Annual Environmental Report 2017

Transcription

1 Annual Environmental Report 2017 Agglomeration Name: Bantry Licence Register No. D

2 Contents Section 1. Executive Summary and Introduction to the 2017 AER Summary Report on Section 2. Monitoring Reports Summary Summary report on monthly influent monitoring - WWTP Summary report on monthly influent monitoring - WWTP 2Error! Bookmark not defined. 2.1 Summary report on monthly influent monitoring - WWTP 3Error! Bookmark not defined. 2.2 Discharges from the agglomeration - WWTP Discharges from the agglomeration - WWTP Discharges from the agglomeration - WWTP Ambient Monitoring Summary Pollutant Release and Transfer Register (PRTR) - report for previous year 8 Section 3. Operational Reports Summary Treatment Efficiency Report - WWTP Treatment Efficiency Report - WWTP 2 Error! Bookmark not defined. 3.1 Treatment Efficiency Report - WWTP 3 Error! Bookmark not defined. 3.2 Treatment Capacity Report - WWTP Treatment Capacity Report - WWTP 2 Error! Bookmark not defined. 3.2 Treatment Capacity Report - WWTP 3 Error! Bookmark not defined. 3.3 Extent of Agglomeration Summary Report Complaints Summary Reported Incidents Summary Sludge / Other inputs to the WWTPs 13 Section 4. Infrastructure Assessments and Programme of Improvements Storm water overflow identification and inspection report Report on progress made and proposals being developed to meet the improvement programme requirements. 15 Section 5. Licence Specific Reports Priority Substances Assessment 18 Section 6. Certification and Sign Off 19 Section 7. Appendices 20 Appendix 7.1 Statement of Measures / Improvement Programme 20 Appendix 7.2 Ambient Monitoring 21 2

3 Section 1. Executive Summary and Introduction to the 2017 AER 1.1 Summary Report on 2017 This Annual Environmental Report has been prepared for D , Bantry, in County Cork, in accordance with the requirements of the wastewater discharge licence for the agglomeration. The agglomeration is served by 1 wastewater treatment plant with Plant Capacity PE of 6000 and has 2no. secondary discharge points within the network. The treatment processes include the following:- WWTP Preliminary Treatment (screening & grit removal) Primary Treatment (primary settling tank and primary sludge holding tank are currently by-passed & are available if & when required at the WWTP) Secondary Treatment (conventional activated sludge) Nutrient Removal (Ferric Dosing for phosphorous removal) Tertiary Treatment (UV filter) The final effluent from the Primary Discharge Point was compliant with the Emission Limit Values in The final effluent from SW2 was non-compliant with the Emission Limit Values in The following parameters at WWTP 2 exceeded the emission limit values in 2017:- TSS The final effluent from SW3 was non-compliant with the Emission Limit Values in ,630kgs sludge as dewatered cake was removed from the wastewater treatment plants in Sludge was transferred to and Enva Ireland - Portlaw, Co Waterford There were no major capital or operational changes undertaken in An Annual Statement of Measures is included in Appendix

4 Section 2. Monitoring Reports Summary 2.1 Summary report on monthly influent monitoring - WWTP Table 2.1 Influent Monitoring Summary - WWTP Monthly Influent Monitoring BOD (mg / l) COD (mg / l) SS (mg / l) Hydraulic Loading (m3/d) Number of Samples Annual Max ,680 Annual Mean , Other inputs in the form of sludge/leachate are added to the WWTP after the influent monitoring point and are therefore not represented by influent monitoring. Other inputs, where relevant, are detailed in Section 3.6. Significance of results The annual mean hydraulic loading is less than the peak Treatment Plant Capacity as detailed further in Section 3.2 The annual maximum hydraulic loading is greater than the peak Treatment Plant Capacity as detailed further in Section 3.2. The design of the wastewater treatment plant allows for peak values and therefore the peak loads have not impacted on compliant with Emission Limit Values 4

