The Cumberland County Board of Education unanimously approved a sewage-disposal study last night for Crab Orchard School at a cost of $7,100. Sewage has been an issue at the school for some time. The two possibilities to remedy the problem are to look for land on site on which to install a septic system or pump the sewage to Crossville. The latter would require easements for pipe routes toward the city. Details of the study are expected soon.