Resolutions-1997-021

used upon written approval of mix design by the City Engineer. Sand backfill is not permitted. B. In all other areas backfill shall consist of suitable job excavated material placed in one foot lifts and compacted to 85% Modified Proctor Density. C. The gradation of bedding material shall be compatible with surrounding soils to prevent migration of fines. D. See Table 8.1 and Figure 8.4 for pipe bedding requirements. 8.11 PERFORMANCE & TESTING A. Testing to be performed under the supervision of the City's representative or as otherwise directed by the City Engineer. B. All sewers and manholes will be lamed and visually checked for leakage prior to acceptance. C. All sanitary sewers, including service pipes, will be air-tested using current ASTM standards prior to acceptance. D. All tests will be completed after backfill is complete. E. Polyvinyl Chloride Truss Pipe and PVC Pipe shall have a deflection test conducted after the final backfill has been in place at least 30 days. No pipe shall exceed a deflection of 5%. If the deflection test is to be run using a rigid ball or mandrel, it shall have a diameter equal to 95% of the inside diameter of the pipe and the tests shall be performed without mechanical pulling devices. 8.12 SEWER LOCATION AND EASEMENTS A. Manholes in street right-of-way must be located in areas which allow direct access by maintenance vehicles. Manholes in areas outside the street right-of-way shall be subject to the approval of the City Engineer in which case access to the manhole shall be along a route in which the transverse slope does not exceed 4% and longitudinal slope does not exceed 12%. Placement of sewers in front of yards outside of the right-of-way is discouraged. B. Sewers shall be placed a minimum horizontal distance of 1.5 times the depth from potential or existing building sites. Greater separations are desirable. C. All sanitary sewers outside public right-of-way shall be placed in an easement for operation and maintenance. Easement width from the center of the pipe shall generally be 1.0 times the sewer depth rounded up to the nearest 5 feet. D. The minimum easement width is 15 feet.