reglab/statecodes huggingface dataset:
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.9 - Lender Liability › Section 11-5-2.9-280.120 - Definitions

Current through June 25, 2024
(a) UST technical standards, as used in this
				  rule, refers to the UST preventative and operating requirements under Rule 2.2,
				  2.3, 2.4, 2.7, and 2.10 of this part and § 280.50.
(b) Petroleum production, refining, and
				  marketing.
(1) Petroleum production means the
				  production of crude oil or other forms of petroleum (as defined in §
				  280.12 ) as well as the production of petroleum products from purchased
				  materials.
(2) Petroleum refining
				  means the cracking, distillation, separation, conversion, upgrading, and
				  finishing of refined petroleum or petroleum products.
(3) Petroleum marketing means the
				  distribution, transfer, or sale of petroleum or petroleum products for
				  wholesale or retail purposes.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.9 - Lender Liability › Section 11-5-2.9-280.121 - Participation in management

Current through June 25, 2024
The term "participating in the management of an UST or UST
					 system" means that, subsequent to the effective date of this rule, [INSERT
					 EFFECTIVE DATE], the holder is engaging in decision making control of, or
					 activities related to, operation of the UST or UST system, as defined
					 herein.
(a) Actions that are
				  participation in management.
(1)
				  Participation in the management of an UST or UST system means, for purposes of
				  this rule, actual participation by the holder in the management or control of
				  decision making related to the operation of an UST or UST system. Participation
				  in management does not include the mere capacity or ability to influence or the
				  unexercised right to control UST or UST system operations. A holder is
				  participating in the management of the UST or UST system only if the holder
				  either:
(i) Exercises decisionmaking control
				  over the operational (as opposed to financial or administrative) aspects of the
				  UST or UST system, such that the holder has undertaken responsibility for all
				  or substantially all of the management of the UST or UST system; or
(ii) Exercises control at a level comparable
				  to that of a manager of the borrower's enterprise, such that the holder has
				  assumed or manifested responsibility for the overall management of the
				  enterprise encompassing the day-to-day decision making of the enterprise with
				  respect to all, or substantially all, of the operational (as opposed to
				  financial or administrative) aspects of the enterprise.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.9 - Lender Liability › Section 11-5-2.9-280.122 - Ownership of an underground storage tank or underground storage tank system or facility or property on which an underground storage tank or underground storage tank system is located

Current through June 25, 2024
Ownership of an UST or UST system or facility or property
					 on which an UST or UST system is located. A holder is not an "owner" of a
					 petroleum UST or UST system or facility or property on which a petroleum UST or
					 UST system is located for purposes of compliance with the UST technical
					 standards as defined in § 280.120(a), the UST corrective action
					 requirements under §§ 280.51 through 280.67, and the UST financial
					 responsibility requirements under §§ 280.90 through 280.111, provided
					 the person:
(a) Does not participate
				  in the management of the UST or UST system as defined in § 280.121;
				  and
(b) Does not engage in
				  petroleum production, refining, and marketing as defined in §
				  280.120(b).
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.10 - UST Systems with Field › Section 11-5-2.10-280.130 - Definitions

Current through June 25, 2024
For purposes of this rule, the following definitions
					 apply:
Airport hydrant fuel distribution system
(also called airport hydrant system) means an UST system which fuels aircraft
					 and operates under high pressure with large diameter piping that typically
					 terminates into one or more hydrants (fill stands). The airport hydrant system
					 begins where fuel enters one or more tanks from an external source such as a
					 pipeline, barge, rail car, or other motor fuel carrier.
Field-constructed tank
means a tank
					 constructed in the field. For example, a tank constructed of concrete that is
					 poured in the field, or a steel or fiberglass tank primarily fabricated in the
					 field is considered field-constructed.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.10 - UST Systems with Field › Section 11-5-2.10-280.131 - General requirements

Current through June 25, 2024
(a)
Implementation of requirements.
Owners and operators must
				  comply with the requirements of this part for UST systems with
				  field-constructed tanks and airport hydrant systems as follows:
(1) For UST systems installed on or before
				  October 5, 2018, the requirements are effective according to the following
				  schedule:
Requirement
Effective date
Upgrading UST systems; general operating
								requirements; and operator training
October 5, 2021.
Release detection
October 5, 2021.
Release reporting, response, and investigation;
								closure; financial responsibility and notification (except as provided in
								paragraph (b) of this section)
October 5, 2018.
(2)
				  For UST systems installed after October 5, 2018, the requirements apply at
				  installation.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Rule 11-5-2.10 - UST Systems with Field › Section 11-5-2.10-280.132 - Additions, exceptions, and alternatives for UST systems with field-constructed tanks and airport hydrant systems

