Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 1 : Introduction and Existing Condition  3 of 11  ORP  Oxygen Reduction Potential  OS  Operating Structure  PDD  Preliminary Design Deliverables PDR  Preliminary Design Report PE  Polyelectrolyte  p.e.  Population Equivalent  PID  Piping and Instrumentation Diagram  PIU  Project Implementation Unit  PLC  Programmable Logic Controller  PP  Polypropylene  PPRC  Polypropylene Random Copolymer  PSC  Project Steering Committee  PVC Polyvinyl Chloride  QA  Quality Assurance Q$_{ww,h}$  Maximum Flow  Q$_{DW,h}$  Design Flow  RAS  Return Activated Sludge  SCADA  Supervisory Control and Data Acquisition  SOR  Standard Oxygen Requirements  SOTE  Standard Oxygen Transfer Efficiency  SS  Suspended Solids  SSOTE  Standard Specific Oxygen Transfer Efficiency T.R.  Republic of Turkey  TEDAŞ  Turkish Electricity Distribution Corporation  TN  Total Nitrogen  TP  Total Phosphorus  TSS  Total Suspended Solids  UPS  Uninterruptible Power Source  UV  Ultraviolet  VFD  Variable Frequency Drive  WAS  Waste Activated Sludge  WWTP  Wastewater Treatment Plant  1_Vol3_d4 3_Section 1_IntroExisting Condition_GIR_rev8 