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Applicability Determination Index

The general provisions of 40 CFR Parts 60 and 61 allow a source owner or operator to:

request a determination of whether a rule applies to them (applicability determinations); or
seek permission to use monitoring or record keeping which is different from the promulgated standards (alternative monitoring).

To ensure national consistency in implementing the NSPS and NESHAP programs, EPA maintains a compilation of such letters and memoranda since they were first issued. This compilation is currently available on the Applicability Determination Index (ADI) database Web site. The ADI also contains “regulatory interpretations” which are written responses that apply to the broad range of NSPS and NESHAP regulatory requirements as they pertain to a whole source category. The ADI is a computerized database which allows users to search by date, office of issuance, subpart, citation, control number, or keyword searches.

The information contained in this site is provided for your review and convenience. It is not intended to provide legal advice with respect to any federal, state, or local regulation.
You should consult with legal counsel and appropriate authorities before interpreting any regulations or undertaking any specific course of action.

Please note that many of the regulatory discussions on STERC refer to federal regulations. In many cases, states or local governments have promulgated relevant rules and standards
that are different and/or more stringent than the federal regulations. Therefore, to assure full compliance, you should investigate and comply with all applicable federal, state and local regulations.