The changes at Calumet Lubricants' solvent refinery outside Cotton Valley, La., are immediately obvious to anyone who has visited during the past four years. Driving through the rolling oak and pine woods along Old Highway 7, one still finds a chain link fence at the property's edge. As in the past, the gate is always open. A hundred yards down the entrance road, however, stands a new fence, eight feet of chain link topped with barbed wire. This fence has surveillance cameras and an electronic gate operated by magnetic card keys. Employees slide their identification cards to gain entry. Truck drivers use a keypad to type a code assigned specifically for their delivery or pickup. Visitors use a phone to call the plant's main office.
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