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WASTE DISCHARGE REQUIREMENTS -3- <br /> SEBASTIANI VINEYARDS, INC. <br /> SAN JOAQUIN COUNTY <br /> 13. The constructed wetlands occupy approximately 15 acres and are used for polishing, <br /> storage, and disposal of the treated wastewater. Wastewater is drained through <br /> weirs to the cattail wetland, to the aeration lake,to the bullrush wetland,with final <br /> discharge to the storage lake. The cattail and bullrush wetlands are divided <br /> longitudinally into two sections by a berm. The wetlands are approximately 2 feet <br /> deep with 4 foot deep trenches to promote mixing. An additional 4 acres are <br /> reserved for wetland expansion. The storage lake, which also serves for flow <br /> equalization and flood detention, covers 8 acres (10 feet in depth) and is located <br /> along the western edge of the constructed wetland. <br /> 14. Excess wetland effluent from the storage lake is disposed of by irrigating on-site <br /> landscaping. The total area for landscaping will be reduced from approximately 18 <br /> acres to 6 acres, as crush capacity increases. <br /> 15. Currently, only two of the AIPS and one half section each of the cattail and bullrush <br /> wetlands are used for wastewater treatment. All four AIPS and both sections of the two <br /> wetlands will be used when operations expand to design capacity. <br /> 16. The AIPS and constructed wetlands were designed, installed, and are operated to prevent <br /> breeding of mosquitos. Depth, shape, and drainage factors were addressed in the design. <br /> Operational measures include aeration of the AIPS, debris removal, and maintenance of <br /> mosquito fish colonies in the constructed wetlands. <br /> 17. Stormwater at the TRV East and TRV West facilities are separated from process wastewater <br /> using designed collection/diversion sumps. At the TRV East facility, stormwater is stored <br /> in a 1.2 acre pond at the southern end of the site. Stormwater at the TRV West facility is <br /> diverted to the AIPS during plant operations, or is discharged to the Woodbridge Irrigation <br /> District's Villinger Lateral Canal during periods of non-operation. The Villinger Lateral <br /> Canal is located along the southern boundary of the TRV West facility. <br /> 18. During the crush season, compound concentrations in the winery wastewater will be the <br /> highest,typically in the following ranges: <br /> Compound Units Concentration Ranae <br /> Biochemical Oxygen Demand (BOD) mg/1 750-5,000 <br /> Supsended Solids mg/1 200-800 <br /> pH pH Units 3.0-5.0 <br /> Dissolved Oxygen mg/1 0-9.0 <br /> Nitrate mg/1 5.0-50 <br /> Sulfate mg/1 0-75 <br />