Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 05: Earth Works, Pipe Works and Ground Improvement  2 of 49 5.2.9.2$_{ }$ Placing and Compaction of Fill and Backfill ........................................................ 12$_{ }$ 5.2.9.3$_{ }$ Trial Area of Filling............................................................................................... 13$_{ }$ 5.2.9.4$_{ }$ Filling Adjacent to Structures................................................................................ 13$_{ }$ 5.2.9.5$_{ }$ Tolerances for Filling ............................................................................................ 13$_{ }$ 5.2.9.6$_{ }$ Control and Testing of the Fill .............................................................................. 13$_{ }$ 5.2.9.7$_{ }$ Allowance for Settlement ...................................................................................... 14$_{ }$ 5.2.10$_{ }$ Disposal of Surplus Material ................................................................................. 14$_{ }$ 5.3$_{ }$ Pipe works ............................................................................................................. 14$_{ }$ 5.3.1$_{ }$ General .................................................................................................................. 14$_{ }$ 5.3.2$_{ }$ Standards and rules................................................................................................ 15$_{ }$ 5.3.3$_{ }$ Functional requirements for pipe systems ............................................................. 15$_{ }$ 5.3.3.1$_{ }$ Wastewater system ................................................................................................ 15$_{ }$ 5.3.3.2$_{ }$ Drinking water....................................................................................................... 15$_{ }$ 5.3.3.3$_{ }$ Fire fighting water ................................................................................................. 15$_{ }$ 5.3.3.4$_{ }$ Surface water drainage .......................................................................................... 15$_{ }$ 5.3.3.5$_{ }$ Irrigation system .................................................................................................... 15$_{ }$ 5.3.3.6$_{ }$ Gas system............................................................................................................. 16$_{ }$ 5.3.4$_{ }$ Pipe markers .......................................................................................................... 16$_{ }$ 5.3.5$_{ }$ Pipe materials ........................................................................................................ 16$_{ }$ 5.3.5.1$_{ }$ General .................................................................................................................. 16$_{ }$ 5.3.5.2$_{ }$ Concrete pipes ....................................................................................................... 17$_{ }$ 5.3.5.3$_{ }$ Ductile iron pipes .................................................................................................. 19$_{ }$ 5.3.5.4$_{ }$ Polypropylene (PPRC) pipes ................................................................................. 20$_{ }$ 5.3.5.5$_{ }$ PVC and PP pipes.................................................................................................. 20$_{ }$ 5.3.5.6$_{ }$ High density polyethylene (HDPE) pipes ............................................................. 20$_{ }$ 5.3.5.7$_{ }$ Corrugated HDPE pipes ........................................................................................ 21$_{ }$ 5.3.5.8$_{ }$ Glass fibre reinforced pipes (GRP) ....................................................................... 21$_{ }$ 5.3.5.9$_{ }$ Steel pipes.............................................................................................................. 22$_{ }$ 5.3.6$_{ }$ Transportation of Pipes.......................................................................................... 22$_{ }$ 5.3.7$_{ }$ Storage of Pipes ..................................................................................................... 22$_{ }$ 5.3.8$_{ }$ Inspection of Pipes and Fittings............................................................................. 22$_{ }$ 5.3.9$_{ }$ Pipe Installation ..................................................................................................... 23$_{ }$ 5.3.9.1$_{ }$ General .................................................................................................................. 23$_{ }$ 5.3.9.2$_{ }$ Tolerances.............................................................................................................. 23$_{ }$ 5.3.9.3$_{ }$ Excavation for Pipes in Trenches .......................................................................... 23$_{ }$ 5_Vol3_d4.3_Section 5 Earth and pipe works_en_GIR_rev6.docx 