Volunteers are invited to attend the annual “Keep it Clean and Green” event at the Wilbur D. May Arboretum at Rancho San Rafael Regional Park, April 9th.  Join the May Arboretum staff, May Arboretum Society and Arboretum volunteers, Rail City Garden Center and News Talk 780 KOH for the Volunteer Spring Cleanup Day. It’s open to all ages and is important for the thousands of visitors who view the County’s public garden every year. The event is from 10 am to 2pm April 9th. Tools, bags and free refreshments will be provided.