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Mr. Paul Wilms <br /> July 17, 1987 <br /> Page TWo <br /> Although these comments have been prepared in response to this development <br /> project, some are applicable to all alternative wastewater disposal systems <br /> in public water supply watersheds. Careful consideration must be given to <br /> the potential water quality impacts of various alternative methods of <br /> providing wastewater treatment and disposal services within protected water <br /> supply watersheds. Present regulations do not differentiate between systems <br /> within protected watershed areas as opposed to those without. C]WASA staff <br /> recommends that all alternative wastewater treatment systems located within <br /> an existing or proposed WS-I or NS-II watershed be constructed with dual or <br /> alternating drainfield or absorption areas. This requirement should be <br /> applicable to all alternative systems, including, but not limited to, <br /> individual and community septic tanks and nitrification drainfield systems, <br /> mound systems and spray irrigation systems. <br /> (MASA staff also recommends that the Division of Environmental Management <br /> also provide notification to the appropriate. raterlsuppZ putVeyox-.wh1Ui ' <br /> utilizes water from the WS-I or WS-II watershed in which an alternative <br /> wastewater disposal systa.n is proposed to be constructed. A tri-party <br /> agreement should be required prior to approval of a pennit for such a <br /> system, as is required for package plant discharges. <br /> Your consideration of the above comments and recommendations and continuing <br /> assistance is greatly appreciated. As additional information is received <br /> and reviewed, MASA may provide further comments to your office. Please do <br /> not hesitate to contact Patrick Davis or me if you have any questions <br /> concerning the enclosed report. <br /> Very truly yours, <br /> e <br /> Everett Billingsley <br /> Executive. Director <br /> wp <br /> Enclosure <br /> cc: NASA Board of Directors <br /> Robert Holman, Division of Environmental Management <br /> Tony Laws, Orange County Health Department <br /> Arthur Mouberry, Division of Environmental Management <br /> Dennis Ramsey, Division of Environmental Management <br /> Robert Van Tilburg, Regional Supervisor, Raleigh Regional Office, NCDEM <br /> Wallace venrick, Division of Health Services <br />