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r. FALL CREEK REPORT OF WASTE DISCHARGE F.NGINF.F.RTNG.INC. The results of the mass-balance calculations are summarized in Table 4.6. `' Table 4.6. Estimated Inorganic Dissolved Solids Applied to Land Disposal Area Inorganic Dissolved Solids Concentrations %W Water Year (m /L) Average Water Year Conditions(18.1 in/yr) 275 Wet Water Year Conditions(33 in/yr) 196 L The results indicate that under the current level of operation the discharge of inorganic dissolved solids will be relatively low. Further reduction of IDS is expected to occur due to plant uptake of potassium in the wastewater and from natural cation exchange capacity of the soils. `► 4.4 Conclusions Summarizing our analysis of the proposed wastewater system at Jessie's Grove Winery: • The proposed storm water facility is sufficiently sized to contain runoff and direct rainfall `, resulting from the average annual and 100-year annual rainfall year. %' 0 The average surface loading rates for BOD is within the range found acceptable for `. subsurface wetlands designed to treat winery process wastewater. `' • The concentration of total nitrogen remaining in the treated effluent and applied to the land %W disposal area is projected to be well below the agronomic rate required by the grasses planted in the area. Therefore, the disposal of treated effluent from the constructed wetland will not impair groundwater quality underlying the land disposal area. ' • The total concentration of inorganic dissolved solids (IDS) in the water applied to the land ., disposal area (with the exception of irrigation water) is relatively low and well below the agronomic rates for grasses or other more sensitive crops that could be grown in the area. Further reduction of IDS is expected to occur in the land disposal area soils. `r • Comparing the total IDS concentration applied to the land disposal area over the year to the `, ground water quality objective established for ground water in the San Joaquin Basin set at *AW 450 mg/L, FCE concludes that the discharge of treated effluent to the land disposal area will not impair the beneficial use of ground water underlying the land disposal system. �- • If the IDS loading rate is determined to be too high for the proposed 0.6 acre land disposal ` area, the Winery can apply the water over a larger area. The Winery owns 320 acres of pasture, vineyards and oak woodlands that could receive the wastewater. %W A layout of the proposed system is presented in Figure 4.4. %W ftw JESSIE'S GROVE WINERY 22 FEBRUARY 2004