After almost 20 years as president of the Grass Valley and Nevada County Chamber of commerce, Mary Ann VanMeter has announced her retirement effective immediately. “There is never a good time to leave an organization, but after much thought and discussions with my family, I’ve made the decision to move on,” VanMeter said in a statement. Susan Rice, the newly elected chairperson of the chamber’s board of directors, will fulfill VanMeter’s role, with the aide of chamber staff, until a replacement has been selected, said Patti Ingram Spencer, outgoing chairperson of the board. “The executive board will launch a search …