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measured externally by a thermocouple probe (held tightly between two samples) and <br /> recorded The laboratory QC numbers will be placed on the labels, in the accession log, <br /> and on the chain-of-custody form If samples are acidified, their pH will be measured by <br /> narrow range pH paper at the time of opening for analysis All comments concerning <br /> procedures requiring handling of the samples will be dated and initialed on the form by <br /> the laboratory person performing the procedure A copy of the completed <br /> chain-of-custody form with the comments on sample integrity will be returned to the <br /> sampler <br /> . CONCORD SOP 121841 P.pe 2 a!2 <br /> LJO� GROUNDWATER <br /> L�CE] TECHNOLOGY, INC <br />