Earthquake Preparation Checklist

Formulation of an emergency plan is one of the most important undertakings that can be accomplished before a disaster ever happens. We have laid out different tiers of strategies for you and your family to consider and implement before a catastrophe strikes.

Laying down the foundation

One of the first steps is conceptualizing what you will need first.

Meeting Point

  • Where will you meet after a disaster?
  • At home, have a designated spot outside of the home where everyone meets.
  • If you and your partner are at work, where will and how will you meet-up?
  • If you have children, who will pick them up from school?
  • Do you have pets? What is the ideal way to bring them along?
  • If everyone is scattered apart, what is the long-term game plan of a final assembly place. Will it be the local school, police or fire department, your home?

After you have formulated meeting places, practice. The Red Cross suggest that you practice earthquake and fire drills twice a year using multiple escape routes. By coordinating the drills when you change your clocks, it becomes easier to remember and to be consistent with this life-saving technique.

Outside Resources

An out-of-state contact should be chosen and everyone in the home should have the number. After a disaster, local phone lines may be jammed or down, making a long-distance call may be easier. If all of your family members are scattered apart from each other, having that outside contact may be the vital life-line that your family needs to use to let everyone know that you each are safe.

Also, reaching out to neighbors for additional resources, may not only help you, but them as well. They may have important skills or items at their disposal which may come in extremely handy in a disaster. Also, would they be willing to look after a child until you could make it home, if you have pets, would they be able to assist them?

The State and Portland area Counties and Cities are each creating their own earthquake emergency outreach plan, please visit their websites for additional resources:

Preparing an Emergency Kit and Important Information Storage

After surviving a quake, you will still need to get through the next couple days, up to weeks and even months. Creating an essential survival kit with food, water and household items will allow you and your family the ability to carry through until vital services are up and running.

We’ve laid this out in different levels of what would be the most vital to survive through items that would make life easier when basic luxuries are not available.

Emergency Preparedness List                                First Aid Kit Supply List

Essential Family Records

Crucial paperwork containing contact information for your home, banking, medical and benefit institutions can be equally important when trying to rebuild after a disaster.  Make copies of all listed and store them in at least two safe places, even consider having an out-of-state relative keep copies for you.  Have a “go-box” that contains this crucial documentation and should be kept with or near the Main Home EssentialsEssential Family Documentation

Cascadia Subduction Zone

Cascadia Subduction Zone

According to the United States Geological Survey (USGS) the forces that produce earthquakes in western Oregon are generated as the Juan de Fuca oceanic plate moves northeastward with respect to the North American continental plate at an average rate of about 1.5 inches per year along the Pacific Northwest coast. At the zone of contact between the North America and Pacific Plates, the Juan de Fuca Plate slides beneath the North American continent and sinks slowly into the earth’s mantle, producing the Cascade volcanoes and earthquakes. The zone of the shallow, east-dipping subducting plate is called the Cascadia Megathrust Fault.

Cascadia Subduction Zone

Cascadia Subduction Zone – Juan de Fuca Triple Junctions and Cascade Volcanic Arc

Studies have shown through geological evidence provided by buried soil layers, dead trees, and tsunami deposits that about every 500-600 years the upper portion of the shallow dipping Cascadia Fault ruptures offshore and releases this compression and causes great earthquakes of magnitude 8 to 9. (The information provided for this section was from a very fascinating read from the USGS entitled Earthquake Hazards and Lifelines in the Interstate 5 Urban Corridor.)

The consequence of a Subduction Zone earthquake are the largest earthquakes in the world, with a result of a minimum 8.5 magnitude quake.  The last “big one” from the CSZ was in January 1700, the average times between quakes are less than 300 years apart.  Needless to say, we are overdue.

We can expect numerous situations during and after a large-scale earthquake:

  • The earthquake could last minutes, followed by equally large aftershocks and Tsunamis
  • Utilities
    • No power for at least a month
    • Full scale utility service restoration (power, gas, water, sewer, communications, etc.) could take 3 to 12 months, if not longer.
    • No clean water
    • No access to sanitation
    • Broken waterlines
    • Fires due to leaking gas lines
  • Damaged roads and bridges destroyed
  • Thousands dead
  • Tens of thousands injured
  • Tens of thousands homeless

Reading this can seem bleak, but if we prepare and educate ourselves on how to live through and survive a “megathrust” quake, our chances of survival with multiply.

