By Jim Misunasjmisunas@gbtribune.comROZEL — The Occuptaional Ssafety and Health Administration cited Golden Valley Inc. for seven serious safety violations in 2011, including protective guardrails that were not installed; floor holes that were not covered; the lack of a guard system over a pulley system, breakers not properly labeled and PVC pipe not properly protected. CITATION 1, ITEM 1 SERIOUS VIOLATIONAt the establishment, in the tire shop, one-inch diameter PVC Schedule 40 pipe was being used to transport compressed air up to 130 psi and was not encased in conduit or shatter resistant materials. Employees were exposed to struck-by hazards from potential rupturing plastic PVC pipe being used to transport compressed air throughout the shop facility in 1-inch diameter size.Employer Knowledge — PVC pipe has been installed in the facility for more than six months, since the addition was constructed in 2002.