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i Kennedy/Jenks Consultants SOG 9: Standard Operating Guideline _ Equipment Decontamination 9.1 Introduction This guideline describes field procedures typically followed by Kennedy/Jenks Consultants personnel during the decontamination of sampling and monitoring equipment. Proper decontamination procedures minimize the potential for cross-contamination among sampling points on a single site or between separate sites. 9.2 Equipment Two or three containers (e.g., 5-gallon buckets, or 5-or 10-gallon plastic tubs)for dip rinsing, washing, and collection of rinse water. • Two or three utility brushes or test tube brushes for removal of visible contamination. A test tube brush (or similar) can be stapled to the end of a dowel and used to clean the inside of a bailer. • Potable or distilled water. • Multi-gallon storage containers filled with potable water to be used for rinsing or washing. • Spray bottles, squirt bottles, or garden sprayers to apply rinse liquid. • Paper towels to wipe off gross contamination. • Garbage bags, or other plastic bags, and aluminum foil to wrap clean sampling equipment after decontamination, to store sampling equipment and to dispose of decontamination debris. 9.3 Procedures In most cases, the following procedures are adequate to remove contamination. 1. Preclean sampling equipment. If there is gross contamination on equipment, wipe it off with paper towels and/or rinse it off with water. Additional internal decontamination may be possible ` by circulation of water or cleaning solutions. 2. Wash all parts of equipment with water and scrub with brushes. Take equipment apart when appropriate to remove visible contamination. 3. Rinse the monitoring equipment and sampler with generous amounts of deionized water. �. Pouring water over the sampler is best, although spraying or using a squirt bottle to apply rinse water might be adequate if you are trying to minimize waste. ` 4. Wipe sampling equipment with a paper towel or allow it to air dry. 5. Place samplers in clean plastic bags or sealed containers, or wrap them in aluminum foil for storage in an undisturbed location that is free of contamination. Groundwater Protection Work Plan, The Wine Group SOG 9 Franzia Winery, Ripon, California 1 ` 9tis-prouplatlmin4o OM30f2002_wbkgropW,.p a^bpWdd ' 9eWgd d.