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WASTE DISCHARGE REQUIREMENTS ORDER NO. -4- MORADA PRODUCE COMPANY LINDEN PACKING SHED SAN JOAQUIN COUNTY wastewater. The Discharger may add cover crops in the rows between the trees. Other crops may be acceptable as long as the discharge complies with the Effluent Limitations. 22. Wastewater applications will be rotated to provide soil drying time and to prevent odors. If odors are detected, the irrigated areas will be allowed to dry out thoroughly. Discing activities can be performed between crop activities. OTHER WASTE STREAMS 23. Solids are generated in processing each of the crops. Each solid waste is disposed of differently as described below: a. Onions are harvested, bagged, and shipped dry. There is not washing or other wastewater generated associated with onions. Solids are swept up and disced into the soil in the walnut orchard. b. Asparagus are unloaded onto a conveyor-packing belt. The butt ends are manually trimmed and the spears are washed. The butt ends are placed into a trough with flowing water and float to a loading pit where a conveyor belt loads them onto trucks. The butt ends are used as cattle feed. C. Cherries generate little solids. The crop is hand picked. Any solids that are generated are disposed of by applying to the walnut orchard or are landfilled. 24. Domestic wastewater is discharge to a septic system that is permitted by the San Joaquin County Environmental Health Department. San Joaquin County Environmental Health Department will continue to provide oversight for the septic system. Domestic wastewater is not commingled with the process water. GROUNDWATER CONDITIONS 25. According to information published by the San Joaquin County Flood Control and Water Conservation District, the depth to groundwater is approximately 95 feet below ground surface and flows to the south-southeast, although locally, groundwater depth and flow may be influenced by local pumping and irrigation patterns. 26. A groundwater sample was collected from the on-site well that serves the facility. Nitrate as nitrogen was reported in the sample at a concentration of 4.0 mg/L. 27. Although not fully characterized yet, it is presumed that the wastewater will contain chloroform at concentrations exceeding groundwater water quality objectives. The Chemical Constituents objective in the Basin Plan applies to all groundwaters, and prohibits concentrations of chemicals that could impair beneficial uses. For chloroform, the most limiting value for the protection of the drinking water beneficial use is the Cal/EPA one-in-a-million incremental cancer risk of 1.1 µg/L. Chloroform is projected to be present in the wastewater at concentrations ranging 16 µg/L to 25 gg/L, well in excess of the limiting value.