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<br />VII. REVIEW OF WASTEWATER SYSTEM DATA <br /> <br />A. Review of Historical Wastewater Data <br />To determine a comparison of wastewater production to water consumption by the City's water <br />utility customers, available test year data was analyzed for the purpose of thi!>.stl.ldy~ From the <br />test year residential water consumption, water-only (customers with sprinkler meters and septic <br />tanks) consumption was removed. <br /> <br />.... '-, ':-.::::..... ,,' <br /> <br />Commercial contribution to the wastewater system is estimatecffrc)In the commercialanc:iretail <br />industrial water consumption after eliminating the COl1,~uniption of the water-only >~~gounts. <br />Since the commercial and industrial water consumption<e~bibits mitii.Jnal seasonal variation, it is <br />assumed 100 percent of the water consumption of thes~>~tl~tomers is contributed to the <br />wastewater system. <br /> <br />B. Determination of Customer Classes <br /> <br />'.'.'.':' ....>.:..-:..:-: "'''-::',::''::',-; <br /> <br />The City has a special contract with Sara Lec',Vith.respect tg.wastewater discharge. Sara Lee's <br />wastewater rate is not ba~~~()Ilth<::\total cost of~:rvice for the wastewater utility since Sara Lee <br />contributed up-front c~I'ital to reseJ'Ve a certainc~I'~city in the wastewater treatment plant for <br />future use. In Orde,1'tO~~0~gniz~~a.tt1,I..~S'~~~llttact with regard to the cost of service and rate <br />design study, Sara Lee's w~~.l~water volumes were removed from the rate calculation and their <br />revenues>>>,~ierec6gqiz;ed as reveg~e~tIsets. These adjustments help to prevent an overestimate <br />of wastewater billing unit~ and an UIlderestimate of revenues. <br /> <br />For the pUl"p()se of distrikpting the total revenue requirement for the system, the wastewater <br />utility customerslll'e c:livided into two classes: Residential and Commercial. Residential and <br />Commercial custom.ers are assumed to discharge wastewater of normal system strength. Any <br />metered commercial customer that discharges wastewater of strength greater than the criteria set <br />for residential and commercial customers pays for the added cost of treatment required. <br /> <br />City of Paris, Texas <br />Water and Wastewater Cast of Service Study <br />June 2007 <br /> <br />15 <br />