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Matt Belair - 2 - 20 August 2012 Delicato Family Vineyards 2. Wastewater Treatment and Storaqe: The Amended ROWD states that an aerated wastewater storage pond will be constructed. We understand that the aeration system is intended primarily to control odors, but it will likely reduce the BOD and nitrogen content of the wastewater and retention in the pond will evapoconcentrate salinity constituents to some degree. Please provide projected effluent concentrations for Biological Oxygen Demand (BOD), total nitrogen, and fixed and total dissolved solids (FDS and TDS). 3 Storaqe: The Amended ROWD indicated that "wastewater storage facilities will be constructed that will provide approximately three to four days of storage prior to land application." We also understand that Delicato may wish to construct one or more storm water storage/disposal ponds. Please provide the following information for each pond: a. Identification (name), location, and function of the pond(s). b. Surface area, depth, and volumetric capacity at two feet of freeboard. c. Height (relative to surrounding grade), crest width, interior slope, and exterior slope of each berm or levee. d. Materials used to construct each berm or levee. e. Description of engineered liner, if any. Include a copy of the Construction Quality Assurance (CQA) Plan (or specify that one will be submitted prior to construction). f. Estimated steady state percolation rate for each unlined pond. g. Depth to shallow groundwater below the base and pond inverts. h. Overfilling/overflow prevention features. i. Operation and maintenance procedures. We recommend that the wastewater storage pond include a Geosynthetic liner. If Delicato prefers not to install a pond liner, the Antidegradation analysis must be revised to address the additional threat to groundwater quality. 4. Water Balance: Water balance calculations must demonstrate that sufficient storage capacity can be provided to accommodate process flow and storm water from a 100-year annual precipitation event. Although the Amended ROWD provides anticipated hydraulic loading rate calculations, we understand that these estimates were generated without knowledge of the storage pond design. Please provide a revised water balance demonstrating adequate storage and disposal capacity for both the average rainfall year and the 100-year return period annual total precipitation based on the following: a. Proposed storage pond geometry. b. Current and future wastewater, storm water, and supplemental irrigation flows distributed monthly in accordance with expected/historical monthly flow rates. c. A minimum of two feet of freeboard in each pond at all times. d. Historical local evapotranspiration, pan evaporation, and lake evaporation data (monthly average values). e. Crop coefficients for the crops that will be grown (this can be simplified by using the lowest water demand crops for the water balance) f. Local precipitation data with the 100-year return period annual total distributed monthly in accordance with mean monthly precipitation patterns.