1. Building inventory
Every ground-contact space
Count units, offices, classrooms, retail, storage, maintenance, mechanical, crawl-space, and slab areas that are occupied or communicate with occupied space.
Commercial · multifamily · mixed-use
Commercial Radon Testing in Los Angeles County, CA
Do not buy a one-room test and call the building cleared. Start with a written measurement plan that identifies every ground-contact occupancy, the required upper-floor sample, quality-control devices, access windows, and the report each location will receive.
Scope before devices
What the proposal must define
2. Measurement protocol
The standard and sample plan
Name the current ANSI/AARST standard, test duration, closed-building conditions, upper-floor sampling, duplicates, blanks, spikes, and device custody.
3. Occupant operations
Access and tamper control
Define tenant notices, room access, HVAC operation, device protection, after-hours entry, invalid-test handling, and who documents deviations.
4. Report and next bid
Results by location
Require a floor plan, device log, location result, QA record, retest rule, and a separation between measurement findings and any mitigation proposal.
California verification
Certification is part of the scope
CDPH states that radon service providers operating in California must be approved through the recognized national certification programs. Confirm the tester and the expiration date before relying on transaction, school, multifamily, or non-residential results.
County context
Use local data to justify testing—not to clear the building
Los Angeles County, CA is measurement-backed for 2008-2017. The measured average is 1.9 pCi/L, and 9.5% of reported results are at or above 4.0 pCi/L. The high-end signal reaches 363.7 pCi/L.
Official signal
1.9 pCi/L
County or ZIP evidence cannot predict a specific office, school, apartment, warehouse, or retail space. The building measurement plan controls the decision.
Open Los Angeles County evidence →Copy this into the request for proposal
Please provide a commercial radon measurement plan for our Los Angeles County property. Identify the applicable standard, every ground-contact and upper-floor test location, device and QA counts, closed-building requirements, access assumptions, invalid-test handling, reporting by location, current California certification, and a separate price for any follow-up diagnostics or mitigation design.