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In general, Orono's policy has been to all(.: repairs to <br />failing systems by salvaging whatever components jai, be expected <br />to continue satisfactorily without jeopardizing the rest of the <br />system, and replacing system components that have outlived their <br />usefulness or would be detrimental to proper functioning if they <br />remained as part of the system. A typical septic system repair <br />will include the addition of drainfield using the existing tanks, <br />often adding a 3rd pumping tank when the drainfield needs to be <br />located uphill. Tanks in poor condition or located in high <br />groundwater areas usually are replaced with sealed, precast <br />concrete tanks. Approximately 1/3 to 1/2 of all repair jobs <br />include a pump system or re-routing of plumbing in the house in <br />order to place drainfield on higher, dryer ground. In general, <br />drainfield additions, when propos :�d, are required to meet a11. <br />standards of the code for location in suitable soils and soil <br />water conditions, and are sized based on standards for new homes. <br />In past cases where these standards were not met, some <br />replacement drainfields failed to function frcru the day they were <br />installed. <br />Over the last 3 years because this study was under4ay, the <br />City has allowed a number of "interim bas s" repairs to existing <br />failing systems in the Study Area, s that residents would have <br />the opportunity to avoid a high -cost replacement system that <br />would have to be abandoned in a few years if sewers became a <br />reality. <br />Given the lot area requirements, lot line and structural <br />setback requirements, soil permeability and water table depth <br />criteria, the sizes of douses, the topograph1 locations and <br />construction of existing systems and the location of existing <br />wells., the replacement of existi_. septic systems in Stubbs Bay <br />with systems that .weer the minimum acceptable code standards is <br />impossible on 28% of i. properties ar.7 is severely limited or <br />questionable can another 22%. Only 50% f the properties have <br />what could be considered as adequate area fcr replacement .-.d <br />permanent usag_� of septic systems. The most critical areas are <br />Crestview Avenue, Tonka Avenue, Eastlake Street, end Westlake <br />Street. <br />16 <br />