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3 <br />Memorandum <br />Noah cmolina Pubik Naollh <br />ORANGE COUNTY <br />HEALTH DEPARTMENT <br />Rosemary L. Summers, <br />MPH, DrPH <br />Health Director <br />Richard E. Whiffed Human <br />Services Center <br />300 West Tryon Street <br />Post OfFlce Box 8181 <br />Hillsborough, NC 27278 <br />Phone:(9i9)245-2411 <br />Fax: (919) 649-3007 <br />www co o~ange.nc.us/health <br />Animal Control Services <br />Central Administrative <br />Services <br />Dental Health Services <br />Environmental Health Services <br />Health Promotion and <br />Education Services <br />Personal Health Services <br />306-C Revere Road <br />P O Box 6181 <br />Hillsborough, NC 27278 <br />Phone: (919) 245-2360 <br />FAX: (919) 644-3006 <br />u <br />Z <br />cn <br />v <br />m <br />c <br />v <br />E <br />c <br />0 <br />L_ <br />C <br />W <br />To: Ron I-Ioldway <br />From: Tom IConsler <br />Date: April 12, 2004 <br />Cc: Paul Thames <br />Re: Repair of Wastewater System at the Homestead Center [7.109.26] <br />As you laiow, the septic system at the Homestead Center has failed and is being pumped <br />out periodically through Public Works until it can be replaced. Alan & Greg have <br />evaluated the site and have identified suitable areas in which to construct replacement <br />drainfields. We have reviewed both water usage records and attendance figures for the <br />past year at the center and have come up with a reasonable average desilm flow, but with <br />peak daily flows that will exceed the drainfield capacity if flow equalization is not <br />factored in. <br />Here are the options as I see them: <br />Connect the facility to the OWASA sewer system and abandon the existing <br />septic system. Since sewer is not adjacent to the property, an extension of the <br />sewer main would have to be constructed at the County's expense. Paul Thames <br />estimates a cost in excess of $50,000. While this would be an expensive option, <br />it would afford no limitations on use of the facility in the future with regards to <br />wastewater. <br />Install a conventional system without flow equalization with a daily capacity of <br />51.0 gallons per day. This would translate to a restriction on activities to no more <br />than 102 people per day. Based on past activity at the center, a system of this <br />type would require that restrictions be imposed on use of the facility. The cost <br />estimate of this system would be $5,000. <br />Install a conventional drainfield of 510 gallons per day and dose it from a flow <br />equalization storage tank with atimer-conholled pump. This option is more <br />expensive than Option 3, but would allow for peak usage above 102 people per <br />day provided the total weekly usage is restricted to 715 people per week. This <br />appears to be within the actual weekly usage for the heaviest .3 months of use in <br />2004.. Based on water meter readings and past usage records, this type of <br />system would allow continued use of the facility at its current level. System <br />tracking and Yelemehy would be designed into the system to allow day-to-day <br />monitoring. If actual use is substantially lower than projected use, the data may <br />justify future increase in the facility use. Likewise, it would alert the County to <br />misuse or overuse of the system. A flow equalization system is estimated to cost <br />$12,000 <br />I have already issued the Improvement Permit for the site and am prepared to issue the <br />Carstruction Authorization. First, the County needs to decide which option to pursue on <br />this so that repairs can proceed. Currently sewage backs up into the building and/or <br />