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• Methods for Organic Chemical Analysis of Municipal and Industrial <br />Wastewater, EPA, 600/4-82-057, 1982. <br />• Practical Guide for Groundwater Sampling:. EPA, 600/2-85/104, September <br />1985. <br />• RCRA Ground -Water Monitoring Technical Enforcement Guidance <br />Document, EPA, September 1986. <br />The analytical methods used by the selected laboratories are those required by the type <br />of analysis (fuels, metals, etc.). These methods are those currently approved by the <br />State Regional Water Quality Control Board. <br />EXCELTECH, INC. <br />Laboratory Procedures <br />Latest Revision: March 28, 1990 <br />