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WASTE DISCHARGE REQUIRE^%-,INTS ORDER NO.R5-2004-0079 9 SPENKER RANCH, INC. JESSIE'S GROVE WINERY SAN JOAQUIN COUNTY 11. No physical connection shall exist between wastewater piping and any domestic water supply or other domestic/industrial supply well without an air gap or approved reduced pressure device. 12. The wastewater treatment and land application system shall have sufficient capacity to accommodate wastewater flow and seasonal precipitation. Design seasonal precipitation shall be based on total annual precipitation using a return period of 100 years, distributed monthly in accordance with historical rainfall patterns. C. Effluent Limitations: 1. As of 2 September 2004, wastewater discharged to land shall not exceed the following monthly average effluent limits, or lower concentrations as the Discharger determines necessary to ensure compliance with the Groundwater Limitations: Constituent Units Concentration Total Dissolved Solids mg/L 2,000 2. As of 2 September 2004, wastewater applied to land shall not exceed the following loading rates, or lower loading rates as the Discharger determines necessary to ensure compliance with the Groundwater Limitations: Loading Rate Constituent Units Maximum 7-da- Average BOD mg/L 350 lbs/ac-day 100 lbs/ac-day Total Dissolved Solids mg/L 500 lbs/ac-year Not Applicable Total Nitrogen mg/L 150 lbs/ac-year Not Applicable 3. Wastewater discharged to the land application area shall not have a pH of less than 6.5 or greater than 8.4. D. Land Application Area Requirements 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). Wastewater application from the back of a truck, or using sprinklers, flood, or drip irrigation is acceptable if the discharge complies with all requirements of this Order.