Construction of Giresun Wastewater Treatment Plant  Tender Dossier Volume 3 Employer’s Requirements  Section 1 : Introduction and Existing Condition  10 of 11  1.3.7 Receiving Body  The treated wastewater from the wastewater treatment plant shall be discharged into Black Sea.  Regarding to “Urban Wastewater Treatment Regulation, Communiqué on Sensitive and Less Sensitive  Water”, receiving body where the wastewater of Giresun is discharged is classified as “grey area”.  Most of the cities at East Blacksea Region have difficulties to find the area for WWTP due to  topographical reason and high settlement density on coast. Regarding these aspects, the pretreatment  and deep sea outfall facilities have been still implemented by IlBank and several institutes. Giresun is in the East Black Sea Basin. For wastewater treatment, the nitrogen and phosphorus  removal are proposed as necessary precautions for Giresun-Centre in Annex 7- Table 12 of the  Regulation . The aim of this Regulation is to identify vulnerable water bodies and their sensitive urban  and nitrate sensitive areas in terms of their nutrient elements, to establish the principles and bases  concerned, and to determine the necessary precautions to be taken to improve water quality in  sensitive water bodies.  Furthermore, for Giresun WWTP, the letter of the MoEU stated that “In the case of using the  receiving  body  of  mentioned  area  for  swimming  purpose,  the  advanced  treatment  and  disinfection/deep sea outfall are required”.  The wastewater treatment plant shall be designed and constructed to comply with the discharge  effluent criteria set out in EU Urban Wastewater Treatment Directive (91/271/EEC), Turkish Water  Pollution Control Regulation 1 Urban Wastewater Treatment Regulation$^{2}$, Urban Wastewater  Treatment Regulation, Communiqué on Sensitive and Less Sensitive Water Areas $^{3}$and Regulation on  Identifying Sensitive Water Bodies and Areas Affecting These Bodies and Improving Water Quality$^{4}$. A topographic survey of the wastewater treatment plant site was carried out in March 2017. The Contractor shall familiarise himself with the site conditions before submitting his tender. This  survey is given only for information purpose. The Contractor shall conduct a new topographical  survey for his design works.  A geological and geotechnical survey was carried out in March 2017. The survey report is provided in  Volume 5. In the scope of this survey drilling at a total of 140.00 m depth in 7 locations in the Wastewater  Treatment Plant site and a total of 8.50 m deep 5 pits were drilled. In 5 drilling wells, there are current  alluviums on the top, just below the unqualified fill. In the other two wells, the alluvial floor under  unqualified fill and limestone just below it are observed. In the research pits opened, the current  alluvium was observed in the one and unqualified filling was observed in all other pits. The ground  water level was observed at 4.0 m depth.  1  Entered into force upon being published in the Official Gazette, dated 31 December 2004 and no 25687  2  Entered into force upon being published in the Official Gazette dated 8 January 2006 and no 26047  3  Entered into force upon being published in the Official Gazette, dated 27 June 2009 and no 27271  4  Entered into force upon being published in the Official Gazette No.29927 dated 23.12.2016  1_Vol3_d4 3_Section 1_IntroExisting Condition_GIR_rev8  1.4.2 Geotechnical investigations  1.4.1 Topographical surveys  1.4 Surveys 