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1 <br /> quality assurance procedures for sample handling, analyses, equipment operation, and data <br /> reporting <br /> The Grundfos pump, electronic water level indicator, and tubing are thoroughly <br /> decontaminated prior to each use using a three-bucket wash The three-bucket wash consists <br /> ' of scrubbing the equipment in a tap water and phosphate-free detergent mix, rinsing with tap <br /> water, rinsing a final time with deionized water followed by air drying Because we use <br /> single-use disposable bailers and laboratory-provided sample containers, there is no need to <br /> decontaminate this equipment <br /> Purge water generated during the sampling events is temporarily stored on-site in 55-gallon <br /> steel drums These drums are labeled as Non-Hazardous Material and inventoried following <br /> the completion of each quarterly monitoring event The purge water will be periodically <br /> removed from the site by MP Environmental and transported as non-hazardous waste to an <br /> 1 appropriate disposal facility <br /> �i <br /> `I <br /> 1 <br /> 1 <br /> • <br /> 1 <br /> HALEY$z <br /> ' ALDRICH <br />