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WASTE DISCHARGE REQUIREMENTS ORDER NO.R5-2002-0034 3 SUTTER HOME WINERY LODI FACILITY,SAN JOAQUIN COUNTY 13. The wastewater ponds are underlain with a two foot thick clay liner designed to reduce infiltration of wastewater. No details have been provided regarding the estimated or actual hydraulic conductivity of the liner. 14. Allowing two feet of freeboard, the two wastewater ponds provide a total of 1.23 million gallons _.: (`Mgal).storage. Pond.No-..l.provides 0:765-Mga1;'-and Pond No:-2-provides•0.465 Mgal.-of- storage. Wastewater retention time is anticipated to be approximately 97 days, with 60 days retention time in Pond No. 1. 1.5. The water balance contained in.the RWD shows the wastewater ponds have sufficient capacity to accommodate allowable wastewater flow, design seasonal precipitation for a 100 year return period, and ancillary inflow and infiltration. 16. Wine wastewater may range in H value from 2.5 to 9.5 standard units. The R Winery Y g p WD states that the combination of naturally occurring alkalinity in the source water, and the caustic cleaning compounds used in the winery should maintain pond pH above 6.5. This Order limits the pH of wastewater discharged from the wastewater ponds to a range of 6.5 to 8.5 standard units. As described in Provision G4, if the monthly monitoring shows that the pH does not comply with the Order limits, then the Discharger will be required to install a pH neutralization system. LAND APPLICATION SYSTEM 17. Wastewater will be spray irrigated in the 15.5 acre land application area. The location of the land application area is presented on Attachment B. Flood irrigation using wastewater is acceptable if it complies with the "Land Application Requirements"of this Order, and if the land application area has been adequately prepared to receive wastewater. 18. A perennial grass crop will be grown and harvested at the 15.5 acre land application area. The Discharger anticipates supplemental irrigation water will be required for crop health in all months except from November to March. The ponds are designed for retention of wastewater and rainwater through the majority of the rainy season with minimal discharges to the land application area. Other crops may be acceptable as long as they take up all nitrogen applied as described by Effluent Limitation C.1 and Land Application Area Requirement D.2. 19. Application of wastewater to the land application area will occur year round, including the wet season. If wastewater is not applied at an agronomic rate, then pollutants may be leached from soil during rain events. Therefore, this Order prohibits irrigation with wastewater 24 hours - before, during, or.24 hours after a rain event, or when soils are saturated. 20. The RWD estimates the TDS concentration in the treated effluent to be approximately 2,300 mg/L. Excessive application of TDS to the land application area can result in the accumulation of TDS in the soil column and subsequent migration to the underlying groundwater. The RWD estimates approximately 7,075 lbs/ac•ycar of TDS will be applied to the land application area. This Order requires the Discharger to monitor groundwater quality at the wastewater ponds, stormwater storage pond, and land application area. The Discharger submitted a TDS balance in the RWD that shows a projected TDS concentration of 14 mg/L in the percolate.