Radon NJ Radon Testing and Information About NJ Radon Mitigation    

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Office of Air and Radiation (OAR), Office of Radiation and Indoor Air (ORIA) (6609J) 402-K-00-008, July 2000 EPA Recommends: If you are buying a home or selling your home, have it tested for radon.   For a new home, ask if radon-resistant construction features were used and if the home has been tested.   Fix the home if the radon level is 4 picoCuries per liter (pCi/L) or higher.   Radon levels less than 4 pCi/L still pose a risk, and in many cases, may be reduced.   Take steps to prevent device interference when conducting a New Jersey radon test.

Based on information contained in the National Academy of Sciences report, The Health Effects of Exposure to Indoor Radon, radon is estimated to cause between 15,000 and 22,000 lung cancer deaths per year.  Data on (non-radon) causes of death are from Injury Facts, 1999 Edition, National Safety Council, Itasca, IL.

New Jersey Radon NJ Radon Testing and Information About NJ Radon Mitigation

OVERVIEW

This Guide answers important questions about radon and lung cancer risk.  It also answers questions about testing and fixing for anyone buying or selling a home.

Radon Is a Cancer-Causing, Radioactive Gas

You cannot see, smell, or taste radon. But it still may be a problem in your home.  When you breathe air containing radon, you increase your risk of getting lung cancer.  In fact, the Surgeon General of the United States has warned that radon is the second leading cause of lung cancer in the United States today.  If you smoke and your home has high radon levels, your risk of lung cancer is especially high.

You Should Test for Radon

Testing is the only way to find out your home's radon levels. EPA and the Surgeon General recommend testing all homes below the third floor for radon.

You Can Fix a Radon Problem

If you find that you have high radon levels, there are ways to fix a radon problem. Even very high levels can be reduced to acceptable levels.

If You Are Selling a Home..

EPA recommends that you test your home before putting it on the market and, if necessary, lower your radon levels. Save the test results and all information you have about steps that were taken to fix any problems. This could be a positive selling point. 

If You Are Buying a Home..

EPA recommends that you know what the indoor radon level is in any home you consider buying.  Ask the seller for their radon test results.  If the home has a radon-reduction system, ask the seller for information they have about the system.

If the home has not yet been tested, you should have the housed tested.

If you are having a new home built, there are features that can be incorporated into your home during construction to reduce radon levels.

The radon testing guidelines in this Guide have been developed specifically to deal with the time-sensitive nature of home purchases and sales, and the potential for radon device interference.  These guidelines are slightly different from the guidelines in other EPA publications which provide radon testing and reduction information for non-real estate situations.

This Guide recommends three short-term testing options for real estate transactions.  EPA also recommends testing a home in the lowest level which is currently suitable for occupancy, since a buyer may choose to live in a lower area of the home than that used by the seller.

1. Why Do You Need to Test for Radon?

a. Radon Has Been Found In Homes All Over the U.S.

Radon is a radioactive gas that has been found in homes all over the United States. It comes from the natural breakdown of uranium in soil, rock and water and gets into the air you breathe. Radon typically moves up through the ground to the air above and into your home through cracks and other holes in the foundation. Radon can also enter your home through well water.  Your home can trap radon inside.

Any home can have a radon problem. This means new and old homes, well-sealed and drafty homes, and homes with or without basements. In fact, you and your family are most likely to get your greatest radiation exposure at home. That is where you spend most of your time.

over 1 out of every 15 homes in the United States is estimated to have an elevated radon level (4 pCi/L or more).  Elevated levels of radon gas have been found in homes in your state. Contact your state radon office for information about radon in your area.

b. EPA and the Surgeon General Recommend That You Test Your Home

Testing is the only way to know if you and your family are at risk from radon. EPA and the Surgeon General recommend testing all homes below the third floor for radon.

You cannot predict radon levels based on state, local, and neighborhood radon measurements.  Do not rely on radon test results taken in other homes in the neighborhood to estimate the radon level in your home.  Homes which are next to each other can have different radon levels.  Testing is the only way to find out what your home's radon level is.

In some areas, companies may offer different types of radon service agreements.  Some agreements let you pay a one-time fee that covers both testing and radon mitigation, if needed.  Contact your state radon office to find out if these are available in your state.

2. I'm Selling a Home.  What Should I Do?

a. If Your Home Has Already Been Tested for Radon..

If you are thinking of selling your home and you have already tested your home for radon,  review the Radon Testing Checklist to make sure that the test was done correctly.  If so, provide your test results to the buyer.

No matter what kind of test you took, a potential buyer may ask for a new test especially if:

• The Radon Testing Checklist items were not met;
• The last test is not recent, e.g., within two years;
• You have renovated or altered your home since you tested; or
• The buyer plans to live in a lower level of the house than was tested, such as a basement suitable for occupancy but not currently lived in.

