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WASTE DISCHARGE REQUIREMENTS ORDER R5-2012-0103 - 25 - CONSTELLATION BRANDS U.S. OPERATIONS, INC. dba WOODBRIDGE WINERY WOODBRIDGE WINERY SAN JOAQUIN COUNTY 5. Objectionable odors shall not be perceivable beyond the limits of the facility boundary at an intensity that creates or threatens to create nuisance conditions. 6. As a means of discerning compliance with Discharge Specification B.6, the dissolved oxygen (DO) content in the upper one foot of any wastewater pond shall not be less than 1.0 mg/L for three consecutive weekly sampling events. If the DO in any single pond is below 1.0 mg/L for three consecutive sampling events, the Discharger shall report the findings to the Regional Water Board in writing within 10 days and shall include a specific plan to resolve the low DO results within 30 days. 7. The Discharger shall operate all systems and equipment to maximize treatment of wastewater and optimize the quality of the discharge. 8. All ponds shall be managed to prevent the breeding of mosquitoes. In particular: a. An erosion control program should assure that small coves and irregularities are not created around the perimeter of the water surface. b. Weeds shall be minimized through control of water depth, harvesting, and/or use of herbicides. c. Dead algae, vegetation, and debris shall not accumulate on the water surface. 9. The LAAs shall be managed to prevent the breeding of mosquitoes and flies. 10. The Upper Ponds shall be designed, constructed, operated, and maintained to prevent inundation or washout due to floods with a 100-year return frequency. The Lower Ponds shall be managed in accordance with the NPDES Low Threat General Waste Discharge Requirements, Order R5-2008-0081, and subsequent updates, for as long as they are vulnerable to inundation by the Mokelumne River in a 100-year flood event. 11. The freeboard in each pond shall never be less than two feet, as measured vertically from the water surface to the lowest point of overflow, except for internal berms that are not required to contain the waste. 12. The wastewater treatment, wastewater storage, and land application systems shall have sufficient capacity to accommodate wastewater flow and seasonal precipitation. Design seasonal precipitation shall be based on total annual precipitation using a return period of 100 years, distributed monthly in accordance with historical rainfall patterns. 13. On or about 15 October each year, available pond storage capacity shall at least equal the volume necessary to comply with Discharge Specifications B.11 and B.12. 14. Beginning in 2017, the Discharger shall test the integrity of all pond liners every five years and repair all significant leaks in accordance with an approved workplan pursuant to Provision G.1.j.