The Planning Board may require that projects classified as major developments under this chapter conduct an analysis of nutrient export levels and incorporate nutrient loading control devices such as sedimentation/retention ponds, infiltration systems, wet ponds, swales, or flow strips if necessary to reduce the level of nutrient export to acceptable levels. This analysis shall be carried out in accordance with "Phosphorous Control in Lake Watersheds: A Technical Guide for Evaluating New Developments," published by the Maine Department of Environmental Protection, as may be amended from time to time. If the phosphorous method requires removal of more than seventy-five percent (75%) of the increase in phosphorous load to meet the phosphorous export limit, the Planning Board may increase the limit to a level obtainable through on-site use of Best Management Practices as identified in the Stormwater Best Management Practices Manual.

If the project is classified as a major site plan and is in the watershed of a great pond, phosphorus impacts will be managed in compliance with the relevant requirements of § 275-47: Phosphorus impacts on great ponds and § 275-60: Phosphorus export.

See § 280-15-2: Watershed performance standards for more detailed information.