The Department adopted the Indoor Air Notification Area (IANA) in February 2026, establishing a new institutional control called an “Indoor Air Notification Area,” which addresses the indoor air/vapor intrusion exposure pathway. Regulatory citations applicable to Indoor Air Notification Areas are in the Administrative Requirements for Remediation of Contaminated Sites  (ARRCS) at N.J.A.C. 7:26C-7.5 and the Technical Requirements for Site Remediation  at N.J.A.C. 7:26E-5.7.

ARRCS at N.J.A.C. 7:26C-7.5 explains how an IANA serves as notification to the public, that air inside a building on a site is above the applicable remediation standards, and that it requires mitigation and monitoring to ensure that any occupants of the building are protected. Similar to a Classification Exception Area (CEA), the IANA is part of the Remedial Action Permit (RAP) and a Geographic Information System (GIS) layer for the IANA will be mapped on the Department’s website. An IANA requires data evaluations, mapping, and notification to ensure that people in a building are aware that there is a potential exposure risk if an engineering control is not being operated or maintained. When the Person Responsible for Conducting the Remediation (PRCR) or permittee (if in an approved RAP) proposes or revises an IANA, the PRCR or permittee must notify municipal officials, health departments, county planning boards, and nearby real property owners, tenants, and occupants.

N.J.A.C. 7:26E-5.7 requires the PRCR to include the indoor air notification area, which reflects current site conditions for the area of the indoor air contaminated by a discharge at the site, in the remedial action report submission. Pursuant to N.J.A.C. 7:26C-7.5, the Department may revise or reestablish an IANA at any time to more accurately reflect indoor air conditions using any relevant data, as the duration of the IANA is indeterminate.

Contact the Bureau of Remedial Action Permitting (BRAP) at (609) 633-6801 with any indoor air RAP questions.

Contact the BEMSA ICU case manager (or the BCM case manager for traditional oversight and certain direct oversight cases) with IANA questions.

https://dep.nj.gov/srp/guidance/iana/