---
kind: "section"
citation: "40 C.F.R. § 63.4293"
title: "40"
number: "63.4293"
heading: "What work practice standards must I meet?"
url: "https://uscodex.org/cfr/40/63.4293"
---

# §63.4293. What work practice standards must I meet?

- (a) **For any slashing operation, you are not required to meet any work practice standards.** For any web coating/printing operation(s) or dyeing/finishing operation(s) on which you use the compliant material option or the emission rate without add-on controls option, you are not required to meet any work practice standards. For any dyeing/finishing affected source on which you use the equivalent emission rate option, you are not required to meet any work practice standards.
- (b) If you use either the emission rate with add-on controls option, the organic HAP overall control efficiency option, or the oxidizer outlet organic HAP concentration option for a web coating/printing operation; or you use the emission rate with add-on controls option for a dyeing/finishing operation; you must develop and implement a work practice plan to minimize organic HAP emissions from the storage, mixing, and conveying of regulated materials used in, and waste materials generated by, the coating/printing or dyeing/finishing operations for which you use this option; or you must meet an alternative standard as provided in [paragraph (c)](#c) of this section. The plan must specify practices and procedures to ensure that, at a minimum, the elements specified in [paragraphs (b)(1) through (5)](#b-1..b-5) of this section are implemented.
  - (1) All organic-HAP-containing regulated materials and waste materials must be stored in closed containers.
  - (2) Spills of organic-HAP-containing regulated materials, and waste materials must be minimized.
  - (3) Organic-HAP-containing regulated materials and waste materials must be conveyed from one location to another in closed containers or pipes.
  - (4) Mixing vessels which contain organic-HAP-containing regulated materials must be closed except when adding to, removing, or mixing the contents.
  - (5) Emissions of organic HAP must be minimized during cleaning of web coating/printing or dyeing/finishing storage, mixing, and conveying equipment.
- (c) As provided in [§ 63.6(g)](/cfr/40/63.6.md?p=g), you may request approval from the Administrator to use an alternative to the work practice standards in this section.

## Notes

### Source

Source: 68 FR 32189, May 29, 2003, unless otherwise noted.

### Authority

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

### Source

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