Infrastructure Strategy 2 Options and implication 2.2 Increased demand related to urban growth 2.1 Increased demand related to trade waste Options to address it Implications of the options (financial and non- financial) Options to address it Implications of the options (financial and non- financial) Install conventional Benefits sewerage system on new Wastewater disposal was considered at the outset of the PREFERRED OPTION Benefits sub-divisions and upgrade Urban Growth Strategy and selection of growth pockets. Ongoing communications Local economy allowed to grow to meet the market and downstream infrastructure Relatively minor downstream upgrades required. with industry support local jobs and prosperity. as necessary representatives and Downstream upgrades will help to resolve some levels of individual businesses to Costs service issues with inflow & infiltration ensure infrastructure is Approximately $23M upgrade to Blenheim STP by 2026 Costs provided to meet demand. Ensure equitable funding mechanism is agreed with Some upgrades will lead to premature replacement of industries in advance, and ensure land availability, functioning assets resource consent and cultural sensitivities are addressed at an early stage. Install non-conventional Benefits vacuum or grinder pump Lower flow volumes as less susceptible to inflow & Do nothing. Cap effluent Benefits system infiltration consequently smaller diameter reticulation and discharges once existing No further investment in infrastructure required and treatment capacity is reduced installation costs. Lower impact on downstream reached. certainty that levels of service can be maintained for infrastructure existing customers. Costs Costs Increased mechanical infrastructure with subsequent on- Economic development restricted, requiring industries to going maintenance costs. relocate. Unproven modern technology. Assist industries to Benefits develop on-site Industrial development is not restricted by wastewater alternatives to disposal to reticulation and treatment capacity. 2.3 Renewals the wastewater system. The costs of wastewater are borne by those responsible. Asset renewals will assist the Council to address the challenges associated with infiltration/inflow, climate change, earthquake risk and cultural values and the Costs opportunities of new technologies Efficiencies of scale are lost and businesses could Implications of the options (financial and non- become less viable or relocate. Options to address it financial) Do nothing. Renew pipes Benefits as and when they fail. Certainty of targeting pipes at the end of their useful life. Investment delayed as long as possible. 2018-2028 Long Term Plan Page 197