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1 <br /> 2. CONTAMINANT DATA ANALYSIS <br /> Quality Assurance Laboratory continues to have lab and/or sampling hygiene <br /> problems. There was a high occurrence rate of methylene chloride cross <br /> contamination. Cure notice has been issued to Contractor. <br /> The purpose of this section is to check for: consistancy with previous data; <br /> contamination of wells previously not contaminated; and expansion of the <br /> plume to perimeter wells. <br />