ANSI/AARST SGM-MFLB-2023 COMPLIANT
Multifamily and Large Building Soil Gas Mitigation
Professional mitigation for Multifamily, Schools, and Commercial assets. We provide engineered solutions compliant with the latest 2023 national standards for soil gas intrusion.
Advanced Soil Gas Engineering
The ANSI/AARST SGM-MFLB-2023 standard has changed the landscape for radon mitigation in large buildings. It is now the required benchmark for properties pursuing HUD-insured financing or major capital improvements.
"Large buildings behave differently than single-family homes. Shared walls, stacked units, mechanical systems, and mixed-use layouts all influence how soil gases move through a structure. We design systems that account for these real-world conditions, not just textbook theory."
Rn86 Solutions specializes in designing and installing mitigation systems that meet this standard with confidence. Whether you are preparing for refinancing or acquisition, we deliver strategies built for complex properties.
2023 Compliance Checklist
- ✔ PFE Diagnostics: Pressure Field Extension testing.
- ✔ Sealing & Vapor Barriers: Advanced membrane solutions.
- ✔ O&M Requirements: Mandatory facility documentation.
- ✔ Standard Adherence: Compliant with SGM-MFLB-2023.
Engineering Objectives
Level Reduction
Consistent reduction of soil gas levels below the 4.0 pCi/L EPA action level.
HVAC Integration
Ensuring ASD fans operate in harmony with existing mechanical air handling systems.
PFE Verification
Utilizing digital micromanometers to verify vacuum coverage across the entire footprint.
Structural Integrity
Maintaining fire-ratings and the building envelope through code-compliant penetrations.
Tenant First
Professional unit-entry protocols and scheduling to minimize resident disruption.
Compliance Support
Generating the certified O&M manuals required for HUD MAP and financing.
Multifamily and Large Building Protocol
Multi-Zone ASD
We design multi-point suction systems to manage large footprints and varying foundation types.
Commercial Grade Fans
Installation of high-efficiency, weather-protected fans engineered for 24/7 commercial operation.
O&M Manuals
Providing the mandatory Operations, Maintenance, and Monitoring plan for facility management.
System Monitoring
Installation of permanent, tamper-resistant vacuum monitors and audible alarms.
Verification
Rigorous post-mitigation testing to confirm the building has been successfully remediated.
Tenant Protection
Strict adherence to unit-entry protocols and tenant safety notifications during installation.
Mitigation & Compliance FAQ
Which standards do your mitigation systems follow?
Every commercial project we undertake is designed and installed according to the ANSI/AARST SGM-MFLB-2023 standard. This is the current national benchmark for soil gas mitigation in existing multifamily, school, and commercial buildings, ensuring your system is federally compliant and defensible for future audits.
Will the mitigation systems impact the building's curb appeal?
We prioritize aesthetic integration. For large buildings, we often utilize internal utility chases or rooftop fan placements to keep the system out of sight. When exterior routing is required, we use professional-grade materials that can be color-matched or painted to your building's facade to minimize visual impact.
How do you maintain fire-rated assemblies during installation?
Maintaining the structural integrity of your asset is non-negotiable. Our team is trained to use UL-listed fire-stopping materials for every floor or wall penetration. We ensure that your building's fire-rated barriers remain fully intact and compliant with local fire codes.
How will we know if the system stops working?
In accordance with the 2023 standards, we install permanent visual and/or audible system monitors (manometers or digital alarms). These provide your facility team with an immediate alert if the system loses pressure, allowing for rapid response to maintain tenant safety.
Do we need to re-test after the system is installed?
Yes. Professional verification is a core requirement of the SGM-MFLB-2023 protocol. We conduct post-mitigation testing to prove the system is effectively reducing radon levels below the 4.0 pCi/L threshold before we issue the final certificate of completion.
Tennessee's Large Building Experts
Contact Rn86 Solutions for SGM-MFLB-2023 compliant bids on apartment complexes, schools, or commercial properties.