We have created an earthquake preparation page with guides and checklists on how you can prepare for yourself and your family during and after a major earthquake.

Additional websites with information regarding the earthquakes in the Northwest and the Cascadia Subduction Zone:

Seismic Retrofit Common Questions

 Why should I retrofit my home? 

  • To reduce the damage to your home, lessen the potential for injury and the loss of sentimental and monetary valuables.
  • Without retrofitting your home, you will not be able to obtain earthquake insurance.  In the case of a major earthquake and your home is destroyed, without insurance, you are left with a mortgage payment and no house.
  • Most crucial is the ability to occupy your home for weeks, even if it is destroyed. To think of your home as a shelter after a disaster is vital, you could still remain in the house to stay dry and limit your exposure to the weather.

What size earthquake will this protect me against?

Retrofitting your home does not equal fortification of your structure. The main goal of retrofitting your home is to reduce your risk against major injuries, protection of material property and to give you and your family the resiliency to survive, by using your home as a shelter against the elements.

What does it mean to retrofit?

In the most basic of terms, it is the modification of an existing structure to make them more resistant to seismic activity. Retrofitting can help prevent the home from slipping off the foundation and/or collapsing.  Please see our videos below showing the difference between and unattached and an attached home and how retrofitting can protect your investment.

Unattached house video  Attached house video

What about my water heater and other utilities?

Hot water heaters should be strapped to a wall or post to protect people from a bursting water heater and reduce fire potential. The installation of natural gas shut-off valves can help prevent houses from catching fire from natural gas lines.

I have an older home, why should I be worried about my home in an earthquake?

The majority of older homes are built and sit on top of a foundation and are not attached to it. Unless your home is built on a concrete slab, it is highly likely that it is constructed on a raised foundation with a crawlspace or basement. This type of construction does not give your home the strength to hold up to a strong earthquake that produces powerful lateral and upward movements, it will literally be knocked off its foundation.

The purpose of retrofitting is to attach the home to the foundation and give it the stability that it needs to withstand a violent earthquake.

Please visit our Seismic Retrofit Attachments – Illustration and Photos page for a detailed view of completed seismic upgrades.

Cesspool Decommissioning

Cesspool Decommissioning Common Questions

What is a cesspool?

In the most basic terms a cesspool is a constructed underground vault for the disposal of liquid waste and sewage. Cesspools are made of loose-fitting brick or concrete rings, which allows the liquids to seep through the brick gaps or perforations within the concrete rings, leaving the solids behind.

Original cesspools are typically 3- to 4-feet in diameter and usually located 10 feet away from the exterior foundation of the home, in line with the main 4” sewer-vent pipe. Homes with crawlspaces or slab on grade construction have cesspools typically located about 3- to 5-feet below ground surface, while homes with a basement will commonly be 8- to 10-feet below the ground surface.

Cesspool Decommissioning

Cesspool Decommissioning – Technician performing an onsite cesspool evaluation

Why should I worry about a cesspool?

Abandoned cesspools can become unstable and collapse, causing a sinkhole or completely collapse within the yard. Falling into a collapsed or collapsing cesspool, that may contain liquids and sludge, can cause serious injury or death.

If you suspect that a sinkhole is forming within your yard, the area should be roped off immediately to prevent anyone from falling into the opening and a qualified expert should be contacted for assistance.

How do you find a cesspool(s)?

The likely location(s) of the cesspool(s) would need to be determined by sending out a technician to the property and conducting research through public records, if available.  The on-site technician locates the main 4” main sewer-vent pipe that extends through the roof and matches it up to information gained through public records.  From the foundation, original cesspools are usually 10’ from the home. If multiple cesspools are located on the property, they can generally be found through diagrams within public records. Following the original plumbing, gaining information through public records and physically probing to them is the most reliable way to find the cesspool(s).

