The BYD Co. Ltd. electric-bus manufacturing plant in Lancaster is the subject of a continuing investigation into workplace violations by the California Department of Industrial Relations. The department has already levied $99,245 in fines against the Chinese company for violations at the plant and its North American headquarters in Los Angeles. It has been hit for not paying its employees the state’s minimum wage, not providing worker’s compensation insurance, failure to provide itemized wage statements, and not giving a second brief rest break. The department cited 122 violations at the Lancaster facility between late August and Oct. 10, according to the Division of Labor Standards Enforcement. BYD owns one building in Lancaster for assembly of electric buses, and leases a second for battery-pack assembly. Operations at the bus plant began in May to produce buses for Long Beach Transit and the Los Angeles County Metropolitan Transportation Authority. The investigation into BYD remains active, a department spokesperson said. Attempts to reach Micheal Austin, vice president of BYD America, were not successful. BYD plans to appeal the citations and fines, according to media reports. Warren Buffett’s Berkshire Hathaway has about a 10 percent stake in the manufacturer of vehicles and batteries.