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WASTE DISCHARGE REQUIREMENTS ORDER NO. 2 RICHARD A. STAGNO STAGNO'S MEAT COMPANY SAN JOAQUIN COUNTY the holding pens, to the treatment pond. A design flow of 30,000 gallons per day was used for sizing of the wastewater holding pond. 7. 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. 8. 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(me/1) Biochemical Oxygen Demand (BOD) 5501 - 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. 9. 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. 10. The treatment pond will be approximately 165 by 165 by 8 feet deep, and the base of the pond will be 4 feet below grade. The pond berms will be constructed using native soil and will be lined with 30-mil high density polyethylene plastic (HDPE). 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. 11. 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 crop. A baseline soil sample of the cropland was analyzed in December 1997. The reported concentrations of Nitrogen (as Nitrate), Phosphorus, and Potassium are 8, 33, and 75 milligrams per kilogram, respectively. Soluble salts are reported to be 3.3 millimhos per centimeter. c:tckwf"i les\agriculturetagwdrs\stagno\stagnowdrs