113 Table 1 Notes: (1) “Normal Compliance” values to be met 97% of time based on all analyses taken during a quarterly period when the WTP is discharging. “Maximum” values are not to be exceeded in any single analysis. (2) Operating Regime A - For hardness related metals, the compliance values in Table 1 assume a hardness in the WTP discharge of 670 g/m3 as CaCO3 prior to dilution in the Ohinemuri River. This equates to an in-river hardness of about 100 g/m3 as CaCO3 following mixing. Refer to Table 2 for the compliance levels at differing hardness concentrations. (3) Operating Regime B – For hardness related metals, the compliance values in Table 1 assume a hardness in the RO only discharge of zero and 530 g/m3 CaCO3 prior to dilution in the Ohinemuri River. This equates to an in-river hardness of about 100 g/m3 as CaCO3 following mixing. Refer to Table 2 for the compliance levels at differing hardness concentrations. (4) Operating Regime C – Prior to discharge of RO permeate, hardness must be added to achieve a minimum hardness of 200 g/m3 as CaCO3 to ensure in-river compliance for hardness-related metals. Refer to Table 2 for the compliance levels at differing hardness concentrations. (4a) Operating Regime D – For hardness related metals, the compliance values in Table 1 assume a hardness in the WTP discharge of 315 g/m3 as CaCO3 prior to dilution in the Ohinemuri River. This equates to an in-river hardness of about 100 g/m3 as CaCO3 following mixing. Refer to Table 2 for the compliance levels at differing hardness concentrations. (4b) Operating Regime E – For hardness related metals, the compliance values in Table 1 assume a hardness in the WTP discharge of 243 g/m3 as CaCO3 prior to dilution in the Ohinemuri River. This equates to an in-river hardness of about 100 g/m3 as CaCO3 following mixing. Refer to Table 2 for the compliance levels at differing hardness concentrations. (5) Values are trigger limits, not compliance limits. In the event that the trigger limits are exceeded, the Consent Holder shall inform the Waikato Regional Council as soon as practicable and prepare a report, to the satisfaction of the council, to demonstrate that continued discharges at concentrations exceeding the trigger limits will have no more than minor effects on the Ohinemuri River. This report shall be provided to the Waikato Regional Council within two months of the Consent Holder becoming aware of the trigger exceedence. (6) Current analytical procedures for mercury have a practical quantification limit (PQL) of 0.0005 g/m3, and for chromium (VI) have
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