---
kind: "section"
citation: "40 C.F.R. § 63.11499"
title: "40"
number: "63.11499"
heading: "What are the standards and compliance requirements for heat exchange systems?"
url: "https://uscodex.org/cfr/40/63.11499"
---

# §63.11499. What are the standards and compliance requirements for heat exchange systems?

- (a) Except as specified in [paragraph (d)](#d) of this section, if the cooling water flow rate in your heat exchange system is equal to or greater than 8,000 gal/min and is not meeting one or more of the conditions in [§ 63.104(a)(1) through (4)](/cfr/40/63.104.md?p=a-1..a-4), then you must comply with one of the requirements specified in table 8 to this subpart.
- (b) For equipment that meets Current Good Manufacturing Practice (CGMP) requirements of [21 CFR part 211](/cfr/21/part211.md), you may use the physical integrity of the reactor as the surrogate indicator of heat exchanger system leaks when complying with Item 1.a in Table 8 to this subpart.
- (c) Any reference to SSM provisions in other subparts that are referenced in paragraphs [(a)](#a) and [(b)](#b) of this section or Table 8 to this subpart do not apply.
- (d) If you are required to comply with the requirements in § [63.104(f) through (j)](/cfr/40/63.104.md?p=f..j) and [(l)](/cfr/40/63.104.md?p=l) as specified in item 1.c of table 8 to this subpart (for heat exchange systems with a cooling water flow rate greater than or equal to 8,000 gal/min), then you must also comply with the requirements in [paragraphs (d)(1) through (6)](#d-1..d-6) of this section.
  - (1) Replace each occurrence of “For each source as defined in [§ 63.101](/cfr/40/63.101.md),” with “For each affected source as described in [§ 63.11494(d)](/cfr/40/63.11494.md?p=d),”.
  - (2) Replace each reference to [§ 63.100(k)(10)](/cfr/40/63.100.md?p=k-10) with [§ 63.11494(i)](/cfr/40/63.11494.md?p=i).
  - (3) Replace each occurrence of “semi-annual periodic report required by [§ 63.152(c)](/cfr/40/63.152.md?p=c)”, “semi-annual periodic report”, or “periodic report” with “semiannual compliance report”.
  - (4) The phrase “Except as specified in paragraph (g)(6) of this section,” in [§ 63.104(g)(4)](/cfr/40/63.104.md?p=g-4) does not apply.
  - (5) Section [63.104(g)(6)](/cfr/40/63.104.md?p=g-6) and [(h)(6)](/cfr/40/63.104.md?p=h-6) do not apply.
  - (6) Beginning no later than the compliance dates specified in [§ 63.11494(i)](/cfr/40/63.11494.md?p=i), you must not inject water into or dispose of water in the heat exchange system if the water is considered wastewater as defined in [§ 63.11502](/cfr/40/63.11502.md).

## Notes

### Amendments

[72 FR 73623, Dec. 28, 2007, as amended at 91 FR 16528, Apr. 1, 2026]

### Source

Source: 74 FR 56041, Oct. 29, 2009, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[72 FR 73623, Dec. 28, 2007, as amended at 91 FR 16528, Apr. 1, 2026]