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Attachment #4 of Exhibit A <br /> Administrative Order No. 58-96-06 <br /> Page 1 of 5 <br /> Based n illable flow data from the regional sewage treatment plant, it was determined <br /> that ap ro imately 47 percent of the total user flow through the plant is attributable to <br /> single-f mi y residential development. It is estimated that a total of 90,000 residential <br /> units (e ist ng plus future) can be accommodated within the urban growth boundary. Of <br /> this am un ,approximately 64 percent (57,600) are estimated to be single-family units. <br /> Based n t ese factors, the estimated capacity of the city's sanitary sewer system is <br /> 122,55 E Us (57,600 DUs/47 percent of user flow). Dividing the non-assessable costs <br /> by the s st m capacity yields a sanitary charge of $473.61 per EDU or $29.60 per <br /> plumbin fi ture unit. <br /> .1 ~1 Rates For New Development <br /> 1.1.1.1 Single Family Dwellings 8 Duplex <br /> For all new single family dwellings the local wastewater charge is the <br /> rate for one EDU. For all new duplex development, the charge is equal <br /> to two times the rate for one EDU. <br /> 1.1.1.2 All other development with wastewater discharge less <br /> than 100,000 gallons per day <br /> i <br /> For all other new development with measured or proposed total flow less <br /> than 100,000 gallons of water discharged per day, the local wastewater <br /> charge is the rate per plumbing fixture unit (PFU) multiplied by the <br /> number of plumbing fixture units in the proposed development. This is <br /> based on an assumed typical single family dwelling having 16 PFUs. <br /> 1.1.1.3 Large Volume Users with wastewater discharge greater <br /> than 100,000 gallons per day <br /> For new development with measured or proposed total flow greater than <br /> 100,000 gallons of water discharged per day, the local wastewater <br /> charge is edual to the total amount of water being discharged per day <br /> (Total Flow), divided by the presumed continuous EDU flow estimate, <br /> multiplied by the rate for one EDU. <br /> The presumed continuous EDU flow estimate (average gallons per day) <br /> represents the assumed daily flow of a typical EDU, if continuous <br /> consumption were to occur over a 24 hour period. The presumed <br /> continuous flow measure is estimated as 600 gallons per day. <br /> <br /> July 01, 1996 I'I Methodologies: City of Eugene Page D-4 <br /> <br />