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San Joaquin County Environmental Health J. Yoshioka <br /> OPERATION OF ION EXCHANGE UNITS <br /> The ion exchange units are used to remove Potassium Acid Tartrate <br /> solids from the wine. Once the ion exchange column has exhausted <br /> the exchange capacity, the columns are recharged by flushing with <br /> either dilute sulfuric acid or dilute sodium hydroxide . This <br /> recharge operation generates solutions of hazardous waste based on <br /> the corrosive characteristics of the waste . <br /> THE WINE GROUP, FRANZIA WINERY <br /> The Wine Group Hazardous Waste Treatment Notification Form <br /> indicates two ion exchange units, a cation and an anion, which <br /> generate 140, 000 gallons of equal to or less than pH 2 and 31, 900 <br /> gallons of equal to or greater than pH 12 . There were no <br /> analytical reports submitted or on file to substantiate these <br /> quantities. <br /> Each unit drains to a common CVPC pipe which drains to a 12 inch <br /> floor sump, see diagram, in which process water is piped to a <br /> holding area and then eventually used for irrigation of the <br /> surrounding vineyards . The treatment process takes place in the <br /> neutralization (dilution?) of the ion exchange effluent with the <br /> process waters of the plant . <br /> CANANDAIGUA WINE COMPANY, ESCALON <br /> In the Canandaigua Wine Company, Escalon Cellars, a reported <br /> 800, 000 gallons of corrosive hazrdous waste is generated from ion <br /> exchange units . The effluent is pumped into a holding tank and is <br /> neutralized with anhydrous ammonia. This solution is then pumped <br /> into evaporation ponds located on the winery grounds . <br />