Louisiana Tank Regulations: Permits, Training & Reporting

Louisiana tank regulations require anyone storing petroleum or hazardous substances to register their tanks with the Louisiana Department of Environmental Quality (LDEQ), meet design and leak-detection standards that differ by tank type, keep trained operators on site, report releases and chemical inventories on set deadlines, carry financial assurance, and follow a supervised closure process at the end of the tank’s life. The specific rules depend on whether the tank is above or below ground and what it holds, and getting the category wrong is the first mistake owners make.

Which Rules Apply to Your Tank

Louisiana sorts storage tanks into three regulatory lanes, and each carries its own permitting, monitoring, and closure requirements.

Aboveground storage tanks (ASTs) fall under LAC Title 33, Part IX, which requires secondary containment (dikes or double walls), periodic inspections, and leak detection.1Louisiana Department of Environmental Quality. Louisiana Administrative Code Title 33 Part IX – Water Quality Federal Spill Prevention, Control, and Countermeasure (SPCC) rules under 40 CFR Part 112 kick in when aggregate aboveground oil capacity exceeds 1,320 gallons across all containers of 55 gallons or more at the facility. That is a facility-wide total, not a per-tank number, so a 500-gallon diesel tank sitting alongside a 1,000-gallon waste oil tank puts the site over the threshold.2eCFR. 40 CFR 112.1 – General Applicability Louisiana mirrors the 1,320-gallon aggregate for oil; for other hazardous liquids, the threshold is 1,320 gallons in a common storage area or 660 gallons in a single container.

Underground storage tanks (USTs) are regulated under LAC 33:XI, which implements 40 CFR Part 280. A tank counts as underground if 10 percent or more of it sits below the surface.3eCFR. 40 CFR 280.12 – Definitions Farm and residential tanks of 1,100 gallons or less used for noncommercial motor fuel are excluded from the federal program.

Hazardous waste tanks fall under LAC 33:V, Louisiana’s version of RCRA. An important boundary: an underground tank holding hazardous waste is not a UST for regulatory purposes. It is excluded from LAC 33:XI and sits entirely under the hazardous waste framework in LAC 33:V, with separate permitting, inspection, and closure rules.4Legal Information Institute. Louisiana Administrative Code tit 33, XI-101 – Applicability Hazardous waste tank facilities must submit design plans, geological data, and engineering reports demonstrating no risk to water, air, or health, and may need separate air permits if they emit volatile organics.5Justia. Louisiana Revised Statutes RS 30-2192 – Treatment, Storage, and Disposal Facilities

Registration, Fees, and Permits

Every UST owner must register with the LDEQ and pay $60 per tank per year.6Legal Information Institute. Louisiana Administrative Code tit 33, XI-307 – Fee Schedule On top of the base fee, additional annual monitoring and maintenance fees apply to certain categories:

Permits should be in place before any tank goes into the ground or onto a pad. Petroleum USTs are permitted under LAC 33:XI; hazardous waste tanks follow the separate process in LAC 33:V. Once active, permits carry ongoing obligations, including a current SPCC plan for facilities over the 1,320-gallon aggregate.2eCFR. 40 CFR 112.1 – General Applicability Letting a permit lapse or missing a renewal can trigger enforcement action, including operational suspension. Siting also matters: tanks in Louisiana’s designated coastal zone may need a Coastal Use Permit from the Louisiana Department of Natural Resources, and wetlands or floodplains can add federal permits from the Army Corps of Engineers.8Louisiana Department of Natural Resources. Applying for a Coastal Use Permit

Operator Training

Every UST facility in Louisiana must have trained operators in three roles, and the training deadlines are tight.

  • Class A operators are the tank owner or a designated representative with primary responsibility for regulatory compliance across the operation. Training must be completed within 30 days of taking on the role.
  • Class B operators handle day-to-day operation and maintenance of the UST system at the facility. This can be an employee or a third-party contractor. Training must also be completed within 30 days of assuming duties.
  • Class C operators are on-site staff, such as fueling attendants, responsible for responding to spills or releases. They must be trained before working unsupervised.9Louisiana Department of Environmental Quality. LDEQ UST Operator Training Program Fact Sheet

The distinction between Class B and Class C is practical. The Class B operator sets up and maintains compliance procedures; the Class C operator is the person physically present who needs to know what to do when something goes wrong. Many small gas station owners serve as their own Class A and Class B operators, but they still need a trained Class C employee on site during business hours.

Leak Detection and Release Reporting

UST owners must install corrosion protection, spill and overfill prevention equipment, and release detection systems. When a suspected release is discovered, the owner has 24 hours to notify the LDEQ and must then follow the corrective action procedures in LAC 33:XI.10Legal Information Institute. Louisiana Administrative Code tit 33, XI-707 – Reporting of Suspected Releases That 24-hour window is short, and missing it turns a manageable event into an enforcement matter.

