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INFORMATION SHEET ORDER NO. RODNEY AND GAYLA SCHATZ MOKELUMNE RIM VINEYARDS SAN JOAQUIN COUNTY Rodney and Gayla Schatz operate Mokelumne Rim Vineyards at 6200 E. Peltier Road, Acampo. The Discharger developed the winery in 2000. At full build-out, the winery will process approximately 3,000 tons of grapes annually to produce approximately 495,000 gallons of wine. Wastewater is generated in tank cleaning, grape crushing, and equipment/floor cleaning. Although no bottling is presently performed, a mobile contract wine bottling service will perform future bottling, therefore, bottling activities will not generate a high strength waste stream. Domestic wastewater is discharged to a septic tank and leachfield system. The domestic system is regulated by San Joaquin County Environmental Health Department. Process wastewater treatment consists of collection of wastewater in floor drains, discharge to a settling sump, rotary screening, biological treatment in a pond, and land application. Historically, some wastewater was screened and applied directly to 35 acres of vineyard. This Order prohibits discharge of partially treated wastewater. All wastewater must be treated in the wastewater pond. The wastewater does not meet the crop demand for irrigation; therefore supplemental irrigation water will also be applied to the land area. The wastewater pond is equipped with aerators to maintain dissolved oxygen concentration at levels that should control nuisance odors. Combined with the size of the land application area, it is anticipated odors will not be generated by the discharge. Biological treatment is also likely to reduce total nitrogen concentrations and volatile dissolved solids resulting in a lower concentration of TDS discharged to the land application area. The water balance estimates the maximum daily process wastewater flow rate at 5,000 gallons per day (gpd) during the peak grape processing period, with estimated peak daily process flow rates during the off-season of approximately 2,000 gpd. The water balance also assumes that a maximum of 1,650,000 gallons of wastewater will be produced per year. It is anticipated that the cropping activities in the land application area will utilize all the nitrogen applied in the wastewater. Dissolved solids in the wastewater are a concern based on the size of the land application area, and cropping activities. This Order requires preparation of a Salinity Reduction Study to reduce the concentration of dissolved solids in the discharge. Groundwater monitoring is appropriate to ensure that groundwater quality degradation does not take place, as dissolved solids also exist in the supplemental irrigation water and any fertilizer applied to the vineyard. These WDRs establish land application area loading limits, wastewater effluent concentration limits, require submittal of an industrial stormwater application, installation of groundwater monitoring wells, preparation of an operation and maintenance plan, preparation of a salinity reduction study, and regular monitoring of wastewater and groundwater quality. Surface water drainage in the area is to the Mokelumne River. TRO: 1/16/2004