Rationale

Ballot 1 Changes: Reviewed and Updated standard caveats Section 3—Terminology and symbols have been reviewed and made consistent with D1586-18e1 Note 8—Revised “9 to 12 m or more” to “9 m or more” Note 10—Removed “final” to account for environmental samples that measure four 150 mm/6 inch samples, but use second and third increments. Ballot 2 Changes, 1st Revision: Added “Units” to 1.3 In an effort to shorten the standard, removed the nonmandatory information in the appendix. This also allowed for N60 to be removed from definitions, as it is not otherwise described in this standard (although it is heavily referenced in D1586 and D6066). Removed analog systems from standard. Created Summary of Changes from last standard.