The Illinois EPA requires that industrial wastewater treatment systems be operated under the direct field supervision of a licensed Class K Operator. If you are located with the Metropolitan Water Reclamation District, they enforce this requirement for all Significant Industrial Users.

To obtain the Class K license, a system operator must pass a certification examination. The Illinois EPA gives the Class K exam several times during the year at various locations.

Class K Examination

The Class K exam includes essay questions that pertain directly to your treatment system, and multiple-choice questions on basic wastewater mathematics.

Essay Section: The essay portion of the exam accounts for 80% of the exam grade. The applicant is required to draw a detailed flow schematic diagram and to answer a variety of questions regarding facility wastewater sources, treatment principles, solids handling procedures, effluent monitoring and reporting requirements, laboratory techniques, record keeping, and more.

Mathematics Section: The math section of the exam is comprised of four questions that account for 20% of the exam grade. These questions cover items such as the calculation of flow rates, treatment efficiencies, and wastewater loadings.

Contact Admiral Environmental Services

Admiral Environmental Services has provided on-site training for the Class K exam for numerous clients. Our experience enables us to provide simple but "custom-tailored" training for your needs.

Also, please visit our website at to obtain additional information regarding District requirements and other environmental reports, including air, waste, Tier II and Form R.

Paul F. Mathews
Environmental Specialist

PS: Please call Admiral to schedule your Class K training, at (847) 228-5355.

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