An interim decision has been reached over the now capped Richmond Landfill.
This week, the Environmental Review Tribunal released a document, which requires more monitoring of contamination allegedly caused by the dump.
Ian Munro, with the Concerned Citizens of Tyendinaga, says Waste Management must add another annual test of surface water and they have to replace an offsite monitoring well.
Munro says Waste Management must also report any new discoveries of contaminant 1,4 Dioxane within 48 hours.
1,4 Dioxane is often evidence of leachate.
The tribunal is expected the release a final decision on the Concerned Citizens appeal by years end.