You may complete an on-line application at the Contra Costa Human Resources Department at 651 Pine St., 2nd Floor, Martinez, CA 94553. Contra Costa College Procedures Handbook.All college policies and procedures are recorded in the Colleges Procedures Handbook. The employee shall specify the effective date of resignation. 1. The Governing Board or its designee shall accept the resignation and affix its effective date. If you choose to prepare the document yourself, you may purchase forms at many stationery stores or online. 1 shall be included in the West Contra Costa.