Radon Mitigation Before & After Photos

In this before and after we took an old aeration system, and replaced it with a Granulated Activated Carbon System (GAC).

CT Radon and Well Water Solutions was called out to a home in Norwalk CT to investigate a house that was built entirely on a dirt crawl space. Elevated radon levels of 10+ pCi/l were recorded in multiple living areas over the crawl space.

We went out to the home and found that the house was built entirely over exposed dirt crawl spaces.

CT Radon and Well Water Solutions was hired to mitigate the property. We installed a cross-laminated poly vapor barrier over the entire dirt floor footprint. We then installed suction pipes through the barrier and routed them to the home's exterior where we connected an in-line fan to the pipe network to create suction under the barrier and expel the soil gas outdoors above the roofline. Post-mitigation testing revealed results of < 1.0 pCi/l in all living areas.

Homeowner had elevated waterborne radon and uranium concentrations in their well water. We installed a Bubble Up Interactive system with a 1 hp VFD repressurization pump and anion exchange system. The Bubble Up will deliver "city like" water pressure to all points of use in the home simultaneously. The anion exchange will very effectively remove the uranium from the well water on a "whole house" basis so all points of use are treated. We also replaced their old water softebner with a new Clack WS1 digital metered water softener.

This home had an old aeration system that was problematic. The system had reached a service life where multiple things were going wrong and repairs were going to be costly. The owner inquired about GAC (granular activated carbon) as an alternative. The non-mechanical, no operational noise aspect of GAC was appealing to them. We explained that while aeration was the "best available technology" (BAT) for waterborne radon removal, GAC can be an option depending on radon concentrations. After several confirmatory tests, we determined that GAC would be an applicable technology for this particular home.

We removed the old aeration system and installed the GAC tank with pre and post sediment filters (a feature many of our competitors don't do), along with an up flow acid neutralizer. The customer is thrilled with the results and has great quality water.

Active Soil Depressurization (ASD) or Sub Slab Depressurization (SSD) can also workin concert with a waterproofing system. Sump suction, or sub slab sump suction can be very effective in lowering airborne radon concentrations provided that the water level under the slab isn't above the lateral pipe network under the slab.

An interior footing drain system consists of perforaed pipe in a bed of gravel that runs along the footing inside the basement footprint. It typically dumps into a sump basin where the sump pump is located. This perforated pipe and gravel channel can help move a lot of air out from under the slab when we tap our suction point near it. Tapping into the actual sump is not necessary.