Laserfiche WebLink
Paqe 2 <br /> SUMMARY <br /> MINNETONKA BLUFFS AND SHORELINE/WEST FERNDALE/ORONO LANE <br /> SEWAGE TREATMENT EVALUATION AND ALTERNATIVES <br /> EXISTING CONDITIONS <br /> Untreated septic tank effluent is presently flowing on the g�ound surface <br /> at 9 of 22 existing residences in the Minnetonka Bluffs Area. In addition, <br /> various other residences have drainfields in wetlands or marshy soils or <br /> have wells near �heir own or a neighbor ' s drainfield. In the lakeshore <br /> area, many existing drainfields are in or near the water table and have <br /> a high potential for causing lake pollution. <br /> VARIOUS ALTERNATIVES FOR DISPOSAL AND TREATMENT <br /> ALTERNATIVE PROS • CONS <br /> Repair Existing Where feasible is the least Small lots restrict area <br /> System by adding expensive alternative to useful for drainfield due <br /> drainfield and/or provide effective treatment to setback requirements <br /> repair tanks. and disposal on a long term Topography (slopes) , lakes <br /> basis . wetlands, high seasonal <br /> water tables andimpermeabl <br /> clay soils further limit <br /> standard drainfield use. <br /> Typical cost for a 3-br. <br /> " home - $1, 800 - $2 , 200. <br /> Alternative Mound Effectively useful drain- Requires flat area of abou <br /> System - built field for certain high 40 ' X 60 ' for a 3-br. ' <br /> above ground. water table/clay soil home. Still restricted <br /> conditions on a long by very high water tables <br /> . term basis. and very unsuitable clay <br /> soils. Requires pump in <br /> the septic tank. Typical <br /> cost. - $4 , 000 - $5, 000 . <br /> Greywater System Reduces water use by Still must treat and dis- <br /> relies on use of 30$ - 50$, therefore pose of laundry, �bathtub <br /> non-water using less water to treat and � or shower, and kitchen <br /> toilets , i. e. dispose of - could have wastes. State Plumbing <br /> incinerator toilets, smaller drainfields than Code requires water�-flush <br /> composting toilets, norr,►al. toilets for residential <br /> _recirculating fluid use. Public acceptance <br /> or marine holding of alternative toilets is <br /> tank toilets. a concern. Cost approxi- <br /> mately equal to standard <br /> � drainfield system since <br /> cost of alternative toilet <br /> is offset by smaller <br /> drainfield requirements. <br />