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WASTE DISCHARGE REQUIREMENTS ORDER R5-2012-0105 5 <br /> DIAMOND PET FOOD PROCESSORS OF RIPON, LLC AND <br /> RIPON COGENERATION, LLC <br /> DIAMOND PET FOOD RIPON FACILITY <br /> SAN JOAQUIN COUNTY <br /> The overall influent flow rate will average approximately 700,000 gallons per day(gpd), <br /> which includes wastewater generated from Diamond and Ripon Cogeneration, LLC, and <br /> dilution water. The wastewater generated by Diamond and Ripon Cogeneration, LLC will <br /> average approximately 283,000 gpd, which is approximately 40 percent of the total flow. <br /> 21. Diamond predicted the character of the untreated pet food processing wastewater based <br /> on influent data for another Diamond plant at Lathrop. The following table summarizes <br /> projected overall wastewater quality based on Diamond's estimates and historical <br /> wastewater quality for Ripon Cogeneration, LLC and the dilution water. LAA loading rates <br /> based on the projected overall influent quality are also presented. <br /> Predicted Influent quality and loading rates <br /> Ripon Flow Annual <br /> Ripon Groundwater Cogeneration Weighted Con Loading <br /> Parameter Units Cogeneration Diamond for Dilution '- Distilled Water centration Iblacl r <br /> BOD mglL X0.5 207 0 - 3 66 <br /> Nitrate as N mglL 28 <0.5 4.8 11 178 <br /> Total nitrogen mglL 29 50 4.8 2 16 256 <br /> Chloride mglL 86 69 41 54 864 <br /> TDS mglL _ 1,154 1,100 430 684 20,008 <br /> B on 2011 groundwater monitoring data for process supply well PW-6. <br /> 2 Assuming total nitrogen concentration equals nitrate nitrogen concentration. <br /> 22. To compare the predicted discharge with the previous paper mill's discharge, the TDS <br /> loading rates for the LAAs were calculated as summarized below. <br /> Annual TDS <br /> Average Flow Average Loading Rate <br /> Source of Wastewater (gpd) TDS(mglL) (Iblacrelyear) <br /> Paper Mill Wastewater and <br /> Past(Neenah) Ripon Cogeneration, LLC Brine <br /> in 2008 1,136,828 812 32,608 <br /> Present(Ripon Ripon Cogeneration, LLC Brine <br /> Cogeneration, with Groundwater Dilution <br /> LLC Only) During 5110-6111 (after paper <br /> mill closed) 322,587 526 5,992 <br /> Proposed Diamond and Ripon <br /> Near Future Cogeneration, LLC with <br /> Groundwater and Distilled <br /> Water Dilution 701,100 684 2 20,008 <br /> Based on the monitoring data in ABS#2. <br /> 2. Based on the projected influent TDS. <br /> The projected overall influent TDS concentration of 684 mg/L for Diamond and Ripon <br /> Cogeneration, LLC is less than the 2008 average TDS concentration of 812 mg/L. <br /> In addition, the proposed TDS loading rate is approximately 61 percent of the paper <br /> mill/cogeneration plant discharge. To address the sources of salinity discharged to the <br /> wastewater treatment system and the LAAs, this Order requires the Dischargers to submit <br /> a Salinity and Nutrient Evaluation and Minimization Plan. <br />