The main work of this project included: (1) revising the procedure of the planning and establishment of early warning groundwater monitoring well networks for industrial parks; (2) assessing the efficiencies of the existing monitoring resources of the selected high potential polluted industrial parks based on the results of the Environmental Protection Administration’s light classification and polluted potential estimation of industrial parks, establishing the early warning groundwater monitoring well networks and carrying out the groundwater investigation; (3) proposing the recommendations of classified monitoring management, pollution investigation and verification and response measures according to the results of the groundwater investigation as well as carrying out the additional investigation for groundwater pollution. Firstly, the modification of the vertical pollution transportation and the mechanism of investigation in advance were brought into the procedure of the planning and establishment of early warning groundwater monitoring well networks. Regarding the classified monitoring management of the well networks, the local environmental protection bureau may adjust the monitoring quantities and frequencies based on the groundwater quality of the industrial parks as well as their budget application. It was recommended that the groundwater monitoring wells with abnormal monitoring results and their surrounding wells should be chosen to be intensively monitored especially for the concerned pollutant items and the overall items listed in the pollution control standards should be tested once in every 2 years, as well. In this phase, the additional investigation were implemented for the industrial parks which were investigated in the first-phase project, including Jhongli, Nangang, Linyuan, Hsinchu Science Park, Taichung Export Processing Zone and Nantze Export Processing Zone, to complement the breach of the groundwater flow field and amend the well networks allocation by establishing or including groundwater wells. Besides, this project assisted the local environmental protection bureau in regularly monitoring the groundwater quality of the monitoring wells with abnormal monitoring results in the first-phase project. Among the selected industrial parks, the pollutant concentrations of the early warning monitoring wells in Jhongli Industrial Park and Nantze Export Processing Zone continuously exceeded the pollution control standards. Secondly, Shulin, Dayuan, Kuangin, Taoyuan Youth, Yongkang, Linhai, Taichung Youth, Minsyong, and Tafa industrial parks were selected to establish the early warning groundwater monitoring well networks in this project. A total of 60 newly-established monitoring wells and 25 existing wells were included in the planning of early warning groundwater monitoring well networks. The effective monitoring efficiency for each networks ranged from 81.6 to 91.4%. All the monitoring area of each well network was capable of covering all known contaminated hot spots. The groundwater sampling results indicated that Taoyuan Youth Industrial Park had trichloroethylene detected over the pollution control standard; Nickel was detected in Taichung Youth Industrial Park; Vinyl chloride was detected in Linhai Industrial Park. The percentage of the monitoring wells with the regulatory-listed pollutant item detected was 29% (25/85). Thirdly, this project conducted additional pollution investigation activities in Taoyuan Youth Industrial Park to evaluate the scope and extent of the contamination and established one more groundwater monitoring well to amend the well networks. The additional investigation for Taichung Youth and Linhai Industrial Parks will be carried out in the next phase of the project. In addition, according to the investigation results of each industrial park, Taoyuan Youth, Linhai and Taichung Youth Industrial Parks were graded the first level owing to their pollutant concentrations exceeding the pollution control standards and the concerned pollutant items shall be tested twice a year at least. Shulin, Dayuan, Yongkang and Minsyong Industrial Parks were graded the third level and the concerned pollutant items should be tested once a year. Kuangin and Tafa Industrial Parks were graded the fourth level and the overall pollutant items listed in the regulatory pollution control standards should be tested once in every 2 years. Finally, this project also proposed the recommendation of response measures and additional activities that should be taken by the environmental protection agencies and the industry competent authorities for future enforcement references.

industrial park, early warning groundwater monitoring well networks;Contaminant transport simulation