sentences:  The Hoffman family, dairy farmers near New London, had sued WEPCO after several years of declining production.WEPCO had measured on the farm currents due to stray voltage below one milliampere, the "level of concern" set by the Wisconsin Public Service Commission, but the court ruled on procedural grounds that the utility could be found negligent under common law even though they met the state standard.The Hoffmans had presented, the court said, a viable alternative theory that stray voltage had caused them economic harm.