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manhole walls. By contrast* inflow is water discharged into a <br />sewer system and service connections from such sources as roof <br />leaders* cellar* yard* and area drains* foundation drains* <br />cooling water discharges* drains from springs and swampy areas* <br />Bianhole lids* storm waters* surface run-off* street wash waters* <br />or drainage. Although some infiltration and inflow is inherent <br />in any constructed sewer system* the objectives of reducing <br />excessive infiltration/inflow are* <br />1. The elimination of untreated wastewater bypasses and <br />overflows. <br />2. A lower total cost of treatment works. <br />3. Avoidance of unnecessary treatment works capacity <br />construction. <br />4. The reduction of total wastewater volume which must be <br />treated. <br />The 19tl I/I analysis* completed strictly for the southwest <br />Orono collection system* determined that 32% of the total flow <br />was infiltration/inflow. <br />The study found that two districts within the study area <br />were subject to potentially excessive I/I. These districts «rere <br />analysed from the cost effectiveness of transporting and treating <br />the wastewater versus the location and rehabilitation of I/I <br />sources. It was determined that the cost of locating and <br />rehabilitating the I/I sources would exceed the cost to transport <br />and treat these flews. Based on the conclusions of the report* <br />the following recommendations were madet <br />1. That the City of Orono initiate and carry out a <br />continuous I/I identification and correction program. <br />2. That the City promote public awareness of the <br />illegality and consequenoes of foundation drains discharging <br />to the sanitary sewer system.