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Musco Olive Products • <br /> _ 2 _ 0 1 May 2002 <br /> • The water balance shows that approximately 130 million gallons of supplemental irrigation water is <br /> required for the crop during the May through September time period. What is the source and quality <br /> of the supplemental irrigation water? <br /> • The water balances indicate a sprinkler irrigation efficiency of 80-percent. Please describe the fate of <br /> the residual 20-percent of the applied wastewater that presumably is not beneficially used by the <br /> crop. Would it exist as tailwater? How would this volume impact the requested flow rate of <br /> 820,000 gpd? <br /> • The report does not include any specifics on the wastewater application. Please describe the planned <br /> application rate, irrigation frequency, and operational procedures that will be implemented to assure <br /> tailwater runoff is not generated and the one million gallon storage pond doesn't overflow. <br /> • The report does not address biochemical oxygen demand (BOD),nitrogen, or dissolved solids <br /> loading rates. Please describe what measures will be implemented to limit BOD loading rates to <br /> prevent odor generation, maintain nitrogen loading rates below the crop uptake rate, and an <br /> evaluation of the impact of the dissolved solids loading rates on crop health. If crop health is <br /> impacted by the wastewater application,how will the evapotranspiration rate be affected? <br /> • The water balances assume 100-percent irrigation efficiency for the Sudan grass,but only 80-percent <br /> irrigation efficiency for the alternate crop (800,000 GPD Table) and trees (Crop Requirement Table). <br /> Please provide a discussion of the assumptions used in preparation of the water tables. <br /> Please address the items listed above. In order to allow consideration of the increased flow rate at the <br /> 6-7 June 2002 Regional Board meeting, the information must be submitted by 14 May 2002. If you <br /> have any questions about the comments provided,please telephone me at(916) 255-3116. <br /> TIMOTHY7Z. O'BRIEN <br /> Waste Discharge to Land Unit <br /> Lower San Joaquin River Watershed <br /> cc w/enc: Mike Huggins, San Joaquin County Environmental Health Department, Stockton <br /> David Irey, Esq., San Joaquin County District Attorney's Office, Stockton <br /> Mike Campos,Esq., Stoel Rives LLP, Sacramento <br /> Nat Dellavalle, Dellavale Laboratory, Inc., Fresno <br /> Bill Jennings, DeltaKeeper, Stockton <br /> Cr:U'r0Ia1 Filalhi Nlux VO 01 Fa furcmwtl 11011701 Mc <br />