Table 5.7 (continued) Entry-level assessment Maximal and Residual risk and simplified precommissioning residual assessment assessment risk assessment (operational) Determine salinity Validation na na • and sodicity of monitoring recharge and recovered water, supported by volumetric inputs and outputs to allow a salt mass balance Quantify impacts • on receiving ecosystems, plus monitoring and investigations to define the level of residual risk Validate solute • transport model for predicting recovery efficiency and residence time Model density • effects on recovery efficiency, if needed Verification Not applicable at na Refer to • • monitoring project scale Section 6.2 of recovered water • na Determine salinity Operational • of recharge and monitoring M recovered water, supported by volumetric inputs at and outputs to regional allow a salt mass scale) balance Estimate or • Refer to measure • Section 6.2 annual injection and recovery volumes na = not applicable; TDS = total dissolved salts. 5.4 Nutrients: nitrogen, phosphorus and organic carbon This section discusses nitrogen and phosphorus recognised as environmental hazards for — water recycling (NRMMC–EPHC–AHMC 2006) and organic carbon, an important — nutrient in relation to microbial processes in the subsurface.
Table 5.7 (continued) Entry-level assessment and simplified assessment Maximal and precommissioning residual risk assessment Residual risk assessment (operational) Validation monitoring na na • Determine salinity and sodicity of recharge and recovered water, supported by volumetric inputs and outputs to allow a salt mass balance • Quantify impacts on receiving ecosystems, plus monitoring and investigations to define the level of residual risk • Validate solute transport model for predicting recovery efficiency and residence time • Model density effects on recovery efficiency, if needed Verification monitoring • Not applicable at project scale na • Refer to Section 6.2 Operational monitoring at regional scale) • Estimate or measure annual injection and recovery volumes • of recovered water na • Determine salinity of recharge and recovered water, supported by volumetric inputs and outputs to allow a salt mass balance • Refer to Section 6.2 na = not applicable; TDS = total dissolved salts. 5.4 Nutrients: nitrogen, phosphorus and organic carbon This section discusses nitrogen and phosphorus — recognised as environmental hazards for water recycling (NRMMC–EPHC–AHMC 2006) — and organic carbon, an important nutrient in relation to microbial processes in the subsurface. M
water-recycling-guidelines-mar-24.docx