Each principal building (as defined in Section 1240.06(30) of the Planning and Zoning Code) hereafter constructed shall have a separate house sewer. If thermoplastic sewer pipe or flexible thermoplastic sewer pipe is used, there shall be backfill to twelve inches over the top of the pipe in accordance with ASTM D2321 restricted to Class I, II or III embedment materials. Fill materials shall be one-quarter inch to one and one-half inch graded stone, coarse sands and gravel with a maximum particle size of one and one-half inches, or fine sands and clayey gravels. The pipe must be bedded true to line and grade with uniform and continuous support from a firm base. Blocking shall not be used to bring the pipe to grade.
(1977 Code § 6-210; Ord. 89-12. Passed 4-17-89.)