---
kind: "section"
citation: "40 C.F.R. § 63.1178"
title: "40"
number: "63.1178"
heading: "For cupolas, what standards must I meet?"
url: "https://uscodex.org/cfr/40/63.1178"
---

# §63.1178. For cupolas, what standards must I meet?

- (a) You must control emissions from each cupola as specified in Table 2 to this subpart.
- (b) You must meet the following operating limits for each cupola:
  - (1) Begin within one hour after the alarm on a bag leak detection system sounds, and complete in a timely manner, corrective actions as specified in your operations, maintenance, and monitoring plan required by [§ 63.1187](/cfr/40/63.1187.md) of this subpart.
  - (2) When the alarm on a bag leak detection system sounds for more than five percent of the total operating time in a six-month reporting period, develop and implement a written quality improvement plan (QIP) consistent with the compliance assurance monitoring requirements of [§ 64.8(b)-(d)](/cfr/40/64.8.md?p=b..d) of [40 CFR part 64](/cfr/40/part64.md).
  - (3) Additionally, on or after the applicable compliance date for each new or reconstructed cupola, you must either:
    - (i) Maintain the operating temperature of the incinerator so that the average operating temperature for each three-hour block period never falls below the average temperature established during the performance test, or
    - (ii) Maintain the percent excess oxygen in the cupola at or above the level established during the performance test. You must determine the percent excess oxygen using the following equation:

## Notes

### Amendments

[64 FR 29503, June 1, 1999, as amended at 80 FR 45329, July 29, 2015]

### Source

Source: 64 FR 29503, June 1, 1999, unless otherwise noted.

### Authority

Authority: 42 U.S.C. 7401 et seq.

### Source

Source: 57 FR 61992, Dec. 29, 1992, unless otherwise noted.

### Amendments

[64 FR 29503, June 1, 1999, as amended at 80 FR 45329, July 29, 2015]