Agenda Packet Cc - regular meeting 10/23/1989

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s Preliminary Plat of Fox Bend - Septic System Testing August 22, 1989 Page 4 of 4 General Comments - Each proposed lot appears to have suitable primary and alternate drainfield sites. On some lots, the primary and alternate sites shown are the only possible sites available. On other lots, it is likely that additional testing could find a number of potential sites, allowing additional flexibility in house placement. In each case, drainfield sites have been designed to meet the minimum 20' setback from property lines, and 75' setbacks from designated wetlands. On the majority of lots, extreme caution must be taken during construction of improvements to the property. Road construction will take place within 50' of test-d drainfield sites on at least 6 of 17 lots, and on 2 lots the sites are relatively near the area proposed to be graded to provide a detention basin. I would recommend that each lot have drainfield sites protected by snow fence totally surrounding the drainfield sites at a distance 20' from the boundaries of each drainfield system. Additionally• when road construction plans arA submitted, I would like to revi aw them to determine where road cut would have a potential impact on drainfield sites. Summary - Out of 34 drainfiel% sites test d, 29 require mound systems and 5 would allow a tren -type system. Each lot has primary and alternate sites design -d. It would not be surprising if as many as 20% of the sites timately will have to be re -tested due to the buyer's preference for house sites near or conflicting with drainfields. Some lots are extremely limited for potential drainfield sites, others provide a degree of flexibility in house placement. Given the above facts, concerns, and cons`raints, I would recommend approval of the subdivision as proposed. Accompanying this memo is a topographic survey of the preliminary plat showing potential house locations ind locat:1_ons of both primary and alternate drainfield sites.