SECTION 165:25-3-6.26. Automatic tank gauging systems

(a)   Automatic tank gauging systems (ATG's) that test for the loss of product must conduct an automatic product level monitor test at a minimum frequency of once every 30 days, and be capable of detecting at least a 0.2 gallon per hour (gph) leak rate for any portion of the tank that routinely contains product.

(b)   The test must be performed with the system operating in one of the following modes:

(1)   Passing 0.1 gph test at least every thirty (30) days; or

(2)   Passing 0.2 gph test at least every thirty (30) days along with inventory reconciled at thirty (30) days; or

(3)   Passing continuous statistical leak detection ("CSLD") test at least every thirty (30) days along with inventory reconciled at thirty (30) days.

(c)   ATGs must be third party certified for the size of tanks and for the quantity of tanks that are manifolded together. Only third party certifications that have been reviewed and approved by the National Work Group on Leak Detection Evaluations (NWGLDE), found at NWGLDE Web Site, will be accepted (www.nwglde.org).

[Source: Amended and renumbered from 165:25-3-5.6 at 23 Ok Reg 2261, eff 7-1-06; Amended at 25 Ok Reg 1867, eff 7-1-08; Amended at 34 Ok Reg 935, eff 9-11-17; Amended at 36 Ok Reg 551, eff 8-1-19]