CHAPTER 15.  FUEL INSPECTION 
[OAR Docket #17-499]  
RULEMAKING ACTION:  
PERMANENT final adoption  
RULES:  
Subchapter 1. General Provisions  
165:15-1-1. Purpose [AMENDED]  
165:15-1-2. Definitions [AMENDED]  
165:15-1-3. Application of rules [AMENDED]  
Subchapter 3. Fuel Specialists, Testing, Accessibility, and Assistance  
Part 3. Motor Fuels and Antifreeze  
165:15-3-12. Fuel deliveries [AMENDED]  
Part 5. Liquid Measuring Devices  
165:15-3-16. Inspection for compliance [AMENDED]  
Part 7. Storage Tanks and Ancillary Equipment  
165:15-3-21. Containment of petroleum products [AMENDED]  
165:15-3-22. Equipment installation [AMENDED]  
Subchapter 15. Liquid Measuring Devices  
Part 7. Money Values and Volumes Dispensed  
165:15-15-28. Position of equipment and money value divisions [AMENDED]  
165:15-15-31. Primary elements [AMENDED]  
Subchapter 19. Violations and Contempt  
165:15-19-2. Enforcement procedure [AMENDED]  
165:15-19-4. Re-inspection, Enforcement and Fine Citation [AMENDED]  
AUTHORITY:  
The Commission's statutory authority is found in Article IX, Se ction 18 of the Oklahoma Constitu tion, and 17 O.S. §§ 52, 306, 3 07, 321, 
325, and 47 O.S. §466.  
SUBMISSION OF PROPOSED RULES TO GOVERNOR AND CABINET SECRETARY:  
Although the Oklahoma Corporation Commission is not subject to the requirements of Executive Order No. 2013-34, the proposed ru les 
were submitted to the Governor and Cabinet Secretary on September 21, 2016.  
COMMENT PERIOD:  
September 20, 2016 to December 23, 2016  
PUBLIC HEARING:  
January 24, 2017  
ADOPTION:  
January 24, 2017  
SUBMISSION OF ADOPTED RULES TO GOVERNOR AND LEGISLATURE:  
February 1, 2017  
APPROVED BY GOVERNOR’S DECLARATION:  
Approved by Governor's d eclaration on June 13, 2017  
FINAL ADOPTION:  
June 13, 2017  
EFFECTIVE:  
September 11, 2017  
SUPERSEDED EMERGENCY ACTIONS:  
n/a 
INCORPORATIONS BY REFERENCE:  
n/a 
GIST/ANALYSIS:  
OAC 165:15-1-1 is amended to include "antif reeze, motor oil, motor fuel", all of wh ich are Petroleum Storage Tank Division ("PS TD") 
regulated substances. OAC 165:15-1-2 is amended to incorporate by  reference the terms defined in 17 O.S. § 301 et seq., 47 O.S.  § 466 et seq., and 
52 O.S. § 325.1 et seq; to clarify the de finition of "Above ground stor age tank" or "AST" for tanks that contain any PSTD regul ated substance; to 
give an example of "Cathodic protection"; to clarify the meani ng of "Change in service"; and to include the underground piping under the definition 
of "Underground storage tank" or "UST." OAC 165:15-1-3 is amended to apply OAC 165:15 to all regulated substances. This amendme nt also 
requires that manufacturers of regulated substances test their pr oducts to ensure compliance with Commission rules, and that th e results of the tests 
are available upon Commission request. OAC 165: 15-3-12 is amended to match the federal regulations in 40 CFR 280.30 to ensure t hat available 
volume in the tank is greater than the volume of product to be tran sferred into the tank, and that violations of this Chapter m ay result in fines or 
contempt. OAC 165:15-3-16 is amended to cl arify wholesale liquid measuring device ca libration requirements. OAC 165:15-3-21 is amended to 
change "monthly" to "every thirty (30) days" for all methods of release detection per 40 CFR 280.41, and to clarify the specifi c requirements for 
statistical inventory reconciliation ("SIR" ) per 40 CFR 280.43. OAC 165:15- 3-22 is amended to remove  non-universal sentiment to wards vaults, 
and amend a rule citation regarding corrosi on protection. OAC 165:15-15-28 is amended to  require liquid measuring devices to au tomatically and 
accurately reflect the total money value of the petroleum pr oduct delivered. OAC 165:15-15-31 is amended to correct grammatical  errors and 
spelling. OAC 165-15-19-2 is ame nded to cite 40 Okla. Stat. §466 et seq . OAC 165-15-19-4 is amended to add a potential administrative penalty 
for violations that are not corrected.  
CONTACT PERSON:  
Zach Duvall, Assistant General Counsel, Office of General Couns el, Oklahoma Corporation Commission, 2101 N. Lincoln Blvd., P.O.  
