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(1) To properly operate and maintain UST systems, no later than October 13, 2021, owners and operators must meet one of the following:

(a) conduct a walkthrough inspection that, at a minimum, checks the following equipment as specified below:

(i) every 30 days, except spill prevention equipment at UST systems receiving deliveries at intervals greater than every 30 days may be checked prior to each delivery:

(A) visually check spill prevention equipment for damage;

(B) remove liquid or debris;

(C) check for and remove obstructions in the fill pipe;

(D) check the fill cap to make sure it is securely on the fill pipe;

(E) for double walled spill prevention equipment with interstitial monitoring, check for a leak in the interstitial area;

(F) check release detection equipment to make sure the release detection equipment is operating with no alarms or other unusual operating conditions present; and

(G) ensure records of release detection testing are reviewed and current; and

(ii) on an annual basis, the following must be checked:

(A) visually check containment sumps for damage, leaks to the containment area, or releases to the environment; remove liquid (in contained sumps) or debris; and, for double walled sumps with interstitial monitoring, check for a leak in the interstitial area;

(B) check hand held release detection equipment such as tank gauge sticks or groundwater bailers for operability and serviceability; and

(C) conduct operation and maintenance walkthrough inspections according to a standard code of practice developed by a nationally recognized association or independent testing laboratory that checks equipment comparable to (1)(a); or

(b) use the following code of practice to comply with (1): Petroleum Equipment Institute Recommended Practice RP 900, "Recommended Practices for the Inspection and Maintenance of UST Systems."

(2) Conduct operation and maintenance walkthrough inspections developed by the department that checks equipment comparable to (1).

(3) Owners and operators must maintain records in accordance with ARM 17.56.305 of operation and maintenance walkthrough inspections for one year.

(a) Records must include:

(i) a list of each area checked;

(ii) whether each area checked was acceptable or needed action taken;

(iii) a description of actions taken to correct an issue; and

(iv) delivery records if spill prevention equipment is checked less frequently than every 30 days due to infrequent deliveries.


History: 75-11-505, 75-11-509, MCA; IMP, 75-11-505, MCA; NEW, 2018 MAR p. 1954, Eff. 10/6/18.

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