API Publ 4674
Assessing the Signifigance of Subsurface Contaminant Vapor Migration to Enclosed Spaces; Site-Specific Alternatives to Generic Estimates
standard by American Petroleum Institute, 12/01/1998
API 6D Errata
Supplement 2 & Errata - Specification for Pipeline Valves (Gate, Plug, Ball and Check Valves)
standard by American Petroleum Institute, 12/01/1998
API Publ 9100A
Model Environmental, Health and Safety (EHS) Management System - A Voluntary Tool for Companies Interested in Developing an EHS Management System or Enhancing an Existing System
standard by American Petroleum Institute, 10/22/1998