Box 52000, Oklahoma City, OK 73152-2000, (405)521-4749, z.duvall@occemail.com.  PURSUANT TO THE ACTIONS DESCRIBED HERE IN, THE FOLLOWING RULES ARE CONSIDERED 
FINALLY ADOPTED AS SET FORTH IN  75 O.S., SECTIONS 250.3(5) AND 308(E), WITH AN EFFECTIVE 
DATE OF SEPTEMBER 11, 2017:  
SUBCHAPTER 1.  GENERAL PROVISIONS  
165:15-1-1.   Purpose  
The purpose of this Chapter is to provide a co mprehensive regulatory program governing the sale 
and storage of regulated substances such as anti freeze, motor oil, motor fuel, gasoline, kerosene, 
aviation fuel, and diesel fuel, and specify standards governing the measuring devices and 
facilities used to sell, dispense, or deliver thes e products. This Chapter is intended to protect the 
end user by regulating the integr ity and quantity of the product so ld; protect the public and the 
environment from fire, explosion and pollution; a ssist the tank owner/ope rator regarding how to 
maintain a petroleum storage tank system to a void damages or deterioration of the system, 
economic loss to the owner/operator, and damages to others.  
165:15-1-2.   Definitions  
     In addition to the terms defined in 17 O.S.  § 301 et seq., 47 O.S. § 466 et seq., and 52 O.S. § 
325.1 et seq.,Thethe following words or terms, when us ed in this Chapter, shall have the following 
meaning, unless the context cl early indicates otherwise. 
"API (American Petroleum Institute) gravity scale" means the gravity scale in general use by the 
petroleum industry in the United States. 
"ASTM" means the American Society for Testing a nd Materials. The late st ASTM revision 
must be the test used and is expre ssly incorporated in this Chapter. 
"ATG"  means an automatic tank gauging system. 
"Aboveground storage tank" or "AST" means any stationary tank not included within the 
definition of an underground storage tank in OAC 165:25-1-11, which is designed to contain, any 
PSTD regulated substances without structural support of earthen ma terial, antifreeze, motor oil, 
gasoline, diesel, aviation fu el and/or volatile blending materials used in motor fuels, like kerosene 
and ethanol. 
"Aboveground storage tank system" means an aboveground storage tank and any connected 
aboveground or underground piping, dispensers and associated equipment and fixtures. 
"Airport"  means landing facility for aircraft th at is routinely available for public use 
(whether routinely used or not). Airports as used in this Chapte r do not include private residential 
airstrips or private airports. 
"Analog type"  means an indicating element or a system  of indication or recording in which 
values are presented as a series of numbered gr aduations in combination with an index, and in 
which the most sensitive element of the indicatin g system moves continuously during the operation 
of the device. 
"Ancillary equipment"  means any device including, but not limited to, devices such as piping, 
fittings, flanges, valves, and pumps that are used to distribute, meter, or control the flow of 
regulated substances to or fr om an underground storage tank. 
"Approval seal" means an inspection label or tag pasted  on the face of a dispenser indicating 
its official approval, sh owing day, month, and year. 
"Aviation gasoline" means a volatile hydrocarbon fuel suitable  for use in an aircraft internal 
combustion engine. 
"Bulk plant" means a petroleum storage tank facility where regulated substances are 
received by tank vessels, pipelines, tank cars or ta nk vehicles and are stored or blended in mass quantities or bulk for the purpose of  distribution by a tank vessel, pipe line, tank car,  tank vehicle, 
portable tank or other container,  for wholesale or retail sale. 
"Calibrate" or "Calibration" means the comparison of  the indicated volume to the volume 
actually delivered by a retail or wholesale device into a certified test measure, prover, or through 
a second accurate meter. 
"Cathodic protection" means a technique designed to preven t the corrosion of a metal surface 
by making it the cathode of an electrochemical ce ll. For example, protec tion can be accomplished 
with an impressed current system or a galvanic anode system. 
"Change in service" means discontinuing the use of a storage tank system for purposes 
regulated by the Commissiona change  in the status of a storage tank (i.e., from curre ntly in use to 
temporarily out of use); change of regulat ed substance that a storage tank contains. 
"Commission"  means the Corporation Commission of Oklahoma. 
"Computing type" means a device designed to indicate and measure the total money value 
of product for one of a series of unit prices. 
"Diesel fuel" means a hydrocarbon or biodiesel fuel su itable for use in a diesel engine. 
"Digital type"  means a system of indicating or reco rding that advances intermittently in 
which all values are presented di gitally and without graduations. 
"Director"  means the Director of the Petroleum St orage Tank Division of the Corporation 
Commission. 
"Division"  means the Petroleum Storage Tank Di vision of the Cor poration Commission. 
"Dry hose type" means a device in which the discharg e hose must be completely drained 
following the mechanical operati ons involved in each delivery. 
"Face of the pump" means that side of a measuring device that displays the quantity 
measured. The face must include an indicator a nd a series of graduations or present values 
digitally. It is the side of the pump where th e unit price, volume dispensed, and dollar amount of 
the sale appear. 
"Fuel"  means any petroleum product, oxygenate, or blend of products suitable for use in 
an internal combusti on or diesel engine. 
"Fuel Specialist"  means any field inspector employe d by the Compliance and Inspection 
Department of the Petroleum Storage Tank Di vision of the Oklahoma Corporation Commission. 
