(c) The Department may require a system to have a process control plan that includes, as necessary, the following:

1. (1) A flow diagram of the entire treatment process.
2. (2) The identification of individual treatment units by type.
3. (3) A description of the treatment process provided by each treatment unit.
4. (4) The anticipated level of treatment provided by each treatment unit.
5. (5) The normal influent and effluent operating ranges for each wastewater or water treatment unit.
6. (6) A description of the average and seasonal characteristics of the raw water or wastewater influent.
7. (7) Any standard operating procedures.
8. (8) The methods to be utilized to monitor and adjust treatment processes
9. (9) The identification of the key processes and equipment associated with these processes.
10. (10) An outline of how key processes and equipment will be monitored if the system is without staff during daily operations.
11. (11) The trigger parameters for each unit that requires a process control decision.
12. (12) A preventive and emergency maintenance plan for all process control-related equipment including a replacement parts inventory and emergency repair method.
13. (13) The procedures for emergency operations when security has been breached or natural disasters threaten public safety, the environment and property.
14. (14) The wastewater treatment methods and strategies to assure proper treatment during wet weather operations.
15. (15) A plan for wasting, treating and disposing of solids associated with wastewater treatment.

(e) The Department will consider the following criteria when determining whether or not to require a process control plan:

1. (1) The system has a significant history of noncompliance.
2. (2) The system is having difficulty with a new treatment technology.
3. (3) Another unique situation where the development of a process control plan is warranted.