Subsequently, some clean-up work began in 1996. But after a year and a half, despite spending NT $ 200 million (over US $ 6 million), there had been no significant improvement in the groundwater. The concentration of trichloroethylene in the groundwater of the neighborhood was still 1000 times higher than the standard set by the EPA.
1996 年兩家公司開始進行污染整治工作，一年半後發現，即使花了台幣 2 億元，但地下水污染的情形完全沒有改善，廠房鄰近地區的地下水中，三氯乙烯的濃度仍超過環保署飲用水標準的 1,000 倍。