"Gasoline" means a volatile unleaded fuel that is suitable for use in a spark ignition, internal 
combustion engine. 
"Gravity type"  means a type of device designe d for discharge by gravity. 
"Gum" means the evaporation residue of aircraft  gasoline or the hept ane insoluble portion 
of the evaporation resi due of moto r gasoline. 
"Index of an indicator" means that particular portion of an indicator that is directly used in 
making a reading. 
"Indicating element" means that component located on the face of the pump that signifies the 
amount relative to a quantity measured by a measuring device. 
"Isooctane" means a pure hydrocarbon 2,2,4-tr imethylpentane used as a reference fuel that 
has an octane rating of one hundred. 
"Kerosene"  means a refined hydrocarbon fuel intended for use in heating and illumination. 
"Liquid measuring device"  or "liquid fuel device" means any and all measuring devices (retail, 
wholesale, or vehicle tank measure) with which gasoline, motor fuel, kerosene, burning oil, diesel 
fuel, or aviation gasoline is sold, dispensed, or delivered to the public or to any person for any purpose. "MtBE"  means methyl tertiary butyl ether for use as a component in gasoline. 
"Manufacturer"  means any person engaged in the ma nufacture of gasoline, motor fuel, 
kerosene, aviation gasoline, diesel  fuel, burning oil, or oxygenate o ffered for sale or use in the 
State of Oklahoma, whether such products are manufactured by the met hod of processing crude 
petroleum or natural gas or collecting natural or dr ip gasoline or the blending or mixing of any two 
or more products obtained from these processing  methods. Blending or mixing, as used in this 
Chapter, does not include the multi-blend pumps at service stations. 
"Measuring device" or "meter" means all measuring device s (retail, wholesale, or vehicle 
tank measure) with which gasoline, motor fuel, ke rosene, burning oil, diesel fuel, or aviation 
gasoline is sold, dispensed, or delivered to the public or to any person for any purpose. 
"Motor fuel"  means any petroleum product, oxygenate, or  blend of products, that is suitable 
for use as a fuel in an internal combustion or diesel engine. 
"NACE"  means the National Association of Corrosion Engineers. 
"N-heptane" means a pure hydrocarbon used as a reference fuel with an assigned octane 
rating of zero. 
"Octane", "octane number", or "octane rating" means the an tiknock quality of gasoline as 
determined by either the ASTM Research Method or the ASTM Motor Method. 
"Owner or operator"  means the person responsible for and in control of a facility's day-to-
day operations, whether the person actually possesses a title to the facility or controls it as a lessee 
or by any other agreement. The term also includes  a past operator at the time of a release or a 
violation of state statut es or Commission rules. 
"Oxygenate" means ethyl alcohol, MtBE, TAME, or  other oxygen-containing, ashless 
organic compounds. 
"Permanent out of use" or "POU" means a petroleum storag e tank system that is not in 
service/use, does not contain regul ated substances, and is not inte nded to be placed back in 
service/use. 
"Petroleum products" means antifreeze, motor oil, gasolin e, kerosene, ethanol, diesel and 
biodiesel fuel and aviation gasoline. 
"Primary indicating elements" or "recording elements" means those principal visual indicating 
elements and recording elements that may be us ed by the operator in th e normal commercial use 
of a device and which are read ily visible to the public. 
"Private airport"  means an airport used only by its owner and regulated as a fleet and 
commercial facility. 
"Private airstrip"  means a personal residential takeoff and landing facility attached to the 
airstrip owner's home, analogous to a gara ge and driveway used only by the owner. 
"PSTD" means Petroleum Storage Tank Division. 
"(R+M)/2" means the arithmetic mean of the AS TM Research Method (R) and the ASTM 
Motor Method (M) octane numbers , and is the octane rating. 
"Regulated substance"  means antifreeze, motor oil, motor fu el, gasoline, kerosene, diesel or 
aviation fuel. It does not include compressed natural gas, liquid natural gas and propane. 
"Retail device" means a measuring device or mechanis m designed for single deliveries of 
motor fuels to individual la nd, air, and water vehicles. 
"Retail level" means all places of business where gasoline, motor fuel, kerosene, diesel fuel, 
or aviation gasoline is dispensed or delivered directly into the tank of the consuming vehicle or 
receptacle, and may include bulk agents, cons ignment agents, distributors, or jobbers. 
"SIR"  means Statistical Inve ntory Reconciliation. "Security Seal" or "seal" or "lock/locking mechanism" means a lead and wire seal, lock or 
locking device, or similar device, attached to a petroleum storage tank  system for protection 
against access, removal, or adjustment. 
"TAME" means tertiary amyl methyl ether fo r use as a component in gasoline. 
"Temporary out of use" or "TOU" means the status of a pe troleum storage tank system that 
has been taken out of service/use, but not rem oved, with the intent to return to service. 
"Tolerance" means a value fixing the limit of allowabl e error or departure from the highest 
performance or value. 
