Section 170.500  General Release Detection Requirements for All UST Systems

a)         Owners or operators of new and existing UST systems shall provide a method, or combination of methods, of release detection that:

1)         Can detect a release from the entire tank and any portion of the connected underground piping that routinely contains product;

2)         Is installed, calibrated, operated and maintained in accordance with the manufacturer's instructions, including routine maintenance and service checks for operability or running condition; and

3)         Meets the performance requirements in Sections 170.530 and 170.540, with any performance claims and their manner of determination described in writing by the equipment manufacturer or installer.  In addition, methods used on or after December 22, 1990 (except for methods permanently installed prior to that date) shall be capable of detecting the leak rate or quantity specified for that method in Section 170.530 and 170.540 with a probability of detection of 0.95 and a probability of false alarm of 0.05.

4)         All leak detection equipment must be evaluated and be listed in the NWGLDE publication "List of Leak Detection Evaluations for Underground Storage Tank Systems", as referenced in Section 170.410.

b)         When a release detection method operated in accordance with the performance standards in Sections 170.530 and 170.540 indicates a release may have occurred, owners or operators shall notify the Illinois Emergency Management Agency in accordance with Sections 170.560, 170.590 and 170.580.

(Source:  Amended at 27 Ill. Reg. 8164, effective May 1, 2003)