Abandoning Commercial & Residential Underground or Above Ground Oil Storage Tanks (UST): Procedures & Regulations InspectAPedia®  -     How to abandon a buried oil tank in place Oil tank abandonment regulations How to avoid cave-ins at abandoned oil tanks How old heating oil is removed from abandoned oil tanks How to use up the heating oil in an oil tank before abandoning or removing it.

This document explains how to properly "abandon" or close an underground petroleum storage tank in place, that is, without having to excavate and remove it. This procedure is permitted if tests show that the tank has not leaked, and it can save a significant amount of the cost of oil tank removal and site repair to fill in the hole left behind.

Proper oil storage tank abandonment requires the use of good engineering practices, including consideration of the future condition of the tank. While the original of this article focused on commercial oil storage tanks, the concerns and steps should be examined by those abandoning residential oil tanks as well. Readers of this page should see The Oil Storage Tank Website.

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ABANDONMENT REGULATIONS - Oil Tank Regulations: for Underground Oil Storage Tanks and Aboveground Tanks

In Brief: oil storage tanks which have not leaked can be abandoned by removal or by filling in-place. Oil tank leaks must be reported to the proper authorities.

The US EPA has this succinct advice about abandoning oil tanks:

1. Notify the regulatory authority at least 30 days before you close your UST.
2. Determine if contamination from your UST (underground storage tank) is present in the surrounding environment. If there is contamination, you may have to take corrective action. For at least 3 years, keep a record of the actions you take to determine if contamination is present at the site (or you can mail this record to your regulatory authority).
3. Either remove the UST from the ground or leave it in the ground. In both cases, the tank must be emptied and cleaned by removing all liquids, dangerous vapor levels, and accumulated sludge. These potentially very hazardous actions need to be carried out carefully by trained professionals who follow standard safety practices. If you leave the UST in the ground, have it filled with a harmless, chemically inactive solid, like sand.

(The US EPA also provides more detailed oil storage tank abandonment guidelines for both temporary and permanent abandonment of oil tanks.)

Abandoning a leaky oil tank? In New York abandoning an oil storage tank includes contacting the NYS DEC within two hours of leak discovery. Oil leaks require special cleaning and testing. Significant costs can be involved. Buyers of buildings with buried tanks should either obtain good documentation regarding tank abandonment (and any leak tests performed) or if no documentation is available, testing for leaks is very strongly advised. See OIL TANK LEAK ADVICE

In other U.S. states and Canadian provinces similar regulations apply in almost all jurisdictions.

Due to the corrosive properties of the soil environment, any steel tank left in the ground will eventually corrode and collapse. See OIL TANK FAILURE RATES and also see OIL TANK FAILURE CAUSES. For this reason, storage tanks which are no longer to be used must be properly "abandoned" or "discontinued."

Abandon an oil tank without removal: Abandonment of an oil tank does not itself require that a tank be removed. If a tank has not leaked, thus is there is not a soil contamination issued, it can be opened, cleaned, inspected, and filled in-place. Actual removal of a buried tank involves the additional expense of excavation to remove the tank and then having to fill-in the hole.

Home inspectors in states or provinces where oil-fired heating equipment is used may often find indications that an old tank has been "abandoned" at the property either because of a switch to an alternative fuel or because an old leaking tank was supplanted by a new one. Safety and environmental concerns mean that an improperly abandoned tank may become a significant future cost to the homeowner.

Portions of this article are from the first half of a New York DEC article printed in the NYSBOC Building Log newsletter in 1992. While most of the present tank regulations exclude the mere presence of residential heating oil storage tanks under 1100 gallons from having to be reported, inspectors should watch for changes: increasing public concern is leading to increased regulation of residential tanks. Original author - Russ Brauksieck. Extensive edits & additions: D J Friedman.

Many localities across the country are allowing underground petroleum tanks to be filled with water if the tank is to be closed in-place. This is not a good engineering practice because the water will accelerate the ultimate corrosion of the tank. Subsequently, the water, now contaminated by the residues in the tank, will escape to the soil and eventually contaminate the ground water.

