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ENVIRO <br />WASTE SERVICES GROUP <br />Inflow and Infiltration <br />III Study <br />Inflow and infiltration occurs when clean ground water or storm water enters a sewer system through improper <br />connections, cracked pipes, and defective joints. <br />Inflow is the term used to explain when the surface water enters a sewer system through <br />Improper connections of yard, roof, and cellar drains, cracked pipes, holes in manhole covers, catch basins, and <br />cross connections between storm and sanitary sewers. <br />Infiltration occurs when the ground water enters the wastewater system through deteriorated manholes, cracks, and <br />leaks in the joints. <br />After a rain or snow storm the inflow and infiltration sources begin filling up the sanitary sewer systems with clear <br />water. These systems eventually become full resulting in the waste water to flow out at a significantly higher water <br />level. If drains and sanitary fixtures are below this overload level water will be able to flow back through the sanitary <br />sewer pipe. As a result, there will be flooding in homes and manholes will burst open, allowing the wastewater onto <br />the streets. <br />These are the following 3 methods of identifying Inflow and Infiltration: <br />1. Smoke Testing <br />2. Flow Monitoring <br />3. Television Inspection <br />Flow Monitoring is when special measuring devices are inserted into the sewer lines <br />to monitor the amount of water flowing through the wastewater system. <br />Headquarters. 18001 Old Cutler Road, #554, Miami, FL 33157 (877) 637-9665 * F (877) 637-9659 <br />Offices, Miami, FL Orlando, FL * Tampa, FL <br />www.EWSG.com * email: info@ewsg.com <br />