Q513. Subpart W Table W-4 has four sections in the final Federal Register publication.  The first and third sections are both labeled "Leaker Emission Factors Storage Station, Gas Service" and both tables have an entry for "Open-ended Line".

A513. EPA has acknowledged the error and is considering options to address this.  The entry in Table W-4, the second occurrence of the emission factor for Open-Ended Line with a value of 0.03 scf/hour/component should be included in the Population Emission Factors – Storage Wellheads, Gas Service section of Table W-4.