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GENESIS ENGINEERING 8 REDEVELOPMENT <br /> 3.8 Quality Control Samples <br /> Quality Control samples are collected and analyzed for the purpose of assessing the quality <br /> of the sampling effort and the analytical data. Quality Control samples include trip blanks, <br /> equipment blanks, and field duplicates. The type, description, preparation and collection, <br /> and frequency of Quality Control samples are described below. <br /> 3.8.1 Trip Blank <br /> A trip blank is Type II reagent grade water, or better, that is kept with the field sample <br /> containers from the time they leave the laboratory until the time they are returned to the <br /> laboratory. The purpose of the trip blank is to evaluate possible cross-contamination of <br /> aqueous samples during transit or sample collection. Trip blanks pertain only to volatile <br /> organic analyses. Therefore the containers must contain no headspace. Only one trip blank <br /> is used per sample container/cooler. <br /> 3.8.2 Matrix Spike/Matrix Spike Duplicate <br /> Samples (i.e., soil and groundwater) will be prepared for Matrix Spike/Matrix Spike <br /> Duplicates at a frequency of 1 per 20 or fewer field samples (5%). <br /> 3.8.3 Duplicate Samples <br /> A duplicate groundwater sample is a second groundwater sample collected independently at a <br /> single sampling location. A duplicate soil sample a second soil sample collected adjacent to <br /> the initial soil sample. Field duplicates will be identified so that laboratory personnel are <br /> unable to distinguish them from field samples. Duplicate samples will be collected at a <br /> frequency of 1 per every 10 or fewer(10%) field samples per matrix; with a minimum of one <br /> duplicate sample collected per sampling day. Duplicate samples are to be analyzed utilizing <br /> the same types of analyses as their associated field samples. <br /> 4.0 FIELD QUALITY CONTROL PROGRAM <br /> Field quality control will be provided through strict adherence to sampling protocol and <br /> decontamination procedures. <br /> 4.1 Control Parameters <br /> Control parameters of the field procedures consist of the same controls that govern analytical <br /> data. These parameters are controlled through the assessment of data by precision, accuracy, <br /> representativeness, and completeness. Control parameters consist of the following: <br /> 2303 West Lane 9 of 11 <br /> Site Investigation Work Plan <br /> May 2009 <br />