 

Cesspool Decommissioning

Cesspool Decommissioning – Cesspool marked out for excavation

Decommissioning of a cesspool

How do you decommission a cesspool?

EcoTech uses excavation equipment to dig to the top of the structure to expose and open the cesspool. Once the cesspool lid is removed, our technicians will then inspect the interior of the cesspool, pump any liquid or sludge that may be present, and completely fill the cesspool with gravel or sand. After the decommissioning has taken place, the technicians replace the soil overburden, bringing the area back to surface grade

The proper cesspool decommissioning permit will need to be obtained for the city and/or the county the cesspool is located in.  An inspection may also need to take place, after the system has been filled, depending on the county. Multnomah County will always require an inspection of the filled cesspool, prior to the decommissioning permit being finalized and the overburden replaced. If an inspection is required by the city/county, and a permit pulled for the cesspool decommissioning, once approved, the permit will be closed with the city.

 

Cesspool Decommissioning

Cesspool Decommissioning – Cesspool found, constructed out of loose fitting bricks

Cesspool Decommissioning

Cesspool Decommissioning – Cesspool found, constructed of concrete rings

Cesspool Decommissioning

Cesspool Decommissioning – Cesspool filled with sand, excavation fenced off and ready for inspection

For more information on local cities requirements on cesspool decommissioning within the Portland Metro area, please click on the following links:

Please note: although most of these links will reference septic tanks, the decommissioning processes is relatively similar.

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Illustration and Photos

Below we’ve provided seismic retrofit attachments illustrations and photos to present a more in-depth visualization of what a seismic upgrade entails.  Although each home is unique, EcoTech is dedicated to tailor each retrofit plan to protect your home against earthquake damage.

 

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Rendition of basic framing for a home

ATTACHING SILL PLATE TO FOUNDATION & RIM JOIST TO THE SILL PLATE

  • The Sill Plate is attached to the Foundation due to older homes “sitting” atop the concrete foundation, meaning there is nothing keeping the house physically attached, to the base of the home.  Thus, when a violent shaking earthquake occurs, the end result is the house literally being knocked off the foundation.
  • Attaching the Sill Plate to the Rim Joist follows the same logic as attaching the sill plate to the foundation.  When connecting all of these vital pieces of the home together, it is making a solid infrastructure, that allows the house to move as one part, not three separate sections.
Seismic Retrofit Attachments

Seismic Retrofit Attachments – Large Plate is attaching the Sill Plate to the Foundation. Small Plate is attaching the Rim Joist to the Sill Plate.

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Close Up of Large Plate is attaching the Sill Plate to the Foundation. Small Plate is attaching the Rim Joist to the Sill Plate.

ATTACHING POST TO BEAM & POST TO FLOOR

  • Attaching the Post to the Beam and the Post to the Floor follows along the same rule as above, this is accomplishing the goal of making the home as one solid unit.  When the ground shakes, the whole house will move together, not different pieces falling like dominos.
Seismic Retrofit Attachments

Seismic Retrofit Attachments – Attaching the Support Post in the lower part of the home to the Support Beam of the first floor.

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Attaching the Support Post to the Floor of the lower portion of the home.

APPLYING PLYWOOD SHEETING ON CRIPPLE WALL CONSTRUCTION

  • A Cripple Wall is usually found in older homes.  The cripple wall usually occurs between the first floor and the foundation, it is generally thought of as the weakest part of older buildings.  This is due to the fact that there is no concrete between the first floor and the foundation, it is usually made up of horizontal wood siding or stucco.  Since no concrete is between the home and the foundation, the collapse of the cripple wall could result in the main floor dropping to the ground.
Seismic Retrofit Attachments

Seismic Retrofit Attachments – Cripple Wall with only horizontal wood and no concrete, between the foundation and the first floor.

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Plywood sheeting is added to the Cripple Wall construction to keep from the collapse of the first floor into the ground.

BOLTING THE SILL PLATE TO FOUNDATION IN THE GARAGE

  • Bolting the Sill Plate to the Garage Foundation is the same concept as adding this extra security to the home.  The garage maybe attached to the home or there may be living space within the garage, either way bolting the sill plate to the garage foundation, allows the structure to move as one.
Seismic Retrofit Attachments

Seismic Retrofit Attachments – Two bolts within the Sill Plate to the Foundation of the garage.

