The purpose of the ESC is to recover the cost of treating extra strength wastewater discharged into the City of Bend sewer system. Extra strength discharges have a concentration of BOD or TSS higher than the concentration assumed as part of the City’s base sewer user charge. Additional charges to ratepayers for extra strength wastewater are necessary for rate equity and to prevent the high cost of treatment of extra strength wastewater from being passed on to all other ratepayers. [Ord. NS-2242, 2015; Ord. NS-2212, 2014]