Radon Mitigation >> Know If A Radon Mitigation System Is Working

Administrative Procedures for Mail-In Tests After EPA accepts an Application for a mail-in device, the applicant will be scheduled for his or her device performance test. The RQAC will send a notice to the applicant requesting the appropriate device(s) prior to the performance test date. Applicant failure to send the devices promptly may necessitate rescheduling of device exposure, Know If A Radon Mitigation System Is Working resulting in substantial delays in listing. 

The Agency exposes the devices to radon concentrations in EPA's laboratory chambers. Depending on the method type, Know If A Radon Mitigation System Is Working applicants may have up to four separately exposed devices. After exposure, devices are returned to applicants for analysis. Devices may bereturned in one or more packages. Applicants must return their measured values within the time frame specified on the Analysis Reporting Form. 

The Agency evaluates the measured values submitted by the applicant against the Agency's test criteria, Know If A Radon Mitigation System Is Working then notifies the applicant of the results.7.2.4 Procedure for Evaluating Device Performance Test Results The criterion used in the performance test requires that the value of the individual relative error (IRE)of each radon measurement not exceed 25%. 

The success or failure of each measurement in the test is determined by comparing EPA's target value to the measured value reported to EPA by the applicant.The IRE measurement test criterion formula is:Where: IRE = absolute value of the Know If A Radon Mitigation System Is Working individual relative error for device "i," in percent, for each measurement; MVi = measured value for device "i"; and TVi = target value for device "i." 

EPA's procedure for evaluating device performance test results includes an initial test and a possible retest. In their entrance performance test, Know If A Radon Mitigation System Is Working applicants may: (1) pass; (2) fail but be eligible to complete a retest;or (3) fail to meet the retest criteria and be required to reapply. Therefore, the possible outcomes are:

Initial Test: Pass: If the results of all IRE measurements are less than or equal to (#) 25%, the applicant is eligible to be listed for that device, or the participant to remain listed.Fail/Retest: If the result of any IRE measurement is greater than (>) 25%, Know If A Radon Mitigation System Is Working but all results are#50%, then the applicant/participant is eligible to retest. 

Applicants/participants who do notpass a retest will not obtain or maintain their listing. Applicants/participants who fail an initialblind test and are eligible for a retest will be notified prior to their retest opportunity.Fail/Reapply: If the result of any IRE measurement is >50%, the applicant will not be givenan opportunity to retest, Know If A Radon Mitigation System Is Working and the Application will be dropped from consideration. 

Similarly,the participant will be ineligible for a retest and will be delisted for that device.Retest: Pass: If the results of all IRE retest measurements are #25%, the applicant/participant is eligible to be listed for that device or to remain listed, as long as other Program requirements are met. Fail/Reapply: If the result of any IRE retest measurement is >25%, the applicant will not be listed Know If A Radon Mitigation System Is Working and the Application will be dropped from consideration. 

Similarly, the participant will be ineligible for a retest and will be delisted for that device.Reapplication: Applicants/participants not meeting the #50% IRE retest eligibility requirement for the initial test, or the #25% IRE requirement for the retest, Know If A Radon Mitigation System Is Working will be dropped from the Program for that device. 

To reapply to the Program, applicants and participants must submit (1) an explanation of the problem they believe occurred during their performance test and actions taken to correct the problem; and (2) a specific description of the applicant's or Know If A Radon Mitigation System Is Working participant's calibration procedures. EPA may also require these applicants/participants to submit their QA/QC plan and/or other documents for review prior to reentering the Program.

Device Performance Test Examples In this section, the device performance test and retest use a criterion known as the absolute value of the individual relative error (IRE). In this example test, Know If A Radon Mitigation System Is Working the result for device #3 has a calculated IRE of 29%, or 4 percentage points over the 25%limit. Therefore, the applicant fails the initial test. 

However, because this 29% result is less than 50%, Know If A Radon Mitigation System Is Working the applicant can retest. If the IRE result had been less than 25% (e.g., 18%), then all four measurements would have passed the test, and—assuming that all other requirements had been met—the applicant would be listed in the Program for analytical measurement services with this device.

Example 2: This example uses a continuous radon monitor (CR) submitted by an applicant; Know If A Radon Mitigation System Is Working only one measurement is required for measurement devices in the CR method category.Device ID Codes Measured Target Absolute Value of the Individual Participant EPA Value (MV) Value (TV) Relative Error (IRE)B3875 666669 15.7 35.0 0.55 (or 55%)

In this example test, the applicant's test result has a calculated IRE of 55%, or 30 percentage points over the 25%limit. Therefore, the applicant fails the initial test. However, Know If A Radon Mitigation System Is Working because this 55% result is also greater than 50%, the applicant is not eligible for a retest and must reapply if they wish to continue participating in the Program. 

If the IRE result had been less than 50%, Know If A Radon Mitigation System Is Working then the applicant would have been eligible for a retest. If the applicant then passed the retest—assuming that all other requirements had been met—that participant would be listed in the Program with this CR device. Example 3: This example uses a continuous working level monitor (CW) submitted by an applicant; only one measurement is required for devices in the CW method category.

Device ID Codes Measured Target Absolute Value of the Individual Participant EPA Value (MV) Value (TV) Relative Error (IRE)C2222 123456 0.075 0.060 0.25 (or 25%)In this example test, the applicant's test result has a calculated IRE of 25%, Know If A Radon Mitigation System Is Working which is equal to the 25% limit. Therefore, the applicant passes the initial test and achieves listed status for analytical measurement services.

QUALIFYING RADON MEASUREMENT DEVICES FOR USE IN THE PROGRAM All devices entered into the Program must be within an RPP radon measurement method category. Analytical applicants to the Program enroll with one or Know If A Radon Mitigation System Is Working more specific radon measurement devices. Applicants may enroll in the Program immediately with any measurement device that is included in the Application Device Checklists. 

These checklists include all devices, equipment, and Know If A Radon Mitigation System Is Working instruments that EPA is currently aware of that have been used by a Program participant in passing the RPP performance test. All ofthe devices, equipment, and instruments included on the checklists are associated with one or more methodcategories. Appendix A includes brief definitions of the method categories currently accepted in the Program.

EPA's Indoor Radon and Radon Decay Product Measurement Device Protocols provides a detailed explanation of these Know If A Radon Mitigation System Is Working methods.An applicant who wishes to enroll in the RPP with a device that is not included in the Application Device

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