Laserfiche WebLink
<br />. <br />. <br />. <br />.' <br />I <br />. <br />. <br />. <br />. <br />.' <br />. <br />. <br />. <br />. <br />I <br />. <br />. <br />. <br />I <br /> <br />n,"'f'~f'5 <br />-' ~ ..... ...J J <br /> <br />APPENDIX C <br /> <br />RAPID SAND INFIL TRA nON SYSTEMS <br /> <br />Rapid Sand Infiltration ("RSI") has proven to be an effective and economical means to <br />renovate secondary effluent. RSI systems consist of a series of shallow, rectangular basins <br />that are utilized on a flood/dry cycle. Secondary effluent enters the soils through basin floors <br />and is polished as it travels downdip through sandy loam and loamy sand soils. The renovated <br />effluent then can be removed from the soils by gravity drainage into a creek bed, or it can be <br />pumped to the surface. The drying cycle rejuvenates the infiltration basins. <br /> <br />Summary and Conclusions <br /> <br />I. RSI systems are proven to be effective and economically viable stages in the <br />complete treatment process of sewage effluent. <br /> <br />2. RSI systems are capable of removing essentially all biodegradable organics, <br />suspended solids, bacteria, and viruses. They also can remove almost all <br />phosphorus and can significantly reduce concentrations of nitrogen and heavy <br />metals. After RSI, the treated effluent should meet or exceed Title 22 California <br />standards for unrestricted irrigation. <br /> <br />3. Properly designed and managed systems produce a clear odorless renovated water <br />that can be used for unrestricted irrigation, primary contact recreation, and other <br />purposes. Potable use would require additional treatment, including activated <br />carbon filtration or reverse osmosis, <br /> <br />C-) <br />