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SOP 6 - EQUIPMENT DECONTAMINATION <br /> Prior to drilling each monitoring-well boring, augers will be steam cleaned. Steam cleaning <br /> will be conducted over plastic and rinsate waters will be retained and transferred to a 55- <br /> gallon drum for storage. <br /> Between soil-sampling attempts, soil samplers will be disassembled and washed in a solution <br /> of low-phosphate laboratory-grade detergent, rinsed with clean water, and reassembled with <br /> clean sample liners to minimize the potential of spreading possible contaminants among <br /> samples. <br /> Prior to groundwater sampling at each well location, well points, casing, Hydropunch <br /> samplers, purge pumps and associated hose will be decontaminated by washing with a low- <br /> phosphate detergent, followed by rinses with tap water. Flushing the pumps and hoses with <br /> hot water and steam will be considered adequate decontamination. <br /> Instrumentation used to measure depth to water and total depth of wells, will be <br /> decontaminated by washing with a non-phosphate detergent and rinsing with tap water. <br /> Instrumentation used to measure pH, temperature, and specific conductance will be rinsed <br /> with de-ionized water after each measurement. <br /> Decontamination procedures and use of decontaminated equipment will be documented in the <br /> field logbook <br /> wpm sora-m00000s-PzMad J=IM SOP 6 -1 <br /> •ssociates <br />