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ATTACHMENT D M E M O R A N D U M CI'I2MHILL June 10, 2004 E-mail, Essential Elements of the Methodology TO: Gary Colwell/MWMC Project Manager FROM: Matt Noesen/CH2M HILL Project Manager Debbie Galardi/Galardi Consulting DATE: June 21, 2004 The purpose of this memorandum is to correct some of the information stated in the June 10, 2004, e-mail from Dave Jewett to Roxie Cuellar and David Kelly, Eugene City Councilor. Even though there is no change to the MWMC SDC Methodology or to the resulting SDC rates, we feel that it is important to issue this memorandum to avoid the potential for any future confusion and/or misinterpretation. On May 25, Roxie Cuellar, on behalf of the Lane County Home Builders Association, e- mailed a list of six "items" that they "feel are essential elements that must be included in the SDC methodology." Per Ms. Cuellar's May 25 e-mail, one of these "essential elements" that needed to be part of the SDC Methodology was a calculation that shows how population is converted to dwelling units. An e-mail from Dave Jewett responded to these six items on June 10, 2004. Note that the e-mail response was submitted into the Eugene public record at the June 14, 2004, Public Hearing on MWMC Facilities Plan and SDC Methodology (Item 8). The following is an excerpt from the June 10, 2004, e-mail that addresses the population conversion issue: "B. ISSUES LIST. 1. Population Conversion. The population conversion ratio is part of the computer model that applies the principles set forth in the methodology to determine the residential improvement fee. However, in the spirit of continuing staffs effort's to fulfill information requests submitted by the rate paying public, the conversion from population to single family d~elling units ($FDs) in the SDC model is as follows: 129 gallons per capita per day X $1.7% X 2. 65 = 175 gallon per FEUper day (actual calculated value is 176. 7, but was rounded to the nearest $ gallons) Where: - 129 is the gallons offlow per capita per day derived from 12 years of historical data and used to project wastewater flows in the 2004 Facilities Plan and in the SDC Methodology - $1.7 % is the residential share of the total influent Eugene-Springfield WPCF flow - 2. 65 is the assumed population per household- FEU is flow estimation unit. S0406288-ATTD.DOC 1