"Transport calibration" or "truck calibration" means the vol ume held to the designated marker 
as determined by the addition of a calibration flui d to the compartment from an accurate meter or 
from provers. 
"Underground storage tank" or "UST" means a regulated st orage tank, includ ing underground 
piping, that has 10 percent (10%) or more of its volume ben eath the surface of the ground. 
"Underground storage tank system" means an underground storage tank and any connected 
aboveground or underground piping, disp ensers and ancillary equipment. 
"Unleaded gasoline" means a refined gasoline to which no lead has been intentionally added 
during the refining or blending process. 
"Visible type" means a type of device in which the m easurement takes place in visible glass 
measuring chambers. 
"Wet-hose type"  means a device designed to be oper ated with the discharge hose full of 
liquid at all times. 
"Wholesale device"  means any device other than a retail device. 
 
165:15-1-3.   Application of rules  
(a)    The rules contained in this Chapter apply to: (1)    All manufacturers and handlers of fuel subject to the jurisdic tion of the Commission. 
(2)    All persons who sell or distribute any petroleum product, motor fuelregulated substance, 
oxygenate, or blend of products. 
(b)    All persons who use liquid measuring devices  in the sale or distribution of motor fuel, as 
defined by applicable statutes and (a) of this Section, must comply with this Chapter. 
(c)    Motor fuel in transit or manufactured in  Oklahoma for consumption in other states is not 
subject to inspection under the rules of this Chapter. (d)    The tolerances on metric equipment must be  equivalent to those specified in English units 
for similar equipment. (e)    All regulated substances manufactured in, or imported into, the State of Oklahoma for use or 
sale must be tested by the manufact urer or importer to ensure its co mpliance with the rules of this 
Chapter. 
(f)    The results of these tests, together w ith any other information required by the Commission, 
must be maintained by the manufacturer in accordance with usual and customary business 
practices, and copies must be furnished to the Petroleum St orage Tank Division upon request. 
These test results, excluding trade secrets and propr ietary information, must also be furnished to 
the wholesale dealer of th e manufacturer upon request. 
 
   
 SUBCHAPTER 3.  FUEL SPECIALISTS, TESTING, ACCESSIBILITY, AND ASSISTANCE  
PART 3.  MOTOR FUELS AND ANTIFREEZE 
 
165:15-3-12.   Fuel deliveries  
     Deliveries of fuel made for a ll facilities must be conducted as follows: 
(1)    No facility owner or ope rator may accept delivery of lower oc tane fuel into a higher octane 
tank, except when the tank's resulting octane level m eets or exceeds the tank's labeled octane level. 
(2)    When delivering fuel into a storage ta nk, no person may purposefully  disable a tank's overfill 
valve for any reason. (3)    Any violation of this Section will be subj ect to the enforcement procedures of this Chapter 
and any other fines or contempt proceedings as provided by law.Owners, operators, their 
employees or agents, or transporters must ensure that the volume available in the tank (ullage) is 
greater than the volume of  product to be transferred to the tank before the transfer is made and that 
the transfer operation is monitored consta ntly to prevent spilling and overfilling. 
(4)    Any violation of this Section will be subj ect to the enforcement procedures of this Chapter 
and any other fines or contempt proceedings as provided by law. 
 
PART 5.  LIQUID MEASURING DEVICES 
 
165:15-3-16.   Inspection for compliance  
(a)    Retail liquid measuring devi ces subject to the rules of this Chapter are calibrated with a five 
(5) gallon test measure by the Fuel Specialist from time to time or as often as deemed necessary. 
High volume dispensers (those that are used to pump at a rate of  at least twenty (20) gallons per 
minute) used to fill large tanks must be calibrated using a fifty (50) or one hundred (100) gallon prover. (b)    All wholesale liquid measuring devices subject  to the rules of this Chapter must be calibrated 
by the Fuel Specialist no more thanbefore 10 milli on gallons of use, or more often if the Fuel 
SpecialistPSTD deems it necessary. 
(c)    Before a new facility is open for business an d before new dispensers are put into service at a 
pre-existing facility, the ow ner or operator must have the dispen sers calibrated and be able to show 
written proof when requested  by the Fuel Specialist. 
(d)    These tests may be ordered or directed by the Comm ission at any time. 
(e)    When a liquid measuring device is found not to be in compliance with this Chapter, the owner 
or operator will be advised of the problem and the device placed out of service. (f)    A Fuel Specialist has the re sponsibility to place or to direct that a lock or seal be placed on a 
measuring device. The lock or seal must remain in place until the defectiv e measuring device is 
repaired or replaced and complie s with Commission standards. 
(g)    The owner or operator of a locked meas uring device may obtain permission to remove the 
lock or seal after repair by: (1)    Written permission from the Fuel Specialist who placed the lock or seal on the device; coupled with written confirmation to PSTD by the person removing the seal or lock; or 
(2)    Written or verbal permission from the Pe troleum Storage Tank Division Director or the 
Director's designee; or (3)    Order of the Commission. 
