If you have a production facility with 2 separate rooms to house your laying hens, the SC-SC program requires that you record ammonia in both rooms from October to March. Please note that for those farms that have not been recording ammonia in both rooms, these records must be maintained in both rooms for 2 years, showing no issues of ammonia levels going over 25ppm, before you can be exempt from measuring under the Ammonia Exception Rule. This history is required in your records for verification purposes – so that you can prove that you have taken the necessary steps to provide a healthy environment for your birds.