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WASTE DISCHARGE REQUIREMENTS ORDER R5-2013-0028 -11- DELICATO VINEYARDS, INC. DELICATO FAMILY VINEYARDS SAN JOAQUIN COUNTY 40. The Discharger will not irrigate the LAAs when LAA soils are saturated. Precipitation that falls on the LAAs during the rainy season will be allowed to percolate, and will not be discharged off-site. 41. A water balance was included in the 2012 RWD to demonstrate the capacity of the wastewater treatment, storage, and land application system. The water balance modeled storage and disposal capacity during the 100-year, 365-day precipitation event with at least two feet of freeboard in the two 0.25 MG aeration ponds. The water balance presented in the RWD used reasonable estimates of normal influent flows, precipitation, evaporation, and evapotranspiration, including allowances for seasonal variations. 42. The water balance was based on the current annual wastewater discharge of 56 MGY, with a peak monthly flow of 7.8 MG, and a separate water balance was used to model the proposed increased wastewater flow of 72 MGY and peak monthly average of 10 MG. The water balance used the 100-year annual rainfall event for the existing 23 acres of LAAs and the proposed 130 acre LAAs. The water balance shows that 130 acres of LAAs and a storage volume of 0.45 MG would provide adequate storage and disposal capacity for a total annual wastewater flow of 72 MG per year. 43. Based on current wastewater quality, projected future flow rates, and modification of LAAs, the anticipated hydraulic and waste constituent loading rates are tabulated below. Winery Expansion Phase Description Units Current Operations Initial Expansion Full Build-out (Phase 1) (Phase II) Annual Wastewater Flow MGY 48.1 ' 56 72 Land Use -- Uncropped Cropped Vineyards Cropped Vineyards Land Application Area Acres 23 2 23 107 23 107 Wastewater Inches 70.9 14 14 27 15 Irrigation Water 3 Inches 0 15 20.5 6 22 Max. BOD Loading lbs/ac/day 285 106 76 183 105 Total Nitrogen lbs/ac/yr 556 82 81 151 90 FDS Loading lbs/ac/yr 11,558 2,493 2,488 4,498 2,754 Blended FDS e mg/L 709' 258 230 429 240 Average for 2002-2011. 2 2012 RWD calculations for existing conditions were based on 20 acres of LAAs. 3 Combined flow from on-site agricultural supply well and from South San Joaquin Irrigation District. 4 FDS loading based on average wastewater FDS concentration blended with supplemental irrigation water at 50 mg/L TDS(assumes that TDS=FDS for supplemental water supply).