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42 <br />IioM~ CaroiFa Ru6Bc NtiML <br />ORANGE COUNTY <br />FtEALTH DEPARTMENT <br />Rosemary L Summers, <br />MPH, DrPH <br />Health Director <br />Richard E. Whiffed Human <br />Services Center <br />300 WestTryon Street <br />Post OfFice Box 8181 <br />Hfilisborough, NC 27278 <br />Phone: (919) 245-2411 <br />Fax: (919) G44-3Q07 <br />www m ocanve ~ ~rclhealth <br /> <br />Central Administrative <br />Services <br />Dental Health Seniices <br />Ernironmental Health <br />Services <br />Health Promotion and <br />Education Servkes <br />Personal Health Services <br /> <br />~' <br />306{ Revere Road ~ <br />POBox8181 <br />Hillsborough, NC 27278 a~i <br /> z <br /> <br />Phone: (919) 245-2360 a~i <br />FAX: (919) 644-3006 = <br /> r? <br />. <br /> ~ <br /> w <br />MEMORANDUM <br />To: Michael Harvey, Zoning Enforcement Officer <br />From: Andy Adams, Environmental Health Supervisor <br />Date: April 21, 2008 <br />Re: Montessori school proposal at 711 Terry Rd., Hillsborough, NC <br />TMBL: 5.10..22 <br />Following the Development Review committee meeting on Thursday, Apri118°i, I have <br />the following comments: <br />1. The Montessori school as proposed would have 100 students and 11 employees. <br />There are no shower ar food preparation facilities proposed for the school. There <br />would also be a caretaker apartment on the property. <br />2. The wastewater design flow for the school would be 10 gallons per person per <br />day, or 1110 gaIlons per day. <br />3. The drainfield area as proposed is inadequate in size. For the purpose of our <br />discussion, assume site evaluations show that the soil has a .3 long term <br />acceptance rate (LTAR) NOTE: Lower L'TAR's will result in larger drain-fields <br />and more land area needed: <br />a. There would need to be 1235 linear feet of drainfield for the initial <br />system. This will require an estimated 11,000 to 13,500 square feet of <br />land area to install. <br />b.. An additional 11,000 to 13,500 square feet would be held in reserve for <br />the system replacement area, resulting in a total of approximately 22,000 <br />to 27,000 square feet. needed for initial and replacement areas for the <br />school system (depending upon how the contours of the land are <br />oriented). <br />4. The caretaker apartment is assumed to be a one ortwo-bedroom proposal (240 <br />gallon per day flow). Assuming the same .3 LTAR: <br />a. There would need to be 2741inear feet of drainfield with the same <br />required for the system replacements A total estimated land area of 5000 <br />to 6000 square feet would be needed for the initial and replacement <br />system areas for the care taker house. <br />5. Additional site considerations: <br />a. Livestock activities would not be allowed over the system and system <br />replacement land areas. They would need to be fenced for protection. <br />b. The well wiIl be anon-community, non-transient Public Water Supply. <br />I advise the applicants to contact Public Water Supply's Raleigh <br />Regional Office (919-791-4200) for siting advice and sampling <br />requirements. A permit for the well would be issued by Orange County <br />Environmental Health in collaboration with Public Water Supply. . <br />a Septic systems will need to maintain setback distances of 50 feet to <br />irrigation ponds. <br />