31. He also worked as Acting Chief of the Metropolitan Waterworks and Sewerage System Regulatory Office. 32. The installation of a sewerage system marks a milestone in the history of developing Chakar. 33. The company won contracts for railway rolling stock, a sewerage system , trams and agricultural machinery. 34. The major sewerage system for disposal of sullage is through septic tanks and public conveniences. 35. Some cities don't even have a sewerage system ." 36. In the 1880s it was bricked over as part of the emerging storm-water and sewerage system . 37. In the early 1950s, the town obtained a new waterworks, water mains and a sewerage system . 38. Further there are unsatisfactory conditions of sewerage systems . 39. This anomaly was attributed to the closure and replacement of cesspits by the modern sewerage systems . 40. Paris, London, and other large cities saw an investment in their sewerage system during the 1850s.