STRAPPING THE WATER HEATER & NATURAL GAS SHUT-OFF VALVES

  • Strapping the Water Heater to a wall or post protects people from a bursting water heater or reduces fire potential.
  • Installing a Natural Gas Shut-Off Valve help to prevent houses from catching fire due to broken natural gas lines.
Seismic Retrofit Attachments

Seismic Retrofit Attachments – Water heater strapped to basement post.

Seismic Retrofit Attachments

Seismic Retrofit Attachments – Natural gas shut-off valve.

 

UST Soil Sampling and Tank Inspection

Soil Sampling and Tank Inspection Common Questions

A UST Soil Sampling and Tank Inspection is almost identical to a Soil Sample.  The major difference between the two is that besides sampling between 12″ to 24″ beneath the bottom of the tank, the tank itself is opened up and inspected for its contents.

Why would a Tank Inspection be needed?

There are a couple different reasons that it is required to include the additional service of the Tank Inspection to the Soil Sampling, here are a few examples of why that would be needed:

  • During a tank search an underground storage tank was found, yet the technician was unable to get the fill cap off to determine its contents.  The fill cap may be inaccessible due to the cap being covered over, rusted shut or the fill pipe itself is completely filled and the contents of the tank can not be determined.
UST Soil Sampling and Tank Inspection

UST Soil Sampling and Tank Inspection – Tank found under concrete patio, fill cap inaccessible due to patio pavers.

  • The tank had been decommissioned previously but never registered with the DEQ.  In order for the underground storage tank to be registered with the DEQ, the soil beneath the tank needs to be sampled and the contents of the tank need to be verified.

The Tank Inspection

How do you perform a Tank Inspection?

After the tank has been located and marked out for soil sampling, our technicians will dig down to the top of the tank, cut open the tank and verify the contents.

Once the tank has been opened up, what is the best case scenario?

What we always hope for is clean soil samples and a properly decommissioned tank.  With samples below the DEQ reporting level of 50 PPM and a tank filled with clean material, the UST can then be registered with the DEQ.

UST Soil Sampling and Tank Inspection

UST Soil Sampling and Tank Inspection – Properly decommissioned tank filled with a concrete slurry.

What if the tank has been decommissioned with a proper fill material, but not filled all the way to the top of the tank, and the soil samples come back below the DEQ reporting level?

As long as the samples come in below the DEQ reporting level of 50 PPM, the remaining gap can be filled with additional fill material to ensure the tank has been decommissioned properly.  Once the tank has been certified as decommissioned, it can now be registered with the DEQ.

UST Soil Sampling and Tank Inspection

UST Soil Sampling and Tank Inspection – Tank inspection with gap in the proper fill material, tank will be filled with additional fill material and can then be registered with the DEQ

 

What are additional circumstances that are encountered with Tank Inspections?

Fill Material

  • Gap in proper fill material, below reporting level of 50 PPM:  Fill void with additional fill material and the tank can then be registered with the DEQ.
  • Proper fill material, leaking tank above 50 PPM: Tank has been decommissioned properly, remediation is required to determine that the leak has been contained. Once the clean-up is completed, the tank can then be registered with the DEQ.
  • Improper fill material: Improper fill material needs to be removed and the tank re-decommissioned. Additionally, if the tank is leaking above 50 PPM, remediation will need to take place to clean-up the site. Once the new decommissioning is completed, the tank can then be registered with the DEQ.

Water

  • Water in gap of the proper fill material, below reporting level of 50 PPM: Pump water out of the void and fill gap with additional fill material. Tank can now be registered with the DEQ.
  • Water completely fills the tank: Regardless of the fill material, everything within the tank needs to be pumped out and replaced with new fill material. Additionally, if the tank is leaking above 50 PPM, remediation will need to take place to clean-up the site. Once the new decommissioning is completed, the tank can then be registered with the DEQ.
UST Soil Sampling and Tank Inspection

UST Soil Sampling and Tank Inspection – Liquid found inside of opened tank

  • Tank is opened and it is empty.  If the samples come in below 50 PPM, the tank can be decommissioned and registered with the DEQ.  If the samples come in above 50 PPM, the tank can be decommissioned with remediation and then registered with DEQ
UST Soil Sampling and Tank Inspection

UST Soil Sampling and Tank Inspection – Empty tank discovered during a Tank Inspection.

