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WASTE DISCHARGE REQUHt wAENTS ORDER NO.R5-2004-0079 2 SPENKER RANCH,INC. JESSIE'S GROVE WINERY SAN JOAQUIN COUNTY 7. Because process wastewater monitoring data for the Discharger's winery is not yet available, the RWD provides typical winery wastewater data based on a published reference. These values are presented below; however, it is noted that other area wineries typically produce wastewater with higher constituent concentrations. Compound Units Concentration Range' Biochemical Oxygen Demand (BOD5)2 mg/L 3,000— 7,000 Suspended Solids mg/L 200- 800 Settleable Solids mg/L 5 - 20 pH Std. Units 3 — 5 Dissolved Oxygen mg/L 0- 9 Total Nitrogen mg/L 5 - 50 Total Phosphorus mg/L 2 - 8 Grease mg/L 5 - 40 Sulfate mg/L 20- 75 Total Dissolved Solids mg/L 500 - 1,000 Inorganic Dissolved Solids mg/L 300- 700 Volatile Dissolved Solids mg/L 200- 700 I Typical chemical analyses of winery wastewater from Fall Creek Engineering, Report of Waste Discharge,February 2004. 2 Five-day,20°Celsius Biochemical Oxygen Demand WASTEWATER SYSTEM 8. Wastewater from winery processes such as tank cleaning, grape crushing, barrel washing, and equipment/floor cleaning will be screened to separate wastewater solids, settled, collected in a 1,000 gallon septic tank, automatically pumped into a water truck, and then manually applied to a 70 acre land application area. The Discharger has purchased, but has not yet installed, a wastewater screen. The wastewater treatment schematic is presented on Attachment B, which is attached hereto and made part of this Order by reference. 9. Stormwater that falls on paved areas and roofs within the winery facility is currently collected and discharged into the wastewater system. The Discharger has proposed installation of a diversion valve to allow stormwater to be diverted to the stormwater retention pond. Such an arrangement requires additional monitoring of stormwater and may prevent the Discharger from operating during precipitation events that exceed the wastewater system handling capacity. Wastewater/ stormwater mixtures are classified as wastewater. 10. A mobile, contract wine bottling service will perform bottling. The bottles arrive at the site already cleaned, and no rinsing occurs prior to filling. Therefore, bottling activities will not generate a high strength waste stream. 11. Based on a hydraulic-analysis, the 70 acre land application area has adequate capacity to accept all wastewater and rainfall (using the 100-year return annual precipitation total). Staff estimates at a wastewater flow rate of 3,500 gallons per day(gpd) the wastewater discharge is less than 1-percent