Note: Long Island NY requires that residential heating oil tanks be registered with the State Department of Environmental Conservation. (C)Trap DJ Friedman

In addition, the tank, now empty, is likely to cave-in along with the ground around it. The need to require that good engineering practices be used in underground storage tanks has prompted the development of much legislation across the country. Abandoned buried storage tank cave-in prevention is discussed in the next section of this article.

Note: Regulations for proper closure of underground petroleum storage tanks in New York State [and almost certainly in other oil-using states as well] have been promulgated by the NYS Uniform Fire Prevention and Building Code (UFPBC), the U.S. EPA, the NYS Department of Environmental Conservation (DEC).

When the Oil Tank must be emptied: Also see NFPA 31, section 2-8 which provides "If a tank and its related piping is abandoned for whatever reason, the tank and all piping connected to it, including the outside fill and vent piping and any piping connected to the appliance, shall be emptied of all contents, cleaned, removed from the premises or property, and disposed of in accordance with all applicable local, state, and federal rules and regulations."

Other New York oil storage tank regulations include the following:

• New York State Fire Code: 3404.2.13.1 (old NY CRR 1164.5) requires that an oil tank which is no longer going to be used (a discontinued oil storage tank) shall be opened, cleaned, and abandoned (filled in-place or removed) within ninety days of the day on which it is no longer used. Piping is also removed (Avoid accidental filling of empty abandoned tanks or leaks from pipes no longer connected to tanks!).
• 1164.5 of the UFPBC, in section 40
• CFR part 280.7 of the federal Underground Storage Tank (UST) regulations
• subdivision 6 NYCRR Part 613.9 (b) of the DEC's Petroleum Bulk Storage (PBS) regulations.
• Other states using significant amounts of oil for residential heating may have similar regulations. See TANK REGULATIONS.

Regulations addressing reporting of oil tank leaks and oil tank abandonment of oil tanks written various state and federal authorities are discussed in more detail at OIL TANK REGULATIONS - "Buried Tank and Above Ground Oil Tank Leak Reporting & Tank Abandonment Regulations"

AVOIDING Oil Storage Tank CAVE-INs When Abandoning Oil Tanks

In order to avoid cave-ins, all of these regulations require that tanks either be removed or filled in-place with a solid, inert material, using good engineering practices.

Such fill material is also required to prevent the tank from surfacing after closure, should the ground water table rise, and to completely seal the tank and associated piping from future use as a tank system.

Acceptable solid, inert materials for closing a tank include sand, concrete slurry, and even some foams. When the tank eventually corrodes and collapses, this solid material inside the tank will keep the ground from caving in.

Removing old fuel from underground oil tanks

The UFPBC also requires that underground petroleum tanks to be closed in-place shall be made safe by removing flammable or combustible liquids from the tank and connecting lines; disconnecting the suction inlet, gauge and vent lines; and capping the remaining piping.

All storage tanks removed from their location must also have flammable or combustible liquids removed, have the same lines disconnected; have sections of connecting lines not to be used further removed, and have inlets, outlets, and any leaks capped or plugged. The basic procedures for meeting these requirements are defined in the State and federal regulatory programs.

In addition to requiring the same basic procedures as the State regulations, the federal UST regulations require that a site assessment be performed by the owner/operator when a tank is closed. (Heating oil tanks, and farm and residential tanks storing less than 1,100 gallons of motor fuel are exempt from these regulations.)

See INDOOR OIL TANK ABANDONMENT for some suggestions for using up heating oil or removing it from an oil tank to be abandoned.

For a detailed description of the steps required for proper tank abandonment or for more information on site assessments and permanent tank closure, contact your state department of environmental conservation. In New York inspectors can contact the author or the Bulk-Storage help-line 800-242-3451.

How to Use Up Heating Oil Before Removing or Replacing an Oil Tank

Oil to Gas Heat Conversion Advice - using up heating oil fuel

If you are going to convert to gas or another heating source but you first want to use up the heating oil in your oil storage tank, and provided that your oil fired heating equipment (oil fired boiler, furnace, or water heater) is good operating condition, you can choose to simply let the old, to-be-abandoned oil fired equipment keep running until you run out of oil ... almost. There are a few problems to watch out for:

If your oil tank piping lines come off of the top of the oil tank and are properly installed the lines won't pick up the sludge, water, and last few inches of oil in the tank, so you'll probably be fine just running your oil fired equipment until you run out of oil.

