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STANDARD OPERATING PROCEDURES 15 <br />PAGE 2 <br />C. The remaining 2 in 20 samples should be used by lab for spiking with reference materials <br />for internal QC. <br />Other QC procedures can be specified at the project manager's discretion. See Table 3-2 <br />(reference 2) attached. <br />5. Decontamination of equipment in the field requires a detergent wash, with a distilled water rinse. <br />REFERENCES <br />1. Soil Sampling Quality Assurance Users Guide, U.S. EPA Environmental Monitoring Systems <br />Laboratory, Las Vegas, NV, EPA 600/4-84-043, May 1984. <br />2. Preparation of Soil Sampling Protocol. Techniques and Strategies, U.S. EPA, Environmental <br />Monitoring Systems Laboratory, Las Vegas, NV, EPA 600/4-83-020, August 1983 (PB83-206979). <br />3. Test Methods for Evaluating Solid Waste, U.S. EPA, Office of Solid Waste and Emergency <br />Response, Washington, D.C., SW 846, July 1982. <br />GROUNDWATER <br />TECHNOLOGY <br />