In Elevator I, there is an increase in the amount of calcium and chlorine. This increase repeated and
after the addition of fresh oil on March 2013. There is an increase in the concentration of calcium. This
element can be provided into the oil from the existence of atmospheric dust or airborne dirt, hard water
or salt water. Indeed, the results of the visual examination showed that the elevator well-hole was very
dirty. Furthermore, the existence of chlorine is very critical since it attacks the metals leading to
corrosion. The chlorine is mainly from the solvents which were used for normal cleaning or flushing
operations. The source of chlorine could also be the chlorinated alkanes which were used as anti-wear
and anti-stick additives.
The same observations were occurred and for the Elevator II