---
kind: "section"
citation: "40 C.F.R. § 63.493"
title: "40"
number: "63.493"
heading: "Back-end process provisions."
url: "https://uscodex.org/cfr/40/63.493"
---

# §63.493. Back-end process provisions.


Owners and operators of new and existing affected sources shall comply with the requirements in [§§ 63.494 through 63.500](/cfr/40/63.494..63.500.md). Owners and operators of affected sources whose only elastomer products are latex products, liquid rubber products, or products produced in a gas-phased reaction process, are not subject to the provisions of [§§ 63.494 through 63.500](/cfr/40/63.494..63.500.md). If latex or liquid rubber products are produced in an affected source that also produces another elastomer product, the provisions of [§§ 63.494 through 63.500](/cfr/40/63.494..63.500.md) do not apply to the back-end operations dedicated to the production of one or more latex products, or to the back-end operations during the production of a latex product. Table 8 to this subpart contains a summary of compliance alternative requirements for the emission limits in [§ 63.494(a)(1)-(3)](/cfr/40/63.494.md?p=a-1..a-3) and associated requirements.


## Notes

### Amendments

[76 FR 22589, Apr. 21, 2011]

### Source

Source: 62 FR 46925, Sept. 5, 1996, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[76 FR 22589, Apr. 21, 2011]