The Anne Arundel County Fire Department Hazardous Materials Team responded to the scene and in working with the staff at Camp Letts isolated the problem to an apparent mechanical malfunction which caused an excessive amount of either Sodium Hypochlorite or Muriatic Acid to enter into the pool. The problem was recognized by camp staff who quickly evacuated children from the pool and moved them rapidly to showers at the facility where they were decontaminated of the product. The quick thinking of the staff is believed to have minimized the impact of the exposure.