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3.0 QUALITY CONTROL FIELD SAMPLES <br />A QC program independent from the laboratory's program will be instituted as required. The <br />program would entail "blind" submittals to the laboratory of blank and duplicate samples. <br />Spiked samples may also be submitted from the field where appropriate. The laboratory in- <br />house QC program will include analysis of spiked samples. All QC samples will be assigned <br />independent sample 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 or analytically confirmed organic -free water. The blank is numbered, packaged, <br />and sealed in the same manner as the other samples. <br />When required, ten percent of the water samples submitted to the laboratory for analysis wil be <br />duplicates. Water sample duplicated will be created filling two sample bottles from the well <br />bailer. If more than one bailer volume is required, each bailer volume wil be split between <br />containers. <br />4.0 SAMPLE PRESERVATION <br />Sample containers will be pre -cooled and transported to the site in the cooler. All samples will <br />be preserved as indicated on Table 1 and placed in a refrigerated container immediately after <br />collection. Chemical ice sealed in plastic will be used to cool and maintain samples at a <br />temperature of approximately 4C. A high -low thermometer wil accompany the samples to <br />document transport conditions. Further discussion of sample preservation is included in the <br />sampling protocols (Section 11 and 12). <br />5.0 CHAIN OF CUSTODY PROCEDURES <br />5.1 SAMPLE LABELS <br />Each sample container will be labeled prior to filling to prevent misidentification. The label will <br />contain at least the following information: <br />- Sample number which uniquely identifies the sample <br />- Project title or number <br />- Location or sample collection <br />- Soil boring or well number, as applicable <br />- Name of collector <br />- Date and times of collection <br />- Type of analysis requested <br />2 <br />