---
kind: "section"
citation: "40 C.F.R. § 63.5710"
title: "40"
number: "63.5710"
heading: "How do I demonstrate compliance using emissions averaging?"
url: "https://uscodex.org/cfr/40/63.5710"
---

# §63.5710. How do I demonstrate compliance using emissions averaging?

- (a) Compliance using the emissions averaging option is demonstrated on a 12-month rolling-average basis and is determined at the end of every month (12 times per year). The first 12-month rolling-average period begins on the compliance date specified in [§ 63.5695](/cfr/40/63.5695.md).
- (b) At the end of the twelfth month after your compliance date and at the end of every subsequent month, use equation 1 of this section to demonstrate that the organic HAP emissions from those operations included in the average do not exceed the emission limit in [§ 63.5698](/cfr/40/63.5698.md) calculated for the same 12-month period. (Include terms in equation 1 of [§ 63.5698](/cfr/40/63.5698.md) and equation 1 of this section for only those operations and materials included in the average.)
- (c) At the end of every month, use equation 2 of this section to compute the weighted-average MACT model point value for each open molding resin and gel coat operation included in the average.
- (d) You must use the equations in Table 3 to this subpart to calculate the MACT model point value (PVi) for each resin and gel coat used in each operation in the past 12 months.
- (e) If the organic HAP emissions, as calculated in [paragraph (b)](#b) of this section, are less than the organic HAP limit calculated in [§ 63.5698(b)](/cfr/40/63.5698.md?p=b) for the same 12-month period, then you are in compliance with the emission limit in [§ 63.5698](/cfr/40/63.5698.md) for those operations and materials included in the average.

## Notes

### Amendments

[66 FR 44232, Aug. 22, 2001; 66 FR 50504, Oct. 3, 2001]

### Source

Source: 66 FR 44232, Aug. 22, 2001, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[66 FR 44232, Aug. 22, 2001; 66 FR 50504, Oct. 3, 2001]