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WASTE DISCHARGE REQUIREMENTS ORDER NO. 99-134 -2- RICHARD A. STAGNO STAGNO'S MEAT COMPANY SAN JOAQUIN COUNTY 7. The Discharger proposes to discharge approximately 14,500 gallons per day of slaughterhouse wastewater, plus an average of 50 gallons per day of rinse water from the periodic washdown of the holding pens, to the treatment pond. A design flow of 30,000 gallons per day was used for sizing of the wastewater treatment pond. 8. Wastewater from the slaughterhouse operations will be derived from one animal rinse,two carcass rinsings, and kill-floor rinsewater. A 2000 gallon septic tank and a screened, 2000-gallon grease trap will be used to treat wastes from the slaughterhouse operations prior to discharge to the treatment pond. Screenings and fats, oils, and greases (FOG) accumulated in the screened grease trap will be collected by the tallow operation. 9. The water quality of the slaughterhouse effluent was estimated based on a sample collected at another slaughterhouse that has no blood recovery and only gross solids removal, as reported below. Therefore, the effluent quality estimate should be conservative for the Discharger's facility. Concentration Compound In Milligrams per liter(mg/1) Biochemical Oxygen Demand (BOD) 550' - 1100 Suspended Solids 150 Total Kjeldahl Nitrogen 160 pH 8.0 (pH Units) 1 The BOD is estimated to be reduced by 50 percent by capturing 99 percent of all blood,screening of solids,and-a grease trap. — 10. The Discharger uses cleaning solutions consisting of a detergent concentrate/disinfectant. Approximately 16 gallons of the concentrated material will be used weekly, and will be diluted prior to usage. The cleaning solutions will be further diluted (6250 to 1), as they will be discharged with the process wastewater. 11. The treatment pond is partially constructed and is adjacent to two residences. The pond is approximately 165 by 165 by 8 feet deep, with the base of the pond about 4 feet below grade. The pond berms were constructed with native soil and are proposed for lining with 30-mil high density polyethylene plastic (HDPE) in the RWD. Fencing and warning signs will be placed around the pond. The influent lines are proposed for installation at the northern end of the pond while the effluent line will be placed at the southern end. 12. The Discharger proposes to triple crop sudangrass in the designated disposal area. Wastewater from the storage pond will be periodically applied to provide the Nitrogen requirement for the