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WASTE DISCHARGE REQUIRE. TS ORDER NO. 5-01-172 2 EAST-SIDE WINERY DBA OAK WGE VINEYARDS' SAN JOAQUIN COUNTY 6. Stillage (distillery wastewater) is discharged to a sump which drains to the shallow ponds (Pond B on Attachment B2). Only stillage wastewater is discharged to the shallow ponds. 7. Wastewater flow is not metered. The Discharger estimates a total flow of 25 million gallons a year, with approximately 70 percent of the wastewater generated during the crush season (August through October) and 30 percent of the water generated the rest of the year. Based on the average: grape crush of 16,000 tons per year, wastewater flows during the crush are estimated to be approximately 82,500 to 165,000 gallons per day. East-Side Winery is evaluating reducing the total flow of wastewater, primarily by treating and recycling cooling water. 8. During wine production, various chemicals are used as either an additive, a fining agent, or as a cleaner/sanitizer. These compounds may include the following: Wine Additive Wine Fining Agent Cleaner/Sanitizes Citric Acid Bentonite Caustic Soda Fumaric Acid Carbon Sodi-am Hypochlorite Malic Acid Copper Sulfate Chlorinated Trisodium Phosphate Tartaric Acid Nylon Polymer Caustic/Wetting Agent Diammonium Phosphate Potassium Bitartrate Potassium Metabisulfite 9. Winery wastewater is currently discharged to the unlined ponds for evaporation and percolation. The approximate capacity of the deep pond is 12 million gallons. The pond is separated into four smaller ponds by interior berms. 10. Stillage is currently discharged to the shallow pond. The approximate capacity of shallow pond is 0.95 million gallons; the shallow pond area is separated into approximately 20 subareas by berms. 11. According to the Discharger, the ponds have never overflowed. Reportedly, the Mokelumne River has flooded the shallow pond area on two occasions. 12. Approximately every three years, the shallow pond has been disced and occasionally scraped to remove accumulated stillage solids. The deep ponds are disced on a yearly basis. This Order requires significant improvements in pond configurations. 13. The Discharger has proposed significant improvements to the wastewater system. All wastewater will be discharged to a lined, mechanically aerated, integrated wastewater treatment pond to be located in a portion of the deep pond area. The remainder of the pond area will be converted to a slow rate land treatment system. The land application area will be operated at agronomic rates. 14. Winery wastewater and stormwater are screened at floor drains prior to discharge to the deep ponds. Screenings are collected and disposed in vineyards or in the wastewater pond area. This Order requires changes in the solid waste disposal practices of the Discharger.