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MassDEP solicits practitioner input on operating regimens for vapor‑intrusion mitigation systems
Summary
Massachusetts Department of Environmental Protection staff held extended office hours to gather feedback on draft guidance for operating regimens that govern active pathway mitigation systems (APAMs) used to control vapor intrusion. Key practitioner concerns included telemetry design, subslab probes, monitoring frequency, cost burdens for immediate response actions, and periodic professional re‑inspection.
The Massachusetts Department of Environmental Protection convened an extended office‑hours session to gather technical input as it drafts guidance for operating regimens that govern active pathway mitigation measures (APAMs) — primarily systems addressing vapor intrusion — under the Massachusetts Contingency Plan. Millie Garcia Serrano, assistant commissioner for the Bureau of Waste Site Cleanup, said the guidance is intended to ensure APAMs maintain a level of No Significant Risk (NSR) over the foreseeable future.
Brian Rhoden, acting division director for the policy and planning division, reminded attendees that MassDEP sent APAM annual certification letters on March 12 to 85 permanent solutions and asked owners to return a two‑page form documenting a shutdown/restart test intended to verify telemetry. “The telemetry was installed by whoever was the previous owner; we’re not in control of that,” Rhoden said, urging property owners to take responsibility for telemetry access and contact information.
Practitioners, many of them Licensed Site Professionals (LSPs), raised technical and…
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