A Vacaville restaurant is being investigated by the Solano County Health Department after reports of Hepatitis A outbreak.  Five customers became sick after eating at BJ's Brewhouse in mid-January of this year.  Their symptoms included fever, vomiting, and diarrhea. No workers at the restaurant tested positive for the disease.  Health officials say the incubation period has passed.  Dr. Ronald Chapman, Solano County Health Director, encourages everyone to wash their hands and be careful with all types of food preparation