5 2.2 Discharges from the agglomeration - WWTP Table Effluent Monitoring - WWTP Effluent Monitoring BOD Summary COD TSS Ortho P / MRP ph (Range) WWDL ELV (Schedule A) to 9 where applicable ELV with Condition to 9 Interpretation included % Reduction (Schedule A) N/A N/A N/A N/A N/A Number of sample results Number of sample results above WWDL ELV Number of sample results above ELV with Condition 2 Interpretation Annual Mean (for parameters where a mean ELV applies) Overall Compliance (Pass/Fail) N/A N/A N/A N/A N/A Pass Pass Pass Pass Pass Significance of results The WWTP was compliant with the ELV's set in the wastewater discharge licence. 5

6 2.2 Discharges from the agglomeration - SW2 Table Effluent Monitoring - WWTP Effluent Monitoring Summary BOD COD TSS WWDL ELV (Schedule A) where applicable ELV with Condition Interpretation included % Reduction (Schedule A) N/A N/A N/A Number of sample results Number of sample results above WWDL ELV Number of sample results above ELV with Condition 2 Interpretation Annual Mean (for N/A N/A N/A parameters where a mean ELV applies) Overall Compliance (Pass/Fail) Pass Pass Fail Significance of results The WWTP was non-compliant with the ELV's set in the wastewater discharge licence. One sample was noncompliant with the ELVs in relation to TSS. The non-compliance is due to civil works being carried out new the outfall which raised the SS in the discharge. The impact on receiving waters is assessed further in Section

7 2.2 Discharges from the agglomeration - SW3 Table Effluent Monitoring - WWTP Effluent Monitoring Summary BOD COD TSS WWDL ELV (Schedule A) where applicable ELV with Condition Interpretation included % Reduction (Schedule A) N/A N/A N/A Number of sample results Number of sample results above WWDL ELV Number of sample results above ELV with Condition 2 Interpretation Annual Mean (for N/A N/A N/A parameters where a mean ELV applies) Overall Compliance (Pass/Fail) Pass Pass Pass Significance of results The WWTP was compliant with the ELV's set in the wastewater discharge licence. 7

8 2.3 Ambient Monitoring Summary Table 2.3. Ambient Monitoring Report Summary Table Ambient Monitoring Point from Irish Grid EPA Feature Bathing Drinking FWPM Shellfish Current WFD Status WWDL (or as agreed with EPA) Reference Coding Tool code Water Water Upstream Monitoring Point N/A N/A N/A Downstream Monitoring Point E:96860, N:48066 IE_SW_170_0100 No No No Good Table Ambient Impact Assessment Table Ambient Monitoring Point from WWDL (or as agreed with EPA) Current WFD Status cbod 0-Phosphate (as P) Ammonia (as N) Upstream Monitoring Point N/A N/A N/A N/A Downstream Monitoring Point Good N/A Difference between Upstream N/A N/A N/A and Downstream EQS % of Eqs N/A N/A N/A The results for the upstream and downstream monitoring and/or additional monitoring data sets from Cork County Council are included in the Appendix. Significance of results The WWTP was compliant with the ELV s set in the wastewater discharge licence as detailed in Section 2.2. The discharge from the WWTP has no observable negative impact on the Water Framework Directive status. Receiving waters are transitional waters 2.4 Pollutant Release and Transfer Register (PRTR) - report for previous year A PRTR is not required as the PE is <

9 Section 3. Operational Reports Summary 3.1 Treatment Efficiency Report - WWTP cbod COD SS (kg/yr) (kg/yr) (kg/yr) Influent mass loading (kg/year) 62, ,452 84,054 Effluent mass emission (kg/year) 3,519 21,929 8,854 % Efficiency (% reduction of influent load) 94% 91% 89% 3.2 Treatment Capacity Report - WWTP Table Treatment Capacity Report Summary - WWTP 1 Hydraulic Capacity Design / As Constructed (dry weather flow) (m3/day) 1,386 Hydraulic Capacity Design / As Constructed (peak flow) (m3/day) 4,104 Hydraulic Capacity Current loading (m3/day) 2,325 Hydraulic Capacity Remaining (m3/day) 1,779 Organic Capacity - Design / As Constructed (PE) 6,000 Organic Capacity - Collected Load (PE) 4,634 Organic Capacity Remaining (PE) 1,366 Will the capacity be exceeded in the next three years? ( / No) No 9

