Orange County NC Website
Browse       Search
027 <br /> If calculations show that the development will contribute greater than 3.6 lbs/ac/yr of <br /> nitrogen,then the options shown below are available. <br /> 1. Residential Development <br /> a) If the calculated nitrogen export is less than 6.0 lbs/ac/yr, then the <br /> owner may: <br /> (1) Install BMPs specified in Section 8 to reduce nitrogen export <br /> amounts to 3.6 lbs/ac/yr. <br /> (2) Pay a one-time offset payment of$330/lb. This offset fee will <br /> go to the Wetlands Restoration Program(WRP)The WRP will <br /> utilize these fees in accordance with the Basinwide Wetlands and <br /> Riparian Restoration plans. It is the policy of the WRP to utilize <br /> the funds where they are generated to the maximum extent <br /> possible. <br /> (3) A combination of BMPs and offset payments may be used to <br /> achieve 3.6 lbs/ac/yr. <br /> b) If the calculated export is greater than 6.0 lbs/ac/yr,the owner must <br /> use on-site BMPs to lower the nitrogen export to 6.0 lbs/ac/yr. The owner <br /> may then use one of the above options to achieve a nitrogen export level <br /> of 3.6 lbs/ac/yr. <br /> 2. Commercial and Industrial <br /> a) If the calculated export is less than 10.0 lbs/ac/yr, then the owner may: <br /> (1) Install BMPs specified in Section 8 to reduce nitrogen export <br /> amounts to 3.6 lbs/ac/yr. <br /> (2) Pay a one-time offset payment of$330/lb. This offset fee will <br /> go to the Wetlands Restoration Program(WRP)The WRP will <br /> utilize these fees in accordance with the Basinwide Wetlands and <br /> Riparian Restoration plans. It is the policy of the WRP to utilize <br /> the funds where they are generated to the maximum extent <br /> possible. <br /> (3) A combination of BMPs and offset payments may be used to <br /> achieve 3.6 lbs/ac/yr. <br /> b) If the calculated export is greater than 10.0 lbs/ac/yr, the owner must <br /> use BMPs to lower the nitrogen export to 10.0 lbs/ac/yr. The owner may <br /> then use one of the above options to achieve a nitrogen export level of 3.6 <br /> lbs/ac/yr. <br /> D. Calculating Peak Runoff Volume <br /> For all new development,there shall be no net increase in peak flow leaving the site from <br /> the predevelopment conditions for the I year,24 hour storm. <br /> 1. The following are acceptable methodologies for computing the pre- and post- <br /> development conditions for the 1 year, 24 hour storm. <br /> a) Rational Method <br /> b) Peak Discharge Method as described in the USDA Soil Conservation <br /> 21 <br />