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The innovative methods described in Option 3 each have <br />physical and technical limitations and would require public <br />acceptance of unusual or non-standard concepts. An example of <br />such an unusual arrangement is the Bayside Beach division (former <br />Stubbs Bay Marina property) where each of the three houses has a <br />holding tank for toilet wastes and an individual set of septic <br />tanks with pump, discharging to 3 individual (but visually <br />connected) mound graywater systems on a single Outlot devoted for <br />septic and driveway usage only. Use of a similar system in other <br />areas of Stubbs Bay might not be as suitable given the specific <br />site conditions. <br />OPTION 4. Installation of a collection system connected to <br />a community drainfield. <br />The community drainfield system, in which sewage from <br />individual households is collected and transported to a nearby <br />site for treatment and disposal through a soil treatment unit (or <br />drainfield), is occasionally used for rural housing clusters or <br />lakeshore areas where municipal sewers do not exist, and where <br />the housing density or on -site soil conditions would not allow <br />the use of standard septic systems on each site. By definition, <br />the community systeir� has two parts - the collection system and <br />the treatment/disposal system. The treatmentdisposal system (or <br />the actual drainfield) requires a parcel of land sized in <br />proportion to the amount of waste water to be treated and <br />disposed of and is based on the capability of the soil to accept <br />and treat the wastewater (see Exhibit V. <br />The University of Minnesota Agricultural Extension Service <br />and the MPCA suggest that a community septic-tank/drainfield <br />system should generally :�,,)t be used for more than 10 homes. <br />Greater amounts of effluent discharged into a concentrated <br />location in the soil will either not be accepted hydraulically or <br />will create nutrient or nitrate problems as the liquid percolates <br />downwards. <br />Aside from these potential hydraulic/pollution problems, the <br />estimated costs of a collection system and community drainfield <br />for the Stubbs Bay area will likely rival or exceed the costs of <br />a collection system discharging to the existing municipal sewer <br />at Tonkawa Road. <br />20 <br />