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Sierra Chemical Co. . . SOP 917 RO Waste Management Program 1.2 Chlorine Transfer Chlorine is received at the facility via ninety(90)ton railcars. The chlorine transfer process begins at the railcar. Initially the chlorine railcar is padded with dry air to drive the material into the piping manifold. The chlorine is then repackaged into seventeen (17)ton tank trucks, one-ton containers, and one hundred and fifty (150) pound cylinders. An overview of each process is discussed below. Tank Trucks The procedure for filling a seventeen(17) ton tank truck starts with connecting to the railcar. This is accomplished as follows. Inspect the railcar by checking to insure the handbrake has been set, caution sign and derails placed, and the wheels chocked. Verify through inspection of the bill of lading, reporting marks, car number, commodity marking, and an intact seal that the railcar is loaded with chlorine. Open the protective housing and inspect the man way fittings for leaks. Insure the one-inch pipe plug closure is chained to the angle valve body and all piping is clean, dry, and free of oil prior to making any connections. Tightly screw the one-inch schedule 80 steel nipple into the valve outlet. Connect the flex lines to the nipple and the distribution piping. Release a small amount of chlorine into the system and check for leaks utilizing ammonia solution prior to filling the system. Following the leak check, dry compressed air is introduced to the railcar to force the liquid chlorine into the truck. Upon filling the tank truck to the desired weight the liquid valve at the railcar is closed and the discharge line is emptied. The air supply line will then be shut off and disconnected. One Ton Cylinders One-ton tanks are filled from the railcar. The tanks are inspected for damage. Each tank has a liquid and gas valve. Flex lines are connected from the tank to the fill manifold from the railcar. The valves and lines are checked for leaks. The tank to be filled is weighed and compared to the stamped tare weight. If the weights do not match, the tank is vacuumed to verify the tare weight. Liquid chlorine is forced into the one-ton tank by air padding until it contains 2000 pounds. The fill valves are then closed, the lines emptied and disconnected. 150 Pound Cylinders 150-pound cylinders are filled using the same process as described for the one-ton tanks. Repackaging of chlorine takes place in a gas room that is sealed in the event of a leak. The ventilation system passes through a scrubber to treat and remove any chlorine. Filled containers are also stored in this area. 7