10 3.3 Extent of Agglomeration Summary Report In this section Irish Water is required to report on the amount of urban waste water generated within the agglomeration. It does not include any waste water collected and created in a private system and discharged to water under a Section 4 Licence issued under the Water Pollution Acts 1977 (as amended). Table Extent of Agglomeration Summary Report % of P.E. load generated in the agglomeration Load generated in the agglomeration that is collected in the sewer network Load collected in the agglomerations that enters treatment plant Load collected in the sewer network but discharges without treatment (includes SWO, EO, and any discharges that are not treated) Estimated / Measured 100% Estimated 80% Estimated 20% Estimated Load generated in the agglomeration that is collected in the sewer network is the total load generated and collected in the municipal network within the boundary of the agglomeration. Load collected in the agglomerations that enters treatment plant is that portion of the previous figure which enters the waste water treatment plant. Load collected but discharged without treatment is that portion of the first figure which is discharged without treatment. 3.4 Complaints Summary A summary of complaints of an environmental nature is included below. Table Complaints Summary Table Number of Nature of Complaint Complaints 2 Investigation Sewage Flooding - Below Ground Waste Water Number Open Complaints 0 2 Number Closed Complaints 10

11 3.5 Reported Incidents Summary A summary of reported incidents is included below. Table Summary of Incidents Incident Type (e.g. Noncompliance, Emission, spillage, pollution incident) Breach of ELV Uncontrolle d Release Incident Description Cause No. of Incidents Breach of ELV for SS - Cause of incident due to construction work being carried out near the drain and silt was washing into the drain resulting in a high SS at the secondary discharge point SW Overflow from supernatant pump sump within the WWTP site. The actuated WAS valve, that draws sludge from the clarifier to the PFT tank, somehow stuck open and Clarifier WAS flow was constantly running into the PFT tank, which overflows into the supernatant pump sump. The supernatant pumps were not able to beat this volume of flow and sump started to overflow and got to Other (add details) Plant or equipment breakdown at WWTP Recurring Incident (/No) Corrective Action 1 No None - Cause of incident due to construction work being carried out near the drain and silt was washing into the drain resulting in a high SS at the secondary discharge point 1 No Action on 27/05/2017: The actuated WAS valve was closed manually by operator to stop flow into PFT and Supernatant tanks. Authorities Contacted. Note 1 IFI, SFPA, FSAI, BIM, DAFM IFI, SFPA, FSAI, BIM, DAFM Reported to EPA (/No) Closed (/No) 11

12 Uncontrolle d Release Other the public road outside the plant. Overflow from main pumping station Fault occurred at the wwtp which inhibited the pumps at the pumping station. During the 6 hours while the foul pumps where inhibited the storm pumps ran for approx 2 hours into Bantry harbour. Power outage at Bantry WWTP which occurred at 7.30 am on 17/10/2017. Red Alert Weather Warning was in place on Limited information available, the incident will be updated as more details become available. Plant or equipment breakdown at WWTP Adverse Weather 1 No Action on 06/09/2017: Fault corrected at the wwtp details of fault are not known as plant is run by DBO contractor. Currently awaiting details of incident from the DBO contractor IFI, SFPA, FSAI, BIM, DAFM 1 No Power restored by ESB IFI, SFPA, FSAI, BIM, DAFM Note 1: For shellfish waters notify the Marine Institute (MI) Sea Fisheries Protection Authority (SFPA) Food Safety Authority (FSAI) and An Bord Iascaigh Mhara (BIM). This should also include any other authorities that should be contacted arising from the findings of any Licence Specific Reports also e.g. Drinking Water Abstraction Impact Risk Assessment, Fresh Water Pearl Mussel Impact Assessments etc. Table Summary of Overall Incidents Number of Incidents in Number of Incidents reported to the EPA via EDEN in Explanation of any discrepancies between the two numbers above N/A 12

