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Guidance for Site Checks and Site Assessments for Underground Storage Tanks, April, 2003 (revised)
Field Measurements: Dependable Data When You Need It, U.S. Environmental Protection Agency, September 1990, (EPA/530/UST-90-003), Chapter IV, "Analytical Field Instruments."
Ground Water, Volume II: Methodology, U.S. Environmental Protection Agency, July 1991, (EPA/625/6-90/016b), Chapter 2, "Groundwater Sampling."
Collecting and Preparing Soil Samples for VOC Analysis, Implementation Memorandum #5, June 17, 2004, Washington State Department of Ecology
Washington State Department of Ecology: Underground Storage Tank Site Assessment Study Guide
Washington State Department of Ecology: Underground Storage Tank Site Assessment Study Guide