Current through June 25, 2024
(a)
Exception to piping secondary containment requirements.
Owners
				  and operators may use single walled piping when installing or replacing piping
				  associated with UST systems with field-constructed tanks greater than 50,000
				  gallons and piping associated with airport hydrant systems. Piping associated
				  with UST systems with field-constructed tanks less than or equal to 50,000
				  gallons not part of an airport hydrant system must meet the secondary
				  containment requirement when installed or replaced.
(b)
Upgrade requirements.
Not later than October 5, 2021, airport hydrant systems and UST systems with
				  field-constructed tanks where installation commenced on or before October 5,
				  2018, must meet the following requirements or be permanently closed pursuant to
				  Rule 2.7 of this part.
(1)
Corrosion
				  protection.
UST system components in contact with the ground that
				  routinely contain regulated substances must meet one of the following:
(i) Except as provided in paragraph (a) of
				  this section, the new UST system performance standards for tanks at §
				  280.20(a) and for piping at § 280.20(b); or
(ii) Be constructed of metal and cathodically
				  protected according to a code of practice developed by a nationally recognized
				  association or independent testing laboratory and meets the following:
(A) Cathodic protection must meet the
				  requirements of § 280.20(a)(2)(ii), (iii), and (iv) for tanks, and §
				  280.20(b)(2)(ii), (iii), and (iv) for piping.
(B) Tanks greater than 10 years old without
				  cathodic protection must be assessed to ensure the tank is structurally sound
				  and free of corrosion holes prior to adding cathodic protection. The assessment
				  must be by internal inspection or another method determined by the implementing
				  agency to adequately assess the tank for structural soundness and corrosion
				  holes.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-3 - TYPES OF CATHODIC PROTECTION › Section 11-5-2-280.1-3-3.1 - General

Current through June 25, 2024
The two types of cathodic protection that are typically
						installed on UST systems are galvanic (sacrificial anode) and impressed current
						systems. An attempt to explain the principles involved in the theory of
						cathodic protection is beyond the scope of this document and it is assumed the
						reader has a basic understanding of the subject. However, stated in the
						simplest terms, both of these types of cathodic protection attempt to reverse
						the flow of electric current away from the metal that is intended to be
						protected from corrosion. Both types of cathodic protection prevent electric
						current from leaving the protected structure by supplying an electrical charge
						in the form of DC power sufficient to overcome any current that would otherwise
						leave the structure. The way in which the required electrical current is
						provided is what distinguishes the two types of cathodic
						protection.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-3 - TYPES OF CATHODIC PROTECTION › Section 11-5-2-280.1-3-3.2 - Galvanic Systems

Current through June 25, 2024
Galvanic systems are also known as sacrificial anode
						systems because an anode (usually zinc or magnesium) corrodes instead of the
						protected metal. Because the anode corrodes instead of the metal that it is
						protecting, the anode is said to sacrifice itself. Sacrificial anodes are
						connected directly to the structure to be protected by either welding or
						mechanical connection of lead wires.
Galvanic systems are generally limited to those tank
						components that are well coated with a dielectric material (sti-P3 tanks or
						fusion bonded epoxy coated steel piping) because the available current output
						of these systems is low. Attempts to protect long runs of uncoated piping or
						uncoated tanks generally is not practical because the useful life of the anodes
						is too short or the number of anodes needed is too great.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-3 - TYPES OF CATHODIC PROTECTION › Section 11-5-2-280.1-3-3.3 - Impressed Current Systems

Current through June 25, 2024
Impressed current systems are sometimes called rectifier
						systems because they utilize a device (a rectifier) to convert an external AC
						power source to the required DC power source. In this type of system, anodes
						are installed in the soil around the structure to be protected and the DC power
						is supplied to the anodes through buried wires. The power to the rectifier
						cannot be interrupted except when conducting maintenance or testing activities.
						Normally, a dedicated and protected circuit is provided for the impressed
						current system so that the power cannot be inadvertently cut off.
In impressed current systems the protected structure is
						bonded to the DC power system to complete the electrical circuit. It is
						critical that the anodes are connected to the positive terminal and the
						protected structure to the negative terminal of the rectifier. Reversal of the
						lead wires will make the components of the tank system anodic and can cause a
						rapid failure of the tank system due to corrosion. In addition, it is critical
						that all wire connections and splices are well insulated. Any breaks in the
						wiring insulation will allow current to leave the wire at that point and a
						rapid failure of the wire can occur due to corrosion.
Impressed current systems are generally installed on
						those tank systems that were installed prior to the effective date of the UST
						regulations since these tanks usually do not have a good dielectric coating.
						The level of cathodic protection provided by an impressed current system can be
						adjusted since the voltage produced by the rectifier can be changed. Because
						conditions that affect the level of cathodic protection needed are likely to
						change over time, adjustment of the rectifier is frequently
						necessary.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.1 - Galvanic Systems

