https://www.radonlistserv.org/categories/3/rn-measurement/feed.rss Sun, 17 May 2026 11:43:39 Z Rn Measurement - Radon ListServ en https://www.radonlistserv.org/discussion/324/outdoor-radon-levels-in-central-fl Tue, 02 Dec 2025 21:25:43 Z Bill Brodhead 324@/discussions Has anyone measured outdoor radon levels in Central Florida? Im in the Ocala area and happen to have a radon monitor in my travel trailer camper. The camper sits 18 inches above the ground and early every morning radon levels inside my camper rise to 7 pCi/L. https://www.radonlistserv.org/discussion/323/rs300 Mon, 29 Sep 2025 18:47:39 Z dcasciato 323@/discussions Are testers still using the RadonAway RS300 CRM? What do you like/dislike about this unit? What can go wrong with it? https://www.radonlistserv.org/discussion/322/radioactive-mattresses Wed, 11 Jun 2025 13:29:36 Z Henri Boyea 322@/discussions Well, here is something I never thought to test for! Radon Certifications for Mattresses Somebody please get this Cho Seung-yeon to speak at Symposium! https://www.radonlistserv.org/discussion/315/elevation-influence-on-radon-monitors Tue, 08 Oct 2024 18:14:11 Z Bill Brodhead 315@/discussions I am testing how pulse ion radon monitors are influenced by the elevation they are used at. I have two small radon chambers that have been exposed at 300 feet and 5000 feet of elevation already. The next test will be at 7000 feet. Is there any Tester, Mitigator or willing homeowner who lives at an... https://www.radonlistserv.org/discussion/303/nrpp-measurement-exam-is-unavailable-at-this-time-until-october Mon, 07 Aug 2023 14:33:01 Z Michelle Festa 303@/discussions This was omitted from the recent AARST email newsletter, and the listserv. This is from the NRPP website. NRPP Exam Security Update: Last Update: July 17, 2023 NRPP was recently made aware of a breach in the security of the RMP (Radon Measurement Professional) and RMFT (Radon Measurement Field... https://www.radonlistserv.org/discussion/294/radon-in-water-mystery Tue, 03 Jan 2023 19:14:32 Z Henri Boyea 294@/discussions Any good explanation for these discrepant measurements of radon in the same well? 194,000 pCi/L in Aug. Home inspector at sink. Single sample. House vacant. 30,000 a week later. Radon pro at wellhead. Two sample avg. House vacant. 169,000 early Dec. Radon pro at wellhead. Two sample avg. House... https://www.radonlistserv.org/discussion/295/rn-in-water Thu, 29 Dec 2022 16:35:57 Z andreas george 295@/discussions The low reading of 30,000 pCi/l is suspect if the water tank was not purged to bring fresh water from the well. Because the house was vacant for several days the water in the tank probably decayed by 2-3 half lives resulting in the low reading Andy George. https://www.radonlistserv.org/discussion/202/favorite-crms Tue, 22 Mar 2022 12:49:18 Z Jessica Hammons 202@/discussions Hello! We currently have a large quantity of Sun Nuclear 1027 and 1028's. This year we want to upgrade those units and i'd love some real life feeback on one's you like and or aren't a fan of. As you know these units are a big expense and i'm trying to gather as much info as possible before moving... https://www.radonlistserv.org/discussion/262/monitor-placement-location Wed, 18 Aug 2021 14:50:00 Z Wally Dorsey Jr 262@/discussions May I burden this group with an opinion on whether this radon monitor placement location meets ANSI/AARST Protocols or the older EPA Protocols? Thanks very much in advance, Wally Dorsey https://www.radonlistserv.org/discussion/254/multifamily-retesting Wed, 14 Jul 2021 00:51:08 Z Henri Boyea 254@/discussions We are working on a measurement/mitigation project for public housing complexes.I found the guidance in the ANSI-AARST standards a bit unclear regarding which Units should be retested post-mitigation; all, or only those mitigated. Shawn Price