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SEWER SYSTEM EVALUATION SURVEY (SSES) <br />The process by which sources of INFILTRATION and INFLOW are located, quantified <br />and recommended for rehabilitation. An SSES Project typically consists of work phases <br />including: <br />• CONTINUOUS FLOW MONITORING <br />• MANHOLE INSPECTION <br />• SMOKE TESTING/DYE TESTING <br />• FLOW ISOLATION <br />• WET WEATHER INSPECTION <br />• CLEANING/TV 1NSPECTION <br />SMOKE TESTING <br />The process by which smoke (actually Zinc Chloride mist) is introduced into the system <br />under pressure. The method is best used to detect inflow sources such as roof leaders, <br />azea drains, foundation drains, abandoned building sewers, faulty connections, illegal <br />connections and storm drain connections. Smoke should exit the system at the point <br />where INFLOW can enter the system. <br />STRUCTURAL DEFECT <br />A defect that exhibits no EVIDENCE that it has or will LEAK. <br />SUB-BASIN <br />Large drainage areas are divided into smaller areas called SUB-BASINS that typically <br />consist of 6,000 to 20,000 linear feet. These areas aze isolated during flow monitoring in <br />order to determine what portions of the overall system should be further studied. If <br />INFILTRATION is determined to be a problem, then SUB-BASINS are normally further <br />divided into micrasystems consisting of between 1,000 to 6,000 LF. These smaller <br />systems are used for the purpose of conducting FLOW ISOLATION. <br />SWAG <br />A depression or dip in a sanitary collection line. Swags decrease hydraulic efficiency. <br />ADS Environmental Services, Inc. <br />VI-7 <br />