Agenda - 04-21-1998 - 8g - Laserfiche WebLink

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January 5, 1998 Wastewater Management System for Carolina Friends School, Orange County Current System: The school is currently served by a spray irrigation system designed and approved for 4,000 gallons per day by the North Carolina Division of Water Quality (Permit number 0002161). The system is located within the boundaries of the school property and currently treats an average of 2,500 gallons per day. The Current System serves 417 students and 61 staff members. The current system is managed and monitored by Richard M. Davis, an independent Grade IV, wastewater operator. Overview of Proposed Reclamation and Reuse System: The Proposed System is designed to maximize the beneficial use of the water resources of Carolina Friends School concurrent with the protection of public health and the environment. The proposed design is in keeping with the intent of the North Carolina Environmental Management Commission as a part of rules for use of reclaimed water (Administrative Code Section: 15A NCAC 2H .0200•Waste Not Discharged to Surface Water, Amended June 1, 1996). Preliminary discussions concerning the proposed system have been conducted with Mr. Michael Allen, PE of the Division of Water Quality -Non Discharge Group. The Proposed System is designed to accommodate an additional 5 students and 1 staff member for daily use and 200 seat capacity associated with the future soccer and baseball fields. The additional daily flow rate of 2,600 gallons /day includes the sum of the following: (200 seats x 5 gal /seat) — 1,000 gal. /day (5 students x 10 gal. /student) — 50 gallons /day The estimated flow of (Current 2,500 gal /day)+ (Future 1,050 gal /day) -3,550 gal /day is within the limits of 4,000 gollons /day specified on (Permit number 0002161). The design concept utilizes a phased approach to accommodate the changing building infrastructure of the school and will utilize the Current System as operational 'back up ". The Proposed System is designed to reclaim and reuse wastewater for irrigation to forest, soccer field and for the construction of decorative ponds and fountains. The Proposed System is designed to provide for tertiary quality effluent and will include the following treatment processes; (1) aerobic filtration, (2) anaerobic detention (3) disaffection and (4) spray irrigation. Performance results from other systems utilizing thts. treatment train indicate that it will effectively provide tertiary quality effluent that will meet the requirements for use of reclaimed water as specified by the N. C. Administrative Code. Phase I Construction of Multi- Purpose (Gym): Wastewater from the new gymnasium will be treated by the proposed treatment process and spray irrigated into the adjacent __existing forest or-conveyed by underground piping to the Current System. Determination