In order to confidently groundwater and soil quality the plan was to test and ensure the quality within Taipei. 17 of the groundwater monitoring system wells in Taipei city were performed chemistry analysis, including W-1, W-2, W-3, W-4, W-5, A00029, A00031, A00067, A00125, A00069, A00079, A00121, A00120, A00178, A00122, A00123, and A00028. Samples were collected twice for W-4 and A00029, and once for others. The other items include pollution investigation of 78 gas stations, 3 sites soil and groundwater verification, monitoring well external appearance patrol every 6 months, polluted site inspections every month, maintenance and abolished monitoring well, investigate soil and groundwater contaminated sites, groundwater and soil education advocacy, and administrative work.

Polluting potential of the gas station, Soil and groundwater pollution