About Douglas E. Oliver, DDS Dr. Douglas Oliver opened his practice in 1987. We are located just north of Berkeley and serve patients from the Pinole, El Sobrante, Hercules, and Vallejo areas. You’re Family to Us At our friendly, open-air office, we will treat you like you’re a member of the family. We pride ourselves on presenting you with your care options, discussing which are right for you, and being up-front about what each procedure involves, including costs. We are happy to answer all of your questions so you will feel comfortable making any decisions you need to make about your dental health. You’re always shown the utmost respect, and we want you to be a patient with us for years to come.