40 CFR Part 63, Table 11
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
| To comply with | Inspection or monitoring requirement | Frequency of inspection or monitoring | Method |
|---|---|---|---|
| Tanks: | |||
| 63.133(b)(1) | Inspect fixed roof and all openings for leaks | Initially Semi-annually | Visual. |
| 63.133(c) | Inspect floating roof in accordance with §§ 63.120 (a)(2) and (a)(3) | See § 63.120 (a)(2) and (a)(3) | Visual. |
| 63.133(d) | Measure floating roof seal gaps in accordance with §§ 63.120 (b)(2)(i) through (b)(4) | | See § 63.120 (b)(2)(i) through (b)(4). | |
| —Primary seal gaps | Once every 5 years Initially Annually | ||
| —Secondary seal gaps | |||
| 63.133(f) 63.133(g) | Inspect wastewater tank for control equipment failures and improper work practices | Initially Semi-annually | Visual. |
| Surface impoundments: | |||
| 63.134(b)(1) | Inspect cover and all openings for leaks | Initially Semi-annually | Visual. |
| 63.134(c) | Inspect surface impoundment for control equipment failures and improper work practices | Initially Semi-annually | Visual. |
| Containers: | |||
| 63.135(b)(1), 63.135(b)(2) (ii) | Inspect cover and all openings for leaks | Initially Semi-annually | Visual. |
| 63.135(d)(1) | Inspect enclosure and all openings for leaks | Initially Semi-annually | Visual. |
| 63.135(e) | Inspect container for control equipment failures and improper work practices | Initially Semi-annually | Visual. |
| Individual Drain Systems a: | |||
| 63.136(b)(1) | Inspect cover and all openings to ensure there are no gaps, cracks, or holes | Initially Semi-annually | Visual. |
| 63.136(c) | Inspect individual drain system for control equipment failures and improper work practices | Initially Semi-annually | Visual. |
| 63.136(e)(1) | Verify that sufficient water is present to properly maintain integrity of water seals | Initially Semi-annually | Visual. |
| 63.136(e)(2), 63.136(f)(1) | Inspect all drains using tightly-fitted caps or plugs to ensure caps and plugs are in place and properly installed | Initially Semi-annually | Visual. |
| 63.136(f)(2) | Inspect all junction boxes to ensure covers are in place and have no visible gaps, cracks, or holes | Initially Semi-annually | Visual or smoke test or other means as specified. |
| 63.136(f)(3) | Inspect unburied portion of all sewer lines for cracks and gaps | Initially Semi-annually | Visual. |
| Oil-water separators: | |||
| 63.137(b)(1) | Inspect fixed roof and all openings for leaks | Initially Semi-annually | Visual. |
| 63.137(c) | Measure floating roof seal gaps in accordance with 40 CFR 60.696(d)(1) | Initially b | See 40 CFR 60.696(d)(1). |
| —Primary seal gaps | Once every 5 years | ||
| 63.137(c) | —Secondary seal gaps | Initially b Annually | |
| 63.137(d) | Inspect oil-water separator for control equipment failures and improper work practices | Initially Semi-annually | Visual. |
a As specified in § 63.136(a), the owner or operator shall comply with either the requirements of § 63.136 (b) and (c) or § 63.136 (e) and (f).
b Within 60 days of installation as specified in § 63.137(c).