1.   But measuring the effects of legions of garbage trucks or polluted runoff from the stations will not be easy, officials said.

2.   But they have singularly failed to control polluted runoff from more diffuse sources like farms, city streets, even golf courses.

3.   For example, a project might encourage landowners in a large area to prevent polluted runoff from damaging stretches of the river where rare mussels live.

4.   For example, Los Angeles County has established diversions affecting five drains where highly polluted runoff is a problem.

5.   In later phases, cities and developers will be expected to take steps to control polluted runoff.

6.   Instead, it would repeal provisions of the Coastal Zone Management Act, the one law that already allows some states to enforce controls on polluted runoff.

7.   It is destroyed by siltation from stream-side logging and agriculture, and it is poisoned by discharges of sewage, toxic wastes and polluted runoff.

8.   That polluted runoff can cause a variety of health hazards, including gastroenteritis, dysentery and hepatitis.

9.   The new proposal does not move aggressively to control polluted runoff, leaving states to manage that effort mainly by seeking voluntary measures.

10.   The polluted runoff of urban life still reaches the river from thousands of streets and parking lots.