1.   There are fears that groundwater might become contaminated.

2.   The principal cause of the problem, however, was fertilizer run-XXXX off, which contaminated groundwater and led to eutrophication of surface water.

3.   The department found that the company had illegally disposed of used motor oil and allowed oil to contaminate the groundwater.

4.   The tribes say the two huge open pits in the area have poisoned wells, have diminished the flow of streams and may have widely contaminated groundwater.

5.   Those toxins can contaminate groundwater.

6.   Washington contends it has done that, and is now balking at paying for the cleanup of the bases, whose chemicals are contaminating the groundwater.

7.   Ryan said the ban would help corn growers because ethanol is made with corn, and noted that MTBE is suspected of contaminating groundwater in several states.

8.   The pollution includes lead-laden sand and perchloroethylene, a toxic solvent that was dumped there and contaminated the groundwater.

9.   Tires burn easily and for long periods of time, producing dangerous oily liquid that can contaminate groundwater.