Regulations last checked for updates: May 13, 2025

Title 40 - Protection of Environment last revised: Nov 13, 2025
All TitlesTitle 40Chapter IPart 435Subpart AAppendix Appendix 6 - 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)
Collapse to view onlyAppendix Appendix 6 - 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)
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authority: 33 U.S.C. 1251,1311,1314,1316,1317,1318,1342
source: 44 FR 22075, Apr. 13, 1979, unless otherwise noted.
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