06-096 C.M.R. ch. 570, § 5 - Nine minimum controls (NMC)

The licensee must implement the following nine minimum controls (NMC), developed by EPA, that can be beneficially and practically implemented as determined by the department.

A. Operation and maintenance. Proper operation of and regular maintenance programs for the sewer system and CSO outfalls.

B. System storage. Maximum use of the collection system for storage.

C. Pretreatment. Review and modification of pretreatment requirements to ensure that CSO impacts are minimized.

D. Flow maximization. Maximization of flow to the publicly owned treatment works (POTW) for treatment.

E. No dry weather CSOs. Elimination of CSOs during dry weather.

F. Solids and floatables control. Low cost control of solid and floatable materials in CSOs.

G. Pollution prevention. Pollution prevention programs to reduce contaminates in CSOs.

H. Public notification. Public notification to ensure adequate knowledge of CSO occurrences and CSO impacts.

I. Monitoring. Monitoring to characterize CSO impacts and the effectiveness of CSO controls.

NOTE: For guidance see EPA's CSO Guidance for Nine Minimum Controls, dated May, 1995, which more fully describes the nine minimum controls.

Notes

06-096 C.M.R. ch. 570, § 5