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Comprehensive Plan <br />Sanitary Sewer Sub -Element <br />feet of trench drainfield. Commercial septic tanks systems vary depending on estimated water <br />use. , . Since effluent from septic tanks is discharged to a drainfield <br />where it ' percolates into the soil, soil permeability and depth to the water table are <br />limiting factors for septic tank -5 sem use. To ensure adequate performance and protection of <br />groundwater quality, elevation of septic .kw&l s• them drainfields is.often required. All OSTDS <br />(septic system) permitting is done by the Florida Department of Health in Indian River CountX. <br />(DOH -Indian River <br />According to the IF�'T1T`, Tai n Diver- Camey -DOH-Indian River it is challenging to4&-a <br />diffie �t-permit septic systems installations in the "county mere <br />aredue to several factors whieh aeeountfer-tkis-di ou hese-€aeter-s-areincludina:: <br />0--a higl wet season water table of Tess than 104nches as described in the USDA <br />Soil Survey . ; and <br />the presence of restrictive low permeable.soil strata; <br />platted or recorded parcels less than %2 acre; and <br />• setbacks from surface waters and/or wells. <br />kVIAP" <br />Now <br />The areas of the county having' Excessively Drained Soils" and "Moderately Drained Soils are <br />better suited for septic tamsystems. As shown on Figure 3.E.1 of the Stormwater Manag6me <br />Sub -Element, even" these. two soil types have limitations with respect to septic tank -system <br />suitability. While moderately drained soils have a severe limitation rating for septic "tank -system <br />suitability, excessively drained soils percolate so rapidly that they provide very poor filtration. <br />Septic tanks systems on these soils have a potential for causing groundwater contamination. <br />Areas of excessively drained soils in Indian River County are tvnically adiacent to waterbodies <br />including canals, St. Sebastian. River, and the Indian River Lagoon. <br />The Florida Department of Health (DOH) establishes the rules for. septic <br />system Mnitti,n&--'quirvs . di . at a septie tank system have a nainimum of 42 inehe� 6f well <br />Community Development Department Indian River County 20 <br />Appendix A <br />