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WASTE DISCHARGE REQUIREMENTS ORDER NO. 10 SPENKER RANCH,INC. JESSIE'S GROVE WINERY SAN JOAQUIN COUNTY 1. The discharge shall be distributed uniformly on adequate acreage in compliance with the Discharge Specifications and Effluent Limitations. 2. Crops shall be grown on the land application area. Crops shall be selected based on nutrient uptake capacity, tolerance to high soil moisture conditions, and consumptive use of water and irrigation requirements. Cropping activities shall be sufficient to take up all the nitrogen applied, and crops shall be harvested and removed from the land on at least an annual basis. 3. Discharge of process wastewater, including runoff, spray or droplets from the irrigation system, shall not occur outside the boundaries of the approved land application area(s). The RWD described wastewater application using sprinkler application; however, flood or drip irrigation is acceptable if the discharge complies with all requirements of this Order. 4. Hydraulic loading of process wastewater and irrigation water shall be at reasonable agronomic rates designed to minimize the percolation of process wastewater and irrigation water below the root zone (i.e., deep percolation). 5. Wastewater conveyance lines shall be clearly marked as such. Process wastewater controllers, valves, etc. shall be affixed with reclaimed water warning signs; quick couplers and sprinkler heads shall be of a type, or secured in such a manner, that permits operation by authorized personnel only. 6. Irrigation systems shall be labeled as containing reclaimed wastewater. If wastewater and irrigation water utilize the same pipeline, then backflow prevention devices shall be installed to protect the potable/irrigation water supply. 7. Application of wastewater to the land application area using sprinkler irrigation is prohibited when wind velocities exceed 30 miles per hour. 8. Public contact with wastewater shall be precluded through such means as fences, signs, and/or irrigation management practices. Signs with proper wording of sufficient size shall be placed at areas of access and around the perimeter of the land application area(s) to alert the public of the use of wastewater. 9. The land application area shall be managed to prevent breeding of mosquitoes. More specifically: a. All applied irrigation water must infiltrate completely within 24 hours. b. Ditches not serving as wildlife habitat should be maintained free of emergent, marginal, and floating vegetation. c. Low pressure pipelines, unpressurized pipelines, and ditches that are accessible to mosquitoes shall not be used to store wastewater. 10. A 50-foot buffer zone shall be maintained between any watercourse and the wetted area produced during irrigation used for process wastewater effluent disposal. 11. A 50-foot buffer zone shall be maintained between any domestic or irrigation well and the wetted area produced during process wastewater application. W:\SUMbrimT%Sm JoaquiMJmsics GrovcUJ—icGmvc WDRdoc