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FALL CREEK <br /> REPORT OF WASTE DISCHARGE ENGINEERING.INC. <br /> �w 3. WASTE SYSTEMS <br /> `. <br /> 3.1 Combined Process Wastewater and Stormwater Flow Estimates <br /> It is important to quantify both Winery process wastewater and stormwater. These values will be <br /> used when designing a treatment system for the facility. Currently, wastewater flow rates at the <br /> Winery are not metered; therefore, they were estimated using several empirical calculations. <br /> First peak process water was estimated,then monthly process wastewater and storm water flow <br /> �' rates were calculated. Combined flow rates were calculated by adding process wastewater flow <br /> �. estimates to monthly stormwater estimates. <br /> 3.1.1 Peak Process Water Flow Estimates <br /> Wastewater flow rates at the Winery were estimated using the Napa County empirical formula, <br /> which estimates process wastewater flow in relation to annual wine production. Peak winery <br /> wastewater discharge (PD) in gallons per day(gpd) is found using the following formula: <br /> `. PD _ 1.5*WP <br /> 60days <br /> `, where WP is the annual wine production in gallons. <br /> %W The Winery estimates that they produce approximately 170 gallons of wine per ton of grapes <br /> %W processed and under the current expansion plan approximately 390 tons of grapes will be crushed <br /> ` annually. In the 10-year plan, the crush would be increased to approximately 928 tons. Wine <br /> `. production and peak crush wastewater flow estimates for these production level estimates are <br /> shown in Table 3.1. <br /> `,. Table 3.1. Wastewater Flow Estimates <br /> Crush Conversion factor Wine Maximum process <br /> (tons) (gal/ton) (gallons) wastewater(gpd) <br /> 390 170 66,300 1658 <br /> 928 170 157,760 3944 <br /> 3.1.2 Yearly Process Water Flow Estimates <br /> Due to the seasonal nature of the work at a winery, wastewater flows vary monthly depending on <br /> the stage of production. Peak daily wastewater production occurs during the crush(August <br /> through October). Other activities throughout the year such as bottling, barrel washing, and <br /> other cleaning and maintenance activities also generate process wastewater. Table 3.2 shows the <br /> ., anticipated percentage of total annual wastewater expected each month at Jessie's Grove Winery. <br /> The annual flow distribution was derived from a combination of published values (Storm, 2000) <br /> and process wastewater flows measured at other wineries in the Lodi area. <br /> 14. <br /> lkw <br /> JESSIE'S GROVE WINERY 6 FEBRUARY 2004 <br />