During that time, the disposal of toxic materials caused contamination of local groundwater.

Casper Creek and the local groundwater are also being harmed, the suit said.

Not surprisingly, this washed into the soil and hence into local groundwater.

The main threat to its existence is loss of local groundwater.

Also, because of the subsurface detonation, radioactive debris may contaminate the local groundwater.

The cleanup cost $16.2 million and wound up contaminating local groundwater anyway.

In 1972, after it became apparent that the pits were leaking into local groundwater, Stringfellow shut down the site.

And the site, which still has not been cleaned up, may be leaking contaminants into local groundwater.

Contamination of local groundwater has yet to be addressed.

Opponents say it was too large of a threat to local groundwater.