In order to assess soil and groundwater qualities in the industrial parks, the Environmental Protection Administration (EPA) issued the project “Contamination Source Investigation and Mitigation Plan for Industrial Park of High Contamination Potential (PhaseⅣ)”. Based on the Light Classification Management designated by the EPA, the Linhai industrial park and the Taoyuan Youth industrial park were selected in this project.
In this project, the investigation included two stages. At the first stage, geophysical surveys and geological drilling were conducted within the areas of the above-mentioned industrial parks. At the second stage, questionnaire surveys and interviews with workers were conducted to select the factories with higher pollution potential. A total of 8 sites were selected for further investigation in which geophysical surveys, soil sampling, well installation, and groundwater sampling were subsequently conducted. Based on these results of the two stages, the plumes of contamination and hot spots were identified. Human health risk assessments was conducted in order to ensure the safety of residential water usage. Furthermore, the administrative control measures was also proposed.
According to the investigating results of 8 factories, pollutants of soil and groundwater in 1 factory (○○ Chemical Corporation ) were found to be over the pollution control standards, and pollutants of soil in 4 factories (○○ Steel Corporation, ○○ Co., Ltd., ○○ Steel Entrtprise Co., Ltd. and ○○ Steel & Iron Works Co., Ltd.) were found to be over the standards. The soil pollutants included Cr, Cu, Zn, Ni, Benzene and TPH; the groundwater pollutants included Benzene and Naphthalene. It has been suggested that all the factories listed above be supervised by the Environmental Protection Bureau, according to the Soil and Groundwater Pollution Regulations.
Although according to the health risk assessment the cancer risk and hazard quotient did not exceed the target values within the 2 industrial parks, it is still suggested not to use groundwater for cooling, irrigation,and etc.The Environment Protection Bureau should regulate the usage of groundwater adequately to reduce human exposure from groundwater in the industrial park. Also, to prevent from direct contact of contaminant soil, it is recommended to build isolated pavement. In order to ensure the health and safety of people in the area, it required soil and groundwater monitoring.