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. , <br /> � ` EXHIBIT A <br /> the composite sewage to meet Federal and State requirements for such <br /> discharge to the receiving waters. <br /> (14) Waters or wastes containing substances which are not amenable <br /> to treatment or reduction by the sewage treatment process employed, or are <br /> amenable to treatment only to such degree that the sewage treatment plant <br /> effluent violates its National Pollutant Discharge Elimination (NPDES) permit or <br /> the receiving water standards established by the Illinois Pollution Control Board <br /> (IPCB). <br /> � (15) Unusual volume of flow or concentration of wastes constituting a <br /> "slug" which is any discharge of water, sewage, or industrial waste which in ' <br /> concentration of any given constituent or in quantity of flow exceeds for any <br /> period of duration longer than 15 minutes, more than 5 times the average 24 ', <br /> hour concentration or flows during normal operation. � <br /> (16) Any trucked or hauled pollutants, except at discharge points <br /> designated by the Sanitary District of Decatur. <br /> (17) Any other substances prohibited by the Sanitary District of <br /> Decatur to its sewer system and sewage treatment plant. <br /> (c) Septic tank and other holding tank wastewater discharges. <br /> (1) No person owning vacuum or"septic tank" pump trucks or other <br /> liquid wastewater transport trucks shall discharge directly or indirectly such <br /> wastewater into a City of Decatur sewer system. <br />