Rationale

This work item proposes revisions to ASTM D676 to better align with current best practices. Proposed changes include: (1) removal of Scenario I water hydration procedure while retaining leachate hydration; (2) revision of electrical conductivity (EC) termination criterion to reflect practical test variability; and (3) relocation of Appendix X1 (Falling Head Constant Tailwater Without Back Pressure Hydraulic Conductivity Test Procedure) into the main body as a second test method.