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dissolved metals analysis are to be first filtered through a 0.45 micron filter prior to any <br /> required preservation and analysis. All samples should then be sealed and placed in an ice <br /> filled chest(synthetic or blue ice appropriate) for shipment to the laboratory. <br /> 7)After sampling, the pump should be shut off and all of the equipment removed from the <br /> well. The well cap is then rinsed with a dilute chlorine solution and both the well cap and the <br /> well cover replaced on the well. <br />