---
kind: "section"
citation: "40 C.F.R. § 75.40"
title: "40"
number: "75.40"
heading: "General demonstration requirements."
url: "https://uscodex.org/cfr/40/75.40"
---

# §75.40. General demonstration requirements.

- (a) The owner or operator of an affected unit, or the owner or operator of an affected unit and representing a class of affected units which meet the criteria specified in [§ 75.47](/cfr/40/75.47.md), required to install a continuous emission monitoring system may apply to the Administrator for approval of an alternative monitoring system (or system component) to determine average hourly emission data for SO2, NOX, and/or volumetric flow by demonstrating that the alternative monitoring system has the same or better precision, reliability, accessibility, and timeliness as that provided by the continuous emission monitoring system.
- (b) The requirements of this subpart shall be met by the alternative monitoring system when compared to a contemporaneously operating, fully certified continuous emission monitoring system or a contemporaneously operating reference method, where the appropriate reference methods are listed in [§ 75.22](/cfr/40/75.22.md).

## Notes

### Authority

Authority: 42 U.S.C. 7401-7671q and 7651k note.

### Source

Source: 58 FR 3701, Jan. 11, 1993, unless otherwise noted.