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21 <br />necessary to achieve the project purposes and to meet applicable safety <br />standards. <br />2. Streamflow maintenance: Where accumulation of vegetative debris or <br />trash is found to inhibit proper streamflow, these areas will be cleared of <br />such material. The school already performs this function as part of <br />students' service requirements. Where vegetative accumulations are <br />determined to be a natural condition that fosters important natural <br />processes or contains important habitat, and will not cause adverse <br />impact to property or personal safety, natural material accumulations will <br />remain in place. <br />3. Invasive plant species: A few invasive plant species have been identified <br />on the property, which could potentially have a long -term adverse impact <br />on ecosystem diversity. These species include Tree of Heaven, Chinese <br />Privet, Princess Tree, and Chinese Wisteria. CFS intends to use <br />reasonable methods and diligence to remove and /or manage these <br />species where practical. <br />4. Existing wastewater treatment system: CFS intends to remove the <br />existing aged wastewater treatment plant located adjacent to the Lower <br />School building, and replace it with a much better treatment system <br />located away from the school's core area. In addition, the existing <br />storage lagoon for treated wastewater will be removed and replaced with <br />enclosed water storage, and the existing sprinkler spray field will be <br />replaced with a low -rate drip irrigation system. Each of these features <br />will incrementally improve wastewater system performance as compared <br />to the current condition, and will therefore provide a higher degree of <br />environmental protection and responsibility. <br />5. Drip irrigation area for treated wastewater: Several types of water <br />dispersal options were considered for the improved wastewater system, <br />but the school has chosen to install a surface drip system. This type of <br />system requires a higher degree of water treatment, storage, and <br />management, and is therefore very costly. But it was chosen because it <br />will have very low impact on the application area, which is a beautiful <br />hardwood forest containing mature beech trees as a dominant species. <br />Any subsurface type system would require excavation in the entire area, <br />requiring substantial tree removal, and reducing this wonderful forest to a <br />mostly - cleared and grassed area. Conversely, the surface drip solution <br />will preserve the forest, require only a small number of trees to be <br />removed, and will provide beneficial water and nutrients to the forest, <br />preserving the existing natural ecosystem and habitat within the forest. <br />6. Pig rescue containment area: Currently, a few small pot - bellied pigs live <br />in a fenced area near the Lower School, adjacent to the pond and within <br />a stream buffer. The school will re- locate this feature, and the pigs, to a <br />more upland wooded area east of the Lower School's grassed play area. <br />This relocation will remove the stream buffer encroachment and serve to <br />incrementally enhance water quality in the adjacent pond. <br />10 <br />