 
 
 PART 7.  STORAGE TANKS AND ANCILLARY EQUIPMENT 
 
165:15-3-21.   Containment of petroleum products  
     Because petroleum product releases can pose a threat to the public health and safety and the 
environment, Fuel Specialists must ensure that the proper mechanisms are in place and standards 
met to prevent releases. (1)     
Spill and overfill protection. Fuel Specialists must ensure th at appropriate spill and overfill 
protection devices are in place and operational. (2)     
Leak detection on tanks. Fuel specialists must check the c ondition of an owner or operator's 
selected method(s) of leak detection at a loca tion. The requirements of each method listed below 
are offered as a general outline; a complete list of leak detection requirements is in Chapter 25 and Chapter 26 of Commission rules. (A)     
Vapor monitoring wells. If vapor monitoring wells are an owne r or operator's selected method 
of leak detection, the Fuel Speci alist must ensure that the requ irements listed below are met: 
(i)    Wells must be correctly installed and sufficient in number for the particular facility. 
(ii)    A monitoring well site assessment must  be completed with doc umentation of Commission 
acceptance kept on site for review. (iii)    Wells must be properly monitored and the results recorded every 30 days on the appropriate 
OCC form. 
(iv)    Any single vapor monitoring well r eading above 4,000 units/ppm for gasoline and 1,500 
units/ppm for diesel shall be  reported to a Commission Pr oject Environmental Analyst by 
telephone at (405) 521-4683 (if af ter hours or on weekends or ho lidays, call the PSTD emergency 
number at (405) 823-0994) within 24 hours of th e owner or operator, agents, Monitor Well 
Technicians, or any of his or her employees at  the facility knowing the reading. If gasoline and 
diesel tanks are in the same tankpit, any readi ng above 1,500 units/ppm shall be reporte d. If this 
has not been reported, the Fuel  Specialist shall report it. 
(B)     
Groundwater monitoring wells. The Fuel Specialist must ensure, if groundwater monitoring wells 
are an owner or operator's method of leak det ection, that the requirements listed below are met: 
(i)    Wells must be correctly installed and sufficient in number for the particular facility. 
(ii)    A monitoring well site assessment must  be completed with doc umentation of Commission 
acceptance kept on site for review. (iii)    Wells must be properly monitored and the results recorded every 30 days on the appropriate OCC form. (iv)    Any indication of product discovere d 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 or operator, 
agents, Monitor Well Technicians, or any of his or her employees at the facility knowing of its 
presence. If this has not been report ed, the Fuel Specialist shall report it. 
(C)     
Tank system tightness testing with monthly inventory control. When performed in accordance with 
the following requirements, this combination of f unctions is a stand-alone method of leak detection 
for tanks. This method expires ten (10) years after the corrosion pr otection upgrade of your tank(s) 
to 1998 standards or ten (10) years after a new tank is installed. This will expire June 30, 2018. 
(i)     Tank tightness testing. Tank tightness testing (or another test of equivalent performance) must 
be capable of detecting a 0.1 gall on per hour leak rate from any por tion of the tank while accounting 
for the effects of thermal expansion or contracti on of the product, vapor poc kets, tank deformation, 
evaporation or condensation, and th e location of the water table. Th e test must be performed by a 
tester certified by the manufacturer of the testing equipment, and completed once every five years. (ii)     Inventory control.  
(I)    Product inventory control (or another test  of equivalent performance) must be conducted 
monthly to detect a release of at least 1.0 perc ent of flow-through plus 130 gallons on a monthly 
basisevery thirty (30) days. 
(II)    Inventory volume measurements for regul ated substance inputs, withdrawals, and the 
amount remaining in the tank are recorded each operating day. (III)    The equipment used is cap able of measuring the level of product over th e full range of the 
tank's height to the neares t one-eighth inch (1/8"). 
(IV)    The regulated substance inputs are reconcil ed with delivery receipts by measurement of the 
tank inventory volume before and after delivery. (V)    Deliveries are made through a drop tube that  extends to within 6 inches (6") of the tank 
bottom. (VI)    Product dispensing is metered and recorded  within an accura cy of 6 cubic inches for every 
5 gallons of product withdrawn. (VII)    The measurement of any water level in th e bottom of the tank is made to the nearest one-
eighth inch (1/8") at least once a month. (VIII)    Use of OCC Monthly Inve ntory Reconciliation Form or an el ectric equivalent is required. 
(D)     
Statistical Inventory Reconciliation (SIR).  
(i)    Deliveries, withdrawals and balance rema ining must be recorded each operating day on the 
PSTD Inventory Reconciliation Form or an electr onic equivalent and data must be reconciled 
every thirty (30) days. Product de liveries must be reconciled with an appropriate device, and data 
must be reconciled monthlyevery thirty (30) da ys. SIR records must demonstrate the following: 
(I)    Report a quantitative result with a calculated leak rate; 
(II)    Be capable of detecting a leak rate of  0.2 gallon per hour or a re lease of one hundred fifty 
(150) gallons within thirty (30) days, with a proba bility of detection of 0.95 and a probability of 
false alarm of 0.05; and 
(III)    Use a threshold that does not exceed one -half (1/2) the minimum detectible leak rate. 