UST Tank Search for Buyers

UST Tank Search for Buyers – Common Questions

As a Buyer, searching for an underground storage tank has become integrated as part of the inspection period. These are some of the most common questions that we are asked regarding the tank inspection process and why it is important to protect yourself before you buy.

What is an underground storage tank (UST)?

Homes, apartments, farms and some businesses that are currently or were previously heated using diesel heating oil, used an underground storage tank (UST) to store the heating oil. The USTs were usually buried in the yard, and copper tubing or steel piping was installed to deliver the diesel from the tank to the furnace. In Oregon, an estimated 100,000 USTs were installed for home heating.

UST Tank Search for Buyers

UST Tank Search for Buyers – Rendition of an underground storage tank (UST) buried in a yard, with the supply lines running into the home.

Why should I worry about a UST?

Underground storage tanks are made of steel, which are selected for their strength, not for their corrosion resistance. Therefore steel USTs rust through, given enough time. Like a roof, steel storage tanks have a life of about 25 years, and like a roof it is cheaper to replace the tank or convert to another heat source before it leaks and the damage is done.

UST Tank Search for Buyers

UST Tank Search for Buyers – Removed tank with numerous holes, this allows the diesel fuel to leak into the surrounding soil.

Performing the UST tank search

How do you find an abandoned UST?

The best way to determine if there is an abandoned oil tank on the property, is to conduct a tank search.

How do you perform a tank search?

EcoTech first will perform a Tank Background Search, this entails a detailed examination of state and local databases, as applicable. Besides years of on-the-job experience, our technician conducts a visual inspection for product lines and fill or vent pipes, utilizes metal detectors and Terra, our specially trained Petroleum Detection K-9.

UST Tank Search for Buyers

UST Tank Search for Buyers – Terra finds a tank

UST Tank Search for Buyers

UST Tank Search for Buyers – The UST Terra found during the tank search, is now marked out for sampling.

What if there is an in-service tank already on the property, should I still do a tank search?

EcoTech highly recommends doing a tank search to rule out any additional tanks that may or may not be on the property. On average our tank searches cost $99.00, during the inspection period this is money well invested. Not only does a tank search give you peace of mind that there are no additional tanks on the property. It can also save you from years of worry or money spent if there is indeed an additional leaking tank on the property, which you now own and are responsible for cleaning up.

 

UST Tank Search for Sellers

UST Tank Search for Sellers – Common Questions

As a homeowner, you may be thinking about or are preparing to put your home up for sale. For some homeowners, you may want to perform a tank search to prepare yourself for any unforeseen surprises during the home inspection period. On the other hand, you may know that there is a tank on your property that was decommissioned and never registered with the DEQ or that there is an abandoned oil tank, but you don’t know where. These are some of the most common questions that we are asked regarding the tank inspection process and important information you should know before you sell.

What is an underground storage tank (UST)?

Homes, apartments, farms and some businesses that are currently or were previously heated using diesel heating oil, used an underground storage tank (UST) to store the heating oil. The USTs were usually buried in the yard, and copper tubing or steel piping was installed to deliver the diesel from the tank to the furnace. In Oregon, an estimated 100,000 USTs were installed for home heating.

UST Tank Search for Sellers

UST Tank Search for Sellers – Rendition of an underground storage tank (UST) buried in a yard, with the supply lines running into the home.

Why should I worry about an UST?

Underground storage tanks are made of steel, which are selected for their strength, not for their corrosion resistance. Therefore steel USTs rust through, given enough time. Like a roof, steel storage tanks have a life of about 25 years, and like a roof it is cheaper to replace the tank or convert to another heat source before it leaks and the damage is done.