Current through June 25, 2024
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.1.1 - sti-P3®Tanks

Current through June 25, 2024
Anyone who is a MDEQ certified UST installer may repair
						the cathodic protection system of a sti-P3 tank provided any provisions the
						tank manufacturer may have are also met. The design requirements for the
						installation of additional sacrificial anodes to a sti-P3 tank may be met
						without the need for a corrosion expert to design such, provided the provisions
						of the Steel Tank Institute "Recommended Practice for the Installation of
						Supplemental Anodes for sti-P3 UST's R-972-01" are followed. An evaluation of
						the cathodic protection system must be conducted within six months of the
						installation/repair in accordance with the requirements of this
						document.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.1.2 - Factory Coated Metallic Piping

Current through June 25, 2024
Installation of sacrificial anodes to factory coated
						(fusion bonded epoxy) metallic piping may be accomplished without the design of
						a corrosion expert provided the provisions of the Steel Tank Institute
						"Recommended Practice for Corrosion Protection of Underground Piping Networks
						Associated with Liquid Storage and Dispensing Systems R892-91" are followed. As
						an alternative, the practices as described in the Petroleum Equipment Institute
						"RP 100-2000 Recommended Practices for the Installation of Underground Liquid
						Storage Systems" may also be followed when installing sacrificial anodes on
						factory coated piping.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.1.3 - Non-factory Coated Metallic Piping

Current through June 25, 2024
The installation and/or repair of a galvanic cathodic
						protection system installed on metallic piping that is not factory coated with
						a dielectric material may be accomplished by anyone who is a MDEQ certified UST
						installer. However, the design of the galvanic cathodic protection system must
						be accomplished by a corrosion expert. In addition, an evaluation of the
						cathodic protection system must be conducted within six months of the
						installation/repair in accordance with the requirements of this
						document.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.2 - Impressed Current Systems

Current through June 25, 2024
Anyone who is a MDEQ certified UST installer may install
						and/or repair an impressed current cathodic protection system. However, the
						design of an impressed current system must be accomplished by a corrosion
						expert. If the repair of an impressed current cathodic protection system
						results in the reconfiguration of any of the components of the system, then the
						reconfiguration must also be designed by a corrosion expert.
If the repair only involves the replacement of existing
						components, a corrosion expert does not need to "sign-off on such work.
						However, after any repair/alteration of the impressed current system is made,
						an evaluation of the cathodic protection survey must be conducted within six
						months of the repair. If the repair/alteration results in any of the conditions
						found in Section 7.2 of this document being met, the cathodic protection survey
						must be conducted/evaluated by a corrosion expert.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5 - INSTALLATION/REPAIR OF CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-5-5.2.1 - Rectifier Adjustment

Current through June 25, 2024
Anyone who is considered qualified as a cathodic
						protection tester may adjust the rectifier output/voltage of an impressed
						current cathodic protection system. An evaluation of the cathodic protection
						system must be conducted whenever an adjustment to the rectifier is made.
						Before making any adjustments to the rectifier, the power must be turned off.
						Open both the AC and the DC circuit breakers.
It should be recognized that increasing the rectifier
						output could cause an increase in the potential for stray current to be
						generated that may have a detrimental effect on other buried metallic
						structures at the facility. Excessive rectifier output can also significantly
						shorten the life of the anode ground bed since the anodes will be consumed more
						quickly than necessary. In addition, care should also be taken to ensure that
						components of the rectifier do not become overheated (causing a potential fire
						hazard) as a result of increasing the output.
When evaluating the operation and output of a rectifier,
						it is important to make all measurements with a good quality multimeter. Do not
						rely on the output indicated by the voltmeter and/or ammeter that may be
						installed on the rectifier. Most rectifier gauges are adjustable and you should
						make any adjustment that may be indicated by measurement with the portable
						multimeter.
The gauges that are commonly built into rectifiers are
						usually not accurate and may even be frozen in a fixed position. If the
						indicator needle is frozen on the rectifier voltmeter/ammeter and cannot be
						freed, you should replace the gauge. If replacement is not accomplished, you
						should note that the gauge is not functioning so that an observer will be able
						to discern that the gauge is inoperable.
For the reasons given above and other considerations, a
						person qualified as a corrosion expert should be consulted whenever the output
						is adjusted or repairs are made to the rectifier.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.1 - Equipment › Section 11-5-2-280.1-6.1.3 - Lead Wires/Test Probes/Miscellaneous

