A. Sanitary sewers shall be provided of no less than eight inches (8") diameter. Polyvinyl chloride (PVC) pipe, SDR-35 minimum, ASTM D-3034, type PSM with solvent welded joints, ASTM D-2855, or flexible elastomeric seals, ASTM D-3212. The subdivider shall determine the adequacy of the existing system to carry the proposed connected load and future extension. All capacity calculations shall be subject to review by the city engineer.
B. Manholes shall be a minimum of forty eight inches (48") in diameter provided at a spacing not exceeding four hundred feet (400'). Manhole frame and lids shall be closed type with recessed pick hole. All lines shall terminate at manholes.
C. Sanitary sewage pump stations shall match existing systems and be of the separate dry well and wet well type. Screening of sewage influent and standby power systems are required. Sanitary sewage pump stations shall be sized with consideration of the needs of the surrounding developable areas in conjunction with the proposed subdivision.
D. Sanitary sewage force mains shall be constructed of ductile iron pipe of sufficient diameter to minimize operating head conditions and maintain a flushing velocity of three feet (3') per second. Force mains shall be valved at the lift station and provided a system to allow connection of a portable pump for purposes of bypassing the wet well for maintenance.
E. House service connection shall be through standard tee connections laid at thirty degrees (30°) to the vertical. House service connections shall be six inches (6") in diameter. House service laterals shall terminate a minimum three feet (3') inside the property line and be approximately centered on the lot. A minimum elevation difference of three feet (3') shall be required between the crown of the sanitary sewer main and proposed basement floor elevations. House service laterals shall be installed at a minimum slope of eight-tenths of one percent (0.8%) and maximum slope of three percent (3%).
F. No sanitary sewer service line or valve shall be constructed such that the service line runs under and parallel to any driveway. Sanitary sewer service lines may cross beneath driveways, but the skew angle shall be seventy five (75) to one hundred five degrees (105°).
G. Sanitary sewer service lines shall be constructed with a cleanout located not more than five feet (5') from the point of the service line entering the building. (Ord. 530, 3-23-1998)