annexures - Indian Institute of Technology Roorkee

Chapter - 4 Preparation of Feasibility Report of Sewerage SchemesTable 4.6 Actual Water Quality of the RiverParameters U/S of city D/S of citypHBOD (mg/l)DO (mg/l)Fecal coliform(MPN/100 ml)Comments on river water quality on the basis of the above shall be given.4.11.3 Provisions for River GangaRiver Ganga has been given the status of the National River and the National River Ganga RiverBasin Authority (NGRBA) has been set up. The NGRBA is an empowered planning, financing,monitoring and coordinating authority for the River Ganga for effective abatement of pollutionand conservation of River Ganga in keeping with sustainable development needs.A River Ganga Basin Management Plan is being developed involving exhaustive studies in theentire basin. Works in the River Ganga basin will need to be taken up in accordance with thoseproposed in the management plan.However, in the meanwhile, effluent standards have been made more stringent, for criticalstretches of River Ganga, by the Ministry of Environment, Government of India on 3.2.2010 asin the table given below (Copy of OM dt. 3.2.10 attached as Annexure 3)Table 4.7: Effluent Standards prescribed by NRCD, Ministry of Environment, Government of India:Parameters Units Effluent Standards for discharge intowater bodiesExisting Standards Standardsrevisedon3.2.10(Annexure 3)pH 5.5-9.0BOD mg/l 30 *20 100TSS mg/l 50 *30 200FecalcoliformsMPN/100 ml Desirable– 1,000Permissible– 10,000*or lower depending on the assimilative capacity of the effluent receiving water body4.12 QUANTITY OF WASTE WATEREffluent Standards fordischarge on landDesirable–1,000Permissible – 10,000For sewers, a 30-year design perspective is proposed. Actual flows measured through fieldinvestigations should be projected for this period. Similarly, for STPs and pumping stations,flows should be projected taking into consideration the population of the respective designperiod. The figure arrived at, following the method given in paragraph 6.7, should be adoptedif there is discrepancy between the two projections.38