"SCOPE AND PURPOSE This standard covers the design@ construction@ operation@ inspection@ and maintenance of petroleum terminal and tank facilities associated with marketing@ refining@ pipeline@ and other similar activities as stipulated in 1.1.1 through 1.1.7. This standard covers the issues of site selection and spacing@ pollution prevention and waste management@ safe operation@ fire prevention and protection@ tanks@ dikes and berms@ mechanical systems@ product transfer@ corrosion protection@ structures@ utilities and yard@ and removals and decommissioning. The purpose of this standard is to consolidate a wide base of current industry experience@ knowledge@ information@ and management practices into a cohesive standard comprising a range of best practices. Mandatory requirements in this standard are designated by the word ""shall"" or ""must."" Recommendations are designated by the use of the word ""should."" Optional items are designated by the word ""may"" (refer to Section 3). This standard incorporates by reference a number of other standards and recommended practices. The distinctions between mandatory@ recommended@ and optional provisions in the referenced documents are not changed by the nature of their reference in this standard. The values stated for this standard are in U.S. Customary units with the International System of units (SI) provided in parentheses. The petroleum industry is engaged in the manufacture@ storage@ transportation@ blending@ and distribution of crude oil and refined products. Individual terminal facilities and plants may perform one or more of these functions. These facilities represent diverse operations ranging from small distribution facilities (e.g.@ bulk plants and warehouses)@ to large storage and distribution facilities (e.g.@ pipeline and marine terminals and wholesale plants)@ and large integrated facilities (e.g.@ petroleum refineries@ and grease production@ oil blending and packaging plants). The specific application of this standard within those various types of operations is itemized in 1.1.1 through 1.1.7."