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224 <br />Memorandum <br />TO: Michael Harvey, Current Planning Supervisor <br />FROM: Kevin Lindley, P, Staff Engineer <br />DATE; May 13, 2011 <br />FEE* Schoolhouse Road Habitat Subdivision Sewer <br />This is a quick memo to discuss the ability of the existing sorer system ire Efland to handle the <br />additional flow ro' ct d from the proposed Habitat for Humanity Subdivision on Schoolhouse <br />Road. The existing McGowan Creek pump station off of Eland -Cedar Grove Road, to which <br />the satire system's wastewater flows, can comfortably handle an average daily flow of 300,000 <br />gallons per day (GP D). The current average daily low from the existing 225 customers of the <br />(land sewer system is between 35,000 and 40,000 GPD, or less than 15% of the capacity of <br />the pump station. The wastewater is pumped to the Town of Hillsborough's wastewater <br />collection system, where it flows by gravity to the Town's wastewater treatment facility. <br />Orange County has a utility connection agreement with the Town of Hillsborough t receive an <br />average of to 380,000 GP . The current flow is roughly 0% of our allotted capacity with <br />the Town of Hillsborough. <br />Based on the proposed 28 residences in the Habitat for Humanity subdivision, the wastewater <br />flow to the Efland system can be estimated to increase by an average of p ro i ately 6,000 <br />GILD. This is based on the current average population in the area of 2.64 people per <br />household, which I've rounded up to 3 people per household. An acceptably conservative <br />estimate of wastewater* usage is 70 GPD per capita. This results in an average of 210 GP <br />per hous6hold, or a total of slightly less than 6000 GP D. This amount represents <br />approximately 2% of the current system capacity and can easily be accommodated by the <br />existing infrastructure. <br />One rote of disclaimer: this analysis is with regards to projected flow only and the capacities of <br />the existing lnfras ru t re. This memo should in no way he construed as approval of the <br />subdivision plan or any planned utility Infrastructure extensions to serve this subdivision, which <br />are st111 under rein, <br />