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Siena Chemical Co. 0 SOP 917 RO Waste Management Program Section 1: Process Descriptions 1.1 Hypochlorite Solution: Hypochlorite solution is manufactured and packaged at the Sierra Chemical Co. Stockton facility. This process is accomplished utilizing a Powell Continuous Bleach Plant. The plant is located in a contained room with a ventilation collection system. The air is treated in a bi-gas scrubber prior to being discharged to the atmosphere. The continuous plant operates automatically. It dilutes 50% caustic with water and controls the reaction as liquid chlorine is added to form sodium hypochlorite. This is accomplished utilizing two control systems. The blending system controls the strength of the caustic. The reaction system controls the degree of chlorination. The finished product is piped to tanks housed in a secondary containment area where it is stored prior to packaging. From the storage tanks the hypochlorite solution is pumped to the packaging process. The most common packaging is that of Ming one-gallon bottles but may include filling non-bulk 5 to 53 gallon drums. The one-gallon containers are filled in a rotary filling station located inside the warehouse. Empty containers enter a bottle and case washing station, where they are washed, drained and placed on a conveyer. The conveyer feeds the rotary filler. As the rotary filler turns, a filling nozzle enters the mouth of the bottle and forms an airtight seal between the filling nozzle gasket and the neck of the bottle. Hypochlorite solution then flows into the bottle until the bottle is full. Once the bottle is full, product will continue to flow through the sealed bottle into an overflow tank until the bottle exits the filling machine onto the conveyor. Product from the overflow tank is recycled into the head tank for later filling. Upon exiting the filling booth, the bottle of hypochlorite continues down a diked conveyer system, through a capper, and through a water rinse area, where any excess product spilled on the bottle exterior is removed. Once cleaned the bottle is picked up by another conveyer, which carries it out of the containment system to a point where bottles are cased, and palletized. The rotary filling station is located in a secondary containment designed to capture any spills that may occur during the filling process. The combination of recovered product and rinse water that accumulates in this secondary containment is referred to as"effluent". The effluent is pumped to an effluent storage tank located in the hypochlorite containment area in the tank farm south of the warehouse where it is recycled into the hypochlorite manufacturing process. Filling of the non-bulk 5 to 53 gallon drums gallons takes place within the warehouse in secondary containment. The containers are filled, rinsed, sealed, labeled and palletized in this area. Rinse water and in the event of an overfill, spilled product report to a sump where it is transferred to the effluent storage tank for recycling. 5