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30. The monthly BOD5 discharge limit is the product of the RPRF multiplied by a discharge standard of 4.5 kg/t and by the number of days in the month concerned.

For a dissolving grade sulphite pulp mill, the monthly BOD5 discharge limit is the limit calculated under the first or second paragraph, to which is added the product of the RPRD multiplied by a discharge standard of 18 kg/t and by the number of days in the month concerned.

For a complex having a mill whose construction was completed after 21 October 1992, the monthly BOD5 discharge limit is the limit calculated under the preceding paragraphs, to which is added the product of the RPRNF multiplied by a discharge standard of 2.2 kg/t and by the number of days in the month concerned.

30. The monthly BOD5 discharge limit is the product of the RPRF multiplied by a discharge standard of 4.5 kg/t and by the number of days in the month concerned.

For a mill or complex that, during the 12 months preceding 1 November 2007, measured for at least 30 consecutive days the BOD5 upstream from the biological treatment and whose average load exceeded 25 kg/t, the monthly limit is the product of the RPRF multiplied by a discharge standard of 6 kg/t and by the number of days in the month concerned.

For a dissolving grade sulphite pulp mill, the monthly BOD5 discharge limit is the limit calculated under the first or second paragraph, to which is added the product of the RPRD multiplied by a discharge standard of 18 kg/t and by the number of days in the month concerned.

For a complex having a mill whose construction was completed after 21 October 1992, the monthly BOD5 discharge limit is the limit calculated under the preceding paragraphs, to which is added the product of the RPRNP multiplied by a discharge standard of 2.2 kg/t and by the number of days in the month concerned.

The limit referred to in the second paragraph ceases to apply on 1 November 2009.