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MINUTES ORANGE COUNTY BOARD OF COMMISSIONERS CONTINUED MEETING AUGUST 22, 1988 The Orange County $oard of Commissioners met on August 22, 1988 at 7:00 in Superior Courtroom, Hillsborough, North Carolina, to continue several items from the August 16th meeting. COUNTY COMMISSIONERS PRESENT: Vice-Chair Moses Carey, Jr., and Commissioners Stephen Halkiotis, John Hartwell and Don Willhoit. COUNTY COMMISSIONER ABSENT: Chair Shirley Marshall. COUNTY ATTORNEY PRESENT: Geoffrey Gledhill. STAFF PRESENT: County Manager John M. Link, Assistant County Manager Albert Kittrell, Clerk to the Board Beverly A, Blythe, Administrative Assistant Joanna Bradshaw, Planners Gene Bell, Emily Crudup, Brad Tongan and Mary Scearbo. REPORT ON THE ALTERNATIVE WASTEWATER TREATMENT STUDY (A copy of the Study is in the Commissioner's Library) This report was listed on the August 16, 1988 agenda and .continued to August 22, 19$8 agenda, The report was given by Don Cordell, engineer with Hazen and Sawyer. His comments are presented in detail below. Mr, Gordell briefly reviewed the background and the scope of the study, The purpose of the study was to review the operating history and performance of alternative wastewater treatment systems with potential application in Orange County, The study was to consider alternative institutional arrangements or public policies that could be implemented by the County to insure a greater reliability in the design, construction and operation of such alternative wastewater systems. For the purposes of the study, the definition of alternative wastewater treatment system consists of three types: (1) conventional package wastewater treatment plant that discharges to a natural water course - this is the one most people are familiar with, (2) land application of treated wastewater and (3) low-pressure injection of wastewater into the soils. The conventional package treatment plant is a premanufactuzed unit that normally consists of all the components contained in larger more complex municipal treatment systems. The package plant removes contaminates from the wastewater through the same process as used in the larger built-in-place plants. Since it does require a discharge to surface water, the capacity of the receiving stream must be considered in siting that type of unit, The second system would be the low pressure ground absorption system, It is a variation of the conventional septic system. Effluent from the septic tank, as opposed to flowing by gravity into a nitrification field, is pumped to some other location where there may be a larger storage tank and from that tank it is pumped under low pressure into the nitrification field, The third system is land application treated wastewater which normally involves a treatment plant of some description either a package treatment plant or a lagoon type system. The treated effluent from those types of plants are sprayed on the land using an irrigation system that is commonly used in agricultural type activities. Locally, the largest such example of land application would be the new treatment facility for the town of Garner, It has the capacity of 4MGD and that is