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Section No. 9.0 <br /> Revision No. 6 <br /> Date 6/1/88 <br /> Page 18 <br /> b. A travel blank (generally far volatile analysis) is <br /> prepared by the laboratory and transported to the field, <br /> along with the sample containers. The travel blank <br /> undergoes all of the same handling as a sample, e.g., <br /> placed i3, the same cooler at the time of sampling, thus <br /> showing if any contamination was picked up during <br /> transportation. Travel blanks will be used to assess the <br /> environment the bottles and samples underwent during <br /> }- transportation. The results from the travel blank arra used <br /> r <br /> 9 to assess contamination encountered during transportation. <br /> Should contamination occt!-, corrective measures must be <br /> taken (ie, monitoring, resampling).. <br /> c. A field blank is prepared at the sampling site and returned <br /> blind to the laboratory with the sample. The field blank <br /> is exposed to the same environmental factors as the samples <br /> and is a good test to see if contamination is picked up at <br /> the time of sampling. Field blanks are used to monitor <br /> sampling techniques and are usually analyzed as a blind QC <br /> sample. These should occur at a rate of one for every 20 <br /> samples. <br /> d. Field equipment blanks are blanks obtained by running <br /> analyte-free deionized water through sample collection <br /> equipment (bailers, pumps, augers, etc.) after <br /> decontamination. These samples are analyzed to determine . <br /> if decontamination procedures have been performed <br /> adequately, For soil sampling, these blanks will be <br /> rinsate samples. These should occur at a rate of one for <br /> every 20 samples •for each matrix type. <br />