Calibrated Continuous Monitors · 48-Hour Hourly Data · EPA Action Protocol · Southwest Washington

Radon Gas Testing

Continuous radon testing for actionable indoor air safety

Professional Radon Gas Testing by JIT Inspections utilizes calibrated electronic Continuous Radon Monitors (CRM) deployed for 48 hours under closed-building conditions. Serving Lewis, Thurston, Pierce, and Cowlitz counties, we measure hourly indoor radiation levels against the EPA 4.0 pCi/L action threshold to verify family safety before closing.

⚡ 7-Day Scheduling · Short-Notice & Weekend Openings Welcome

Schedule inspection 📞 Call / Text (360) 767-2211 Pricing FAQs

Continuous electronic radon gas testing monitor in residential basement

EPA-calibrated 48-hour continuous radon testing measuring indoor environmental safety.

Quick Technical Specs

Testing Duration: 48-Hour Continuous Monitor Deployment
Equipment Type: Professional Continuous Radon Monitor (CRM)
EPA Action Level: 4.0 pCi/L (Mitigation Recommended)
Bundle Pricing: $200 with inspection ($259 standalone)
Data Precision: Hourly readings with tamper, temp & pressure sensors
Report Delivery: Digital report immediately following 48-hr pickup

Included in Scope

What we inspect

Every inspection follows strict Washington State Standards of Practice (WAC 308-408C). Our visual evaluation covers all readily accessible elements:

Placement of calibrated continuous radon monitor in lowest livable area per EPA protocol
Verification of closed-building test conditions (windows/exterior doors closed)
48-hour continuous hourly measurement of radon gas concentrations (pCi/L)
Tamper-detection monitoring including barometric pressure, temperature, and motion sensors
Comprehensive digital report with hourly charts, average concentration, and EPA risk guidance

Scope Boundaries

What requires a specialist

To provide honest, professional clarity, we clearly delineate where a home inspection ends and where dedicated trade contractors or municipal utilities are required:

Short-term passive charcoal canister tests (we only use active CRM monitors)
Active physical installation of radon mitigation fans (testing only to ensure impartiality)
Well water radon concentration testing (airborne testing only)

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Radon Risk in Southwest Washington

While Western Washington is historically viewed as having moderate radon potential, localized pockets of high radon occur throughout Lewis, Thurston, Clark, and Pierce counties due to gravel glacial deposits and river-bed soils. Because neighboring houses can test drastically differently due to soil permeability and foundation cracks, testing is the only way to verify safety.

Tailored Protection

Who this service protects

Whether you're buying your first home, preparing to list, or guiding a client, we provide objective clarity tailored to your goals.

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For Home Buyers

Avoid buying a money pit. We uncover hidden crawlspace rot, obsolete electrical panels, aging roofs, and sewer blockages before your contingency period expires, giving you the photographic evidence you need to negotiate repair credits or price reductions.

✓ Defend your earnest money deposit

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For Home Sellers

Eliminate 11th-hour deal cancellations. Identify defects before going to market so you control repair costs, hire your own trusted contractors, and price your home accurately with zero surprises on closing day.

✓ Fast, clean closing with fewer renegotiations

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For Real Estate Agents

Enjoy 7-day responsive scheduling, calm objective explanations, and plain-English reports delivered within 48 hours (same-day rush available). We prioritize safety and major repair items without causing unnecessary alarm for your clients.

✓ Clear summaries that keep transactions moving

Transparent Process

How it works from booking to report

Fast online booking

Call, text, or schedule online. Upfront pricing with no surprise travel fees. 7 days a week.

Thorough on-site work

Zach conducts an unhurried, disciplined 2.5–3.5 hour evaluation from roof to crawlspace.

Actionable 48-hr report

Receive your prioritized digital report complete with high-res photos, video, and categorized findings.

Post-inspection consult

Direct follow-up consultation to help you understand findings, contractor quotes, and repair addenda.

Verified Client Reviews

Trusted by Southwest Washington Homeowners

★★★★★5.0 Rating from verified Google reviews

★★★★★

✓ Google Verified

"JIT inspections were fantastic! Zak arrived when he said and immediately began the inspection. He was efficient, professional and friendly. Zak also provided a “wrap up” to the inspection, which was extremely helpful. I would highly recommend JIT Inspections to anyone wanting a well done experience."

Shannon Archbold2026-08-18

★★★★★

✓ Google Verified

"Zach was very thorough regarding home inspections. I am certainly going to use him when I find my home."