13 3.6 Sludge / Other inputs to the WWTPs Other inputs to the waste water treatment plants are summarised in Table 3.6 below. Table Other Inputs Input Type Quantity P.E. % of load to WWTPs Domestic /Septic 0 m3 0 Tank Sludge Waterworks Sludge 0 m3 0 Industrial / 0 m3 0 Commercial Sludge Landfill Leachate 0 m3 0 (delivered by tanker) Landfill Leachate 0 m3 0 (delivered by sewer network) Other (specify) 0 m3 0 Included in Influent Monitoring? (Y/N) Is there a leachate/sludge acceptance procedure for the WWTP? (Y/N) Is there a dedicated leachate/sludge acceptance facility for the WWTP? (Y/N) 13

14 Section 4. Infrastructure Assessments and Programme of Improvements 4.1 Storm water overflow identification and inspection report The Storm Water Overflow Identification & Inspection report is included below. A summary of the significance and operation is included below. Table SWO Identification and Inspection Summary Report WWDL Name / Code for Storm Water Overflow Bantry SW1BANT (Old primary discharge point) Bantry SW2BANT Bantry SW007 Bantry SW008 Irish Grid Ref. E98665, N48326 E99274, N48609 E99758, N48455 E99626, N48388 Included in Schedule A4 of the WWDL Significance of the overflow (High/Med/ Low) Compliance with DoEHLG criteria No. of times activated in 2017 (No. of events) Total volume discharged in 2017 (m3) Total volume discharged in 2017 (P.E.) Estimated / Measured data No Low Compliant Not Known Not Known Not known Estimated No Low Compliant Not Known Not Known Not known Estimated Low Compliant Not Known Not Known Not known Estimated Low Compliant Not Known Not Known Not known Estimated Table SWO Identification and Inspection Summary Report How much sewage was discharged via SWOs in the agglomeration in the year (m3/yr)? How much sewage was discharged via SWOs in the agglomeration in the year (p.e.)? What % of the total volume of sewage generated in the agglomeration was discharged via SWOs in the agglomeration in 2013? Is each SWO identified as non-compliant with DoEHLG Guidance included in the Programme of Improvements? The SWO assessment includes the requirements of relevant WWDL Schedules (/No) Have the EPA been advised of any additional SWOs / changes to Schedules A/C under Condition 1? Unknown Unknown Unknown No No N/A 14

15 4.2 Report on progress made and proposals being developed to meet the improvement programme requirements. The Improvement Programme report included addresses the Specified Improvement Programmes as detailed in Schedules A3 and C of the WWDL. It should detail other improvements identified through assessments required under the licence. Table Specified Improvement Programme Summary Specified Improvement Programmes Licence Schedule Licence Completion Date Date Expired Discontinue SW003 Secondary Discharge Status of Works % Construction Work Completed Expected Completion Date Comments C 31/12/2015 Not started 0% Unknown The improvement programme will be reviewed by IW to assess the works required to comply with the licence condition on a prioritised basis. Discontinue SW004 Secondary Discharge C 31/12/2015 Not started 0% Unknown The improvement programme will be reviewed by IW to assess the works required to comply with the licence condition on a prioritised basis. A summary of the status of any improvements identified by under Condition 5.2 is included below. Table Improvement Programme Summary Improvement Identifier / Name Improvement Description Improvement Source Progress (% complete) Expected Completion Date N/A N/A N/A N/A N/A N/A Comments 15

16 Table Sewer Integrity Risk Assessment Tool Summary The Improvement Programme Risk Assessment should include an assessment of the Rating (High, integrity of the existing wastewater Medium, Low) works for the following: Risk Assessment Score Reference to relevant section of AER (e.g. Appendix 2 Section 4. Specified improvements Comment Hydraulic Risk Assessment Score High 145 Appendix 7.4 On DAP list, 2 years to complete Environmental Risk Assessment Low 120 Appendix 7.4 Score Structural Risk Assessment Score Medium 75 Appendix 7.4 Operation & Maintenance Risk Low 42 Appendix 7.4 Assessment Score Overall Risk Score for the agglomeration High 382 Appendix

