Agenda - 08-18-1987 - Laserfiche WebLink

Browse Search

MANGE WATER AND SCR ]Jr EORI Y CONCERNS AND ANDRWOMMENDATIONS ON THE A BERLY SUBDIVISION PROTECT INCLUDING THE PROPOSED WASTEWATER TREATMENT SYSTEM Introduction Orange Water and Sewer Authority (C]WA.SA) has reviewed revised plans for the Amberly Subdivision project, including preliminary information describing the proposed wastewater disposal system. This 158-lot residential development is planned to be located west of Carrboro, within the University Lake watershed. The project would be adjacent to Morgan.Creek, a major tributary to the lake which serves as the Chapel Hill - Carrboro community's primary drinking water supply. The project will result in increased nonpoint pollution from additional automobile traffic, soil disturbance and other activities. Additionally, the wastewater treatment and disposal system proposed to be utilized could result in adverse impacts on surface and ground water quality. Full assurances must be provided that this development, including=.the.iastewater_disposal..system utilized, will not result in degradation or contamination of public and private drinking water supplies. iASA offers the following comments and recommendations concerning the preliminary plan for wastewater treatment and disposal and the development plan for the Amberly Subdivision. Although these comments have been prepared in response to this development project, some are applicable to all subsurface and alternative wastewater disposal systems in public water supply watersheds. Comments on Wastewater Disposal System: 1. OWASA is not opposed to the utilization of subsurface soil absorption systems in public water supply watersheds where it is fully documented that the system is properly designed and long-term assurances are provided that the system will be well operated and maintained. The information provided on the proposed wastewater disposal system is inadequate to assure the long-term reliability of this system. Much additional investigation is needed. Soils within the project area are categorized as only "provisionally" suitable for wastewater disposal purposes. Furthermore, these soils are located in an environmentally sensitive area- the University Lake public water supply watershed. The proposed locations for primary and backup absorption areas appear to be less than desirable sites for such systems due to slopes and drainage pattern and it may be difficult to orient and maintain trenches parallel to ground contours.