Current through June 25, 2024
You should ensure that the insulation material of any
						  lead wires is in good condition. Any clips or probes used to make contact with
						  the structure to be tested must be clean and free of corrosion. A spool of
						  suitable wire of sufficient length is necessary to conduct continuity and/or
						  "remote earth" testing. It is usually necessary to have a probe that can be
						  attached to the end of a tank gauging stick in order to contact the tank bottom
						  since it is not uncommon for the test lead on sti-P3 tanks to either be missing
						  or discontinuous with the tank shell. A pair of locking pliers can sometimes be
						  useful when attempting to get a solid connection.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.7 - Continuity Testing › Section 11-5-2-280.1-6.7.1 - Continuity Testing of Galvanic Systems

Current through June 25, 2024
In order for sacrificial anodes to function
						  efficiently, the protected component must be electrically isolated from any
						  other metallic structures that may be connected to or in contact with the
						  protected structure. This is generally accomplished through the use of
						  dielectric bushings and unions and by making sure that no additional metallic
						  structures come into contact with the protected structure.
On those systems where adequate cathodic protection has
						  not been achieved, it is common to find that some unintended metallic structure
						  is electrically continuous with the protected structure. Frequently, an
						  electrical conduit is in contact with a sti-P3 tank or the tank bung nylon
						  bushings are missing or damaged. If metallic tank hold down straps were
						  improperly installed, they will wear through the epoxy coating on the tank over
						  time and cause premature anode failure. With metallic piping, the shear valve
						  anchoring bracket usually provides an electrical bond with the dispenser
						  cabinet and all of the other metal connected to it. When this is the case, the
						  anodes are trying to protect much more metal than intended and the life of the
						  anodes is shortened.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.7 - Continuity Testing › Section 11-5-2-280.1-6.7.2 - Continuity Testing of Impressed Current Systems

Current through June 25, 2024
All protected components of the UST system must be
						  electrically continuous in an impressed current cathodic protection system.
						  Various bonds may be required in order to ensure that continuity has been
						  provided. Failure to establish continuity in an impressed current system can
						  result in accelerated corrosion of the electrically isolated components.
Carefully check all bonds when evaluating an impressed
						  current system as these are of critical importance. Commonly, tanks are bonded
						  into the negative circuit by attachment to the tank vent lines above ground.
						  Because of this, it is easy for the integrity of the bonds to be compromised.
						  It is equally important to ensure that the positive lead wire(s) have
						  continuity. Any break in the insulation or dielectric coating of the positive
						  circuit will allow current to discharge from the break and cause rapid
						  corrosion failure of the wire. This is why it is absolutely critical that all
						  buried positive circuit splices are properly coated and
						  insulated.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.8 - Reference Electrode Placement › Section 11-5-2-280.1-6.8.1 - General

Current through June 25, 2024
Where you place the reference electrode when taking
						  structure-to-soil potential measurements is of critical importance. It is also
						  essential that the exact location of the reference electrode placement is
						  documented so that anyone could come back at a later date and reasonably
						  duplicate the test. Reference electrode placement must be indicated by both
						  written description and visually shown on a drawing of the tank system. The
						  forms in Appendix K and L of this guidance document provide for both written
						  and visual description of reference electrode placement.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.8 - Reference Electrode Placement › Section 11-5-2-280.1-6.8.2 - Local Placement

Current through June 25, 2024
Placement of the reference electrode is considered
						  local when it is in the soil directly over the structure that is being tested.
						  As discussed in Section
						  6.3, consideration of any effect active
						  anodes have (raised earth) must be considered when selecting the appropriate
						  location for local placement.
In addition, shielding of the reference electrode by
						  other buried metallic components may also need to be considered. For instance,
						  it is necessary to ensure that the tip of the reference electrode is below the
						  metallic skirting found on most man ways. If the tip of the reference electrode
						  is not below the metal skirt, it may be shielded from "seeing" the cathodic
						  protection current.
Ideally, the tip of the reference electrode should be
						  as close to the structure-to-soil interface as is practical in order to
						  minimize the voltage drop present in the soil due to resistivity. In practice,
						  about 6 inches of soil between the tip of the reference electrode and the
						  structure being tested works well.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.8 - Reference Electrode Placement › Section 11-5-2-280.1-6.8.4 - Galvanic Placement

