radon foundation access

https://theradonmitigationcosttips.cloudhinter.com/posts/understanding-radon-mitigation-cost-what-affects-the-price-of-a-system

The concrete foundation in the basement has a hairline crack along the northeast corner, and the radon test kit I left for three days came back with readings that are just under the EPA action level. Because I know levels fluctuate with weather and seasons, I'm researching whether to install a sub-slab depressurization system or just seal the crack and test again. Accessing that area means moving stored boxes and clearing a path to the sump pump, which I'd need to do anyway if I hire someone to…