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7/I- xeriscape landscaping techniques. Public \,,-arks ~aff distribute xeriscape literature at the aIlIlual spring Lime "Natural Resources Expo" sponsored by the Chamber of Commerce, and makes presentations to public meetings on \vater conserving landscaping and lawn watering methods (see Section 6.1). 6.7 Leak Detection and \Vater Audits In cooperation with, and supported by the Ed\vards Underground Water District, the City - established a regularly scheduled leak detection program. The first survey ,,;as conducted in 1989, with additional surveys scheduled every five years. Each survey is about six weeks in length. When leaks are found, repairs are made as soon as possible. The City plans to continue this program, as needed (see Section 6.5). 6.8 \Vastevrater Reuse and Recycling - - The City's Wastewater reuse program includes the following three major components: 1) Use of treated wastewater at the wastewater treatment plant instead of using potable water for in- plant purposes, such as wash down, unit spray bars, and site irrigation; 2) An evaluation of potential for use of treated waste\vater to irrigate city parks and athletic fields, \vith implementation of those elements which can be demonstrated to be feasible; and 3) Evaluating the feasibility of use of that portion of the City's highly treated wastewater that is discharged into the San Marcos River. . With respect to reuse of wastewater at the wastewater treatment plant, the goal is to -- increase from 72,000 gallons per day to 144,000 gallons per day. This, is approximately one percell[ of San Marcos' present average daily water use. In the case of reuse of wastewater for irrigation of athletic fields and airport properties, an assessment will be made of the potential quantities, estimated costs, and environm.e'ntal effects of such projects. Careful attention will be given to avoid aquifer recharge zones, and seepage and drainage from irrigation sites into natural drainage systems. In 1994, San Marcos made application to the TNRCC for two water rights permits \vhich would allow for reuse of the City's return flows. The first application is tòr a "Bed and Banks" permit that would allow San Marcos to divert daily from the San Marcos River downstream of the San Marcos \vastewater outfall, a quantity of water that is equivalent to the quantity of 7