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CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD <br /> CENTRAL VALLEY REGION <br /> CLEANUP AND ABATEMENT ORDER NO. <br /> DRAFT <br /> FOR <br /> ROBERT MONDAVI CORPORATION <br /> ROBERT MONDAVI WINERY <br /> SAN JOAQUIN COUNTY <br /> This Order is issued to Robert Mondavi Corporation (hereafter known as "Discharger") and is based on <br /> provisions of California Water Code Section 13304 which authorize the Regional Water Quality Control <br /> Board, Central Valley Region (hereafter known as Regional Board) to issue a Cleanup and Abatement <br /> (C&A) Order. <br /> The Executive Officer of the Regional Board finds, with respect to the Discharger's acts, or failure to <br /> act, the following: <br /> 1. Waste Discharge Requirements (WDRs) Order No. 87-184 was adopted by the Regional Board on <br /> 23 October 1987 for Robert Mondavi Corporation's Robert Mondavi Winery, located at 5950 East <br /> Woodbridge Road in Acampo, San Joaquin County. The WDRs address the wastewater discharge <br /> associated with winery production activity. <br /> 2. The Discharger owns and operates the facility and is responsible for complying with this <br /> enforcement action. <br /> 3. The winery facility consists of approximately 165 acres. Approximately 100 acres are vineyards, <br /> approximately 57 acres in the northern portion of the site are paved, and approximately 8 acres in <br /> the southern portion of the site contain four facultative process wastewater storage and treatment <br /> ponds. The paved area contains various administrative and processing facilities that are utilized to <br /> produce, bottle, and package a variety of wines. <br /> 4. Sanitary wastewater generated at the facility is discharged to several separate septic <br /> tank/leachfield systems, all of which are located within or adjacent to the paved area. <br /> 5. The facility currently crushes approximately 100,000 tons of grapes per year. The winery operates <br /> year-round. <br /> 6. The facility generates approximately 220,000 gallons of process wastewater per average working <br /> day. Process wastewater consists primarily of crush equipment washwater, general cellar wash <br /> water, spent regenerant from water softening ion exchange units, cooling tower blowdown water, <br /> and storm water runoff from process areas. <br /> 7. Chemicals used during various processing activities that are introduced into the waste stream <br /> include calcium carbonate, calcium hypochlorite, citric acid, ammonia compounds, sodium <br /> hydroxide, trisodium phosphate,biodegradable soap,potassium chloride. The strength of the <br /> wastewater is highly variable depending on the season and operations being conducted at the <br /> winery. <br />