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bursting of the glass vial) A thermometer with a <br /> protected bulb should be carried in each ice <br /> chest. <br /> ' C. Surface water: Grab samples should be collected <br /> in appropriate glass containers supplied by the <br /> ' laboratory. The sample should be collected in <br /> such a manner that air bubbles are not entrapped. <br /> Semisolid samples should be collected the same <br /> way. The collected samples should be refrigerated <br /> ' (blue ice, 4 'C) for transport and analyzed within <br /> 7 days of collection (14 days with preservatives) . <br /> 10 <br /> I A15 <br /> i <br /> I <br /> f <br />