Current through June 25, 2024
All galvanic cathodic protection systems must be tested
						  with the reference electrode placed both local and remote. In order to pass the
						  structure-to-soil survey, both the local and the remote potentials must
						  indicate that adequate cathodic protection has been provided. If neither the
						  local or the remote potential satisfies one of the cathodic protection
						  criteria, the structure fails the test. If one of the potentials indicates
						  adequate cathodic protection but the other does not, the result of the test is
						  inconclusive. If the test result is inconclusive, repairs must be made or a
						  corrosion expert must evaluate the data and/or conduct further testing to
						  declare either pass or fail.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.8 - Reference Electrode Placement › Section 11-5-2-280.1-6.8.5 - Impressed Current Placement

Current through June 25, 2024
Impressed current cathodic protection systems are only
						  required to be tested with the reference electrode placed locally. In order to
						  pass the survey, the potential obtained with the reference electrode placed
						  locally must satisfy either the 850 off or the 100 mV polarization criteria.
						  While only one test point is required, the tester should obtain structure to
						  soil potentials from as manysoil access points along the structure as is
						  practical. If any of the potentials indicate that adequate cathodic protection
						  has not been provided, the structure should be failed. Although not required by
						  this guidance, it may be useful to place the reference electrode remotely when
						  testing an impressed current system. The remote potential may provide
						  additional information by which to evaluate the cathodic protection system.
						  However, the structure may not be passed based on the remote potential itself.
						  In all circumstances, the potential obtained with the reference electrode
						  placed locally must indicate that adequate cathodic protection has been
						  provided.
Additionally, special circumstances may require that a
						  remote potential be obtained when testing impressed current systems. For
						  instance, if there are active sacrificial anodes buried in close proximity to
						  the structure being tested, the local potential may be influenced by raised
						  earth. The voltage drop caused by the sacrificial anodes would preclude the
						  accurate measurement of the local structure-to-soil potential. If it is known
						  that sacrificial anodes are impacting the potentials obtained locally, remote
						  potentials must be obtained.
The remote potential obtained under these special
						  circumstances must meet either the 850 off or the 100 mV polarization criteria
						  in order for the tested structure to pass the survey. An explanation must be
						  given in the "comments" of Section XVI of the MDEQ impressed current cathodic
						  protection evaluation form as to why the remote potential must be considered.
						  The remote potentials should be indicated on the form by designating remote in
						  the location code column of Section XVI.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.9 - Soil Access

Current through June 25, 2024
All structure-to-soil potentials that are intended to
						satisfy one of the three acceptable criteria found in Section
						6.2 must be obtained with the reference
						electrode placed in the soil. Therefore, the person conducting the evaluation
						must either confirm that soil access is available or make prior arrangements
						with the owner of the UST system to secure access.
Under no circumstances is it allowable to place the
						reference electrode on concrete, asphalt, or any other paving material to
						achieve satisfactory structure-to-soil potentials. Likewise, the practice of
						placing the reference electrode on a crack or expansion joint of a concrete or
						asphalt paving is not recognized as an acceptable method of obtaining
						satisfactory structure-to-soil potentials.
Placement of the reference electrode in an observation
						(monitoring) well to obtain a passing reading is also not allowed. While it may
						be useful to obtain data by placing the reference electrode on a crack in the
						pavement or in an observation well, the structure-to-soil potentials obtained
						by such placement are not in themselves acceptable to demonstrate adequate
						cathodic protection.
Access may be provided by drilling holes through the
						pavement or the installation of proper cathodic protection test stations. A
						practical way to provide soil access is to drill a V-i inch diameter hole in
						the pavement so that a "pencil" type reference electrode (3/8 inch diameter)
						can be inserted through the pavement and into the soil. Upon completion of the
						survey, the hole should be filled with a fuel resistant caulking material so
						that easy access can be provided at a later date. As an alternative, a two inch
						hole could be drilled to allow use of a standard reference electrode. A short
						length of PVC pipe could be epoxied in the hole and plugged with a threaded
						cap. Various cathodic protection test stations/man ways are available for
						installation. Whenever, a new tank system is installed or the pavement is
						reworked around an existing system, provisions for access to the soil must be
						made so that adequate cathodic protection testing may be
						accomplished.
Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.10 - Cathodic Protection Test Locations › Section 11-5-2-280.1-6.10.1 - Galvanically Protected (sti-P3*) Tanks

