Municipal & Industrial Regulations

Revised Risk Assessments Status and Risk Measures

Risk Assessment Risk assessment based on: 1.Biological assessment of receiving waters 2.Assimilative Capacity/Available Dilution – Existing & Future 3.Treatment Plant Capacity – Existing and Future Loads 4.Quality Standards not being met (Bathing Waters & Shellfish Waters)

Overall Point Source Risk Assessments River Water Bodies in SERBD ‘At Risk’ from point sources 115 RWB 18 TraC

High and good status waterbodies “At Risk” from Point Sources High0 Good24 Status & Risk

Less than good status waterbodies “At Risk” from Point Sources Moderate 51 Poor35 Bad 5

Point Source Risk /Measures Schedule A - Sub Pressures & Suggested Measures Sub- PressureMeasures a.Insufficient WWTP Capacity - Ex.LoadingB1, B5, B6, B7, S1 b.Insufficient WWTP Capacity - Fut. LoadingB1, B5, B6, B7, S1, S2 c.Insufficient Assimilative Capacity Ex. Loading (BOD)B1, B3, B4, B5, B6, S4, S7, S10 d.Insufficient Assimilative Capacity Fut.Loading (BOD)B1, B3, B4, B5, B6, S2, S4, S7, S10 e. Insufficient Assimilative Capacity Ex. Loading (nutrients)B3, B4, B8, S4, S5, S7, S10 f. Insufficient Assimilative Capacity Fut.Loading (nutrients)B3, B4, B8, S4, S5, S7, S10 g.D/S Historical Deterioration in Q within 3kmB1, B2, B3, B4, B5, B6, S3, S4, S8 h.D/S Q <4 within 3kmB1, B2, B3, B4, B5, B6, S3, S4, S8 i. Deterioration in Q u/s to d/s within 3km of point dischargeB1, B2, B3, B4, B5, B6, S3, S4, S8 j. Exceedence of Bathing Water Quality and outfall within 1kmS3, S4, S6, S7, S8, S9, S10 k. Exceedence of Shellfish Waters Quality and outfall within 1kmS3, S4, S6, S7, S8, S9, S10

Basic Measures Actions within the basic measures which are not being fully implemented B1.Measures for improved management: Keep register of plant capacity and update annually Install facilities to monitor influent loads and effluent discharges in accordance with EPA guidelines and best practice Put auditable procedures in place to monitor compliance of licensed discharges Implement training procedures for staff involved with licensing of discharges Monitor receiving water quality upstream and downstream of the point of discharge

Basic Measures Actions within the basic measures which are not being fully implemented B2. Optimise the performance of the waste water treatment plant by the implementation of a performance management system B3. Revise existing Section 4 licence conditions and reduce allowable pollution loads B4. Revise existing IP(P)C licence conditions and reduce allowable pollution loads B5. Investigate contributions to the collection system from unlicensed discharges

Basic Measures Actions within the basic measures which are not being fully implemented B6. Investigate contributions to the collection system of specific substances known to impact ecological status resulting from licensed and unlicensed discharges and issue or revise licenses to reduce or remove such specific substances in the discharge B7. Upgrade WWTP to increase capacity B8. Upgrade WWTP to provide nutrient removal treatment

Supplementary Measures S1. Measures intended to reduce loading to WWTP: Limit or cease the direct importation of polluting matter (e.g. liquid wastes, landfill leachate, sludges, etc.) to the treatment plant Investigate the extent of use and impact of under-sink food waste disintegrators (FWDs) and introduce controls where appropriate Investigate fats/oils/grease concentration in influent and take actions to reduce fats/oils/grease entering the collection system

Supplementary Measures S2. Impose development controls where there is insufficient capacity at waste water treatment plants S3. Initiate investigations into characteristics of treated waste water for parameters not presently required to be monitored under the basic measures S4. Initiate research to verify the results of the risk assessment and to determine the impact of the discharge S5. Use decision making tools in the management of point source discharges

Supplementary Measures S6. Install secondary treatment to plants not required to do so under the basic measures S7. Apply a higher standard of treatment S8. Upgrade the WWTP to remove specific substances known to impact on water quality status S9. Install UV or similar type treatment S10. Relocate the point of discharge

Approach to Measures Implement the actions under the basic measures which are not being fully implemented Improve confidence in data Focus on the cause of the pressure before investing in end of pipe solutions Measures which require capital investment to be based on reliable data Supplementary measures only to be considered after the benefits of the basic measures are fully realised

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