11.   Those will go on concrete pads, surrounded by razor wire, motion detectors and armed guards.

12.   Until he saw Sims lying on the concrete pad, Clines had no real idea exactly what was happening.

13.   All that remains is a concrete pad.

14.   It also has agreed to build an additional concrete pad to collect the chemicals and to step up monitoring of the streams.

15.   Workers are busy filling trenches, draining some areas and covering others with concrete pads so they can weather the coming years of neglect.