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ATC Associates Inc. <br /> Quality Assurance/Quality Control Plan <br /> Revised November 2002 <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 entails <br /> "blind" submittals to the laboratory of blank and duplicate samples. No field spiked samples will <br /> be supplied for this investigation. The laboratory in-house QC program will include analysis of <br /> spiked samples. All QC samples will be assigned independent sample numbers and made <br /> indistinguishable from non-QC samples. <br /> When sampling groundwater, travel blanks will be used to detect the introduction of contaminants <br /> during transportation from the field to the laboratory. The travel blanks will be provided by the <br /> analytical laboratory. They will be taken to the field and accompany the collected groundwater <br /> samples to the laboratory for analysis. The blanks will consist of deionized water and analytically <br /> confirmed organic-free water. The blank is numbered, packaged, and sealed in the same manner as <br /> the other samples. <br /> Water sample duplicates will be created by filling two sample bottles from the well bailer. If more <br /> than one bailer volume is required, each bailer volume will be split between containers. <br /> w:\admin\shells\qaqc-02.doc <br /> 2 <br />