(ii)    The tank must be equipped with a drop tu be and measured for water at least monthlyevery 
thirty (30) days. 
(iii)    Records must be submitted to a certifie d SIR vendor for monthly evaluation. Only third 
party certifications that have been reviewed  and approved by the National Work Group on Leak 
Detection Evaluations (NWGLD E), found at the NWGLDE we bsite, will be accepted 
(www.nwglde.org). 
(iv)    Results of monthly SIR analysis must be on premises no later than the last day of the 
following month for inspector revi ew every thirty (30) days. 
(v)    The equipment used must be capable of measuring the level of product over the full range of 
the tank's height to the near est one-eighth inch (1/8"). 
(vi)    The regulated substance inputs are reconciled with delivery  receipts by measurement of the 
tank inventory volume before and after delivery. 
(vii)    SIR analysis reports must include a summa ry report of the quantit ative results and copies 
of all Inventory Reconciliation Forms. 
(E)     Automatic tank gauging (ATG).  
(i)    The ATG must be in ope rating condition. It must perform a monthly test at least once every 
thirty (30) days capable of det ecting a 0.1 or 0.2 gallons  per hour (gph) leak ra te; and if the system 
detects a 0.2 gph leak rate, mont hly inventory reconciliation must  be completed in conjunction 
with it. (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. 
(F)     Manual tank gauging. If manual tank gauging is the selected  form of release detection Fuel 
Specialists must determine that th e test duration is appropriate, and that tank tightness testing is 
performed in conjunction with manual tank gaug ing in accordance with Chapter 25 or Chapter 26 
of Commission rules. Manual tank gauging is only accepted as a method of leak detection on tanks 
with a capacity of up to 2,000 gallons. (G)     
Interstitial monitoring. Sampling or testing must be capable of detecting a releaseleakmonthlyat 
least every thirty days in accordance with the manufacturer's instructions. 
(H)     Other methods. If a method of leak detection other than those listed in this Chapter is used, it 
must be approved by the Commission a nd checked by the Fuel Specialist. 
(3)     Leak detection on pressurized lines. The Fuel Specialist must check for leak detection on 
pressurized piping. A complete list of requirement s is in Chapter 25 and Chapter 26 of Commission 
rules. All pressurized piping must have electron ic/automatic or mechanical line leak detectors 
capable of detecting a three gallons per hour l eak. New installations and facilities replacing a 
piping system must have double-wall ed piping. An annual line tightne ss test is re quired unless the 
alternative criteria listed  in (C) below are met. 
(A)     Electronic/automatic and mechanical lin e leak detectors; sump sensors, fl oats and similar mechanical devices.  
(i)    Automatic electronic or mechanical line le ak detectors must be in stalled on all pressurized 
lines. Double-walled piping systems must have di spenser and tank sumps with a sensor, float or 
similar mechanical device installed at each submersi ble pump or at the lowest sump at the lowest 
island for each tank, whichever is at th e lowest end of the piping gradient. 
(ii)    The line leak detectors, floats and ot her devices must be test ed annually according to 
manufacturer's specifications. (B)     
Annual line tightness testing. An annual line tightness test, either  hydrostatic or electronic, must 
be performed unless the require ments of (C) below are met. 
(C)     Alternative to line tightness testing. A certified electronic line leak detector may be used in lieu 
of an automatic mechanical line leak detector and annual tightness test only if: 
(i)    The system is capable of detecting and test s for a leak of 3 gallons per hour before or after 
each operation of the submersible turbine pump; and (ii)    The system is capable of detecting and tests for a leak of 0.2 gall ons per hour at least once 
every month; and (iii)    The system is capable of detecting and tests for a leak of 0.1 ga llons per hour annually, and 
the system is tested annually in accord ance with manufacturer's specifications. 
(D)     
Vapor monitoring wells. If vapor monitoring wells are an owne r or operator's selected method 
of leak detection, the Fuel Speci alist must ensure that the requ irements listed below are met: 
(i)    There must be a sufficient number of we lls limited to a 20-foot radius around the lines, and 
the wells must be properl y marked and secured. 
(ii)    Wells must be correctly installed, a nd the OCC approved monitoring well site assessment 
must be made available to the Fuel Specialist. (iii)    Wells must be properly monitore d and the results recorded every 30 days. 
(E)     
Interstitial monitoring.  
(i)    All double-walled piping must  be sloped to allow a leak to fl ow to the sump at the tank or 
dispensers. (ii)    Containment sumps connected to product piping must be equipped with at least one sump 
sensor at the lowest end of the piping gradient. (iii)    Sump sensors must detect any liquid or  leaking petroleum product in accordance with the 
manufacturer's specifications. (4)     
Suction piping. A line tightness test must be pe rformed every 3 years according to 
manufacturer's specifications unless one of the line leak detection methods listed above is used, or 
unless it is safe suction piping that m eets the specifications of (5) below. 