17 Section 5. Licence Specific Reports Licence Specific Reports Summary Table Licence Specific Report Required by Condition 5 in Licence Required in this AER or outstanding from previous AER? Included in this AER? Priority Substances Assessment Required No No AER 2015 Drinking Water Abstraction Not Required No No Point Risk Assessment Shellfish Impact Assessment Not Required No No Pearl Mussel Report Not Required No No Toxicity/Leachate Management Not Required No No Toxicity of Final Effluent Report Not Required No No Small Stream Risk Score Not Required No No Assessment Habitats Impact Assessment Not Required No No Reference to previous AER containing report or relevant section of this AER Licence Specific Reports Summary of Findings Licence Specific Report Recommendations Summary of Recommendations in Report in Report Priority Substances Assessment Further investigation is considered necessary to establish the impact, if any, on the receiving waters. A consultation process with the EPA is proposed to be undertaken by Irish Water in 2016 to establish appropriate levels of monitoring for priority and dangerous substances. Drinking Water Abstraction N/A Point Risk Assessment Shellfish Impact Assessment N/A Pearl Mussel Report N/A Toxicity/Leachate Management N/A Toxicity of Final Effluent Report N/A Habitats Impact Assessment N/A 17

18 5.1 Priority Substances Assessment The Priority Substance Assessment Report was submitted previously in AER A summary of the significance and operation is included below. Table Priority Substance Assessment Summary Report Does the assessment use the Desk Top Study Method or Screening Analysis to determine if the discharge contains the parameters in Appendix 1 of the EPA guidance? Does the assessment include a review of Trade inputs to the works? Does the assessment include a review of other inputs to the works? Does the report include an assessment of the significance of the results where a listed material is present in the discharge? (e.g. impact on the relevant EQS standard for the receiving water) Does the assessment identify that priority substances may be impacting the receiving water? Does the Improvement Programme for the agglomeration include the elimination / reduction of all priority substances identified as having an impact on receiving water quality? Recommendations Status of any improvement measures required Desk Top Study No Further investigation is considered necessary to establish the impact, if any, on the receiving waters. A consultation process with the EPA is proposed to be undertaken by Irish Water in 2016 to establish appropriate levels of monitoring for priority and dangerous substances. N/A 18

19 Section 6. Certification and Sign Off Table Summary of AER Contents Does the AER include an executive summary? Does the AER include an assessment of the performance of the Waste Water Works (i.e. have the results of assessments been interpreted against WWDL requirements and or Environmental Quality Standards)? Is there a need to advise the EPA for consideration of a technical amendment / review of the licence? List reason e.g. additional SWO identified Is there a need to request/advise the EPA of any modifications to the existing WWDL? Refer to Condition 1.7 (changes to works/discharges) & Condition 4 (changes to monitoring location, frequency etc.) List reason e.g. failure to complete specified works within dates specified in the licence, changes to monitoring requirements Have these processes commenced? (i.e. Request for Technical Amendment / Licence Review / Change Request) Are all outstanding reports and assessments from previous AERs included as an appendix to this AER? Ensure the following reports are included Reassign secondary discharge point to SWO's, & Additional SWO's No N/A No N/A Declaration by Irish Water The AER contains the following: Introduction and background to 2017 AER. Monitoring Reports Summary. Operational Reports Summary. Infrastructural Assessment and Programme of Improvements. Licence specific reports Certification and Sign Off Appendices I certify that the information given in this Annual Environmental Report is truthful, accurate and complete: Signed: Date: 23/02/2018 Michael O'Leary Acting Head of Environmental Regulation 19

20 Section 7. Appendices Appendix 7.1 Statement of Measures / Improvement Programme No additional measures have been taken in 2017 in relation to prevention of environmental damage. The need for measures to prevent environmental damage will be reviewed on an annual basis. 20

21 Appendix 7.2 Ambient Monitoring Downstream Date Ortho P BOD D.O. (% Sat) ph Faecal C. Cfu/100m ls Intestinal.E cfu/100mls SS E. Coli Cfu/100mls 11/01/2017 >100 >100 >100 15/02/ /03/ /04/ /05/ /06/ /07/2017 > >400 09/08/2017 > > /09/ /10/ /11/ /12/ Mean %ile Temperature ( C) 21