So I passed my Advanced Radon course here online, but now I see that I need to register with ARST or the NRSB and take their courses and test as well to become certified in CA. Do I have this right? if so, do you CA HI’s have a CA cert for radon? is it worth it? My business is in Contra Costa County, we’re a level 2 risk for Radon and there are only a few radon testing companies in my area…
Any feedback and/or advice would be greatly appreciated. Thanks again in advance!