EPA published an advance notice of proposed rulemaking (ANPRM) in October 2009 seeking comment on proposed approaches to improving the emissions factors program. The agency sought comment on acquiring data for the development or improvement of the emissions factors; specifically, proposing to require the submission (via electronic reporting) of performance testing information already collected by industry by revising the reporting requirements in 40 CFR part 60 for a new source performance standard (NSPS). Performance tests are conducted periodically to measure the air pollutant emissions from an industrial process and are used as an indicator of compliance with regulations. In addition to performance test data, this rulemaking proposes to require the electronic submission of other selected compliance data, such as excess emissions reports, that are already being compiled and submitted by industry to regulatory authorities. These data can be used for regulation development, control strategy development, rule effectiveness studies, risk analyses, and other air pollution control activities.