---
kind: "section"
citation: "40 C.F.R. § 63.1085"
title: "40"
number: "63.1085"
heading: "What are the general requirements for heat exchange systems?"
url: "https://uscodex.org/cfr/40/63.1085"
---

# §63.1085. What are the general requirements for heat exchange systems?


Unless you meet one of the requirements for exemptions in [§ 63.1084](/cfr/40/63.1084.md), you must meet the requirements in [paragraphs (a) through (f)](#a..f) of this section.

- (a) Except as specified in [paragraph (e)](#e) of this section, you must monitor the cooling water for the presence of substances that indicate a leak according to [§ 63.1086(a) through (d)](/cfr/40/63.1086.md?p=a..d).
- (b) Except as specified in [paragraph (f)](#f) of this section, if you detect a leak, then you must repair it according to § [63.1087(a)](/cfr/40/63.1087.md?p=a) and [(b)](/cfr/40/63.1087.md?p=b) unless repair is delayed according to [§ 63.1088(a) through (c)](/cfr/40/63.1088.md?p=a..c).
- (c) Keep the records specified in [§ 63.1089](/cfr/40/63.1089.md).
- (d) Submit the reports specified in [§ 63.1090](/cfr/40/63.1090.md).
- (e) Beginning no later than the compliance dates specified in [§ 63.1081(a)](/cfr/40/63.1081.md?p=a), the requirements specified in [§ 63.1086(a) through (d)](/cfr/40/63.1086.md?p=a..d) no longer apply; instead, you must monitor the cooling water for the presence of total strippable hydrocarbons that indicate a leak according to [§ 63.1086(e)](/cfr/40/63.1086.md?p=e). At any time before the compliance dates specified in [§ 63.1081(a)](/cfr/40/63.1081.md?p=a), you may choose to comply with the requirements in this paragraph in lieu of the requirements in [paragraph (a)](#a) of this section.
- (f) Beginning no later than the compliance dates specified in [§ 63.1081(a)](/cfr/40/63.1081.md?p=a), the requirements specified in §§ [63.1087(a)](/cfr/40/63.1087.md?p=a) and [(b)](/cfr/40/63.1087.md?p=b) and [63.1088(a) through (c)](/cfr/40/63.1088.md?p=a..c), no longer apply; instead, if you detect a leak, then you must repair it according to § [63.1087(c)](/cfr/40/63.1087.md?p=c) and [(d)](/cfr/40/63.1087.md?p=d), unless repair is delayed according to [§ 63.1088(d)](/cfr/40/63.1088.md?p=d). At any time before the compliance dates specified in [§ 63.1081(a)](/cfr/40/63.1081.md?p=a), you may choose to comply with the requirements in this paragraph in lieu of the requirements in [paragraph (b)](#b) of this section.

## Notes

### Amendments

[67 FR 46271, July 12, 2002, as amended at 85 FR 40419, July 6, 2020]

### Source

Source: 67 FR 46271, July 12, 2002, unless otherwise noted.

### Authority

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

### Source

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

### Amendments

[67 FR 46271, July 12, 2002, as amended at 85 FR 40419, July 6, 2020]