A buyer may also ask for a new test if your state or local government requires disclosure of radon information to buyers.

b. If Your Home Has Not Yet Been Tested for Radon..

Have a test taken as soon as possible. If you can, test your home before putting it on the market.  You should test in the lowest level of the home which is suitable for occupancy. This means testing in the lowest level that you currently live in or a lower level not currently used, but which a buyer could use for living space without renovations. 

The radon test result is important information about your home's radon level.  Some states require radon measurement testers to follow a specific testing protocol.  If you do the test yourself, you should carefully follow the testing protocol for your area or EPA's Radon Testing Checklist.  If you hire a contractor to test your residence, protect yourself by hiring a qualified individual or company.

You can determine a service provider's qualifications to perform radon measurements or to mitigate your home in several ways.  Check with your state radon office.  Many states require radon professionals to be licensed, certified, or registered.  Most states can provide you with a list of knowledgeable radon service providers doing business in the state.  In states that don't regulate radon services, ask the contractor if they hold a professional proficiency or certification credential.  Such programs usually provide members with a photo-ID card, which indicates their qualification(s) and its expiration date.  If in doubt, you should check with their credentialing organization.  Alternatively, ask the contractor if they've successfully completed formal training appropriate for testing or mitigation, e.g., a course in radon measurement or radon mitigation.

3. I'm Buying a Home.  What Should I Do?

a. If the Home Has Already Been Tested for Radon..

If you are thinking of buying a home, you may decide to accept an earlier  test result from the seller, or ask the seller for a new test to be conducted by a qualified radon tester.  Before you accept the seller's test, you should determine:

• The results of previous testing;

• Who conducted the previous test:  the homeowner, a radon professional, or some other person;

• Where in the home the previous test was taken, especially if you may plan to live in a lower level of the home.  For example, the test may have been taken on the first floor.  However, if you want to use the basement as living space, test there; and

• What, if any, structural changes, alterations, or changes in the heating, ventilation, and air conditioning (HVAC) system have been made to the house since the test was done.  Such changes may affect radon levels.

If you accept the seller's test, make sure that the test followed the Radon Testing Checklist.

If you decide that a new test is needed, discuss it with the seller as soon as possible. If you decide to use a qualified radon tester, contact your state radon office to obtain a copy of their approved list of radon testing companies.

b. If the Home Has Not Yet Been Tested for Radon..

Make sure that a radon test is done as soon as possible. Consider including provisions in the contract specifying:

• Where the test will be located;

• Who should conduct the test;

• What type of test to do;

• When to do the test;

• How the seller and the buyer will share the test results and test costs (if necessary); and

• When radon mitigation measures will be taken and who will pay for them.

Make sure that the test is done in the lowest level of the home suitable for occupancy. This means the lowest level that you are going to use as living space which is finished or does not require renovations prior to use. A state or local radon official or qualified radon tester can help you make some of these decisions.

If you decide to finish or renovate an unfinished area of the home in the future, a radon test should be taken before starting the project and after the project is finished. Generally, it is less expensive to install a radon-reduction system before (or during) renovations rather than afterwards.

4. I'm Buying or Building a New Home.  How Can I Protect My Family?

a. Why Should I Buy a Radon-Resistant Home?

Radon-resistant techniques work.  When installed properly and completely, these simple and inexpensive passive techniques can help to reduce radon levels.  In addition, installing them at the time of construction makes it easier to reduce radon levels further if the passive techniques don't reduce radon levels below 4 pCi/L.  Radon-resistant techniques may also help to lower moisture levels and those of other soil-gases.  Radon-resistant techniques:

	Making Upgrading Easy:  Even if built to be radon-resistant, every new home should be tested for radon after occupancy.  If you have a test result of 4 pCi/L or more, a vent fan can easily be added to the passive system to make it an active system and further reduce radon levels.
	Are Cost-Effective:  Building radon-resistant features into the house during construction is easier and cheaper than fixing a radon problem from scratch later.  Let your builder know that radon-resistant features are easy to install using common building materials.
	Save Money:  When installed properly and completely, radon-resistant techniques can also make your home more energy efficient and help you save on your energy costs.

In a new home, the cost to install passive radon-resistant features during construction is usually between $350 and $500.  In some areas, the cost may be as low as $100.  A qualified mitigator will charge about $300 to add a vent fan to a passive system, making it an active system and further reducing radon levels.  In an existing home, it usually costs between $800 and $2,500 to install a radon mitigation system.

b. What Are Radon-Resistant Features?

