Orange County NC Website
~- <br />based on treatment plant lagoons with a land application of some 400 acres of <br />distribution ar fields. There are two primary regulatory agencies involved. One <br />agency has a larger role than the other--the North Carolina Division of <br />Environmental Management. They permit construction of all package treatment .-.--~ <br />plants, discharge to surface water, land application treatment plants and most low ~~ <br />pressure injection systems. Low pressure injection systems which are privately <br />owned and do not treat processed water - for instance industrial waste-are ' <br />regulated by the Division of Health Services. Both DEM and DHS have adopted <br />minimum design criteria and other regulations that control the design, construction <br />and operation of the alternative systems. The North Carolina Utility Commission <br />also has a role because many of these facilities are operated by investor owned <br />utility companies licensed under the Utilities Commission. Again, operation by <br />developers or other private entities who do not charge for the service, as well as, <br />Homeowners Association are nat subject to the regulations of the Utility <br />Commission. A major part of the study was the case history review. In summary, <br />eighteen different facilities were looked at in Wake, Durham, Orange and Chatham ~ <br />Counties. Facilities were viewed in this immediate geographic area because at ` <br />least in two of the three systems soil characteristics play a very important role <br />in the. successful performance of the system. Five package treatment plants were <br />looked at, three land application systems and five low pressure injection systems. <br />Cordell then summarized the conclusions and recommendations of the Study. <br />Anticipated growth in Orange County is likely to place increasing demands on the <br />County Commissioners to consider the use of alternative treatment technology. <br />Historically, growth in the County has been encouraged in areas with access to <br />public sewer. As the County continues to grow, development will undoubtedly move <br />into areas where either the soils are marginal and unsuitable for conventional <br />septic systems or inaccessible to existing public sewer systems. Some, if not many <br />of these areas could be served by alternative treatment systems. Based on the case <br />history review, Hazen and Sawyer has concluded that the technology of the systems -.- <br />is sound and can provide a reliable method of wastewater treatment and disposal. <br />Unfortunately, the case history review indicates that this acceptable level of <br />performance is all too often not achieved. Shortcomings with respect to design, '' <br />construction and operation and maintenance of the system has been identified in the <br />report. Although design and construction problems have occurred, there is no <br />question that improper or incomplete operation and maintenance of the systems <br />account for a disproportionate share of reported failures. It is unfortunate that <br />failure of some of the systems overshadows the successful treatment performance of <br />the systems that are operating. They continue to provide a reliable form of <br />wastewater treatment. The successful systems have been well designed by <br />professional engineers with specific expertise and experience. They have been <br />properly constructed by knowledgeable and trained contractors and they are operated <br />by qualified individuals who understand both the technical basis of the design, and <br />implement corrective action, if necessary, to insure continued successful <br />operation. Preventive maintenance and continuous monitoring are also key <br />components of the successful systems. Failing or unsuccessful systems suffer from <br />one ar more problems including inadequate system design that may limit or inhibit <br />performance, poor construction and inadequate operation and maintenance. We <br />believe there are modifications that can be made to the current institutional <br />arrangements and public policies that control alternative systems with the goal of <br />insuring that all of the alternative systems installed realize the success that <br />only a few systems can now demonstrate. While the need to modify the policies may <br />be generally recognized, there is no clear consensus in the field as to how best <br />achieve this result. In hopes of encouraging continued discussion, the report <br />suggested several strategies for consideration by the Commissioners. These are . <br />