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Grease interceptor means a multi -compartment device that is constructed in different sizes and is generally required to be located outdoors and underground between a FSE and the connection to the sewer system. These devices must be cleaned, maintained, and have the FOG regularly removed and disposed of in a proper manner to be effective. Also referred to as gravity grease interceptor or GGI. Grease removal device means a type of hydro -mechanical grease interceptor that automatically and mechanically removes non -petroleum fats, oils, and grease from the interceptor, the control of which is either automatic or manually initiated. Also referred to as GRD. Grease trap means a grease control device that is used to serve individual fixtures. These have a limited effect and should only be used in those cases where the use of a grease interceptor or other grease control device is determined to be impossible or impracticable. Also referred to as hydro -mechanical grease interceptor or HGI. Hot spots means areas in sewer lines that have experienced sanitary sewer overflows that must be cleaned or maintained frequently to avoid blockages of sewer system, or require maintenance that otherwise would be unnecessary. Inflow means water entering a sewer system through a direct stormwater runoff connection to the sanitary sewer, which may cause an almost immediate increase in wastewater flows. Infiltration means water entering a sewer system, including sewer service connections, from the ground through such means as defective pipes, pipe joints, connections, or manhole walls. Interference means any discharge which, alone or in conjunction with discharges from other sources, inhibits or disrupts the city's sewer system or is a cause of violation of federal or state environmental laws. New construction means any structure planned or under construction for which sewer connection permits have not been issued. Lower sewer lateral means that portion of the sewer lateral that extends from the sewer main to the private property line. Person means any individual, partnership, firm, association, corporation or public agency, including the state and the United States of America. Private sanitary sewer overflow means any surface spill, loss, or discharge of untreated or partially treated wastewater resulting from blockages or other problems within a privately owned sewer lateral. Ordinance No. NS -2921 Page 36 of 57