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At the time of receipt of samples by the laboratory, the <br /> shipping container will be inspected and the sealing <br /> signature will be checked, the samples will be inspected for <br /> c.iiaition and bubbles and the temperature of a representa- <br /> tive sample container will bu. measured externally by a <br /> thermocouple probe (held tightly between two samples) and <br /> recorded. The laboratory QC numbers will be placed on the <br /> labels, in the accession log, and on the chain-of-custody <br /> form. If samples are acidified their pH will be measured by <br /> narrow range pH paper at the time of opening for analysis. <br /> All comments concerning procedures requiring handling of the <br /> samples will be dated and initialed on the form by the <br /> laboratory person performing the procedure. A copy of the <br /> completed chain-of-custody form with the comments on sample <br /> integrity will be returned to the sampler. <br /> GR��1�1�1G1'Ii:H <br />