(A) The project shall meet one or a combination of the following for the entire project area:
(1) Projects draining to the Tar-Pamlico river basin shall meet a nitrogen loading rate target of 4.0 pounds per acre per year (lbs/ac/yr) and a phosphorus stormwater loading target of 0.8 lbs/ac/yr; or
(2) Projects draining to the Neuse river basin shall meet a nitrogen loading rate target of 3.6 pounds per acre per year (lbs/ac/yr). Projects draining to the Neuse river basin are not required to meet phosphorus loading rate targets; or
(3) Projects meet "runoff volume match" as defined in 15A NCAC 02H .1002.
(B) The project area used for nutrient calculation and stormwater requirements includes the site area less any existing built-upon area. The project density used for determining stormwater requirements is the amount of built-upon area subject to this chapter at project completion divided by the project area.
(C) The developer shall determine the nitrogen and phosphorus loading generated from the project area without engineered stormwater controls, and determine the needed nitrogen or phosphorus reduction by using the approved accounting tool.
(D) The nitrogen and phosphorus loading standards in this chapter are supplemental to, not replacements for, stormwater standards otherwise required by federal, state or local law, including without limitation any riparian buffer requirements applicable to the location of the development. This includes, without limitation, the riparian buffer protection requirements of 15A NCAC 02B .0714, 15A NCAC 02B .0734 and 15A NCAC 02B .0295.
(Ord. No. 24-021, § 1, passed 4-11-2024)