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Title 40

Displaying title 40, up to date as of 7/17/2026. Title 40 was last amended 7/16/2026.
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Title 40Protection of EnvironmentPart / Section
Chapter IEnvironmental Protection Agency1 – 1099
Subchapter NEffluent Guidelines and Standards400 – 471
Part 435Oil and Gas Extraction Point Source Category435.10 – 435.70
Subpart AOffshore Subcategory435.10 – 435.15
§ 435.10Applicability; description of the offshore subcategory.
§ 435.11Specialized definitions.
§ 435.12Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
§ 435.13Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
§ 435.14Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology (BCT).
§ 435.15Standards of performance for new sources (NSPS).
Appendix 1 to Subpart A of Part 435
Static Sheen Test (EPA Method 1617)
Appendix 2 to Subpart A of Part 435
Drilling Fluids Toxicity Test (EPA Method 1619)
Appendix 3 to Subpart A of Part 435
Procedure for Mixing Base Fluids With Sediments (EPA Method 1646)
Appendix 4 to Subpart A of Part 435
Protocol for the Determination of Degradation of Non-Aqueous Base Fluids in a Marine Closed Bottle Biodegradation Test System: Modified ISO 11734:1995 (EPA Method 1647)
Appendix 5 to Subpart A of Part 435
Determination of Crude Oil Contamination in Non-Aqueous Drilling Fluids by Gas Chromatography/Mass Spectrometry (GC/MS) (EPA Method 1655)
Appendix 6 to Subpart A of Part 435
Reverse Phase Extraction (RPE) Method for Detection of Oil Contamination in Non-Aqueous Drilling Fluids (NAF) (GC/MS) (EPA Method 1670)
Appendix 7 to Subpart A of Part 435
Determination of the Amount of Non-Aqueous Drilling Fluid (NAF) Base Fluid From Drill Cuttings by a Retort Chamber (Derived From API Recommended Practice 13B-2) (EPA Method 1674)
Appendix 8 to Subpart A of Part 435
Reference C16-C18 Internal Olefin Drilling Fluid Formulation