U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
The following industry standards may be used to comply with the requirements set forth in §§ 312.23 through 312.31:
(a) The procedures of ASTM International Standard E1527-21 entitled “Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process.” This standard is available from ASTM International at www.astm.org, 1-610-832-9585.
(b) The procedures of ASTM International Standard E2247-23 entitled “Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process for Forestland and Rural Property.” This standard is available from ASTM International at www.astm.org, 1-610-832-9585.
(c) Until February 13, 2024, the procedures of ASTM International Standard E1527-13 entitled “Standard Practice for Environmental Site Assessments: Phase I Environmental Site Assessment Process.” This standard is available from ASTM International at www.astm.org, 1-610-832-9585.
(d) Until June 24, 2025, the procedures of ASTM International Standard E2247-16 entitled “Standard Practice for Environmental Site Assessment Process for Forestland and Rural Property.” This standard is available from ASTM International at www.astm.org, 1-610-832-9585.
