Metal and Diamond Mining Effluent Regulations

15 (1) If a sample of effluent is determined to be acutely lethal when tested under paragraph 14(1)(a), the owner or operator of a mine shall

• (a) without delay, conduct the effluent characterization set out in subsection 4(1) of Schedule 5 on the aliquot of each grab sample collected under paragraph 14(1)(a);

• (b) collect from each final discharge point a grab sample twice a month and conduct an acute lethality test on each grab sample without delay in accordance with the procedure set out in section 6 of Reference Method EPS 1/RM/13; and

• (c) collect the grab samples not less than seven days apart.

(2) The owner or operator may resume sampling and testing at the frequency prescribed in section 14 if the effluent is determined not to be acutely lethal in three consecutive tests conducted under paragraph (1)(b).