Metal and Diamond Mining Effluent Regulations

20 (1) Subject to subsection (4), the owner or operator of a mine shall record in kilograms the mass loading of the deleterious substances set out in column 1 of Schedule 4 contained in the effluent deposited from each final discharge point for each day on which the sample is collected for that deleterious substance under section 12 or 13.

(2) Subject to subsection (4), the owner or operator shall determine the mass loading by multiplying the concentration of the deleterious substance recorded under section 12 or 13 by the total volume of effluent deposited from each final discharge point on the day on which the sample is collected.

(3) The owner or operator shall determine the mass loading for each calendar month by multiplying the average of all mass loadings determined for that month under subsection (2) by the number of days in that calendar month during which there was a deposit.

(4) If the owner or operator of a mine has reduced the frequency of testing to not less than once in each calendar quarter under subsection 13(1) or (2), the owner or operator shall determine the mass loading for the calendar quarter by multiplying the concentration of the deleterious substance as measured in that calendar quarter by the total volume of effluent deposited from each final discharge point during the three months preceding the day of collection of the sample.

(5) If the analytical result from any test conducted under section 12 is less than one-tenth of the method detection limit set out in column 4 of Schedule 3, the test result shall be considered to be zero for the purpose of performing a calculation under subsection (2).