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WASTE DISCHARGE REQUIREMENTS ORDER NO. -3- MORADA PRODUCE COMPANY LINDEN PACKING SHED SAN JOAQUIN COUNTY Asparagus Cheery Month Wastewater Wastewater Stormwater1'2 Total' January 0 0 600,629 600,629` February 128,400 0 566,669 695,069 March 142,157 0 401,885 544,042 April 137,571 0 198,454 336,026 May 0 142,157 155,201 297,358 June 0 137,571 29,134 166,706 July 0 0 5,002 5,002 August 0 0 7,342 7,342 September 0 0 32,163 32,163 October 0 0 137,475 137,475 November 0 0 292,994 292,994 December 0 0 323,144 323,144 1 All units are Gallons per Month. Stormwater calculated using 100-year return annual total distributed in accordance with historical pattern and the rational runoff method. 16. The Discharger's treatment of process wastewater consists of screening prior to discharge into the wastewater pond. Wastewater in the pond will be further treated through biological activity, settling, and volatilization of organic compounds. 17. The pond is approximately 150 feet by 145 feet, and is 15 feet deep. The storage capacity of the pond is approximately 1.46 million gallons. 18. The September 2002 RWD included an odor control contingency for the wastewater storage pond. If the pond generates odors, or if the dissolved oxygen level is less than 1.0 mg/L, then an aerator will be added to the pond. LAND APPLICATION SYSTEM 19. Wastewater is discharged from the pond to a 160-acre walnut orchard as shown on Attachment B, which is attached hereto and made part of the Order by reference. 20. 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 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 for the month of December, to a maximum of 217 in the month of July. 21. To control tailwater, the land application area is bermed. Wastewater application will be by flood irrigation. Sprinkler application of wastewater in the land application areas is acceptable if the application is in compliance with Section D, "Land Application Area Specifications" of this Order and if the land application area has been adequately prepared to receive sprinkler applied