This change to the proposed rule clarifies the definition of a 'Well Site", adds missing definitions, and clarifies that VOC control devices that meet the requirements of Federal NSPS OOOOa automatically meet the requirements of this rule. (EDITOR'S NOTE: The original proposed new rule upon which this change in proposed rule (CPR) was based was published in the October 1, 2017, issue of the Utah State Bulletin, on page 79. Underlining in the rule below indicates text that has been added since the publication of the proposed new rule mentioned above; strike-out indicates text that has been deleted. You must view the CPR and the proposed new rule together to understand all of the changes that will be enforceable should the agency make this rule effective.)