An Environmental Contamination project is part of a full IRIS scan.

As a measure for the quality of the cleaning activities on the department, the amount of Adenosine triphosphate (ATP), is measured on several objects and surfaces.

Adenosine triphosphate (ATP) is an enzyme that is present in all organic matter - living and once-living - including blood, saliva and bacteria.

The surfaces or objects that are tested include medical instruments such as a thermometer, or a sphygmomanometer, but span over patiënt related equipment as well, such as a nightstand and closet, sanitary equipment such as a sink or toilet and non patient related objects such as a teampost computer or telephone as well.

The person monitoring the ATP, takes swabs of the surfaces that need to be tested and inserts these swabs into a handheld unit, an ATP detection kit, or luminometer. Within seconds, this unit provides a result in "relative light units" (RLU). Each result will be given a score.

Of every department, the total score will be calculated and the percentage of "clean", "intermediate", "contaminated" and "extreme contaminated" results will be displayed in the report.

A total score of 4 or lower is classified as "clean", a score between 5 and 12 will be classified as "intermediate" and a score above 12 will be classified as "contaminated".