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r <br /> i <br /> Quality Assurance/Quality Control <br /> i Quality ass r <br /> u ancelquality control (QA/QC) measures will be taken to confirm the <br /> integrity of the field and laboratory data generated during the monitoring program <br /> The procedures used to assess data quality are described in this section An <br /> evaluation of the field and laboratory quality assurance data will be included in the <br /> technical reports <br /> Field Quality Assurance Procedures <br /> Field quality assurance procedures will be included in each monitoring event and <br /> include documenting field instrument calibration, and collecting and analyzing trip <br /> blanks, field blanks, and duplicate samples <br /> Trip and field blanks. Trip and field blanks will be used during the sampling <br /> r events to detect contamination introduced through sampling procedures, external <br /> field conditions, sample transportation, container preparation, sample storage, and <br /> the analytical process <br /> Trip blanks will be prepared at the same time and location as the sample containers <br /> for a particular sampling event Trip blanks will accompany these containers to and <br /> from that event, but at no time opened or exposed to the atmosphere One trip <br /> blank for volatile organic parameters will typically be included for each sampling <br /> event <br /> ' Field blanks will be prepared in the same manner as trip blanks but will be exposed <br /> to the ambient atmosphere at a specified monitoring point during sample collection <br /> ' to determine the influence of the external field conditions on sample integrity One <br /> field blank for volatile organic parameters will typically be included for each day of <br /> sampling <br /> rDuplicate samples. Duplicate samples will be collected to document field <br /> precision For each sampling event, duplicate soil samples will be collected at a <br /> r specified frequency, typically 5 percent Where possible, field duplicates will be <br /> taken at sampling points known or suspected to contain constituents of interest <br /> Duplicates will be packed and shipped "blind" to the laboratory for analysis with the <br /> samples from that particular event (i e , these samples will not exhibit any special <br /> markings indicating that they are quality control samples) <br /> r <br /> C- 9 <br />