Regulacje i polityka gospodarcza · 07/09/2007

Two Optional Methods for Relative Accuracy Test Audits of Mercury Monitoring Systems Installed on Combustion Flue Gas Streams and Several Amendments to Related Mercury Monitoring Provisions

EPA is proposing two optional methods for relative accuracy audits of mercury monitoring systems installed on combustion flue gas streams and several amendments to related mercury monitoring provisions. In specific, this action proposes two optional mercury (Hg) emissions test methods for potential use in conjunction with an existing regulatory requirement for Hg emissions monitoring specified in the Federal Register on May 18, 2005, as well as several revisions to the mercury monitoring provisions themselves. Since that Federal Register publication, EPA has received numerous comments concerning the desirability of EPA evaluating and allowing use of the measurement techniques addressed in the two optional methods in lieu of the methods identified in the cited Federal Register publication, as they can produce equally acceptable measures of the relative accuracy achieved by Hg monitoring systems. This action would allow use of these two optional methods entirely at the discretion of the owner or operator of an affected emission source in place of the two currently specified methods. This also proposes to amend Performance Specification 12A by adding Methods 30A and 30B to the list of