Tier II Chemical Inventory Reporting

Facilities that store hazardous chemicals above threshold quantities must file annual Tier II inventory reports under the federal Emergency Planning and Community Right-to-Know Act. Any chemical requiring a Safety Data Sheet counts, which sweeps in substances tank owners might not think of as “hazardous.”

The reporting thresholds are:

  • Extremely hazardous substances such as ammonia, chlorine, formaldehyde, and sulfuric acid: 500 pounds or the threshold planning quantity, whichever is lower.
  • All other hazardous chemicals: 10,000 pounds.
  • Retail gasoline: 75,000 gallons across all grades.
  • Retail diesel fuel: 100,000 gallons across all grades.

If your facility held any of these at or above the threshold at any point during the previous calendar year, a Tier II form is due by March 1. The report goes to the State Emergency Response Commission, the Local Emergency Planning Committee, and the fire department with jurisdiction over your site.11eCFR. 40 CFR Part 370 – Hazardous Chemical Reporting Those agencies can also request Tier II information at any time, even below the threshold, and you have 30 days to respond. A busy gas station or a fleet yard with a few large diesel tanks can easily cross the retail fuel line without realizing it.

Financial Responsibility and the Trust Fund

Federal rules require petroleum UST owners to carry financial assurance for corrective action and third-party bodily injury or property damage claims. The per-occurrence minimums are:

  • $1 million for petroleum marketing facilities or any operation handling more than 10,000 gallons per month.
  • $500,000 for all other petroleum UST owners.

Annual aggregate requirements are $1 million for owners of 1 to 100 tanks and $2 million for owners of 101 or more tanks.12GovInfo. 40 CFR 280.93 – Amount and Scope of Required Financial Responsibility Acceptable mechanisms include commercial liability insurance, surety bonds, letters of credit, trust funds, or a combination.

Louisiana also runs the Motor Fuels Underground Storage Tank Trust Fund (MFUSTTF) under RS 30:2195, funded partly through tank registration fees.13Louisiana State Legislature. Louisiana RS 30-2195 – Motor Fuels Underground Storage Tank Trust Dedicated Fund Account The fund can spend up to $2,000,000 per occurrence on approved investigation, testing, containment, and cleanup costs for participating tank owners, including third-party claims arising from motor fuel releases. Participants must meet financial responsibility requirements set annually by the LDEQ secretary and an advisory board.14Legal Information Institute. Louisiana Administrative Code tit 33, XI-1121 – Use of the Motor Fuels Underground Storage Tank Trust Fund Eligibility is not automatic. Owners who fail to register tanks, keep up with compliance, or pay required fees can lose access to the fund at the moment they need it. The fund also covers abandoned tanks: the LDEQ secretary can declare a tank abandoned when no financially responsible owner can be found, and the fund can pay for closure and remediation.

Penalties

The LDEQ conducts both routine and unannounced inspections, and any deficiency must be corrected within a specified timeframe. Civil penalties under the Louisiana Environmental Quality Act can reach $25,000 per day per violation. UST-specific violations carry their own penalty structure under RS 30:2194. If a leak causes contamination, the responsible party will typically fund the remediation, which can include soil excavation, groundwater treatment, and long-term monitoring, and those costs routinely run into six figures.

Falsifying compliance records or willfully ignoring known contamination can escalate matters from civil to criminal prosecution. Even for non-willful violations, the daily-fine structure means a small problem left alone becomes an expensive one fast. A tank owner who ignores an inspection deficiency for 30 days can face penalties that dwarf the cost of the fix.

Closing a Tank

Louisiana requires a formal, LDEQ-supervised closure when a tank reaches the end of its useful life. Cutting corners here is one of the most common sources of long-term liability, because contamination from an improperly closed tank can surface years later as a cleanup obligation that follows the property.

For USTs, the owner must notify the LDEQ at least 30 days before permanent closure begins.15eCFR. 40 CFR 280.71 – Permanent Closure and Changes-in-Service The tank must be emptied, cleaned, and either physically removed or filled with an inert material such as sand or concrete slurry. Professional removal and disposal of a single UST typically runs between $1,500 and $3,000, depending on tank size, contents, and site conditions.

Every UST closure requires soil sampling, evaluated against the LDEQ’s Risk Evaluation/Corrective Action Program (RECAP) screening standards. If any analyzed constituent exceeds the Limiting Soil Standard in RECAP Appendix M, Column A, or if free-phase product is found during closure, the owner or closure contractor must notify the LDEQ’s single point of contact. That initial notification is required even if follow-up analysis shows concentrations below concern.16Louisiana Department of Environmental Quality. UST Closure Guidance Contamination above RECAP thresholds triggers corrective action that can significantly delay final closure approval.

AST decommissioning involves draining the tank, removing residual product, and dismantling the structure, with degassing required before any cutting or welding on tanks that held flammable or toxic substances. If tank components or residual waste qualify as hazardous waste, disposal must go through a licensed facility under an appropriate permit. Property buyers routinely require environmental site assessments, and an improperly closed tank found during due diligence can kill a sale or shift substantial cleanup costs onto the current owner.