Two incumbents are campaigning to serve for a short, two-year post on the Tomales Village Community Service District board. Eric Knudsen is running against Sue Sims for the seat to which Ms. Sims was appointed to fill a vacancy. Mr. Knudsen, a chemist, reached the end of his four-year term, and says he plans to retire in two years. Formed in 1998, the community service district manages the town’s wastewater treatment and maintains the community…