UST Tank Search for Sellers

UST Tank Search for Sellers – Shot from interior of tank, many small holes in the UST, which will cause diesel fuel to leak into the surrounding soil.

Performing the UST tank search

How do you find an abandoned UST?

The best way to determine if there is an abandoned oil tank on the property, is to conduct a tank search. As the homeowner, you may also look for these tell-tale signs of an abandoned oil tank:

  • An Oil Fill Pipe, these are usually close to the ground and near where the furnace is located in your home.  The lid itself will usually indicate OIL in the center of the cap.
UST Tank Search for Sellers

UST Tank Search for Sellers – Fill pipes can appear in multiple places within a property, in a walkway, grass, driveway, and even under a deck are a few examples.

  • A Vent Pipe, this is usually attached to the home, about two to eight feet up the side of the house and it is 1.25 to 1.5 inches in diameter with a small vent cap on it.

 

UST Tank Search for Sellers

UST Tank Search for Sellers – 4 different types of vents and their locations.  Fill vents can come in different sizes, colors, and may be placed at varying sections of the home.

  • Product lines, may be found sticking out of the ground in the yard, in a crawlspace or basement floor.  Product lines may still be attached to a basement or crawlspace wall next to water or gas pipes.
UST Tank Search for Sellers

UST Tank Search for Sellers – Crimped product lines may appear as random pipes sticking out of a basement floor or out of the dirt near the home in the yard. A product line may also appear running up a wall in a basement or crawlspace, like the far right picture (the thin line on the right)

  • Patching, will be present on a basement floor, it appears as though a pipe has been removed and covered with concrete.  The patching may appear as a bad “patch job” with numerous bumps and grooves.
UST Tank Search for Sellers

UST Tank Search for Sellers – Patching on a basement floor.

How do you perform a tank search?

EcoTech first will perform a Tank Background Search, this entails a detailed examination of state and local databases, as applicable. Besides years of on-the-job experience, our technician conducts a visual inspection for product lines and fill or vent pipes, utilizes metal detectors and Terra, our specially trained Petroleum Detection K-9.

UST Tank Search for Sellers

UST Tank Search for Sellers – Terra finds a tank within a planter.

UST Tank Search for Sellers

UST Tank Search for Sellers – The tank that Terra found is marked out. The purple arrow indicates where the vent pipe has been removed from the siding. The red arrows indicate the length of the tank, marked with orange flags as well as the tip of the measuring tape.

 

UST Soil Sampling

UST Soil Sampling Common Questions

Whether a tank search has resulted in a UST being discovered or if there is an in-service tank on the property, EcoTech highly recommends soil sampling be completed around the tank.

If you are a buyer, it is imperative for you to obtain soil samples on the underground storage tank, as once you purchase the property, you have now purchased the UST and if it is leaking, are now responsible for the clean-up.

If you are a seller or a homeowner thinking about selling, and you know you have an UST on your property, preemptive soil samples will allow you prepare for pre-inspection complications.

For more information on underground storage tanks and real estate transactions, please see the DEQ Buying or Selling guide for helpful tips DEQs Buying or Selling a Home with a UST

What if a UST is found?

Soil Samples are recommended. Per Oregon DEQ, the best way to determine if a UST has leaked, is to have soil samples collected from under each end of the tank and have the samples analyzed for diesel and heavy oil. Each sample should be analyzed at an independent laboratory that is DEQ certified.

UST Soil Sampling

UST Soil Sampling – Rendition of technician taking soil samples 12-24″ beneath an underground storage tank.

UST Soil Sampling

UST Soil Sampling – Sampling tubes filled with soil from around an underground storage tank. The soil is then placed in a jar and sent to the lab for testing.

There is an in-service tank, should I perform soil samples?

As a prospective buyer, it is essential to test a tank before purchasing the property to determine if it has leaked or is currently leaking. The current property owner is responsible for any necessary contamination clean-up from a leaking underground storage tank. Purchasing a property without testing a tank makes you, as the new property owner, liable for a prior or currently leaking UST.

I’m selling my home and the buyer has found a tank, what are the next steps for me?

