The pollution of any Oklahoma waters, including groundwater, has been prohibited by state statute since the early 1900s — well before Koch's waste disposal activity at the refinery.
早在科赫公司精炼厂污水处理活动之前的20世纪初期州法律规定禁止污染州俄克拉荷马水资源,包括地下水。
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The other toxic materials are well enclosed and should pose little risk to users, but they could be released into the air or waterways during manufacture or disposal.