Cleanup of historic Southern Pacific railroad shops is expected to begin late this month as the next phase of the Sacramento Railyards project kicks into gear. Hazardous materials including lead paint, asbestos, metals and other industrial toxins need to be removed from the shops, which were built starting in 1868. Georgia developer Thomas Enterprises has put the abatement project out to bid and expects to award the contract in the next few weeks, said Richard Rich, development director for the Railyards project. In its heyday, Southern Pacific practically owned the town. The railyards drove Sacramento's economy, and nearly a third of all the city's residents worked there. The shops lay