KC Armour2026-09-01

★★★★★

✓ Google Verified

"Zach, owner of Just In Time Inspections, provided excellent, quick and accurate inspection of my home. I thought I might have a water leak. He used his high tech equipment to assess the area and provided both great verbal discussion during the inspection and a written report soon afterwards. Highly recommended!"

Douglas Parrish2026-09-11

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Veteran-Owned

Disciplined, thorough process

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WA State Licensed

License #26014533 (WAC 308-408C)

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100% Independent

We work exclusively for you

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Fully Insured

Errors & Omissions + General Liability

Support that stays useful

Questions rarely end when the inspection finishes. Zach is available by phone or text after you review the report to help you understand findings, prioritize contractor quotes, and prepare your inspection response.

Call or text: (360) 767-2211

Bundle & save on add-ons

Combine this service with a Sewer Scope (+$230), Radon Testing (+$200), or Thermal Imaging (+$175) for complete peace of mind and save significantly compared to standalone pricing.

Inquire about package savings →

Answers to Common Inquiries

Frequently asked questions about Radon Gas Testing

Direct, transparent answers to help you make informed decisions before scheduling.

What is radon gas and why is it dangerous?

Radon is a naturally occurring radioactive gas produced by the breakdown of uranium in soil and rock. It is odorless, tasteless, and invisible. When radon gas enters homes through foundation cracks and crawlspaces, it accumulates indoors. The EPA and Surgeon General identify radon as the second leading cause of lung cancer in the US.

What is considered a dangerous radon level in a home?

The EPA recommends taking corrective action (installing a mitigation system) if the average indoor radon concentration tests at or above 4.0 picocuries per liter (pCi/L). The EPA also advises considering mitigation for levels between 2.0 and 4.0 pCi/L.

How does your continuous monitor differ from store-bought test kits?

Hardware-store charcoal test kits are passive and must be mailed off to a lab, introducing delays and vulnerability to transit temperature extremes. JIT uses professional electronic Continuous Radon Monitors (CRM) that record hourly data points, detect intentional tampering or open windows, and provide immediate results upon completion of the 48-hour test.

What are closed-building conditions during testing?

EPA protocol requires closed-building conditions: all windows and exterior doors must remain closed for the 48 hours of testing (normal entry and exit through exterior doors is permitted). Normal HVAC operation is maintained, but whole-house fans or open-window ventilation must be suspended.

Can radon be fixed if the test comes back elevated?

Yes. Radon is very manageable to fix. Standard active sub-slab depressurization mitigation systems (which vent radon gas from under the foundation safely above the roofline) typically cost between $1,500 and $2,500 in Western Washington.

How much does radon testing cost?

Radon testing is $200 when added to a full home inspection, or $259 when ordered as a standalone service.

Regional Coverage

Where We Perform Radon Gas Testing Services

Fast dispatch across Southwest Washington with zero surprise travel surcharges:

Olympia, WA

Thurston County Hub · Historic & New Construction

Tacoma, WA

Pierce County · Vintage Craftsmans & Sewer Scopes

Puyallup, WA

East Pierce County · Valley Foundations & Crawlspaces

Centralia, WA

Lewis County · Historic Homes & Outbuildings

Chehalis, WA

Lewis County · Rural Properties & Structural Inspections

Longview, WA

Cowlitz County · Timberland & Riverfront Properties

Thurston County

Lacey, Tumwater, Yelm, Rochester

Pierce County

Gig Harbor, Lakewood, University Place

View All Service Areas →

Counties, Municipalities & Boundary Maps

REQUEST AN INSPECTION

Request Your Inspection in Southwest Washington

Tell us about the home and your timing below. We will confirm your appointment and your exact price quickly. Working against a tight closing deadline? Call or text (360) 767-2211 for same-day, next-day, or weekend openings.

What happens next?

1
Submit property details
Enter the address, approximate square footage, and your preferred dates in the form.
2
Fast quote & date confirmation
Zach reviews the schedule, confirms your time slot, and locks in your exact upfront price.
3
Walkthrough & 48-hour report
Attend the on-site walkthrough and receive your photo-rich interactive digital report within 48 hours.

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Call or Text Zach Directly

(360) 767-2211

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Email Zach Directly

zach@jitinspects.com

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7 Days a Week Availability

Short-notice, next-day, and weekend openings accommodated whenever possible.

View reviews, photos & hours on Google