cleared that up for me and pointed out that per the... https://www.radonlistserv.org/discussion/242/boulder-county-short-term-dwelling-rentals-and-vacation-rentals-radon-testing-requirement Wed, 10 Feb 2021 17:24:10 Z Chrystine Kelley 242@/discussions Hi everyone- I am happy to announce that thanks to the efforts of the Boulder County Public Health (BCPH), unincorporated Boulder County now requires radon testing by certified radon measurement contractors in all Short Term Dwelling Rentals and Vacation Rentals. Ordinance #2020-01 Section 6 A 2x... https://www.radonlistserv.org/discussion/235/old-post-mitigation-national-survey Tue, 27 Oct 2020 00:11:33 Z Deleted User 235@/discussions Does anyone recall a large post mitigation radon survey (using yearlong follow-up ATDs) that was completed to assess the home radon concentration years after the mitigation was performed. The survey was at least 20 years ago and I thought it may have been coordinated by AARST? https://www.radonlistserv.org/discussion/227/radon-and-phase-i-environmental-site-assessments Mon, 14 Sep 2020 12:53:38 Z Scott Cryer 227@/discussions Wondering if any of you have seen a Phase I ESA where the recommendations included radon testing. We don't see it too much up here in Canada and that's likely because most feel it may derail any deal associated with the report and/or Clients will not hire them again to do other Phase I's. However... https://www.radonlistserv.org/discussion/219/latest-rad-elec-software-version Tue, 18 Aug 2020 14:09:58 Z dcasciato 219@/discussions Can anyone tell me what the latest version of the Rad Elec Software for the e-Perm system is? Thanks in Advance - Dan https://www.radonlistserv.org/discussion/228/mfmt-contract-form Thu, 13 Aug 2020 01:13:32 Z Chris Herman 228@/discussions I am looking for a good contract that anyone has/uses for performing multi-family measurements in large buildings. I can't find anything on the AARST website that would work. I have a new construction 53 unit senior living building that has RRNC built-in needing testing (20 test in total.) If... https://www.radonlistserv.org/discussion/222/comparison-of-consumer-radon-monitoring-devices Sat, 06 Jun 2020 15:01:52 Z ReveAnn Ellrott 222@/discussions This Canadian study comparing consumer radon devices came across my inbox today... https://www.radonlistserv.org/discussion/208/radon-testing-hygiene-protocol-in-times-of-covid-19-coronavirus-and-similar-contagions Fri, 20 Mar 2020 01:02:30 Z Shawn Price 208@/discussions Michael LaFontaine has allowed me to post this excellent paper that details important, yet easily implemented steps to protect the health and safety of radon professionals, our clients, coworkers, and laboratory staff. While the emphasis is on current COVID-19 Pandemic, the procedures are relevant... https://www.radonlistserv.org/discussion/186/photos-of-alpha-track-deployment Tue, 29 Oct 2019 18:22:13 Z dcasciato 186@/discussions I am trying to figure out the options for Alpha Track deployment. Do we hang the device from the ceiling? Place on a piece of furniture with the same clearance distances as an Activated Charcoal device? Any photos of a deployed AT device would be helpful - Thanks in Advance - Dan https://www.radonlistserv.org/discussion/177/large-building-testing-letter-templates-for-employees Wed, 17 Jul 2019 19:21:50 Z Chrystine Kelley 177@/discussions Does anyone have a template letter to give employees about radon testing in the workplace? I thought there were some letter templates on the AARST site, but I can't find them. Thanks- Chrys https://www.radonlistserv.org/discussion/167/niosh-calsbad-study Fri, 07 Jun 2019 20:15:47 Z Chrystine Kelley 167@/discussions https://www.currentargus.com/story/news/local/2019/06/01/radon-found-carlsbad-caverns-park-service-looks-prevent-exposure/1304780001/