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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD CENTRAL VALLEY REGION ORDER NO. WASTE DISCHARGE REQUIREMENTS SEBASTIANI VINEYARDS SAN JOAQUIN COUNTY The California Regional Water Quality Control Board, Central Valley Region, (hereafter �j Board) finds that: u 1. Sebastiani Vineyards (hereafter Discharger) submitted a Report of Waste Discharge, dated 2 Novmber 1989. The property (Assessor's Parcel No(s) 025-120-05 and 025- 120-01) is owned by the Discharger. 2. Waste Discharge Requirements Order No. 58-551, adopted by the Board on 21 November 1958, prescribes requirements for a discharge of cooling water, wash water, and stillage wastes from Sebastiani Vineyards to land. 3. Order No. 58-551 is neither adequate nor consistent with current plans and policies of the Board. 4. The Discharger discharges an average of 90,000 gallons per day (gpd) of cooling water, wash water, and stillage wastes to 62 acres of checks for evaporation and percolation. Maximum discharge occurs August through October. 5. The Report of Waste Discharge describes the discharge as follows: Average Flow: 90,000 gpd Maximum Flow: 100,000 gpd II u 6. The facility is in Section 1, T3N. RSE, MDB&M, with surface water drainage to Sycamore Slough, tributary to South Fork Mokelumne River, as shown in Attachment A, which is attached hereto and part of the Order by reference. 7. The Board adopted a Water Quality Control Plan, Second Edition, for the Sacramen- to-San Joaquin River Basin (513), which contains water quality objectives for all waters of the Basin. These requirements implement the Basin Plan. 8. The beneficial uses of South Fork River and its tributaries are municipal, industrial, and agricultural supply; recreation; esthetic enjoyment; navigation; ground water recharge: fresh water replenishment; hydropower generation: and preservation and enhancement of fish, wildlife, and other aquatic resources.