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Sierra Chemical Co. . . SOP 917 RO <br /> 1.4 Sodium Hydroxide Waste Management Program <br /> 50 % sodium hydroxide is received at the facility in 90-ton railcars. It is used for the <br /> manufacture of sodium hypochlorite (discussed in section 1.1) as well as being packaged <br /> at various strengths for delivery to customers. <br /> The sodium hydroxide is off loaded from the railcar to storage tanks in the tank farm <br /> area. It can also be transferred directly to the Powell plant for the production of sodium <br /> hypochlorite, or diluted to the required strength for packaging. The product is offloaded <br /> from the railcar using the air padding method discussed in chlorine transfer(section 1.2). <br /> The 50% sodium hydroxide is diluted to 30%, 25%, and 20%by utilizing the Powell <br /> Continuous Bleach Plant. The blending system controls the addition of water to achieve <br /> the desired strength. The diluted product is pumped to tanks housed in a secondary <br /> containment area where it is stored prior to packaging. <br /> From the storage tanks the sodium hydroxide is pumped to the packaging area. Filling of <br /> non-bulk (5 to 53) gallon drums and bulk containers (350 gallon totes as well as <br /> seventeen ton tank trucks)takes place within the containment area located adjacent to and <br /> south of the tank farm. The containers are filled, rinsed, sealed, labeled and palletized in <br /> this area. Rinse water and in the event of an over fill, spilled product reports to a sump <br /> where it is transferred to the effluent storage tank for recycling. <br /> 10 <br />