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%W %W FALL CREEK REPORT OF WASTE DISCHARGE FNCUNFF.RING.INC- 1#4w `. 6. SummARY The following summarize our findings for the proposed wastewater system improvements at WA" Jessie's Grove Winery. `. %0 • The wastewater system at the Winery will be reconfigured to include the following ♦. components: %W 1. Floor drains that catch the process wastewater and storm water from the facility; %W 2. A pump basin to lift water to a new hyperbolic screen; 3. A hyperbolic screen filter(screenings will be either dried and spread on vineyards as a soil amendment or hauled off-site to a landfill); %W 4. A 5,000 gallon dual chambered septic tank; 5. A 0.22 acre subsurface flow wetland; 6. An effluent pump tank and pump system; 7. A 0.6 acre slow rate disposal field(planted in grass); and 8. A 0.18 acre storm water detention area. %W • Wastewater and storm water flow levels under both the current expansion plan and the 10- %1W year expansion plan will be detained in the wetland, grass field, and storm water detention area without overflow during average and 100-year annual rainfall years. 1%W • The wetland and storm water detention area have been designed to provide two (2) feet of �4, freeboard at all times. • The average surface loading rates for BOD is within the range found acceptable for �' subsurface wetlands designed to treat winery process wastewater. %W `, • The concentration of total nitrogen remaining in the treated effluent and applied to the land `. 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 containing nitrogen 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(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. %W Further reduction of IDS is expected to occur in the land disposal area soils. %W `, • 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 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. %W • If the IDS loading 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, %W vineyards and oak woodlands that could receive the wastewater. %,W *or JESSIE'S GROVE WINERY 28 FEBRUARY 2004 1.. %W