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<br />_ • Medium Residential Category - the group of residential customers who have more than 1,000 and <br />less than 3,000 square feet of estimated building foot print: Duplexes <br />. with a total foot print of more than 2,000 and less than 6,000 square <br />feet will be treated as two medium residential properties. <br />• Stormwater -- Water from. precipitation, surface or subterranean water from any source which <br />does not contain wastewater, drainage. <br />• General Storm Customers -- all customers who are not in the Small or Medium Residential <br />Categories. <br />• Impervious Surface -- any hard surface area that causes water to run offthe surface in greater <br />quantities or at an increased rate of flow from conditions pre-existing to <br />development. Common impervious surfaces include, but are not limited <br />to, rooftops, walkways, driveways, parking lots and concrete surface or <br />asphalt paving: <br />• Administrative Costs -- stormwater system costs that do not vary by the amount of impervious <br />surface belonging. to a customer. These costs are customer or account <br />driven as opposed to stormwater discharge based. An example is billing <br />costs. <br />• Direct or Indirect Discharge to the Stormwater System-- movement of stormwater from <br />private property to. a public storm drainage facility. This includes, but <br />is not limited to, pipe connections, ditches, and sheet flow (i.e. runoff <br />from impervious, surfaces which is not contained on site and which . <br />may flow on or over. the surface of the ground, does not contain <br />wastewater, .and ultimately discharges to a public storm drainage <br />facility)- <br />• Equivalent Service Unit (ESU) -- defined as 1,000 square feet of impervious area and used as the <br />basis for .calculating the stormwater service charge for a <br />customer.,`"-.: <br />~r~, ~ i s <br />• Reduction - a decrease ins,; ~m a ~ the quantity and quality components of customers'. <br />fees. The amount of the reduction is based on the amount customers reduce their <br />discharge to the public.stormwater system. <br />-.ea ecl Co ~o a '~ r~ c~osis~ir ablc}~i, ~p n~fou ~ r~`~~o :e = <br />co ~rci~~rcd titorn~ clraina~~~ far~liti~s. ~11(tc~i~~~zrate'~st.<~mcr '~r~e <br />fi,~~~,~t:l~c street netwoi:}~ an<l ~harc tlarsc ~~u~ts <br />5.0 Method For Determining Stormwater Service Charges <br />The method for determining an individual customer's charge is based on a rate structure that applies <br />Stormwater Service Charge: Methodology Paper -Page 3 <br />Draft Revisions -April 10, 1995 <br />