Pulp and Paper Effluent Regulations (SOR/92-269)

1 The test to determine the acute lethality of effluent is a test conducted in accordance with section 5 or 6 of Reference Method EPS 1/RM/13 Second Edition.

• 2 (1) The test in respect of Daphnia magna is a test conducted in accordance with section 5 or 6 of Reference Method EPS 1/RM/14 Second Edition.

• (2) Effluent fails the Daphnia magna test when, at 100 per cent concentration, it kills more than 50 per cent of the Daphnia magna subjected to it during a 48-hour period.

• 3 (1) The test to determine the BOD of an effluent is a test conducted in accordance with one of the following standard five-day BOD test methods (BOD₅):

  • (a) the method described in subsections 5210A and 5210B of Standard Methods for the Examination of Water and Wastewater, 20th Edition, 1998, published jointly by the American Public Health Association, the American Water Works Association and the Water Environment Federation, as amended from time to time;

  • (b) the method described in Method H.2, Determination of Biochemical Oxygen Demand, December 1991, published by the Technical Section of the Canadian Pulp and Paper Association (now the Pulp and Paper Technical Association of Canada), as amended from time to time; or

  • (c) a test method equivalent to a method referred to in paragraph (a) or (b) that is required by or authorized under the law of the province where the mill is located.

• (2) The quantity of BOD is measured in terms of an unfiltered sample.

• (3) Despite subsection (1), the test to determine the BOD of an effluent shall

  • (a) commence within 48 hours of the sampling; and

  • (b) be conducted on a sample that is of such concentration that the depletion of oxygen is equal to or greater than 30% but does not exceed 60%.

• 4 (1) The test to determine the presence and quantity of suspended solids in effluent is a test conducted in accordance with one of the following standard test methods for total suspended solids:

  • (a) the applicable method described in subsections 2540A to 2540E of Standard Methods for the Examination of Water and Wastewater, 20th Edition, 1998, published jointly by the American Public Health Association, the American Water Works Association and the Water Environment Federation, as amended from time to time;

  • (b) the method described in Method H.1, Determination of Solids Content of Pulp and Paper Mill Effluents, August 1993, published by the Technical Section of the Canadian Pulp and Paper Association (now the Pulp and Paper Technical Association of Canada), as amended from time to time; or

  • (c) a test method equivalent to a method referred to in paragraph (a) or (b) that is required by or authorized under the law of the province where the mill is located.

• (2) For the purposes of the suspended solids test, where a sample is difficult to filter, the bulk of the solids should be allowed to settle before the sample is filtered so that the upper portion of the sample can be filtered first.