(NapaValleyRegister) - Napa Valley Think Tank, a St. Helena wine laboratory and resource center, closed Nov. 11. The business opened in August 2010, offering analytical wine testing services, winemaking supplies and tools for Napa Valley winemakers. In addition, Napa Valley Think Tank hosted seminars and offered other technical services such as trials, blendings and tastings. In recent months, the business had hired a number of new employees and received ISO certification. Napa Valley Think Tank had eight employees, said managing partner and founder Andy Erickson.