220.127.116.11 Interstitial Monitoring
If monitoring is conducted using an ATG or other automatic sensing device then monitoring results for the previous twelve (12) months must be maintained at the facility.
If an ATG has a printer then it is important to printout a copy of the alarm history report for each month of operation.
Copies of the report should be maintained and be readily available for inspection for the previous twelve (12) months. during the year.
If monitoring requires a visual inspection of the interstitial space then a log documenting the inspection must be maintained for each of the previous twelve (12) months.