155 Total ammonia Heavy metals (Iron, manganese, copper, nickel, zinc, silver, anantimony, arsenic, selenium, cadmium, chromium (iv), lead and mercury. Table Note: The Northern Rock Stack Collection Pond overflow monitoring programme for metals is for ‘acid-soluble’ concentrations determined on unfiltered samples. 17 Results of the monitoring undertaken in accordance with Condition 16 shall be forwarded to Waikato Regional Council quarterly. 18 All water quality sampling and analysis shall be undertaken using Standard Methods for the Examination of Water and Wastewater (19th Edition 1995, or updates), APHA, AWWA and WEF, unless otherwise agreed in writing by Waikato Regional Council. Analyses shall be undertaken at an appropriately qualified laboratory. All other measuring, testing, recording and analytical methods as may be required from time to time pursuant to the requirements of this consent shall be to the satisfaction of the Waikato Regional Council.
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