EcoTech recommends that you decommission the tank and register it with DEQ. Although, through our experience, buyers and their agents will require at a minimum proof of clean soil samples.

Types of Soil Samples

What are the type of UST soil samples? 

There are three different categories that sample results can be placed into:

Non-Detect (ND)

In-service tank: samples that were analyzed have come back as non-detect and no further tests are necessary. EcoTech does recommend that the decades old tank be decommissioned and a new heat source chosen, as soon as it is practical, before the tank does leak.

Out-of-service tanks: samples that were analyzed have come back as non-detect and no further tests are necessary. EcoTech does recommend that the out-of-service tank be decommissioned within 90 days of the soil samples and registered with DEQ.

*For both the in-service and out-of-service non-detect samples that were taken from each end of the UST, does not rule out the possibility of contamination underneath the soils of the tank, that is why EcoTech recommends decommissioning of the UST.*

50 PPM (parts per million) or less

In-service tank: samples that were analyzed indicate that a leak is present. Although this is a low detection and it is not reportable to DEQ, it indicates a leak has started and should be a concern. EcoTech highly recommends that the tank be taken out-of-service and decommissioned and registered with the DEQ.

Out-of-service tank: samples that were analyzed indicate that a leak is present. Although this is a low detection and it is not reportable to DEQ, it indicates a leak has started and should be a concern. EcoTech recommends that the out-of-service tank be decommissioned and registered with DEQ.

50.1 PPM or Greater

In-service or out-of-service tanks: “The OR DEQ requires that any site where a soil sample analysis shows petroleum concentrations of 50 PPM or greater, must be reported to the DEQ within 72 hours. Remediation will be determined based on the extent of the contamination.” Simply put, the tank is leaking above the reporting limit, EcoTech is required to report the leak to the DEQ, corrective action is now needed to clean-up the site.

Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning Common Questions

 

What does it mean to decommission a UST?

The most generic term, is to take the tank out of service.  Underground Storage Tank or UST decommissioning is accomplished by ensuring the tank has been properly cleaned and removed or completely filled with an inert material. The inert material consists either of perlite, a sand-like material or slurry, concrete.

If the tank is to be registered with DEQ, two soil samples will be taken from inside the bottom of the tank, after being pumped and cleaned, and analyzed for diesel and heavy oil. Each sample needs to be analyzed at an independent laboratory that is DEQ certified.

If the samples come back as non-detected, the tank can be then registered with the DEQ.

If the samples come back above the DEQ reporting limit (50.1 PPM), remediation will need to take place and once the corrective action has been completed, the tank will be registered with DEQ.  If soil remediation is need, please see our Decommissioning via Heating Oil Contaminated Soil Clean-Up page.

Why should homeowners decommission their UST and register it with the DEQ

I’ve emptied my tank of oil years ago and don’t use it any more, doesn’t that mean it is decommissioned?

No, in order to decommission the tank you will need to take the tank permanently out of service. This is completed by either removing the tank or filling it in place with an inert material.

Can I decommission my own UST?

According to the DEQ, it is legal for a homeowner to decommission their own UST, assuming that you perform the work yourself and comply with all applicable local, state and federal rules. Before deciding to decommission your own tank, the DEQ highly recommends that you read the DEQ Cleanup Guidance for Homeowners to understand the full scope of work involved in completing a decommissioning project. DEQ Decommissioning Guide for Homeowners

I’m selling my home and have switched over to gas years ago, should I decommission my tank?

It is not a requirement to decommission your tank before selling your home. Unfortunately in this highly active real estate market, many buyers will require at a minimum, proof of recent clean soil samples. Additionally, you will need to provide the buyer with documentation that the tank has been pumped of all of its contents. The documentation that the DEQ requires is dated receipts from the company that pumped the oil out of the tank; or receipts from the oil recycling company, if you pumped the tank yourself.

Do I have to decommission my UST?

No, it is not a requirement to decommission your tank once you stop using it.  However, if you are thinking about selling your home, most buyers and their agents request decommissioning and registration before closing. Per DEQ, you will need to ensure that the tank has been emptied of oil and you will need to provide that documentation to the new buyer.  DEQ Requirements for Tanks No Longer in Use

Do I have to register my UST?

