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_ FALL C&K ENGINEERING, INC. • d� 9i v? <br /> Civil. Environmental Water Resource Engineering and Sciences In(��f 11/Il�n <br /> Tel.(831)426-9054 P.O.Box 7894,Santa Cruz,CA 95061 Fax.j831T4 - 2 <br /> JUL 1 0 2003 <br /> JqMR49RNT HEAL]H <br /> PERMIT/SERVICES <br /> Tim O'Brien <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road Suite A <br /> Sacramento, CA 95827-3003 <br /> Subject: Procedures to Reduce Total Dissolved Salts in Effluent <br /> Alpine Meat Packing Company, Stockton, San Joaquin County <br /> (WDR Order No. 115-2002-0225) <br /> Dear Mr. O'Brien: <br /> On behalf of the Alpine Meat Packing Company, Fall Creek Engineering, Inc. (FCE) has <br /> prepared this letter to discuss procedures that will be taken to reduce the concentration of <br /> total dissolved solids. The procedures, once approved by your office will be <br /> implemented in order to operate the facility in compliance with Effluent Limitation C.I <br /> of the WDRs that limit the TDS concentration to a maximum of 1,300 mg/L. <br /> FCE has evaluated the sources of TDS in the effluent at the Alpine Meat plant. Based on <br /> our analysis there appears to be four principal sources of TDS entering the wastewater, <br /> including: <br /> • Source water from deep wells, <br /> • Washwater from the processing facilities; <br /> • Brine solution from the water softener system; and <br /> • Anti-scaling agents added to the boiler feed water to protect the boiler. <br /> Presently, the softeners are the major source of TDS in the effluent. This system <br /> requires approximately 150 pounds of sodium chloride a day to regenerate the ion- <br /> exchange bed used to process boiler feed water. The ion exchange system accounts for <br /> over forty percent of the total TDS concentration measured in the wastewater. The <br /> wastewater includes detergents and spilled salt solutions and represents approximately <br /> thirty percent of the TDS load. The use of anti-scaling agents in the boiler feed water <br /> also attributed to the effluent TDS. Table I presents a summary of the average TDS <br /> contribution estimated for each source. <br /> To comply with the effluent limitation, FCE recommends that Alpine Meat replace the <br /> ion-exchange softener system with a reverse osmosis (RO) system. Replacing the ion- <br /> exchange softener system will allow the boiler to be operated without the use of anti- <br /> scaling chemicals and reduce the TDS load and concentration in the effluent- <br />