This catalog serves as a contract between you, the student, and Contra Costa College. That contract is valid as long as you are continuously enrolled.Address, and Phone Number. If you are contacted, please call the Jury Commissioner's office at 925-608-1000. Videos. Answering the Call for Jury Service. Dear WCCUSD Families,. The West Contra Costa Unified School District is a community of learners. This is an educational letter sent to all Kaiser Permanente Medicare health plan members. Thank you for all you do. To provide for the management of the natural resources of the United States, and for other purposes.