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My question is, what standards do you use? Why are some of your CPM readings so much higher than what I'm reading?
First, the EPA's webpage says "100 rems" not 100 CPM. Rems is a dose rate and CPM is just a count of all radiation hiting the unit. Netc.com does not set a standards for radiation, that is not our function. Netc.com server is an early warning radiation service that collects the data from each station and calculates the NORM background radiation level and sets alert levels called RADCONs to tell when the radiation is rising at the station, from its historical levels of radiation.
Different equipment causes different readings and Netc.com does not use the radiation levels, it uses the different between the calculated NORM background radiation for that station vs Current radiation value for that station.