Treatment effects have been updated for some substances* and facilities after new data. We will continue the work of revising other treatment effects after newly added data. For dry ponds, wet ponds and oil separators the functions for calculated treatment effects have been adjusted for some substances, which may give higher or lower effects depending on size conditions.

*For a full list of affected substances, please see the release notes in StormTac Web or refer to the StormTac Database.