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CGRS, Inc. <br />Travel (Trio) Blanks <br />The travel blank is designed to address interferences derived from improper sample container cleaning <br />preparation, contaminated source blank water, sample cross-contamination during storage/transport and <br />extraneous environmental conditions affecting the sampling even[ to and from the site, including delivery [o <br />the laboratory. <br />Travel blanks are composed in the appropriate sample container using source blank water. Preservatives or <br />additives are added if required for the parameters group. Travel blanks are then sealed and stored in the ice <br />chest where real samples will be stored and transported. Travel blanks are to originate at the laboratory <br />providing [he blank water for [he equipment and field blanks. <br />Protocol (or Ana[vzinp Blank Samples <br />U used, [he equipment blank will be analyzed firs[. L` contamination is found [o be present, the field blank <br />will then be analyzed. if the equipment blank is not used, the first blank analyzed will be the field blank. [f <br />any blank is found to be contaminant-free, the sequence of analyses will be terminated. <br />