---
kind: "section"
citation: "40 C.F.R. § 60.2135"
title: "40"
number: "60.2135"
heading: "How do I demonstrate initial compliance with the emission limitations and establish the operating limits?"
url: "https://uscodex.org/cfr/40/60.2135"
---

# §60.2135. How do I demonstrate initial compliance with the emission limitations and establish the operating limits?

- (a) You must conduct a performance test, as required under §§ [60.2125](/cfr/40/60.2125.md) and [60.2105to](/cfr/40/60.2105to.md) determine compliance with the emission limitations in table 1 of this subpart or tables 5 through 8 of this subpart, to establish compliance with any opacity operating limit in [§ 60.2110](/cfr/40/60.2110.md), to establish the kiln-specific emission limit in [§ 60.2145(y)](/cfr/40/60.2145.md?p=y), as applicable, and to establish operating limits using the procedures in [§ 60.2110](/cfr/40/60.2110.md) or [§ 60.2115](/cfr/40/60.2115.md). The performance test must be conducted using the test methods listed in table 1 of this subpart or tables 5 through 8 of this subpart and the procedures in [§ 60.2125](/cfr/40/60.2125.md). The use of the bypass stack during a performance test shall invalidate the performance test.
- (b) As an alternative to conducting a performance test, as required under §§ [60.2125](/cfr/40/60.2125.md) and [60.2105](/cfr/40/60.2105.md), you may use a 30-day rolling average of the 1-hour arithmetic average CEMS data, including CEMS data during startup and shutdown as defined in this subpart, to determine compliance with the emission limitations in Table 1 of this subpart or tables 5 through 8 of this subpart. You must conduct a performance evaluation of each continuous monitoring system within 180 days of installation of the monitoring system. The initial performance evaluation must be conducted prior to collecting CEMS data that will be used for the initial compliance demonstration.

## Notes

### Source

Source: 84 FR 15853, Apr. 16, 2019, unless otherwise noted.

### Authority

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

### Source

Source: 36 FR 24877, Dec. 23, 1971, unless otherwise noted.