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GEOMATRIX <br /> inside of the pump and tubing also should be steam-cleaned. For a purge pump with <br /> a backflow check valve,the interior of the pump and tubing may be cleaned by <br /> pumping a laboratory-grade detergent and potable water solution through the system <br /> followed by a potable water rinse,or by steam-cleaning. <br /> • Water Quality Meters -All meters will be cleaned by rinsing the probe portions in <br /> DI water,and allowing to air dry. <br /> • Bailer Tripod-The tripod cable will be steam-cleaned or rinsed with DI water. <br /> Sample bottles and bottle caps will be cleaned by the subcontracted laboratory using standard <br /> EPA-approved protocols. Sample bottles and bottle caps will be protected from contact with <br /> solvents, dust,or other contamination. Sample bottles will not be reused. <br /> 6.0 REFERENCES <br /> Barcelona,M.J.,et al., 1994,Reproducible Well-Purging Procedures and VOC Stabilization <br /> Criteria for Ground-Water Sampling: Groundwater, January-February. <br /> Kearl,P.M.,et al., 1994, Field Comparison of Micropurging vs. Traditional Ground Water <br /> Sampling: Ground Water Monitoring Review,Fall. <br /> Attachments: Water and Soil Analytical Methods and Sample Handling <br /> Well Sampling and/or Development Record <br /> Daily Field Record <br /> Chain-of-Custody Record <br /> Sample Control Log Sheet <br /> LADoc_Safe\PROrocoiAPROTO-MW.doc SAMNING OF GROUNDWATER MONITDRING WELLS AND WATER SUPPLY WELLS <br /> Page 9 of 9 <br /> Revision Date: March 1996 <br />