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Groundwater Quality Sampling Plan <br /> Field Blank-A field blank consists of empty sample bottles filled with distilled or <br /> deionized water at the sample site by sampling personnel. The field blank will <br /> also be analyzed by the laboratory as if it was a "real"sample. <br /> Equipment Blank-A variation of the field blank is the equipment blank. <br /> Equipment blanks are prepared in a manner identical to field blanks, except that <br /> distilled or deionized water is poured through clean (field decontaminated) <br /> sampling equipment and into the sample bottle. Equipment blank samples are <br /> analyzed for all analyses and are used to verify that sampling equipment is <br /> uncontaminated. <br /> At least one of the QA/QC sample methods will be conducted every 4 sample events, <br /> one in four, during the first five years of sampling. <br /> 5.0 Analytical Procedures <br /> Volatile organic constituents (VOCs)will be analyzed in accordance with Method 8260 <br /> of EPA Report SW-846, Test Methods for Evaluating Solid Waste, while inorganic <br /> constituents will be analyzed by Method 6010 of SW-846, or other appropriate EPA <br /> methods. Reporting limits(RLs) for the parameters analyzed will be the lowest <br /> concentrations that can be reliably achieved within the specified limits of precision and <br /> accuracy during routine laboratory operating conditions and will be below any <br /> promulgated maximum contaminant levels (MCLs). Instrument detection limits will be <br /> kept at or below the RLs. Some analytical results may be reported below the RL and <br /> above the Method Detection Limit (MDL)with an estimated value. These results will be <br /> flagged, and the result determined as an estimate and not a reported value. <br /> 6.0 Analytical Data Review <br /> Upon receipt of the analytical results, general analytical data evaluation (i.e., data <br /> validation)will be performed. At a minimum, this evaluation will address the following: <br /> • Overall data completeness; <br /> • A review of laboratory qualified data; <br /> • Comparison of field duplicate results to original sample results; <br /> • Comparison of trip blank and method blank results to sample results; <br /> • Review of data accuracy based on cation-anion balances, etc.; and <br /> • Review of laboratory QA/QC sample results including comparison to spike <br /> recoveries to control limits. <br /> Results of the data review will be documented and used to initiate additional review by <br /> the laboratory or possibly addition qualifications of the analytical data by the reviewer. <br /> VA M& �►OLE LG Everist Sampling Plan <br /> Page 9 of 10 <br /> 48 <br />