If your oil tank piping lines come off of the bottom of the oil tank and you run it out there is the risk of pulling sludge and crud into the oil filter, oil burner, and losing heat if those components clog. If the oil burner shuts off in that manner, it'll indeed be shut off firmly until it's repaired, so don't try this if you're still depending on the oil heat to keep working (say to avoid freezing).

Your gas heat or other new source of heating should be hooked up and ready to run. Thus you can run the oil heat until it runs out or fails on clogging without risking leaving the building with no heat source - risking frozen pipes, water damage, mold contamination, etc.

The heating service technicians will not want to remove old oil-fired heating equipment until it is completely cold. That's because they don't want to deal with hot water, burns, etc.

The old oil tank may still need to be pumped out if there's oil remaining in it - lest you get a messy leak and spill later.

Chimney safety warning on heating fuel conversion from oil to gas

If you are converting fuel from oil to gas and intend to continue to use the same chimney that vented your oil fired heating equipment be sure to have the chimney cleaned and inspected for safety. The draft characteristics of these fuels differ, so chimney repairs or changes could be needed for safety.

Be SURE that the tank filler and vent are totally removed lest you get an un-wanted oil delivery. Don't laugh, it happens.

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OIL TANKS INSPECT LEAK TEST ABANDON REGS
  HOME BUYERS GUIDE TO OIL TANKS
ABANDONING OIL TANKS
ABOVE GROUND OIL TANK INSPECTIONS
BURIED OIL TANK ADVICE
BURIED OIL TANKS, FINDING
FLOATING UP OIL STORAGE or SEPTIC TANKS
FUEL OIL TYPES & CHARACTERISTICS
HEATING OIL SHELF LIFE
OIL TANK ABANDONING PROCEDURE
  INDOOR OIL TANK ABANDONMENT
  OUTDOOR TANK ABANDONMENT
  OIL TANK BANDONMENT REGULATIONS
    EPA OIL TANK ABANDONMENT GUIDE
    OIL TANK ABANDONMENT DETAILED STEPS
    OIL TANK LEAK PREVENTION GUIDE
    OIL TANK TEMPORARILY OUT OF USE
  AVOIDING CAVE-INs at OUTDOOR OIL TANKS
  REMOVING OLD FUEL FROM OIL TANKS
OIL TANK FAILURE CAUSES
OIL TANK FAILURE RATES
OIL TANK GAUGES
OIL TANK INSPECTION REPORTS
OIL TANK DEFECT INSPECTION
OIL TANK PIPING DEFECTS
OIL TANK LEGAL ISSUES
OIL TANK LEAK ADVICE
OIL TANK LIFE
OIL TANK PIPING DEFECTS
OIL TANK PRESSURE
OIL TANK REGULATIONS
OIL TANK REMOVAL COs
OIL TANK REMOVAL FINANCIAL AID
OIL TANK SAFETY
OIL TANK SLUDGE
OIL TANK STANDARDS
OIL TANK TESTING
OIL TANK TESTING COs
OIL TANK WATER CONTAMINATION

• Technical & Peer Reviewers for the original publication in the ASHI Technical Journal
  • Stephen Gladstone, Stonehollow Inspections, CT.,
  • Paul Ciminello, Ecosystems Strategies, Poughkeepsie, NY
  • Daniel Friedman, ASHI Technical Journal Editor/Publisher, Poughkeepsie, NY
  • Russ Brauksieck is an Environmental Engineer with the New York State Department of Environmental Conservation.
• US EPA "How do you Properly Close a UST?" is summarized at epa.gov/OUST/fsprevnt.htm. These details for temporary and permanent closing of underground oil storage tanks are provided by the US EPA as well.

Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair

• Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
• More Reading and advice about oil storage tank leak testing
  • ABOVE GROUND OIL TANK INSPECTIONS - "Visual Inspection of Above Ground Residential Heating Oil Storage Tanks - ASTs" provides photos of common and easily seen tank leaks and defects, and a description of some easy visual checks of the condition of a visible oil tank, things that you can do yourself
  • OIL TANK TESTING Oil Tank Testing Methods & Choices
  • BURIED OIL TANKS, FINDING How to Find Buried Oil Tank
  • OIL TANK FAILURE CAUSES Oil Tank Leaks or Oil Tank Failure Causes - oil tank leaks are caused by corrosion, damage, soil conditions, other factors
  • TANK FAILURE RATES Oil Tank Failure Rates - Oil Tank Leak Probability as a Function of Tank Age, Location, Condition, Soil Conditions and Other Factors
  • OIL TANK WATER CONTAMINATION - how to find out if there is problematic water in an oil tank and how to get water out of an oil tank are explained
• Oil Tanks - The Oil Storage Tank Information Website: Buried or Above Ground Oil Tank Inspection, Testing, Cleanup, Abandonment of Oil Tanks
• Abandon a Buried Oil Tank, How To - Abandoning Commercial Underground Tanks, Russ Brauksieck, ASHI Tech. Journal, Vol.3 No.1 Spring 1993, P. 40-41 [Reprint]
• Above Ground Oil Tanks: Visual Inspection of Oil Storage Tanks for evidence of leaks, damage, improper piping - photos and text
• Above Ground Oil Tanks Checklist, an Oil Company's advice
• Above Ground Tanks UL Standards, UL Tank Listing Standards, guidance for home owners, buyers, and inspectors
• Buried Oil Tanks - Finding How to Find Buried Oil Tanks and "Nearly Hidden" and Leaky Oil Tanks - photos and text.
• Buried Fuel tank - Advice - Buried FUEL Tank - GAS or OIL advice for home buyers, home owners, inspection report language for homes where a buried oil tank is or was installed
• Environmental Issues & Regulations for Oil Tanks, Registration, Abandonment, Leak Reporting
• Home Inspection Report Language Library: Buried Oil Tanks, Buried or aboveground oil tank advice for home buyers and home owners, where a buried oil tank is or was installed, also home inspection report language for oil tanks
• Home Inspection Report Language Library: Visible Defects in Oil Tank Installations, Tanks, and Heating Oil Piping
• Home Inspection Report Language Library: Gas Fuel Piping or Tank Faults Basic advice - home inspection report language suggestions
• Home Inspection Report Language Library: Oil Tanks text file list © Oil and Other Storage Tank Leaks, Testing, Abandonment, Inspection - UST home inspection report language files - Reference List
• Indoor Environment Website Indoor Building Environmental Hazard Detection, Testing, Repair, & Prevention - Main Web Page
• Leaky Heating Oil Tanks - Advice for Home Owners or Buyers: caused of leaks in oil tanks, oil tank testing alternatives, what to do about leaky tanks: D. J. Friedman, ASHI Tech. Journal, Vol.2 No.1, Winter, 1992 p. 42-43 Illus
• Leak or Failure Rates for Home Heating Oil Tanks
• Legal Issues Regarding Buried Oil Storage Tanks K. S. Rea, Attorney, summary from ASHI Chapter Seminar.
• Primer on Petroleum Bulk Storage Tanks & Petroleum Contamination of Property Paul H. Ciminello, ASHI Tech. Journal, Vol.3 No.1 Spring 1993, p 35-39
• Petroleum Bulk Storage J. Sibblies, NY State DEC, Advice to Home Owners and Home Inspectors about Oil Storage Tanks - summary from ASHI Chapter Seminar.
• Septic Tank inspection, testing, diagnosis, repair
• OIL TANK FAILURE CAUSES - Oil Tank Failure Causes - oil tank leaks are caused by corrosion, damage, soil conditions, other factors
• Tank Failure Rates - Oil Tank Failure Rates - Oil Tank Leak Probability as a Function of Tank Age, Location, Condition, Soil Conditions and Other Factors
• OIL TANK TESTING - - How Oil Tanks are Tested for Evidence Leaks, of Current or Previous Oil Spills
• "How do you choose the right tank testing method?", Cynthia Johnson, Fuel Oil & Oil Heat Magazine, November 1995
• National Association of Oil Heat Service Managers, PO Box 380, Elmwood Park, NJ 07407
• "Homeowners Guide to Fuel Storage," Agway Energy Products, Verbank, NY, November 1990
• Web Link Exchange: Contact Us to list your website or contact information for oil tank testing, tank corrosion research, oil industry experts
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