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Methods for Organic Chemical Analysis of Municipal and <br /> Industnal Wastewater, EPA-00014-82-057, July 1982 <br /> Test Methods for Evaluating Sold Wastes PhYsicaUChemical <br /> Methods, EPA SW4846, 3rd edition, November 1986 <br /> i <br /> Leaking Underground Fuel Tank Manual, State Water <br /> Resources Control Board, State of California Leafing <br /> Underground Fuel Tank Task Force, revised October 1989 <br /> with Appendices A-M <br /> ' Tn-Regional Board Staff Recommendations for Preliminary <br /> Investigation and Evaluation of Underground Tank Sites, <br /> Central Valley Regional Water Control Board, August 30, 1991 <br /> The laboratories selected to perform the analytical work will be certified by the <br /> ' Office of Environmental Health Hazard Assessment <br /> Quality Assurance/Quality Control <br /> iQuality assurance/quality 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 /> 1� <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 /> 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 /> C - 14 <br />