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INFORMATION SHEET ORDER NO. R5-2003-0178 MORADA PRODUCE COMPANY LINDEN PACKING SHED SAN JOAQUIN COUNTY Morada Produce Company(MPC)packages freshly harvested onions and is expanding its operations to include packaging of fresh asparagus and cherries. Onions are packaged dry but wastewater will be generated while processing asparagus and cherries. Wastewater will be generated seven days a week from February to April (asparagus season) and May to June (cherry season). The facility is located east of Stockton at 500 N. Jacktone Road. The expansion of the existing facility will be constructed in two phases. Phase I will be a 27,800 sq. ft. addition to the existing onion packing operation. This addition will consist of a 20,000 sq. ft. asparagus packing operation and a 7,800 sq. ft. cold storage room. Phase II will'be the expansion of the 20,000 sq. ft. building for a cherry processing line, a new office, and an attached restroom facility. Industrial wastewater will consist of rinse water and hydrocooler water. Rinse water is discharged daily during the processing season; hydrocooler water is discharged twice a week as needed. Wastewater is stored in an unlined storage pond into which stormwater will also be discharged. Wastewater in the pond will be used for irrigation of approximately 160 acres of walnut orchards located adjacent to the packing facility MPC's treatment of process wastewater consists of screening prior to discharge into a 1.46 million gallon wastewater pond. Wastewater in the pond will be further treated through biological activity, settling, and volatilization of organic compounds. Wastewater generated by washing asparagus and cherries contains approximately 50 mg/L of chlorine. Trihalomethanes (THMs) are formed when chlorinated water is brought into contact with organic matter. At MPC, organic matter may be naturally present in the well water supply, may be introduced into the process water during the chilling operation, or may be present in the wastewater pond. The forecast wastewater generation rate is approximately 140,000 gallons per month. Because industrial wastewater is mixed with stormwater in the pond, all the water collected will be handled and disposed of as industrial wastewater. Wastewater is discharged to a 160-acre walnut orchard. Based on the RWD's water balance, the pond will go dry in September, even using the 100-year return annual rainfall amount. The pond will likely go dry earlier in the year during normal rainfall amount years. Because the wastewater does not provide enough water for irrigation of the orchard, supplemental irrigation water is mixed with the wastewater and applied to the crops. Mix ratios (the amount of supplemental water divided by the amount of process/stormwater)will vary from a minimum factor of 5 in December, to a maximum of 217 in July.