Case Study 34-2: Dave Kowalski and Radon — The Test That Changed Everything
Dave Kowalski had worked from home for almost six years when his neighbor Jim mentioned, in the middle of a conversation about something else entirely, that the county extension office had been distributing free radon test kits.
"Apparently the county has high radon," Jim said. "Geological thing. They want people to test."
Dave had never heard of radon. He looked it up that evening. What he found made him stop and reread it twice.
Radon: colorless, odorless, radioactive gas. Second leading cause of lung cancer in the United States. Enters through foundation. Accumulates in basements. EPA action level: 4 pCi/L.
Dave worked in his basement office. Monday through Friday. Eight to ten hours a day. For six years.
"I went to sleep thinking about it," he said. "Which isn't helpful. But that's what happened."
The Test
He picked up the free kit from the extension office the next morning. The kit was a small cardboard tube containing a plastic canister — a passive alpha track detector. The instructions were four steps:
- Place in the lowest level of the home that is used regularly.
- Do not place near drafts, high-humidity areas, or exterior walls.
- Close all windows and exterior doors 12 hours before and during the test period.
- After 90 days, place in the return envelope and mail to the laboratory.
Dave placed it on his desk, in the center of the room, about three feet above the floor. He set a calendar reminder for 90 days.
He kept working.
The Result
Ninety-two days later, he mailed the canister to the laboratory. Results arrived by email two weeks after that.
Indoor radon level: 8.2 pCi/L.
Dave sat with that number. He understood what it meant. He'd been reading about radon since Jim's casual comment — he'd become, in the way that people do when something catches their attention, quietly obsessed with it. He knew that 8.2 pCi/L was more than twice the EPA action level. He knew the EPA's risk estimate: at 8 pCi/L, approximately 21 lung cancer deaths per 1,000 people with lifetime exposure. He knew that "lifetime exposure" in the risk tables assumed years of continuous occupancy.
He'd been doing continuous occupancy. In a basement. For six years.
"It's not a death sentence," he said, "and I understood that rationally. But it was real information about real risk, and I was sitting in the room where the risk was highest. That concentrates the mind."
He moved his laptop to the kitchen table that afternoon. He kept working from there while he arranged for mitigation.
The Mitigation Process
Dave contacted three state-certified radon mitigators. Two responded promptly; one never returned his call.
The first contractor to assess the basement identified the likely issue quickly: Dave's basement was a poured-concrete slab-on-grade construction, but there was no aggregate layer beneath the slab — just concrete on soil. Without a permeable layer under the slab for a sub-slab depressurization system to work through, the standard SSD approach needed modification.
The contractor's solution: an interior drain tile system — a small trench cut in the concrete perimeter, filled with aggregate, connected to a sump pit, and tied into a radon pipe routed up through the wall and out through the rim joist to a fan mounted outside.
The second contractor proposed the same general approach but with a slightly different routing — through the wall to an exterior-mounted fan versus the first contractor's interior fan in the mechanical room.
Dave chose the second contractor based on the exterior fan placement, which the contractor explained would make future fan maintenance simpler and would keep any fan noise out of the basement.
Installation
Installation took one full day. The crew: 1. Cut a 4-inch-wide trench around the interior perimeter of the basement (approximately 140 linear feet) 2. Filled the trench with 1.5-inch crushed aggregate 3. Installed a 4-inch PVC manifold pipe in the trench 4. Ran a 4-inch PVC riser up the wall, through the rim joist, to an exterior-mounted RadonAway fan 5. Connected the fan discharge to a 4-inch pipe extending 12 inches above the sill line and away from any windows 6. Installed a U-tube manometer in the basement to provide a visual indication that the system was operating
The concrete cutting was the most disruptive part — loud, dusty work that took about three hours. The rest of the installation was clean.
The contractor installed the U-tube at eye level on a wall stud:
"If the water in that tube is uneven — higher on one side than the other — the fan is working," he explained to Dave. "If it's level, the fan is off or the system has a problem. You check it once a month the same way you check your smoke detector."
Post-Mitigation Testing
Dave's contractor conducted a short-term post-mitigation test (72-hour charcoal canister) before leaving. The result came back from the lab five days later.
Post-mitigation radon level: 0.7 pCi/L.
From 8.2 to 0.7. A 91.5% reduction.
Dave moved back into his basement office.
"I work down here every day now," he said, "and I check the manometer on the first of every month. The fan is running. The system is working. I feel fine."
The Medical Conversation
Dave had mentioned the high radon result to his physician at his annual physical six months after mitigation. His doctor ordered a pulmonary function test — baseline results were normal — and noted the cumulative exposure in Dave's record.
"He said something useful," Dave recalled. "He said, 'You found out about this, you measured it accurately, you fixed it, and you caught it before symptoms. That's the right sequence.' He said the cumulative past exposure does mean I should be diligent about annual physicals and any respiratory symptoms. But there's nothing to treat — I don't have cancer. I just have a documented risk factor that I'm monitoring."
The Costs
- Long-term radon test (free from county): $0
- Radon mitigation system: $1,680
- Post-mitigation short-term test: $0 (included by contractor)
- Annual operating cost of fan: approximately $45 in electricity
- Total first-year cost: $1,680
Dave's cost breakdown commentary: "A $1,680 investment to address a documented 21-per-thousand lifetime cancer risk that I was accumulating at the rate of 40+ hours a week. That's one of the most straightforward cost-benefit calculations I've ever made."
What Dave Told the Next Neighbor Who Asked
Dave became, in the informal way that homeowners do, something of a local resource on radon. When the family two properties over mentioned they were buying a house with a basement, he told them the story.
"Go get a test kit. Not after you move in. Right now, before you close. Put it in the basement during your inspection period. If it comes back high, you negotiate mitigation into the purchase price. If it comes back low, you know."
The neighbors tested. Their result: 1.8 pCi/L. Below the action level. They closed on the house with documentation and a clear result.
"The test is $15," Dave told them. "For $15, you know. Why would you not know?"
The Broader Observation
Dave's case illustrates several important principles about radon and hazardous materials generally:
Risk can be invisible and cumulative. Dave worked in a basement with 8.2 pCi/L radon for six years and had no symptoms, no indication, no reason to suspect a problem — until he tested. The exposure was real and ongoing. The test made the invisible visible.
The intervention cost is low relative to the risk. A $1,680 mitigation system addresses a documented elevated cancer risk. For a hazard that kills 21,000 Americans annually, this is a remarkably affordable fix.
Testing requires action. A test result that leads to no action is worse than not testing — because you now know and chose not to act. Dave's sequencing was correct: test, confirm the result is above action level, mitigate, retest, confirm mitigation effectiveness, document.
The conversation matters. Jim's offhand mention of free test kits at the county extension office set the entire chain of events in motion. If Jim hadn't mentioned it, Dave might still be working in a basement with 8.2 pCi/L radon. The conversation that changes someone's health trajectory costs nothing.