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`, FALL CREEK REPORT OF WASTE DISCHARGE FNC:TNFFRTNG.TNC:. �. Table 4.5. Comparison of Potential Grass Nitrogen Uptake to Total Nitrogen Applied from Process Wastewater and Storm Water L (after Pettygrove and Asano, 1985) %W Total N Uptake Total N Total Nitrogen Acres in Representative Yield (Ib/ton of Uptake Applied after Crop Production Yield ton/acre ton ield (lbs) Wetland Ib/acre Grass 0.6 4 2.4 63 151 39 4.3.5 Inorganic Dissolved Solids %W FCE has estimated the potential concentration of inorganic dissolved solids (IDS) applied to the `, 0.6 land disposal system. The final IDS concentration is calculated using mass-balance ` calculations that account for the amount of water applied from the various sources (wastewater, storm water, direct rainfall) and the associated IDS concentration contained in each source of water. The analysis does not account for supplemental irrigation water that may be applied to %W the land disposal area during the late spring and early summer when the treated effluent may not `. provide for an adequate supply of irrigation water to the area. This supplemental water will further reduce the concentration of IDS applied to the area. A copy of the calculations is presented in Appendix B. The following describes the information used in the analysis. Wastewater Quantity and IDS Concentration. The total volume of process wastewater estimated for the facility used in the analysis is based on current production levels estimated at 0.2 millions gallons per year. The average IDS concentration from the treatment wetland is %W assumed to be 660 mg/L. This value was used based on average IDS values measured at other %a, Central Valley Wineries (700 mg/L) and adjusted slightly to account for expected percent removal of sodium and potassium in the treatment wetland. Although, Kadlec and Knight(1996) report percent removal rates for sodium and potassium at approximately 9 and 45 percent, respectively, FCE assumed sodium and potassium removal rates of 5 and 30 percent, %W respectively. `- Storm Water Quantity and IDS Concentration. The total volume of storm water runoff that will enter the wetland and enter the land disposal area for both average annual and 100-year rainfall years was used in the mass-balance calculations and equal to approximately 0.52 and %W 0.92 million gallons per year, respectively. Virtually no data is published for IDS concentrations �w in storm water runoff, so FCE assumed that the IDS concentration in the storm water runoff is 160 mg/L,which is equivalent to low strength wastewater reported by Metcalf&Eddy (2003). %W Direct Rainfall Quantity and IDS Concentration. The total volume of direct rainfall that falls `, on both the wetland and land disposal areas was also included in the analysis. The IDS concentration was assumed to be 40 mg/L based on rainfall data reported by Hem(1985). Evaporation Volume. Over the course of the year a substantial volume of water in the wetlands ., will be lost that could potential result in concentrating IDS in the wetland. FCE accounted for %W this loss in the calculation by subtracting the volume of water loss to evapo-transpiration in the wetland. JESSIE'S GROVE WINERY 21 FEBRUARY 2004 %W