For many years, storage tank operators relied on USEPA’s TANKS software to estimate storage tank air emissions. As is well documented, TANKS miscalculates air emissions and is no longer supported by USEPA. Further, the AP-42 storage tank section has been amended which renders TANKS even further out-of-date. Commercial software is becoming the industry standard to estimate storage tank emissions. These commercial software packages typically come with the standard library of

ISO 14001 has two main categories of audits; internal and external. Internal audits, an ISO 14001 requirement, are both a key component for becoming ISO certified and critical to the success of an environmental management system (EMS). Internal audits can be conducted in two different ways depending on time and financial constraints: On-site audits are performed in full days. The number of days needed for an audit depends on several factors including size, complexity, risk,