The need to revise the standard comes from audits / fines related to sampling products, it was noted that while API MPMS 8.1 / ASTM D4057 mentions rinsing containers, which is currently not in the procedures. Additionally, the EPA fuel streamlining rule reviews has identified clarity on the procedures in the document is needed. Add additional definitions as needed for clarity and consistency. Edit some verbiage on sample point safety around climbing and access to tank roofs. Add a sister section on homogeneous products before the section on non-homogeneous products to add clarity to the document. Edit verbiage on sample delivery tubes to include fixed delivery tubes.