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Cal •nia Ronal Water Quality C.-ontrol Board <br /> Central Valley Region <br /> Peter M.Rooney Sacramento Main Office Ed J.Schnabel <br /> Secretaryjor Internet Address: http://ww-w.swrcb.ca.gov/—rwgcb5/home.html Chair <br /> Environmental 3443 Routier Road,Suite A,Sacramento,California 95827 3003 <br /> Protection Phone(916)255-3000•FAX(916)255-3015 <br /> 16 June 1998 <br /> Mr. Jeff Runquist <br /> Rivercrest Vineyards, Inc. <br /> 6303 Beckwith Road <br /> Modesto, CA 95358 <br /> INCOMPLETE REPORT OF WASTE DISCHARGE, RIVERCREST VINEYARDS, RIPON, <br /> SAN JOAQUIN COUNTY <br /> We have reviewed your Report of Waste Discharge (RWD) submittal, received 29 April 1998. <br /> Generally, the proposal must contain greater detail. In order for the RWD to be considered complete, <br /> the following information must be provided: <br /> 1. The EP pond must be designed and sized using both hydraulic and organic loading criteria. Thus, <br /> better wastewater characterization is needed, particularly for Biochemical Oxygen Demand (BODS), <br /> Fixed and Volatile Total Dissolved Solids (TDS), Specific Conductivity (EC), pH, and Nitrate as <br /> Nitrogen(NO3-N). Year-round constituent concentrations and quantities of untreated and treated <br /> wastes (both liquid and solid) must be provided. Toward this end, please provide a production <br /> process flow diagram for all wastestreams. Please incorporate the materials listed in your Appendix <br /> B along with the above six constituents. <br /> 2. An alternative approach to the complete characterization requested above is to use another winery <br /> that is very similar in size and process type, and either generate or use existing data as applicable to <br /> the Rivercrest project. Please provide separate discussions of wet season and dry season operations, <br /> since you plan to comingle stormwater runoff with process wastewater during the rainy seasons. <br /> 3. Please provide more detail on the proposed pretreatment and/or treatment methods. What is the <br /> solids handling plan? Will the wastewater undergo solids removal and pH adjustment? Is the <br /> evaporation and percolation (EP) pond supposed to provide treatment as well as disposal? If so, <br /> please provide design, operation, and maintenance information for the selected type of treatment <br /> pond. Will discharge of wastewater to shallow checks or by vineyard irrigation occur? If so, please <br /> provide applicable information on design, operation, and maintenance of these systems. <br /> 4. The EP pond will handle both storm water and process water. A capacity evaluation must be done <br /> that demonstrates the amount of wastewater/stormwater the disposal facilities can contain. Please <br /> calculate the hydraulic mass balance for the 100-year wet winter. The yearly water balance should <br /> use a minimum of two feet of pond freeboard, however a greater amount may be appropriate for a <br /> large pond, especially if the project is in a windy area. Please use historical rainfall and evaporation <br /> records distributed on an average monthly basis. <br /> California Environmental Protection Agency <br /> CA Recycled Paper <br />