It is not required by DEQ to register the tank, but it is highly recommended. However, if you are decommissioning the tank as part of the sale of the home, this is usually a prerequisite prior to closing.

Why should I register my UST?

There are three primary benefits of registering the UST decommissioning with the DEQ:

  1. The decommissioning becomes public record.  So, even if your copy of the paperwork is misplaced or the name of the contractor that performed the work is forgotten, the record remains in the DEQ files.
  2. When the DEQ changes any of their rules (i.e. reporting limits, remediation guidelines, etc.), previously closed or registered tanks are “grandfathered” in.  Tanks that were decommissioned and not registered are subject to the new rules.  For example, over time the DEQ required the locations of soil sampling to change.  Meaning a previously unregistered decommissioned tank, would need to obtain additional soil samples to bring the tank up to the new DEQ sampling requirements.
  3. Most buyers are requiring DEQ registration because they don’t want to deal with future DEQ rule changes.  Even if you don’t plan to sell the property any time soon, registering the tank now can prevent added costs prior to and during a future sale.

I have a tank that was decommissioned years ago, but never registered with the DEQ, how do I now get it registered?

In order to establish if the tank has been decommissioned properly, soil samples and a tank inspection would be required. Soil samples need to be taken in order to determine if the tank had leaked prior to decommissioning. A tank inspection is necessary to establish if the tank has been decommissioned properly.

If the soil samples are clean and the tank has been decommissioned properly, the tank then can be registered with the DEQ.

USTs that have been Decommissioned inproperly

What happens if it isn’t decommissioned properly?

There could be a couple of different reasons a tank has not been decommissioned properly.  There may be inadequate or contaminated fill material, water within the tank or simply something that shouldn’t be in the tank (i.e. paint cans, large rocks, etc.).  Besides what is inside the tank, the soil samples will need to be taken into consideration to allow the tank to be certified as decommissioned to register with the DEQ.

  • Fill Material:  If the fill material within the tank is not an approved by the DEQ, that material will need to be removed and the tank will be re-decommissioned to DEQ standards for certification.  The same reasoning will go with contaminated fill material, even if it is DEQ approved material.  The contaminated material will need to be removed and the tank will need to be re-decommissioned to DEQ standards for certification.
  • Water:  If there is water within the tank, all water will be pumped out of the tank and re-decommissioned in order to certify with the DEQ.
  • Unconventional Items:  From time to time, items are found within a tank that should NOT be there.  Items such as large boulders, paint cans, trash cans and even tires have been discovered within a tank.  If this situation does arise, all items will need to be removed and disposed of in a landfill and the tank will need to be decommissioned.
Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning – Concrete, pain cans and water found within a tank.

What exactly do you do to decommission a tank?

In order to decommission an underground storage tank, we need to follow some step-by-step processes to ensure that we are able to take soil samples and inspect the tank properly.  This is the process by which EcoTech begins each in-place underground storage tank decommissioning project:

1.  We dig down, expose the tank and cut it open.

Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning – Exposed tank top.

2.  All tank contents are removed; heating oil, residual liquids, sludge.

3.  Clean and dry the tank interior and inspect it for holes.

Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning – Holes from within a tank.

4.  Collect soil samples from the inside and through the bottom of the tank.

Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning – The technicians cut two holes in the bottom of the tank to expose the soil underneath, two samples are then “grabbed” underneath the tank bottom.

5.  Soil Samples are submitted to the lab the same day for analysis, with results typically back the next business day by noon.

6.  Pending favorable laboratory results (less than 50 PPM), the tank can be backfilled with perlite or slurry.

***If soil sample results come in above the 50 PPM, remediation would be required to bring the site up to DEQ requirements.  (Please see our Heating Oil Contaminated Soil Clean-Up section for additional information on remediation Clean-Up with Decommissioning).

Underground Storage Tank or UST Decommissioning

Underground Storage Tank or UST Decommissioning – Tank filled with slurry.

7.  After the tank has been filled, the tank is then covered back over with the previous landscape (i.e. grass, concrete, dirt, etc.).