Choose a company which uses only a permanently employed, highly trained team who have also been police checked to work in secure environments. Ensure any materials its employees use are specifically designed for the purpose and are chemically inert. Strong chemicals and water have the potential to cause corrosive dust, which could contain ionic chemical compounds like sulphur and chlorine salts, which, when wet, become corrosive or can create short circuits within equipment.
Having strict rules on what can and cannot enter the facility will help to limit the level of contamination between professional visits. Banning all food and drink stuffs, as well as removing all packaging outside the facility, may seem like simple and obvious tips but rarely are they enforced as strictly as they should be. Limiting the number of personnel who have access is another important rule, if there is no need to be in there, don’t be. Removing all unnecessary equipment and work stations will also help stop people feeling it is acceptable to remain inside.
Simple ideas, like creating a check list to be performed on set days each week, can have a big affect on contamination levels. These should include: