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WASTE DISCHARGE REQUIREMENTS ORDER R5-2013-0028 -25- <br /> DELICATO VINEYARDS, INC. <br /> DELICATO FAMILY VINEYARDS <br /> SAN JOAQUIN COUNTY <br /> achieved. Therefore, this Order requires that the Discharger complete a post- <br /> source control salinity reduction evaluation to quantify the benefits achieved by <br /> salinity reduction measures previously implemented and provide a feasibility <br /> analysis of additional reduction measures. It should be noted that water <br /> conservation measures typically concentrate salinity constituents in wastewater, <br /> thus salinity reduction measures may not be reflected in wastewater monitoring <br /> data, but rather in reduced mass loading rates to the LAAs. <br /> 84. The proposed modifications to the land application system, which are required by <br /> this Order, will incorporate the following treatment and control: <br /> a. The existing unlined wastewater ponds will be abandoned. <br /> b. The LAAs will increase from 23 acres of uncropped LAAs that received water, <br /> decomposable organic matter, and nutrients well in excess of the soil's <br /> assimilative capacity to 130 acres of cropped LAAs which will receive nutrients <br /> and water at agronomic rates. <br /> c. Process wastewater will receive some treatment prior to discharge. Reduced <br /> BOD Loading rates will also alleviate potentially reducing conditions in the <br /> LAAs, thereby reducing the threat of degradation from manganese. <br /> d. Double cropping is proposed for LAAs to provide a crop canopy for most of the <br /> year. This practice will reduce water loss by evapotranspiration and also result <br /> in higher removal rates for both TDS and nitrogen. Double cropping has been <br /> documented to result in high uptake of salinity constituents in other wastewater <br /> land application areas. <br /> e. Cover cropping in the vineyards is a benefit for winter irrigation management <br /> and benefits vineyard soil vitality by improving nutrient uptake during the winter <br /> months. <br /> f. Salinity source reduction; <br /> g. The use of lined wastewater ponds for flow equalization and short-term <br /> storage; <br /> h. Collection of winery storm water to prevent runoff to surface waters; <br /> i. Land application of wastewater at agronomic rates for water and plant <br /> nutrients; <br /> j. Using high quality supplemental irrigation water to maximize crop yield; and <br /> k. Utilizing tailwater and storm water runoff control systems on all LAAs. <br /> These measures constitute best practical treatment and control sufficient to justify <br /> the groundwater degradation that is allowed by this Order. <br />