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Recommendations of the On -Site Wastewater Treatment Systems <br />Nitrogen Reduction Technology Expert Review Panel February 2014 <br />Contents <br />Acknowledgments....................................................................................................................................... 8 <br />Summaryof Recommendations................................................................................................................. 9 <br />1 Expert Panel Charge and Membership...........................................................................................14 <br />2 Baseline Loadings from On -Site Systems........................................................................................16 <br />2.1 Introduction................................................................................................................................. 16 <br />2.2 Existing Model Synopsis............................................................................................................ 16 <br />2.3 Baseline Septic Tank Effluent TN Recommendation................................................................. 17 <br />2.4 Baseline Edge-of-Drainfield TN Recommendation....................................................................19 <br />2.5 Overall Recommendations for Assessing BMP Efficiencies...................................................... 20 <br />2.5.1 Assessing Ex Situ Treatment to Reduce TN Prior to Soil Treatment 22 <br />2.5.2 Assessing In Situ Treatment to Reduce TN within Soil Unit <br />23 <br />2.5.3 Assessing Combined Ex Situ/In Situ BMPs <br />23 <br />3 BMP Definitions and Qualifying Conditions.................................................................................. <br />24 <br />3.1.1 Overarching Management Activities <br />25 <br />3.2 Proprietary and Nonproprietary BMPs....................................................................................... <br />26 <br />3.2.1 Proprietary System Protocol <br />27 <br />3.2.2 Nonproprietary System Protocol <br />28 <br />3.3 BMP Summary Recommendations............................................................................................. <br />28 <br />3.4 Secondary Treatment Systems Certified Under NSF Standard 40 Class I or Equivalent........... <br />32 <br />3.4.1 Detailed Definition of Practice <br />32 <br />3.4.2 Nitrogen Load Reduction and Recommended Credit <br />33 <br />3.4.3 Ancillary Issues and Interactions with Other Practices <br />34 <br />3.4.4 Design and Installation Criteria <br />35 <br />3.4.5 Temporal Performance <br />35 <br />3.4.6 Recommended Management Requirements <br />35 <br />3.4.7 Review Timeline and Recommendations <br />35 <br />3.5 Intermittent (Single Pass) Media Filters..................................................................................... <br />36 <br />3.5.1 Detailed Definition of Practice <br />36 <br />3.5.2 Nitrogen Load Reduction and Recommended Credit 37 <br />3.5.3 Ancillary Issues and Interactions with Other Practices 38 <br />3.5.4 Design and Installation Criteria 38 <br />O TETRA TECN.INC. <br />2 <br />