EDGECUMBE SITE RECONSENTING DISCHARGES TO RANGITĀIKI RIVER Meeting with Rangitāiki River Forum – 6 September 2019

Recent Environmental Improvements Completed (Stages 1 and 2) Improved management of discharge to the river by: Installation of a De-aeration Tank. An upgrade of the High Strength Waste Irrigation System covering approximately 1,200 ha of farmland (irrigation providing nitrogen, phosphorus and other essential mineral elements) including: Hydrant and drain crossings improvements (including moving hydrants away from drains) New Irrigators, GPS tracking and automated shut-off systems Expansion and Upgrade of the Omeheu Medium Strength Irrigation Scheme including: Three large tanks for short term storage of wastewater (8 million litres) at Omeheu Expansion of the irrigation land area from approximately 100 ha to > 300 ha This expansion will achieve the following Decrease in nitrogen loading by 47% to current limit < 400 kg/ha/yr Diversion of up to 2000 m3/day of wastewater from the river Improved wet weather management.

Recent Environmental Improvements Completed A major upgrade to the Edgecumbe Site Stormwater Management System, including: Storm Water Network upgrade Eliminating 17 individual discharges to the Eastbank Road drain Continuous online monitoring Best practice Spill management High risk areas controlled and part of wastewater system Spill kit strategically located on site Automated diversion systems installed. Increasing reliability and monitoring, minimising risk

Wastewater and Stormwater Management Strategy Fonterra’s Wastewater and Stormwater Management Strategy is being advanced in three stages (as described in the pre-circulated Briefing Note). Between now and 30 June 2026, it is proposed that the current operation will continue with the benefit of the environmental improvements completed as part of Stages 1 and 2. Stage 3, to be implemented by 1 July 2026, will involve the construction and commissioning of a Biological Wastewater Treatment Plant (or alternative technology). The quality of the wastewater will be significantly enhanced (including a significant reduction in the mass load of contaminants discharged).

Assessment of Environmental Effects 1 July 2026 Onwards Parameter Unit Current Limit Actual Discharge (annual mean F14-F16) Proposed (annual mean) % Reduction cBOD5 Kg/day 7,500 2,774 80 97% Lactose 6,300 823 Essentially zero or 100% reduction – this is verified by the BOD mass load proposed Fat 650 (5-day average) 162 TP No limit specified 282 20 93% TN 414 120 71% NO3-N g/m3 32 6   NH4-N 0.45 2 SS 3,000 382 60 84% pH 6 – 9 1.48 – 12.94 E.coli 110 cfu/100mL