Alabama Department of Environmental Management Some of Alabama’s certification exams are prescriptive and some are standardized national exams. Grade I Water, Grade IC Wastewater, Grade IV Water and Grade IV Wastewater exams are standard ABC exams. All other exams are prescriptive exams, which means that the exams are developed by ADEM. ADEM does not endorse or formally approve exam trainers. Certification Exam Prep | American Water College Upon completion of this course you will receive a certificate for 3.2 CEUs (32 Contact Hours). More Information Wastewater Treatment Exam Review – Grade 4-5Continuing Education · California