D6216 Practice for Opacity Monitor Manufacturers to Certify Conformance with Design and Performance Specifications appeared on a Reapproval Ballot closing 07-26-20. The item was last reapproved in 2012; hence it was in danger of expiring. The Chair requested that membership identifying revision need(s) vote affirmative with comments. The Chair committed to creating a work item for revision if comments were received. One member commented as follows: Most of my concerns are around section 188.8.131.52, the insensitivity to ambient light section of the standard. In addition, he submitted five bulleted items submitted with his comments. This revision will be conducted to answer the commentators concerns.