1.   Also, Coyner said that new rules on leak detection will go into effect in July and that her agency is experimenting with education programs to reduce construction accidents.

2.   Federal regulations do not require pipelines to have leak detection.

3.   They seldom alert owners of leaks, said Tom Young, a professor at the University of California-Davis who is considered an expert in leak detection.

4.   To improve supply, it is increasing abstraction from bore-holes and stepping up leak detection and repair, Humphries said.