257. Activities to spread the following materials on a raising site or spreading site are eligible for a declaration of compliance on the conditions set out in the second paragraph:(1) waste freshwater from the cleaning of outdoor raising units or the cleaning of outdoor sedimentation units at an aquaculture site for fish or a fishing pond site;
(2) sludge from an aquaculture site for fish raised in freshwater or a fishing pond site.
The following conditions apply to the activities referred to in the first paragraph:(1) the sludge may contain(a) natural limestone certified compliant with the BNQ 0419 070 standard;
(b) a calcium or magnesium amendment certified compliant with the BNQ 0419-090 standard that may be used for that purpose;
(2) the spreading must be carried out 75 m or more from a dwelling or public institution that is not owned by the owner of the aquaculture site, fishing pond site or spreading site.