4/28/2011 -- Radiation Test -- RAIN WATER -- Saint Louis, Missouri -- 46.0 CPM

This measurement was made on April 28th, 2011 at approx. 845am CST. It indicates "normal" or "acceptable" radiation levels. Alert level is considered anything over 100CPM by the radiation network ... www.radiationnetwork.com First background measurement, taken over the course of 10 minutes was 50.4 CPM. Second Background measurement over the course of 10 minutes was 47.2 CPM. The third OFFICIAL CPM, for this rain water, after measuring background, came to 46.0 CPM. ************* statistics Total 10 minute count = 460= 46.0 CPM Location: Saint Louis, Missouri Coordinates : 38 36 6 N , 90 15 50 W Elevation : 527 feet Measurement taken: 4 ten mintue long CPM measurements using using the "inspector alert" nuclear radiation monitor (geiger counter) from the inspector alert geiger counter manual: "CPM (or CPS) and total counts are the most direct methods of measurement; mR/hr (or uSv/hr) is calculated using a conversion factor optimized for Cesium-137, so this mode is less accurate for other radionuclides, unless you have calibrated the "geiger counter" for a specific radionuclide using an appropriate source. It is more appropriate to measure alpha and beta activity using CPM than using mR/hr. Conversion for alpha and beta emitters is calcuated differently, and the "geiger counters" reading in mR/hr may not be accurate."

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YouTube | April 28, 2011

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