On April 21, 2020, Flint Hills Resources (FHR) requested an alternative means of emission limitation (AMEL) under the Clean Air Act (CAA) in order to utilize a leak detection sensor network (LDSN) with a detection response framework (DRF) at its West and East Refineries located in Corpus Christi, Texas. In this document, the EPA is soliciting comment on all aspects of the AMEL request and resulting alternative leak detection and repair (LDAR) requirements that are necessary to achieve a reduction in emissions of volatile organic compounds (VOC) and hazardous air pollutants (HAPs) at least equivalent to the reduction in emissions required by the applicable LDAR standards. This document also presents and solicits comment on all aspects of a framework for future LDSN-DRF AMEL requests, which would afford the EPA the ability to evaluate those requests in a more efficient and streamlined manner.