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r I t 4 <br /> ATC Associates Inc. <br /> Quality Assurance/Quality Control plan <br /> Revised March 1998 <br /> 2.0 SAMPLE CONTAINERS <br /> Groundwater samples will be placed in containers supplied by the analytical laboratory. Table 1 <br /> summarizes the required sample containers. <br /> Soil samples will be collected in either 8-ounce widemouth clear glass jars provided by the <br /> laboratory or in clean brass or stainless steel tubes (Table 1). Screw on caps will be fitted with <br /> teflon liners. Tubes will be tightly capped and sealed. <br /> 3.0 QUALITY CONTROL FIELD SAMPLES <br /> A QC program independent from the laboratory's program will be instituted. The program <br /> entails "blind" submittals to the laboratory of blank and duplicate samples. No spiked samples <br /> will be supplied from the field for this investigation. The laboratory in-house QC program will <br /> include analysis of spiked samples. All QC samples will be assigned independent sample <br /> numbers and made indistinguishable from non-QC samples. <br /> When sampling groundwater, travel blanks will be used to detect the introduction of <br /> contaminants during transportation from the field to the laboratory. The travel blanks will be <br /> provided by the analytical laboratory. They will be taken to the field and accompany the <br /> collected groundwater samples to the laboratory for analysis. The blanks will consist of <br /> deionized water and analytically confirmed organic-free water. The blank is numbered, <br /> packaged, and sealed in the same manner as the other samples. <br /> W:\Adrnin\Shells\QAQC-98.D0C <br /> 2 <br />