Current through June 25, 2024
The measurement of both local and remote
						  structure-to-soil potentials is necessary when evaluating sti-P3 tanks. The
						  appropriate location to place the reference electrode locally would be in the
						  soil at the middle of the tank (see Figure 3). However, if access to the soil
						  is not available at the middle of the tank, the reference electrode may be
						  placed at any point along the centerline of the tank but not directly over the
						  anodes at each end of the tank.
Caution should be exercised to ensure that there are no
						  sacrificial anodes installed in the soil around the submersible pump manway to
						  protect any steel piping that may be associated with the tank. If anodes are
						  installed at the pump manway, the reference electrode must be placed in the
						  soil near the opposite end of the tank.
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In addition to the local potential described above, a
						  remote potential must also be obtained. Remote generally means the reference
						  electrode is placed in the soil at least 25 feet away and not more than 100
						  feet away from the tank you are measuring (See Figure 4). Refer to Section
						  6.8.3 for a more complete discussion of remote reference electrode placement.
						  Care must be taken that the remote location is not in proximity to any other
						  cathodically protected structure (e.g. natural gas lines) or directly over any
						  other kind of buried metallic structure. The remote placement should be such
						  that the reference electrode is aligned with the longitudinal axis of the tanks
						  and can "see" the anodes. This orientation is desirable in order to prevent
						  shielding.
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Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.10 - Cathodic Protection Test Locations › Section 11-5-2-280.1-6.10.2 - Galvanically Protected Metallic Piping

Current through June 25, 2024
Both local and remote potentials are required on all
						  galvanically protected metallic piping. When metallic piping is protected by
						  sacrificial anodes, several different possibilities exist as to where would be
						  the appropriate location to place the reference electrode to obtain local
						  potentials. Knowing where the anodes that are protecting the piping are
						  installed is of critical importance. When obtaining local potentials, the
						  reference electrode must be placed in the soil directly over the pipe to be
						  evaluated at a point that is the most distant from any anode that may be along
						  the pipe.
Because it is a common practice to bury piping anodes
						  at the submersible pump manway of a tank, the appropriate location to place the
						  reference electrode to obtain local potentials is at the dispensers (See Figure
						  5). Remote placement of the reference electrode is also necessary.
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When the piping anodes are installed at the dispensers,
						  the appropriate local reference electrode placement would be at the piping
						  nearest the tanks (usually the submersible turbine pump manway) as shown in
						  Figure 6. Remote placement of the reference electrode is also necessary.
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When the piping anodes are located at both the tanks
						  and the dispensers, the reference electrode must be placed at the approximate
						  center of the piping run to obtain local potentials (See Figure 7). Remote
						  placement of the reference electrode is also necessary.
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When the anodes are installed at the center of the
						  piping, or it is not known where the anodes are installed, the reference
						  electrode must be placed at both the tank and the dispenser end of the piping
						  to obtain local potentials (See Figure 8). Remote placement of the reference
						  electrode is also necessary.
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Mississippi Administrative Code › Title 11 - Mississippi Department of Environmental Quality › Part 5 - Underground Storage Tank Regulations › Chapter 2 - Mississippi Commission on Environmental Quality Underground Storage Tanks Regulations Technical Standards and Corrective Action Requirements for Owners and Operators of Underground Storage Tanks (UST) (Adopted March 22, 1989; Amended August 25, 2011, Last Amended August 23, 2018) › Appendix 11-5-2-280.1 - GUIDELINES FOR THE EVALUATION OF UNDERGROUND STORAGE TANK CATHODIC PROTECTION SYSTEMS › Section 11-5-2-280.1-6 - CATHODIC PROTECTION TESTING › Section 11-5-2-280.1-6.10 - Cathodic Protection Test Locations › Section 11-5-2-280.1-6.10.4 - Piping Protected by Impressed Current

Current through June 25, 2024
With impressed current cathodic protection systems,
						  pipe potentials are required to be measured with the reference electrode placed
						  locally. Just as with any other type of cathodic protection system, knowing
						  where the anodes that are protecting the piping are installed is of critical
						  importance. Due to the high degree of variability that exists in anode
						  placement and piping configurations, structure-to-soil potentials must be
						  obtained by placing the reference electrode at both the tank and dispenser end
						  of any piping that is protected by impressed current (See Figure 11).
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