1. API (American Petroleum Institute) “Risk-Based Inspection Base Resource Document,” API Publication 581, 1 st Ed., May 2000
2. API (American Petroleum Institute) “Recommended Practice for Classification of Locations for Electrical Installation at Petroleum Facilities Classified as Class I, Division 1 and Division 2,” API Recommended Practice 500, 2002
3. API (American Petroleum Institute) “Ignition Risk of Hydrocarbon Liquids and Vapors by Hot Surfaces in the Open Air,” API Recommended Practice 2216, 3 rd Ed.,” December 2003
4. API (American Petroleum Institute) “Spark Ignition Properties of Hand Tools,” API Recommended Practice 2214, 4 th Ed., July 2004
5. API (American Petroleum Institute) “Risk Based Inspection Technology,” API Recommended Practice 581, 2008