Of those, 394 were in opposition, nine were in support, and one was neutral. In their decision, the commissioners said concerns about water quality played a big part. “Primarily, we have concluded that the risks and potential risks to groundwater contamination and contamination of drinking water supplies down-gradient of the site are unacceptable. “If these risks eventuate, we are concerned about the consequences, particularly for the Rangiora backup community supply options. “Any contamination would likely remove the backup community drinking water supply for Rangiora for an extended period of time.” JOHN KIRK-ANDERSON/STUFF Protesters have united against a proposed quarry at North Canterbury's Rangiora Racecourse. (Video first published December 2020).