Pennsylvania Code › Title 25 - ENVIRONMENTAL PROTECTION › Part I - Department of Environmental Protection › Subpart D - Environmental Health and Safety › Article V - Radiological Health › Chapter 240 - RADON CERTIFICATION › Subchapter G - QA REQUIREMENTS › Section 240.604 - QA requirements for testing using primary devices

Current through Register Vol. 54, No. 28, July 13, 2024
(a)
CRMs for primary
						testers.
(1)
Calibration.
Each Department-listed CRM must have a current
						calibration. To have a current calibration, the CRM shall be calibrated in a
						Department-approved calibration facility within 1 year from the date of the
						previous calibration and when alterations or repairs are made to the
						CRM.
(2)
Background
						measurements.
Background measurements shall be performed and
						documented after every 1,000 hours of operation of scintillation cell-type CRM.
						These background measurements shall be checked by purging the unit with clean,
						aged air or nitrogen in accordance with the manufacturer's instructions. For
						all CRMs, the background shall be monitored in accordance with the
						manufacturer's instructions.
(3)
Check source counting.
For a CRM with a check source, check
						source counting shall be documented and completed with that check source prior
						to each test.
(4)
Routine
						instrument checks.
Before and after each measurement, the CRM shall be
						checked according to the manufacturer's instructions. For each check, all of
						the following shall be verified:
(i) The
						correct input parameters and the unit's clock or timer are set
						properly.
(ii) The pump's flow
						rates are within the range of the manufacturer's specifications.
(5)
Data collection
						log.
(i) CRM data shall be tracked
						on a form that contains all of the following:
(A) The CRM serial number.
(B) The exposure dates and times.
(C) The test result.
(D) The address of the building
						tested.
(E) The test location in
						the building.
(F) The name of the
						tester who placed the CRM.
(G) The
						name of the tester who retrieved the CRM.
(H) The calibration, repair and Department
						listing dates.
(ii) For a
						CRM without a check source, the data collection log must also contain all of
						the following intercomparison measurement information:
(A) The intercomparison devices' serial
						numbers.
(B) The RPD
						value.
(C) The intercomparison
						measurements results.
(6)
Intercomparison
						measurements.
An intercomparison measurement shall be performed for
						each CRM without a check source.
(i)
						Intercomparison measurements shall be made at least every tenth test with
						another Department-listed passive device that is analyzed by a
						Department-certified laboratory or with another CRM with a hard copy printout.
						The intercomparison measurements shall be distributed systematically throughout
						the entire population of test locations. Original printouts or
						Department-certified laboratory results, or both, shall be kept for each
						intercomparison. Each intercomparison measurement must be performed with the
						devices side by side for the measurement for at least 48 hours.
(ii) For intercomparison measurements, the
						RPD shall be used to track performance. The RPD value shall be tracked using
						control charts from "Protocols for Radon and Radon Decay Product Measurements
						in Homes," EPA 402-R-92-003, May 1993, Appendix B, Exhibits B-2 and
						B-3.
(iii) If the RPD value exceeds
						the control limit, the CRM may not be used for radon measurements until the
						problem is identified and corrected. If the RPD value exceeds the warning
						level, the criteria in "Protocols for Radon and Radon Decay Product
						Measurements in Homes," EPA 402-R-92-003, May 1993, Appendix B, Exhibit B-5,
						shall be followed.
(iv) In addition
						to the control charts, intercomparison measurements shall be documented on the
						CRM data collection log.