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w <br /> i <br /> Because MTBE and pentane co-elute, they are listed together in the <br /> table. <br /> : s For QA/QC purposes, a dt'�olicate analysis was performed on <br /> every tenth field sample. Laboratory syringe blanks of carrier <br /> gas were also analyzed after every tenth field sample. <br /> i <br /> ff <br /> 3 <br /> f - <br /> 1 <br /> 1 6 <br /> r <br />