IPR SWTPs shall incorporate design elements that demonstrate the ability to consistently provide for protection of public health and the environment (reliability); provide sufficient treatment units and monitoring systems necessary to meet treatment and performance goals (redundancy); provide multiple barriers and demonstrate the ability to address a broad variety of parameters (robustness); and demonstrate the ability to withstand and recover from treatment upsets (resilience).
Okla. Admin. Code § 252:628-5-3