Sonoma County’s Board of Supervisors are poised to add two tax measures to the November ballot. Expected to be forwarded at their weekly board meeting tomorrow, the first is a quarter-cent sales tax would collect $25 million over the next ten years for the benefit of mental health and homeless services. This would be a second formal vote. The 2nd measure would be a renewal of a quarter-cent sales tax for transportation and road improvements. Recent polling suggests strong support for both measures showing 71% of likely county voters would support the measures. Some leading business groups oppose the move.