NRPP RADON MEASUREMENTS NEWEST ACTUAL

NRPP RADON MEASUREMENTS NEWEST ACTUAL /

UPDATED QUESTIONS AND CORRECT ANSWERS

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The EPA's "Home Buyers and Seller's Guide" recommends that

if a seller has tested his or her home for radon they should: - -

---Answers----Provide the results and any supporting information to allow the buyer to interpret results.

The averaged results of two sequential, short-term radon tests conducted at the time of a real estate transaction was 6 pCi/L. The seller feels the results were high because the house was closed during the test. What would be the most appropriate advice? - ----Answers----Inform them the test was conducted in accordance with protocols, and recommend mitigation.

Side-by-side measurements are conducted as part of a real estate transaction. The results are 3.3 and 7.6 pCi/L. How should these test results be interpreted or used? - ---- Answers----The results are too far apart. The results should be discarded and the test repeated. You should also try to determine what caused the large discrepancy in those results.

During a real estate transaction, under which testing conditions can a single measurement be used for the purpose of determining the need for mitigation? - ----Answers----A 1 / 3

48 hour test using a single continuous radon monitor, measuring and reporting in hourly increments.

Two side-by-side tests were performed as part of a real estate transaction. One result was 12 and the other was 16.How should these test results be interpreted or used? - ---- Answers----Both of the results and their average of 13.5 pCi/L should be reported, and mitigation recommended.

When performing a radon test for a real estate transaction using two side-by-side, simultaneously deployed test devices, what method issued to assess the quality of the measurements? - ----Answers----Relative percent difference of the two results.

Side-by-side measurements are conducted as part of a real estate transaction. The results are 5.0 and 11.0 .How should these measurements be interpreted? - ----Answers----Both test results, and the average of 8.0 pCi/L should be reported and mitigation recommended. However, due to the wide difference between the two results, an investigation should be conducted to find out what may have caused it.

As part of a real estate transaction, what is the criteria for evaluating the quality of two sequential measurements? - ---- Answers----There is no way to validate two measurements that were deployed at different times.

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When conducting a radon test during a real estate transaction, what is the correct level of the home to test? - ----Answers-- --Conduct the test in the lowest level of the home that could be used regularly.

When conducting a radon test for a homeowner, what is the correct level of the home to test? - ----Answers----Conduct the test on the lowest lived in level.

The quality control called "duplicates" is a measure of what? - ----Answers----Precision

The quality control called spikes"" is a measure of what? - ---- Answers----Accuracy

The quality control called "blanks" is a measure of what? - --- -Answers----Background or bias

How many control charts are required to track your duplicate measurements? - ----Answers----Two charts, one chart for when both results are below 4 pCi/L and one for when both results are at or above 4 pCi/L.

If fewer than 50 tests are conducted each month, residential measurement service providers are to perform duplicate

measurements at the minimum rate of: - ----Answers----10%

of the tests conducted.

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