CASE STUDY NENAGH REGIONAL WATER SUPPLY PLANT

PUBLIC WATER SUPPLIES PERSPECTIVE BOTTLED WATER USAGE in IRELAND BOTTLED WATER USAGE in IRELAND = 0.3 million Litres / day = 0.3 million Litres / day NENAGH R.W.S.P. PRODUCTION NENAGH R.W.S.P. PRODUCTION = 7.5 million Litres / day = 7.5 million Litres / day NORTH TIPPERARY Co. Co. PRODUCTION NORTH TIPPERARY Co. Co. PRODUCTION = 26 million Litres / day = 26 million Litres / day

PUBLIC WATER V’s BOTTLED WATER

SUPPLY √ TREATMENT X

COMMISSIONED COMMISSIONED ISO HYGIENE MARK Q – MARK ISO E.T.P NENAGH R.W.S.P.

Nenagh Regional Water Supply Plant

PROCESS CHEMICALS SPECIFICATION (Food Grade, Conc., Tolerance) SPECIFICATION (Food Grade, Conc., Tolerance) CERTIFICATE OF ANALYSIS CERTIFICATE OF ANALYSIS CHEMICALS FOLDER CHEMICALS FOLDER SUMMARY RECORD SUMMARY RECORD TRACEABILITY TRACEABILITY

Source Water

Coagulation & Flocculation

PROCESS CONTROL CHEMICAL DOSING - 7 CHEMICALS - 7 CHEMICALS - VERIFICATION - DAILY - DAILY

Aluminium Sulphate (8%) TARGET TARGETDOSE 5 % TOLERANCE 5 % TOLERANCE ALLOWABLE RANGE

LOG OF CHANGES TO DOSE RATES DATE (%) S. ACID (ppm) ALUM. (ppm) POLY. (ppm) CARBON (ppm) CL2 (ppm) F REASON APPROVED BY 3 FEB ELEVATED SOURCE COLOUR MB 10 MAY SUMMER DOSING SEASON MB 1 JUNE LOWER SOURCE COLOUR - TASTE JM 5 JULY LOWER SOURCE COLOUR MB 20 JULY INCREASE FREE RES CL2 MB 2 SEPT INCREASE FREE RES CL2 MB

ENHANCED COAGULATION

DOSING - REFERENCE CHART LAKE COLOUR ALUM DOSE CARBON DOSE COAG. PH PHSETTLEDTURB.CL2DOSE FINAL W. FREE CL2 THM JAN - FEB MAR - APR MAY - JUNE JULY - AUG SEPT - OCT NOV - DEC

Carbon Dosing

CLARIFICATION & FILTRATION CLARIFIERS - 3 x 500 M3 Tanks - 3 x 500 M3 Tanks - Upward Flow Rate (Max.) = Upward Flow Rate (Max.) = 1.8 M/Hr. FILTERS - 3 x R.G. Sand Filters - 3 x R.G. Sand Filters - Filtration Rate (Max.) = 3.9 M/Hr. - Filtration Rate (Max.) = 3.9 M/Hr.

TURBIDITY MONOTORING

POST - FILTRATION CHLORINE DIOXIDE - Taste CHLORINE DIOXIDE - Taste CHLORINATION - T.H.M. CHLORINATION - T.H.M. FLUORIDATION FLUORIDATION PHOSPHORIC ACID - Enhanced Coagulation PHOSPHORIC ACID - Enhanced Coagulation

CHLORINE DIOXIDE

CHLORINE CONTROL

INSPECTION & TESTING SAMPLING PLAN SAMPLING PLAN - SOURCE WATER - SOURCE WATER - SETTLED WATER - SETTLED WATER - FILTERED WATER - FILTERED WATER - FINAL WATER - FINAL WATER

Final Water Cryptosporidium Monitoring

Continual Improvement Key Performance Indicators (K.P.I.) Key Performance Indicators (K.P.I.) - Process - Process - Quality - Quality - Cost - Cost - Environmental - Environmental - External Audit Results ( eg. H-Mark Score) - External Audit Results ( eg. H-Mark Score)

Issues Issues Process Chemicals - data Process Chemicals - data CAR’s - review CAR’s - review Paperwork - volume Paperwork - volume Design - practical Design - practical

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