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000110 <br /> ( ( <br /> 5 <br /> condition is slow rate spray irrigation. The instantaneous application rate should <br /> not exceed .3 to 35 inches per hour and waste application should be accomplished no <br /> more than 2* to 3 hours per week. Waste application should be.accomplished no more <br /> frequently than once every week. The application of wastewater onto the soil surface <br /> should not exceed (the recommendations provided in the water balance calculation. The <br /> water balance caictklation allows for an application of 41.54 inches of water per acre <br /> year. This is the equivalent to approximately .8 inches of water/acre/week. If <br /> applications are maintained at .3 to .35 inches per hour and waste application is <br /> accomplished no mo e than 3 hours per irrigation event, then this will provide a <br /> satisfactory method for handling wastewater. During periods of excessively dry <br /> weather, the waste application could be accomplished more frequently than once per <br /> week. The water balance calculation is based on an worst rainfall condition <br /> encountered over a 10-year period. This condition is not indicative of the rainfall <br /> in the county and ome adjustments can be made to the waste application to allow for <br /> these variations in antecedent soil moisture and rainfall. <br /> Slow rate spray irrigation is the most accepted and tested method for land <br /> treatment. It is well suited to a variety of conditions. The spray irrigation <br /> system can be designed to achieve high levels of waste treatment at a minimum of <br /> cost. The vegetation selected for growth on the site must be capable of removing <br /> nutrients from the waste stream and of transpiring water. Both forage and forest <br /> crops are ideally suited for meeting these requirements. The nutrient removal <br /> potential, however, of a forested system is somewhat limited. Further, the crop <br /> grown on any irrigation system must be removed to remove the nutrients which have <br /> been applied to the soil. The removal potential for a forested crop is reasonably <br /> high just as is the nutrient removal potential for a forage crop. Unfortunately, <br />