Tmdl schedule and workplans status july 1999



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Additional Work Needed:

The spatial distribution, chemistry, mobility, and bioavailability of mercury-laden sediments in Tomales Bay and Walker Creek need to be determined. In addition, work is needed in order to refine our understanding of causality: where and how mercury present in the system becomes a bioaccumulation problem.




  • Develop and implement watershed monitoring and assessment plan to verify historical and present localized sources (i.e., mines).

Year One

1/4?PY

$35,000 contracts

Year Two

1/4?PY

$40,000 contracts

  • Evaluate the mobility and bioavailability of mercury-laden sediments

Year Two

1/4?PY

$25,000 contracts

Year Two

Year Three






U.S. F.W.S. study (pending)

Year Two

1/4?PY.

$25,000 contracts

Year Three

1/4?PY

$15,000 contracts




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