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q c j y i T DISTRIBUTION SYSTEM Under certain circumstances, pressure distribution systems may gradually accumulate solids, therefore all such systems should be flushed periodically - typically every two to five years (depending on the system). Flushing of a disposal field distribution system is somewhat complicated in that all flushed effluent must be contained and re -directed into the disposal trenches or septic tank. Disposal field flushing may be best conducted by a qualified contractor. MONITORING WELL AND INSPECTION PIPE INSPECTIONS Pressure dosed septic systems normally include a series of inspection pipes and monitoring wells located in and around the disposal field, These monitoring wells and 'inspection pipes should be inspected two to four times per year; during each inspection the date and depth to water should be noted, as should any other unusual conditions. Water levels in the inspection pipes or monitoring wells which are very near the ground surface, or lush grass growth in an area otherwise dominated by dry grass, may indicate potential problems but do not alone constitute system failure. In such cases the system should be monitored more frequently for clear signs of failure, perhaps once per week until a clear pattern is developed. Signs of septic system failure include discharge of raw (untreated) sewage to the ground surface. If the system is clearly failing (e.g, sewage is present on the ground surface), the installing contractor, the local Health Officer and the designer should be notified immediately, MISCELLANEOUS INSTRUCTIONS Vehicular traffic must be directed away from any component of the system including the tank(s), feed (transport) piping, and the disposal field. In general, surface water (storm water) and roof drainage should be directed away from the tank(s) and disposal field. Grading below the disposal field must be avoided at all times. Grading above and to the sides of the disposal field should be avoided whenever possible and should in no instance be undertaken -~within�10 feet oftheziisposal,field-of any other component of the system. Burying of any component of the system should likewise be avoided. Any erosion damage in the disposal afea -- which may occur at any time during the rainy season -- must be repaired immediately, Monitoring wells and inspection pipes should never be removed, but may be shortened to a level just below the surrounding ground surface as long as a length of re -bar or steel pipe is buried adjacent to the well to allow for future location. MORLAN CIVIL ENGINEERING Water • Wastewater • Drainage Studies - Grading Plans -Site Development • Soil Testing C04 BROADWAY • JACKSON, CALIFORNIA —%642, (2179) 223-1441 Page 3