---
kind: "section"
citation: "40 C.F.R. § 63.8390"
title: "40"
number: "63.8390"
heading: "What parts of my plant does this subpart cover?"
url: "https://uscodex.org/cfr/40/63.8390"
---

# §63.8390. What parts of my plant does this subpart cover?

- (a) This subpart applies to each existing, new, or reconstructed affected source at a BSCP manufacturing facility.
- (b) For the purposes of this subpart, the affected sources are described in paragraphs [(b)(1)](#b-1) and [(2)](#b-2) of this section.
  - (1) **All tunnel kilns at a BSCP manufacturing facility are an affected source.** For the remainder of this subpart, a tunnel kiln with a design capacity equal to or greater than 9.07 megagrams per hour (Mg/hr) (10 tons per hour (tph)) of fired product will be called a large tunnel kiln, and a tunnel kiln with a design capacity less than 9.07 Mg/hr (10 tph) of fired product will be called a small tunnel kiln.
  - (2) **Each periodic kiln is an affected source.**
- (c) Process units not subject to the requirements of this subpart are listed in [paragraphs (c)(1) through (4)](#c-1..c-4) of this section.
  - (1) Kilns that are used exclusively for setting glazes on previously fired products are not subject to the requirements of this subpart.
  - (2) **Raw material processing and handling.**
  - (3) **Dryers.**
  - (4) **Sources covered by subparts KKKKK and SSSSS of this part.**
- (d) A source is a new affected source if construction of the affected source began after December 18, 2014, and you met the applicability criteria at the time you began construction.
- (e) An affected source is reconstructed if you meet the criteria as defined in [§ 63.2](/cfr/40/63.2.md).
- (f) **An affected source is existing if it is not new or reconstructed.**

## Notes

### Source

Source: 80 FR 65520, Oct. 26, 2015, unless otherwise noted.

### Authority

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

### Source

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