By BRENT MARTINSt. Joseph PostBuchanan County voters will decide today whether to extend the sales tax that pays for much of the county ambulance service.The quarter-cent emergency ambulance service expires at the end of the year. Buchanan County EMS is asking voters to approve a 20-year extension.Field Operations Director Steve Groshong says the tax is vital to funding the ambulance service."So, the county collects a quarter-cent sales tax, which basically covers probably about 45% of our expenses," Groshong tells host Barry Birr on the KFEQ Hotline. "We make up the rest of that with fees for re-insurance, fees for service." Medicare and Medicaid reimbursement provides much of the ambulance funding. Fees and insurance reimbursement provides some of the money to keep the ambulances running.Buchanan County EMS Executive Director Wally Patrick says new technology and training is always required to keep the district up to date and he worries voters might take the servi