Persons offering service as a certified hydrogeologist on work requiring certification by state law or local ordinances. Fees: Application: $250 Examination: $100 License: $67.50 Examination Frequency: Once a year, in fall. Exam Locations: Southern or Northern California. Experience Requirement: Licensed Geologist with 5 years hydrogeology experience under the supervision of a Certified Hydrogeologist. Average Time to Process Application: 3 months. Renewal Period: Biennially (every second year). Special License Requirements: Must be a licensed Professional Geologist in California to take examination. Comments: N/A Authority: Business and Professions Code, Chapter 12.5. California Code of Regulations, Title 16, Chapter 29.