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<br />REVISED DRAFT <br /> <br />Warehouse <br /> <br />Since wastewater warehouse operations serve both treatment and collection, warehouse costs are <br /> <br />functionalized based upon composite allocation factors. <br /> <br />Billint! and Collectint! <br /> <br />These are costs ass~ciated with meter reading, billing, administration and other functions of the <br /> <br />wastewater utility that are independent of quantity and quality of the wastewater contribution by <br /> <br />a customer. <br /> <br />Sewer Maintenance <br /> <br />Since wastewater flows do not vary significantly except due to infiltration/inflow, which must be <br /> <br />shared by all customers of the system, allocation and distribution of all costs for wastewater <br /> <br />collection may be made among customer classes on the basis of average annual wastewater flow <br /> <br />contribution to the system. All capital costs and operation and maintenance costs associated with <br /> <br />the wastewater collection system should be allocated on the basis of relative percentages of <br /> <br />wastewater flow during the test period. <br /> <br />Wastewater Treatment <br /> <br />Factors affecting wastewater treatment are different and many. <br /> <br />Not only the volume of <br /> <br />wastewater contribution by a class of customer is relevant, but also the quality of the wastewater <br /> <br />is important. Treatment facilities must be designed to meet both the hydraulic loading and the <br /> <br />biochemical loading. <br /> <br />Historically, the City's wastewater utility has measured wastewater <br /> <br />strength in tenDS of three parameters: <br /> <br />a. <br /> <br />BOD (Biological Oxygen Demand) <br /> <br />b. <br /> <br />TSS (Total Suspended Solids) <br /> <br />City of Paris. Te,as <br />Water and WaSlewa/er COSI of Service Study <br />March ZO03 <br /> <br />26 <br />