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ANNUAL REPORTING REQUIREMENTS FOR RECYCLED WATER SCHEMES

ANNUAL REPORTING REQUIREMENTS FOR RECYCLED WATER SCHEMES. Legatus Conference 2019. EPA’s monitoring requirements. CWMS smaller than 5 ML/y in a water protection area and 50 ML/y outside a water protection area don’t require a licence, hence no annual reports

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ANNUAL REPORTING REQUIREMENTS FOR RECYCLED WATER SCHEMES

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  1. ANNUAL REPORTING REQUIREMENTS FOR RECYCLED WATER SCHEMES Legatus Conference 2019

  2. EPA’s monitoring requirements • CWMS smaller than 5 ML/y in a water protection area and 50 ML/y outside a water protection area don’t require a licence, hence no annual reports • For the larger schemes, where the licence asks for a monitoring report, the timing has been aligned with the DHW i.e. September each year • EPA is flexible as on operators’ request, it has allowed six monthly reporting for certain schemes

  3. Recycled water criteria for WWTPs • BOD5 not greater than 20 mg/L • Suspended solids not greater than 30 mg/L • Thermotolerant coliform (E coli) count not greater than 100/100 mL • Total chlorine level of not less than 1 mg/L

  4. Monitoring frequency for new WWTPs • Monthly for 12 months, then pending successful completion of this regime, quarterly thereafter • After satisfactory completion of the initial 12 months, an annual report due on the 30th September each year (for the period of 1st July to 30th June of each year) • Report immediately when there is a malfunction of the system or the recycled water quality criteria is not achieved

  5. Why is annual report required? • To make sure that the WWTP is operating correctly • The recycled water is safe to use • An opportunity for the operators to review system performance

  6. Annual report – What, Why and Benefits (1)

  7. Annual report – What, Why and Benefits (2)

  8. Example of a failing system

  9. Recycled water quality trends • Plotting the past 3 years data gives a snap shot of how the system has been performing over time and identifies any ongoing issues. • Trending data provides with the opportunity to assess the plants performance and identify whether any routine maintenance or upgrades need to be planned for in the future.

  10. Sample location • Clearly defined sample location helps in the interpretation of the sample result and whether the sample is representative of the water quality. • It reduces the likelihood of incorrect samples being taken. • Generally, samples should be collected at the point where the recycled water enters the distribution system. However, there could be more than one sample locations depending on the treatment train.

  11. Format for a monitoring report • Introduction of the system • Monitoring results in form of a table • Incidents and the corrective actions taken • A flowchart showing the WWTP layout and the sampling location • Attach the populated spreadsheet provided by DHW

  12. New Incident Notification form

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