Because petroleum product releases can pose a threat to the public health, safety and the environment, Fuel Specialists must ensure that the proper mechanisms are in place and standards, rules, and requirements are met to prevent releases.

1. (1) Spill and overfill protection. Fuel Specialists must ensure that appropriate spill and overfill protection devices are in place and operational.

2. (2) Leak detection on tanks. Fuel Specialists must check the condition of an owner or operator's selected method(s) of leak detection at a location. The requirements of each method listed below are offered as a general outline; a complete list of leak detection requirements is in OAC 165:25 and OAC 165:26.

   1. (A) Vapor monitoring wells. If vapor monitoring wells are an owner or operator's selected method of leak detection, the Fuel Specialist must ensure that the requirements listed below are met:

      1. (i) Wells must be correctly installed and sufficient in number for the particular facility.
      2. (ii) A monitoring well site assessment must be completed with documentation of Commission acceptance kept on site for review.
      3. (iii) Wells must be properly monitored and the results recorded every 30 days on the appropriate OCC form.
      4. (iv) Any single vapor monitoring well reading above 4,000 units/ppm for gasoline and 1,500 units/ppm for diesel shall be reported to a Commission Project Environmental Analyst by telephone at (405) 521-4683 (if after hours or on weekends or holidays, call the PSTD emergency number at (405) 823-0994) within 24 hours of the owner, operator, employees, agents, or Monitor Well Technicians knowing of the reading. If gasoline and diesel tanks are in the same tankpit, any reading above 1,500 units/ppm shall be reported. If high readings have not been reported, the Fuel Specialist shall immediately report it.

   2. (B) Groundwater monitoring wells. The Fuel Specialist must ensure, if groundwater monitoring wells are an owner or operator's method of leak detection, that the requirements listed below are met:

      1. (i) Wells must be correctly installed and sufficient in number for the particular facility.
      2. (ii) A monitoring well site assessment must be completed with documentation of Commission acceptance kept on site for review.
      3. (iii) Wells must be properly monitored and the results recorded every thirty (30) days on the appropriate OCC form.
      4. (iv) Any indication of product discovered shall be reported to a Commission Project Environmental Analyst by telephone at (405) 521-4683 (if after hours or on weekends or holidays, call the PSTD emergency number at (405) 823-0994) within 24 hours of the owner, operator, employees, agents, or Monitor Well Technicians knowing of its presence. If the discovery of product has not been reported, the Fuel Specialist shall immediately report it.

   3. (C) Statistical Inventory Reconciliation (SIR).

      1. (i) Deliveries, withdrawals and balance remaining must be recorded each operating day and data must be reconciled every thirty (30) days. Product deliveries must be reconciled with an appropriate device, and data must be reconciled every thirty (30) days. SIR records must demonstrate the following:

         1. (I) Report a quantitative result with a calculated leak rate;
         2. (II) Be capable of detecting a leak rate of 0.2 gallon per hour or a release of one hundred fifty (150) gallons within thirty (30) days, with a probability of detection of 0.95 and a probability of false alarm of 0.05; and
         3. (III) Use a threshold that does not exceed one-half (1/2) the minimum detectible leak rate.
      2. (ii) The tank must be equipped with a drop tube and measured for water at least every thirty (30) days.
      3. (iii) Records must be submitted to a certified SIR vendor for evaluation. Only third party certifications that have been reviewed and approved by the National Work Group on Leak Detection Evaluations (NWGLDE), found at the NWGLDE website, will be accepted (www.nwglde.org).
      4. (iv) Results of SIR analysis must be on premises for inspector review every thirty (30) days.
      5. (v) The equipment used must be capable of measuring the level of product over the full range of the tank's height to the nearest one-eighth inch (1/8").
      6. (vi) The regulated substance inputs are reconciled with delivery receipts by measurement of the tank inventory volume before and after delivery.
      7. (vii) SIR analysis reports must include a summary report of the quantitative results.

   4. (D) Automatic tank gauging (ATG).

      1. (i) The ATG must be in operating condition. It must perform a test at least once every thirty (30) days capable of detecting a 0.1 or 0.2 gallons per hour (gph) leak rate; and if the system detects a 0.2 gph leak rate, inventory reconciliation must be completed in conjunction with it.
      2. (ii) If the Fuel Specialist has concerns about the operation of the system, they may require notice and be present when an authorized person is printing relevant reports from the ATG.
   5. (E) Manual tank gauging. If manual tank gauging is the selected form of release detection Fuel Specialists must determine that the test duration is appropriate, and in accordance with OAC 165:25-3-6.26. Manual tank gauging may only be used on tanks 1,000 gallons or less.
   6. (F) Interstitial monitoring. Sampling or testing must be capable of detecting a leak at least every thirty (30) days in accordance with the manufacturer's instructions.
   7. (G) Other methods. If a method of leak detection other than those listed in this Chapter is used, it must be approved by PSTD and checked by the Fuel Specialist.
3. (3) Leak detection on pressurized lines. The Fuel Specialist must check for leak detection on pressurized piping. A complete list of requirements is in OAC 165:25-3-6.29 and OAC 165:26-3-20.2.

4. (4) Cathodic protection. The Fuel Specialist must ensure that cathodic protection is installed and in proper working order for all metal tanks and piping that routinely contain regulated substances or product and are in contact with the ground. Cathodic protection can be an impressed current or galvanic system with these requirements:

   1. (A) A site map and anode information should be made available to the Fuel Specialist and all tanks and lines must be protected.
   2. (B) Continuity tests must be conducted, and the soil-to-structure potential must be at least -0.85 volts.
   3. (C) Cathodic protection tests must be performed by a licensed cathodic protection tester once every three (3) years.
   4. (D) Rectifier readings on impressed current systems must be recorded at least every sixty (60) days and kept on site for review.

Added at 18 Ok Reg 1052, eff 5-11-01

Amended at 19 Ok Reg 1603, eff 6-13-02

Amended at 21 Ok Reg 2029, eff 7-1-04

Amended at 23 Ok Reg 1650, eff 7-1-06

Amended at 32 Ok Reg 768, eff 8-27-15

Amended at 33 Ok Reg 594, eff 8-25-16

Amended at 34 Ok Reg 922, eff 9-11-17

Amended at 35 Ok Reg 974, eff 10-1-18

Amended at 36 Ok Reg 535, eff 8-1-19

Amended at 41 Ok Reg, Number 23, effective 10-1-24