Find the best employment attorney serving Contra Costa County. "EMPLOYMENT LIST" means a list of names of persons who have been found qualified for employment in a specific class. 109.If you have questions about labor law, just pick up the phone and call1-888-599-7645. The hotline is staffed Monday-Friday from am to 5 pm. How to Apply for a County Business License. 1. Determine Whether Your Business is Located Inside or Outside the Unincorporated Areas of Contra Costa County. A business license will be mailed to the business address after the application is processed. Allow up to two weeks to receive your license.