(5)     Safe suction piping. No annual line tightness test and no leak detection method is required if 
piping meets these specifications: below-grade pi ping must operate under vacuum, be sloped to 
allow product to drain back into the tank, and have only one check valve installed on each line 
directly below the pump. Compliance with these st andards must be readily determined by the Fuel 
Specialist. (6)     
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 re gulated substances or 
product and are in contact with the ground. Cathodic protection can be an impressed current or 
galvanic system with these requirements: (A)    A site map and anode information should be  made available to the Fuel Specialist and all 
tanks and lines must be protected. (B)    Continuity tests must be  conducted, and the soil-to -structure potential mu st be at least -0.85 
volts. (C)    Rectifier and cathodic pr otection tests must be performe d by a qualified cathodic protection 
tester once every three years. (D)    Rectifier readings on impressed current syst ems must be recorded at least every 60 days and 
kept on site for review.  
165:15-3-22.   Equipment installation  
     Fuel Specialists must ensure that tanks  and ancillary equipment are installed properly and 
conform to Commission standards. These standards apply to all facilities. Requirements are listed 
in detail in Chapter 25 and Ch apter 26 of Commission rules. 
(1)     Unattended self-service stations.  
(A)    Operating instructions must be conspicuously posted. 
(B)    There must be a properly placed emer gency shutoff device and conspicuously posted 
emergency instructions. A telephon e or other approved means of co mmunication to notify the fire 
department. (2)     
Emergency pressure release venting. Aboveground storage tanks must have some form of 
construction or device that will relieve excessive internal pressure caused by exposure to fires, and have some form of emergency pressure venting. Th is applies to all compar tments and interstitial 
spaces of tanks, and any enclosed spaces  around tanks that can contain liquid. 
(3)     
Release vent construction. An aboveground tank must have some form of pressure-relieving 
construction to appropriately control and direct a tank rupture. The tank owner or operator must 
present, upon request, evidence ce rtifying the construction if th e owner has the information. 
(4)     Venting and venting specifications. The Fuel Specialist will ensure that vent piping size, height, 
width, placement and construction meet approve d standards, vent vapors upward and do not 
present collision or fire hazards. (5)     
Piping requirements. The Fuel Specialist must ensure pipi ng is appropriately constructed and 
protected from physical damage and corrosion where appropriate. Appropriat e valves must be in 
place in piping to prevent leaks and fires. A boveground storage tank piping and associated parts 
such as flanges and bolts must be constructe d to resist fire to the appropriate extent. (A)    All new aboveground or underground pipi ng must be installed in accordance with 
requirements of either Chapter 25 or Chapter 26 of Commission rules. 
(B)    Pressurized piping must have automatic line  leak detectors with one sensor, float or similar 
mechanical device at each submersible pump, or at  the lowest sump at the lowest island for each 
tank, whichever is at the lowest  end of the piping gradient. 
(6)     Equipment and materials. All pipes, valves, couplings, faucets, flexible connectors, fittings and 
other pressure-conta ining parts must meet material specif ications and pressure and temperature 
limitations, adhering to Commission standards. Underground equipment must be cathodically 
protected where appropriate and aboveground equipmen t must resist fire to the approved extent. 
Impact/shear valves and breakaway valves must be  in place to prevent leaks and stop their flow in 
an emergency. (7)     
Electrical equipment. All electrical equipmen t must meet the requirements NFPA 70, the 
National Electrical Code, as it applies to wet, damp and hazard ous conditions. All el ectrical wiring 
and equipment must be suitable for the locations in  which it is installed, and required emergency 
switches must be provided and appropriately placed. 
(8)     Vault requirements. Vaults are superior installation system s that are not required, but can be 
used above or below grade and must meet stan dards listed in 165:26-2-71 of Commission rules. 
The Fuel Specialist will ensure that those standards are met. 
(9)     Fill pipes. Fill pipes must be properly installed and labeled, and overfill sump lids must be 
color-coded or properly labeled with permanent markings. (10)     
Collision barriers. Aboveground storage tanks and all dispen sers exposed to traffic must be 
resistant to damage from the impact of a moto r vehicle or be protecte d by suitable collision 
barriers. Secondary containment ma y serve as a collision barrier. 
(11)     Fencing requirements. All aboveground tanks must be enclos ed by an appropriate security 
fence. (12)     
Spill Prevention Control and Countermeasure Plan. Owners or operators of aboveground storage 
tanks must have a Spill Prevention Control and Countermeasure Plan (SPCC Plan) completed in 
strict accordance with  the requirements of Environmenta l Protection Agency 40 CFR 112, and 
updated every five years. Each facil ity location must have its own plan. 
(13)     Corrosion protection. Any portion of a tank or its piping syst em that routinely contain regulated 
substances or product and in cont act with the soil must be prot ected from corrosion by a properly 
engineered, installed and mainta ined cathodic protection system in accordance with recognized 
standards of design listed in 165:26-3-80, 3-81, and 3-82OAC 165: 26 Subchapter 2, Part 4 of 
Commission rules. A tank sitting on a concrete pa d will be considered in contact with the soil 
unless it is insulated from the conc rete by some dielectric material. 
