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Support Documentation

Radon Testing Kit Instructions

The following instructions will explain how to use a radon testing kit if you are testing your home for radon for the first time and have purchased a testing kit from Enviroquest or if Enviroquest has installed a radon mitigation system at your home and gave you a radon testing kit to conduct a post-test. The accuracy of the test greatly depends on the test being conducted correctly. Please follow the instructions very carefully.

Your radon testing kit should contain one tape-sealed canister and an address label or labeled box. If anything is missing or if the canister appears to have been damaged in shipping please call us at (717) 233 – 6144 for a replacement kit.


1. REMOVE the canister from the box and save the box for returning the canister.

2. RECORD INFORMATION ON LABEL ON THE BOTTOM OF THE CANISTER. Fill in name, address, starting date, time, and location. This information is very important for notification and testing accuracy. Be sure to write the letters EVQ beside your name. This tells the lab to send Enviroquest a copy of the results.

3. OPEN THE CANISTER. Remove the adhesive strip from around the canister. Remove the lid and place it under the canister. Wrap the strip around the lower half of the canister the same way it was originally wrapped only now the canister is open.

4. PLACE THE CANISTER. Put the canister open side up on a table or shelf according to the sampling location instructions below.

5. WAIT. Do not move the canister after the test has started. The canister should remain open for 2 days (48 hours) minimum, as per EPA protocol. The closing time can vary from 2 hours earlier to 2 hours later than the full time.

6. REPLACE TOP AND RETAPE THE CANISTER. It is important to have a good seal for the test to be accurate.

7. RECORD THE STOP DATE AND TIME on the bottom label.

8. PLACE THE CANISTER IN THE BOX. Seal the box and place the address label on the box.

9. MAIL THE BOX with correct postage within one day of resealing to:

TCS Industries
4326 Crestview Road
Harrisburg, PA 17112

Your sample will be analyzed the same day it arrives at the laboratory. If you do not receive the test results from the laboratory within one week please contact us for the results.


To obtain a valid screening measurement the following conditions should exist for 12 hours prior to and during the sampling period:

  • Do not open the canister to begin the measurement if you cannot close it within the specified time period or if you are installing a new heating or air conditioning system.
  • All windows and external doors should be closed except for normal entering and exiting.
  • Fans and ventilation systems that use outside air such as attic fans and bathroom fans should not be operated during the sampling period. Air conditioners may be used.
  • Measurements should be made in the lowest livable area of house (e.g., basement). Non-suitable areas are bathrooms, kitchens, laundry rooms, root cellars, garages, crawl spaces or sumps.
  • The canister should not be placed in a location exposed to noticeable drafts or in areas where the canister can get hot. The canister should be exposed to the same air people breathe.
  • The canister should be placed at least 20 inches above the floor and 3 feet from an outside wall.
  • Do not start the test if weather forecasts are predicting severe storms or high winds where the predicted wind speeds are 30 mph or greater during the testing period.


The purpose of a screening-type measurement is to quickly determine if a house contains high concentrations of radon gas. This measurement should provide information for deciding if there is a need for additional measurements. The following sampling instructions reflect the EPA recommended measurement procedures for this method. The procedures are based on the assumption that the greatest source of radon is the soil underlying the house. If other sources are suspected, additional measurements in different locations in the home may be considered.

Radon Mitigation System Maintenance

This section will briefly discribe the recommended maintenance for radon systems. We recommend that you test the home for radon every 2 years or if you do any additional weathproofing, finishing or remodeling. It is particularly important to advise Enviroquest if you plan to add an addition on to the home. Adding an additional slab will void our warranty because the system is treating a larger area. Adding a waterproofing system after the installation of your radon system will also void your warranty.

If the liquid in your radon system pressure indicator is at 0 and is completely level we suggest you do the following:

  • Make sure the fan is running.
  • Make sure the fan switch (if applicable) has not been accidentaly swiched off.
  • Check all breakers and GFCI receptacles.
  • Be certain that the liquid is completely level. Certain systems indicate a very slight change, this does not mean that your system is not functioning. The only way to determine this is by testing the home for radon.

If you check all of the above and your level is still 0, please call our office.

Occasionally water gets trapped in the radon piping. This typically happens in cold weather. You may hear a gurgling noise in the piping. Excessive water under the slab will affect how well the radon system functions. Turn off the fan for a couple of hours. Turn the fan back on.

If you still hear water in the pipe, contact our office.

How to Install a Passive Radon System

Find out how to properly install a Passive Radon System