Radon-resistant techniques (features) may vary for different foundations and site requirements.  If you're having a house built, you can learn about EPA's Model Standards (and architectural drawings) and explain the techniques to your builder.  If your new house was built (or will be built) to be radon-resistant, it will include these basic elements:

Gas-Permeable Layer:  This layer is placed beneath the slab or flooring system to allow the soil gas to move freely underneath the house.  In many cases, the material used is a 4-inch layer of clean gravel.  This gas-permeable layer is used only in homes with basement and slab-on-grade foundations; it is not used in homes with crawlspace foundations.   Plastic Sheeting:  Plastic sheeting is placed on top of the gas-permeable layer and under the slab to help prevent the soil gas from entering the home.  In crawl spaces, the sheeting (with seams sealed) is placed directly over the crawlspace floor.   Sealing and Caulking:  All below-grade openings in the foundation and walls are sealed to reduce soil gas entry into the home.   Vent Pipe:  A 3- or 4-inch PVC pipe (or other gas-tight pipe) runs from the gas-permeable layer through the house to the roof, to safely vent radon and other soil gases to the outside.   Junction Boxes:  An electrical junction box is included in the attic to make the wiring and installation of a vent fan easier.  For example, you decide to activate the passive system because your test result showed an elevated radon level (4 pCi/L or more).  A separate junction box is placed in the living space to power the vent fan alarm.  An alarm is installed along with the vent fan to indicate when the vent fan is not operating properly.

5. How Can I Get Reliable Radon Test Results?

Radon testing is easy and the only way to find out if you have a radon problem in your home.

a. Types of Radon Devices

Since you cannot see or smell radon, special equipment is needed to detect it.  When you're ready to test your home, you can order a radon test kit by mail from a qualified radon measurement services provider or laboratory.  You can also hire a qualified radon tester, very often a home inspector, who will use a radon device(s) suitable to your situation.  The most common types of radon testing devices are listed below.  As new testing devices are developed, you may want to check with your state radon office before you test to get the most up-to-date information.

Passive Devices

Passive radon testing devices do not need power to function.  These include charcoal canisters, alpha-track detectors, charcoal liquid scintillation devices, and electret ion chamber detectors which are available in hardware, drug, and other stores; they can also be ordered by mail or phone.  These devices are exposed to the air in the home for a specified period of time and then sent to a laboratory for analysis.  Both short-term and long-term passive devices are generally inexpensive. Some of these devices may have features that offer more resistance to test interference or disturbance than other passive devices. Qualified radon testers may use any of these devices to measure the home's radon level.

Active Devices

Active radon testing devices require power to function. These include continuous radon monitors and continuous working level monitors.  They continuously measure and record the amount of radon or its decay products in the air.  Many of these devices provide a report of this information which can reveal any unusual or abnormal swings in the radon level during the test period. A qualified tester can explain this report to you.  In addition, some of these devices are specifically designed to deter and detect test interference. Some technically advanced active devices offer anti-interference features.  Although these tests may cost more, they may ensure a more reliable result.

b. General Information for All Devices

A state or local radon official can explain the differences between devices and recommend the ones which are most appropriate for your needs and expected testing conditions.

Make sure to use a radon measurement device from a qualified laboratory.  Certain precautions should be followed to avoid interference during the test period.  See the Radon Testing Checklist for more information on how to get a reliable test result.

c. Preventing or Detecting Test Interference

There is a potential for test interference in real estate transactions. There are several ways to prevent or detect test interference:

• Use a test device that frequently records radon or decay product levels to detect unusual swings;
• Employ a motion detector to determine whether the test device has been moved or testing conditions have changed;
• Use a proximity detector to reveal the presence of people in the room which may correlate to possible changes in radon levels during the test;
• Record the barometric pressure to identify weather conditions which may have affected the test;
• Record the temperature record to help assess whether doors and windows have been opened;
• Apply tamper-proof seals to windows to ensure closed house conditions; and
• Have the seller/occupant sign a non-interference agreement.

Home buyers and sellers should consult a qualified radon test provider about the use of these precautions.

d. Length of Time to Test

There Are Two General Ways To Test Your Home for Radon:

Because radon levels vary from day to day and season to season, a short-term test is less likely than a long-term test to tell you your year-round average radon level.  However, if you need results quickly, a short-term test may be used to decide whether to fix the home.

Short-Term Testing

The quickest way to test is with short-term tests. Short-term tests remain in your home from two days to 90 days, depending on the device. There are two groups of devices which are more commonly used for short-term testing. The passive device group includes alpha track detectors, charcoal canisters, charcoal liquid scintillation detectors, and electret ion chambers. The active device group consists of different types of continuous monitors.

Whether you test for radon yourself or hire a state-certified tester or a privately certified tester, all radon tests should be taken for a minimum of 48 hours. A longer period of testing is required for some devices.

 

Long-Term Testing

Long-term tests remain in your home for more than 90 days. Alpha track, and electret ion chamber detectors are commonly used for this type of testing. A long-term test will give you a reading that is more likely to tell you your home's year-round average radon level than a short-term test. If time permits (more than 90 days) long-term tests can be used to confirm initial short-term results. When long-term test results are 4 pCi/L or higher, EPA recommends fixing the home.

e. Doing a Short-Term Test..

If you are testing in a real estate transaction and you need results quickly, any of the following three options for  short-term Tests are