(14)     Storage tank spacing and buffer distances.  
(A)    Aboveground storage tanks must be appropri ately spaced; the Fuel Specialist will determine 
whether the spacing is in accordance w ith Chapter 26 of Commission rules. 
(B)    Minimum distances from aboveground storag e tanks must also be maintained between tanks 
and the nearest important building on the same property, fuel dispensers, public ways, and property lines. (15)     
Secondary containment requirements for aboveground storage tanks. Double-walled tanks do not 
require additional containment if conditions  listed in OAC 165: 26-2-31 are satisfied. 
 
   SUBCHAPTER 15.  LIQUID MEASURING DEVICES  
PART 7.  MONEY VALUES AND VOLUMES DISPENSED 
 
165:15-15-28.   Position of equipment and money value divisions  
(a)    A measuring device equi pped with a primary indicating el ement, as described in 165:15-15-
31 and used in direct sales to the public, must be positioned so that its indications may be accurately read and the measuring operation may be observed from some r easonable "customer" position. 
(b)    The money value and dispensed liquid vol ume readings on the primary indicating elements 
must be the ones used for determining the mone y and volume amounts in any sale to the public. 
The value of the graduated intervals represen ting money values on a computing type liquid 
measuring device with analog indications must be not  more than one (1) cent at all unit prices up 
to and including $2.99The device must automati cally and accurately co mpute the total money 
value of the petroleum product deliv ered at the posted unit price. 
(c)    On a computing type liquid measuring de vice with digital indications, the money values, 
mathematical agreement, and the total price computation must be based on quantities not 
exceeding 0.001 gallon intervals for devices indi cating in inch-pound units and 0.002 liters for 
devices indicating in metric units.  
165:15-15-31.   Primary elements  
(a)     General. A liquid measuring device must be equippe d with a primary indicating element and 
may also be equipped with a primary recording element. (b)     
Units. AliquidA liquid measuring device must indi cate, and if the device isbe equipped to 
must record, its deliveries in term s of gallons, liter, or decimal s ubdivisions of the gallon or liter. 
(c)     Value of smallest unit. The value of the smallest unit of i ndicated delivery, and recorded delivery 
if the device is equipped to  record, must not exceed: 
(1)    One thousandth (.001) gallon or two thousa ndth (.002) liter on digital type retail devices, or 
one-tenth (0.1) gallon or one-tenth (0.1) liter on analog type systems. 
(2)    One gallon or one liter on wholesale devices. 
(d)     Return to zero. Primary indicating and recording el ements must advance only by the 
mechanical or electronic operation of the measur ing device. However, a measuring device may be 
cleared by advancing its elem ents to zero, but only if: 
(1)    The advancing movement, once started, cannot be stopped until zero is reached; or 
(2)    In the case of indicating elements only, su ch elements are automatically obscured until the 
elements reach the correct zero position. (e)     
Return to zero (key-lock). The primary indicating elements, and primary recording elements if 
the device is equipped to record, mu st be readily returnable to a de finite zero indication. However, 
a key-lock or other self-operated device may be equipped with cumulative indicating or recording 
elements, provided that it is also equipped with a zero-return indicating el ement. Means must be 
provided to prevent the return of  primary indicating elements, and of primary recording elements 
if the device is so equipped, beyond their correct  zero position. 
 
   
 
  SUBCHAPTER 19.  VIOLATIONS AND CONTEMPT 
 
165:15-19-2.   Enforcement procedure  
     In addition to the contempt procedures described in Chapter 5 of  Commission rules, the 
following procedure for violations may be followed: (1)    The PSTD Director or designee may issue a Field Citation for any viol ation or violations of 
the rules of this Chapter, and/ or 17 O.S. §301 et seq., 47 O.S. §466 et seq., and/or 52 O.S. §321 et 
seq., and/or 83 O.S. §111 et seq., and amendments thereto. 
(2)    A copy of the Field Citation must  be furnished to the owner or operator. 
(3)    The Field Citation must be  authorized by the PSTD Director. 
(4)    Prior to issuing a Field Citation to an owne r or operator, the approval of the Director of the 
Petroleum Storage Tank Division must be obtained.  
165:15-19-4.   Re-inspection, Enforcement and Fine Citation  
(a)    After the date that the violation is to be corrected, a Fuel Specialist will re-inspect the storage 
tank facility to verify that th e violation has been corrected. 
(b)    If the re-inspection shows that the violation has not been co rrected, the Fuel Specialist will: 
(1)    Refer the violation to the Division's Compliance and Inspection Manager for enforcement 
action; and/or 
(2)    If the storage tank facility constitutes an immediate hazard, it may be shut down pending a 
correction of the problem or a hearing on the issue. (3)    Re-inspection of violations  that are uncorrected shall be s ubject to an administrative penalty 
set forth in OAC 165:25 Appe ndix S or 165:26 Appendix G. 
[OAR Docket #17-499; filed 6-23-17]