYEPB must announce the removal of controls and restrictions on the Control Site.

Heavy Metals, Soil Pollution Remendiation