120 14, Table 1, and NO3 Sediment Spring (Oct- Dec) Autumn (Mar- May) OH3, OH5 RU1, OH1, OH6 Sediment Coring Metals listed in Condition 14, Table 1 Fish (bullys) Once during summer (January to March) OC2, OH6 Analysed in accordance with appropriate USEPA procedures as agreed with Waikato Regional Council Composite whole body selenium concentratio n (dry weight) Periphyton and macrophyte Autumn (Mar-May) OC2, OH6 Analysed in accordance with appropriate USEPA procedures as agreed with Waikato Regional Council Total Selenium (both wet weight and dry weight) Table Note: The results of sampling undertaken to determine selenium concentration in fish, periphyton, macrophyte and macroinvertebrate shall be submitted to the Waikato Regional Council within one month of the sampling event. 16 At any time following the completion of two seasonal monitoring events (e.g. spring to spring), if a significant difference is deemed to have occurred between sites on both occasions, then the Consent Holder shall undertake immediate further monitoring. Should a significant difference be recorded during this further monitoring the Consent Holder shall inform the Waikato Regional Council and shall determine any mitigation measures that need to be implemented to ensure that significant effects are remedied or mitigated. ‘Significant’ is defined as follows: a. A significant difference in macroinvertebrate biota will be deemed to have occurred following a statistically significant change at test sites B and DPD of 30% above the natural variation recorded at the control sites A and UPD; b. A significant difference in total macroinvertebrate abundance will be deemed to have occurred following a statistically significant change at test sites B and DPD of 50% above the natural variation recorded at the control sites A and UPD.
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