STOCKTON, Utah (AP) -- Eight workers at the Tooele Chemical Agent Disposal Facility were being given medical evaluations for possible exposure to VX nerve agent, Deseret Chemical Depot officials said Tuesday.

The workers showed no signs or symptoms of exposure but the evaluations were being conducted as a precaution because of contamination readings on a set of Life Support System air hoses used during routine toxic operations on Monday and Tuesday.

The workers' protective gear includes charcoal filters for additional protection.

Officials still were awaiting results of lab tests in the medical evaluations.