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" � <br /> „ V1. CONCLUSIONS <br /> The data presented indicates that a septic system for the proposed project must be designed to <br /> the maximum extent for water conservation. With a system of this size, there is always the <br /> possibility of failure. It is recommended that innovative recirculating systems such as the <br /> Orenco System (OSI) be employed to assist in managing septic effluent. Due to the structure <br /> of the on-site soil, the formation of a clogging mat, severe enough to reduce effluent <br /> percolation, is also a possibility. <br /> LIt is also recommended that a portion of the effluent from each of the four restrooms be used <br /> as subsurface irrigation of landscaping around the leachfield areas during the spring and <br /> summer. This process will help alleviate clogging mat formation as well as nitrate loading by <br /> the uptake of nitrate and ammonium ions by ornamental plants, trees and grasses. <br /> Effluent "surfacing” also poses a threat to the leachfields of the project. Each of the four <br /> leachfield absorption trenches should be excavated to native soil and backfilled with engineered <br /> material since there were favorable percolation rates in the deeper (seven to nine ft) depths. <br /> It will be a requirement by the San Joaquin County Environmental Health Department that the <br /> entire septic system for the project be operated under a yearly permit with periodic inspections. <br /> Additionally, there should be assessments and analyses made of leachfield clogging mat <br /> formation, the subsurface irrigation system, and surrounding wells for chloride and nitrate <br /> impact. <br /> The on-site septic tanks should be pumped on a regular basis that is dependant upon usage. <br /> The contractor must notify the Environmental Health Department in writing of any observed <br /> abnormalities. <br /> 13 <br /> valfey qg*sear& <br />