California Hospital Medical Center. Adult Volunteer Application Packet.➢ Obtaining a Volunteer Badge: A volunteer must successfully complete the background investigation and onboarding process before securing a badge. You must also successfully complete all new volunteer paperwork, including verification of your legal right to work in the United States of America. After reading through this agreement, you'll be able to: • Discuss expectations for professional behavior. Indicate if duties will include any of the following: Travel. Volunteer service at California Hospital Medical Center is given on a regular, recurring basis. Volunteers must commit to six months of volunteering usually done in one or two 4 hour shifts per week. To commit to 100 hours to be done in no less than six consecutive months of service on the same day and time each week. Staff → Forms → Volunteer Packet.