(A) All building sewers shall be laid on a grade of not less than three and sixteen-hundredths inch per foot for four-inch pipe and of not less than one-eighth inch per foot for six-inch pipe.
(B) If the grade of the building or side sewer is to be less than three and sixteen-hundredths inch per foot for four-inch pipe or one-eighth inch per foot for six-inch pipe, the property owner shall sign and acknowledge a grade release in a form approved by the city, the effect of which shall be to release the city from all future claims for damages due to the installation of the sewer. If there is doubt about grade, a grade release shall be procured before the pipe is laid. If, upon inspection, the grade is inadequate, the grade release shall be filed in the office of the City Recorder/Administrator before any backfilling takes place.
(C) All materials, pipes, and fittings used in the construction of effluent sewer lines on private property must meet published specifications of good construction as specified by the Sanitation Manager to prevent leakage and infiltration into the system.
(D) Pressure piping, fittings, and cleanouts shall be Class 160 (SDR 26) pressure-rated PVC piping with rubber gasket joints conforming to ASTM D 1784 and ASTM D 2241. Pipings and fittings for pressure sewer service lines shall be Class 160 (SDR 26) pressure-rated PVC piping with rubber gasket joints conforming to ASTM D 1784 and ASTM D 2241, or polyethylene piping, pressure Class 160 (SDR 26) conforming to ASTM D 2122.
(E) Interceptor tanks shall be of concrete construction from a supplier approved by the city. The city shall keep on file at all times currently approved manufacturer and/or supplier of approved interceptor tanks with their current prices as per agreement with the city.
(F) Minimum interceptor tank sizes shall be 1,000 gallons per residence. Minimum interceptor tank sized for businesses or multi-residences shall be in accordance with requirements set forth by the Department of Environmental Quality, the requirements to be on file with the city.
(Prior Code, § 50.10) (Ord. 420, passed 10-5-1987)