Metal and Diamond Mining Effluent Regulations

19 (1) The owner or operator of a mine shall record, in cubic metres, the total monthly volume of effluent deposited from each final discharge point for each month during which there was a deposit.

(2) The total monthly volume of effluent deposited shall be either

• (a) determined on the basis of the average of the flow rates, expressed in cubic metres per day, measured and calculated as follows:

  • (i) by measuring the flow rate at the same time as samples are collected under section 12,

  • (ii) by calculating the average monthly flow rate by adding the flow rate measurements taken during the month and dividing the total by the number of times the flow rate was measured, and

  • (iii) by multiplying the average monthly flow rate by the number of days during the month that effluent was deposited; or

• (b) determined by using a monitoring system that provides a continuous measure of the volume of effluent deposited.

(3) The owner or operator shall

• (a) measure the flow rate or volume of effluent deposited by using a monitoring system that is accurate to within 15% of measured flow rate or volume; and

• (b) calibrate the monitoring system not less than once in each year and record the results.