"The U.S. Environmental Protection (EPA) Agency has developed an Agency-wide program of quality assurance for environmental data. EPA's Quality System requires documentation of both management and technical activities. This guidance document, 'Guidance for Preparing Standard Operating Procedures (SOPs)' provides a standard working tool that can be used to document routine quality system management and technical activities. It replaces EPA's March 2001's 'Guidance for Preparing Standard Operating Procedures (SOPs)' EPA/240/B-01-004 with minimal revisions in text and new examples of both technical and administrative SOPs. This document is one of the U.S. Environmental Protection Agency Quality System Series documents. These documents describe the EPA policies and procedures for planning, implementing, and assessing the effectiveness of the Quality System. As required by EPA Manual 5360 A1 (May 2000), this document is valid for a period of up to five years from the official date of publication. After five years, this document will be reissued without change, revised, or withdrawn from the U.S. Environmental Protection Agency Quality System Series documents."
Environmental Protection Agency: https://www..epa.gov/