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WASTE DISCHARGE REQUIREMENTS ORDER R5-2013-0028 -12- DELICATO VINEYARDS, INC. DELICATO FAMILY VINEYARDS SAN JOAQUIN COUNTY 5 Blended FDS concentrations calculated using average wastewater FDS concentration with supplemental irrigation water at 50 mg/L TDS and 13.8 inches of annual precipitation on outdoor process areas that drain to the wastewater sumps. 44. When necessary, sludge will be removed from the lined aeration ponds in a manner that does not compromise the integrity of the liner. Recovered sludge will be incorporated into the on-site compost operation or disposed of at a permitted disposal facility. 45. Pomace removed from the presses is either sold for off-site composting or composted on-site. Approximately 15,000 tons of pomace is currently produced annually from crushing operations. Approximately 3,000 tons are composted onsite and the remaining 12,000 tons are provided to an offsite composting facility. The amount of composted material reused on-site is determined by a San Joaquin Valley Air Pollution Control District Permit to Operate for the composting operation, and based on market conditions. 46. Spent diatomaceous earth is removed by a contractor daily during the crush period and approximately weekly during the non-crush period. Diatomaceous earth that is not hauled offsite is incorporated into the onsite compost operation. 47. On-site composting of pomace and DE is currently conducted within an approximately 3-acre area south of monitoring well MW-2r, as shown on Attachment B. The current composting area will be reconfigured into a 2.5 acre area when the two aeration ponds are built. The relocated compost area will be located adjacent to the two proposed aeration ponds. The subgrade compost containment area will be compacted and will include a drainage system to transfer compost leachate and storm water runoff from this area back into the aeration ponds. 48. Compost is typically stored from the end of harvest into the following spring, depending on the weather. Finished compost is spread evenly over approximately 140 acres of vineyards, including the 100 acres of LAA vineyards, and 40 acres of non-LAA vineyards. Site-Specific Conditions 49. Surrounding land uses are primarily agricultural with seasonal crops and vineyards, along with a few scattered rural residences. A golf course and a cemetery are located north of the facility across French Camp Road. 50. Topography of the site and surrounding area is generally level with an approximate elevation of 30 to 35 feet above mean sea level (MSL). Regional surface drainage is to the northwest towards Lone Tree Creek, which drains to French Camp Slough and eventually to the San Joaquin River. The facility is located within the San Joaquin Valley Floor Hydrologic Unit (535.10).