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WASTE DISCHARGE REQUIRE-._ENTS ORDER NO. 5-01-055 -10- TRI VALLEY GROWERS PLANT NO.4 STOCKTON, SAN JOAQUIN COUNTY 8. The land application area shall be irrigated with process wastewater via a closed system designed and operated to contain all tailwater and storm water runoff within the boundaries of the designated disposal fields. 9. There shall be no standing water in the disposal area 48 hours after wastewater is applied, except during periods of heavy rains sustained over two or more consecutive days. 10. Application of process wastewater shall only occur where furrows are graded to provide uniform water distribution, minimize ponding, and provide complete tailwater control. Furrow runs shall be no longer, and slopes shall be no greater, than that which permits uniform infiltration and maximum practical irrigation efficiency. The minimum furrow slope shall not be less than 0.2%. 11. The wastewater discharge shall not occur within a 100-foot wide buffer zone along any property lines adjacent to properties developed with residences or business. Irrigation or impoundment of wastewater shall not occur within 50 feet of any domestic well. 12. Wastewater shall be managed so as to prevent ponding and conditions conductive to the proliferation of mosquitoes and other disease vectors, and to avoid creation of a public nuisance or health hazard. More specifically: a. Tailwater must be returned to the pond and all irrigation water must infiltrate or evaporate completely within 48 hours. b. Ditches and low spots must be maintained free of emergent, marginal, or floating vegetation. c. Low pressure and unpressurized pipelines and ditches accessible to mosquitoes shall not be used to store reclaimed waters. E. Solids Disposal Requirements: 1. Collected screenings, sludge, and other solids removed from liquid wastes shall be disposed of in a manner approved by the Executive Officer, and consistent with Consolidated Regulations for Treatment, Storage, Processing, or Disposal of Solid Waste, as set forth in Title 27, CCR, Division 2, Subdivision 1, Section 20005, et seq. 2. Any proposed change in solids use or disposal practice from a previously approved practice shall be reported to the Executive Officer at least 90 days in advance of the change. F. Groundwater Limitations: The discharge, in combination with other sources, shall not cause underlying groundwater to contain waste constituents in concentrations statistically greater than background water quality, except for coliform bacteria. For coliform bacteria, the discharge shall not cause the most probable number of total coliform organisms to exceed 2.2 MPN/100 ml over any 7-day period.