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Part 2: What do property owners need to know about indoor air AEPMMs?

Part 2: What do property owners need to know about indoor air AEPMMs?

There are multiple stages to installing an Active Exposure Pathway Mitigation Measure (AEPMM) to mitigate vapor intrusion conditions: engineering, installation, and maintenance. When looking to install an AEPMM to manage indoor air quality at your property, whether commercial or residential, we recommend choosing a company that has years of experience in all three areas of this process.

A properly designed AEPMM will rely on data that is collected at your property; as not all buildings or sub-surfaces are the same, and transmissivity conditions are project specific.  The system’s main component, the blower(s), should be sized based on not only sub-slab soil communication testing, but also on cost considerations. Not all blowers are created equally, and that is why manufacturers supply us with blower performance curves. Knowing which blowers will adequately get the job done, without being oversized or over-stressed, extends blower motor life expectancy, reduces material and operating costs, and overall just saves you money. Building construction and the availability of certain types of power also are key aspects to AEPMM design. The type of forward thinking Cooperstown incorporates into its AEPMM projects also adds value. Preliminary information collected in the field during system design can later be incorporated into your Operation and Maintenance (OMM) plan, so there is a way to assess the functionality of the system quickly and adequately when future monitoring is required.

Once engineering and design of the system is complete, installation of the system becomes a hurdle for many firms, and often consultants subcontract the install of AEPMMs to radon mitigation companies. We feel that property owners are served best by continuity between the design and installation teams. A firm that can perform both these tasks results in a smoother installation process and fewer unexpected costs. It is also important that the installer possess the nimbleness to address unanticipated complications, if they arrive. Members of our staff have been installing and designing SSDSs for years in both commercial and residential settings, and knowing what to expect makes a difference.

Whoever designs and installs your system should provide you with an Operation and Maintenance (OMM) plan. A good sub-slab depressurization installation firm will stay up to date with the current regulations for AEPMMs, and invest in the science surrounding vapor intrusion through continued education.

Cooperstown Environmental LLC is a leading expert in the analysis of site contamination and design, implementation, and operation of SSD systems. Our employees have significant, real-world experience; serve in leadership positions in the professional industry groups, and consult with the MassDEP and other industry colleagues on the latest practices. Cooperstown’s subject matter expert is Isaac Anderson, an acknowledged authority in the field who has provided numerous presentations to explain various aspects of AEPMMs and Telemetry.

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