Engineers found just one minor concern last week while inspecting Dragon Products Co.’s $40 million expansion project at its cement-making plant on US Route 1. The project is nearing completion and operations are shut down, so the time is right for an inspection, Code Enforcement Officer Peter Surek said Friday. The town hired two engineering firms to do the job. Dragon announced its expansion in January 2002. It involves switching to the dry method of manufacturing cement. When Dragon applied for permits for the expansion, it paid a $143,540 permit fee. Dragon appealed the fee amount to the zoning board, which upheld the charge. The company did not further appeal to Superior Court.