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GROUND ZERO ANALYSIS, INC. <br />0 <br />Quality Control/Quality Assurance Plan <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. Spiked and <br />duplicate samples will not be collected for this phase of work. <br />When sampling storm drain effluent, a travel blank will be used to detect the introduction of <br />contaminants during transportation from the field to the laboratory. The travel blank will be <br />provided by the analytical laboratory and will be taken to the field and accompany the collected <br />groundwater samples to the laboratory for analysis. The blank will consist of deionized water or <br />analytically confirmed organic -free water. The blank is numbered, packaged, and sealed in the <br />same manner as the other samples. <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 if necessary as indicated on Table 1 and placed in a refrigerated container <br />immediately after collection. Chemical ice sealed in plastic and/or ice will be used to cool and <br />maintain samples at a temperature of approximately 4°C. Temperature will be measured by <br />laboratory upon receipt. <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 />G:\GROUNDZE\LIONUDAKIS\WorkPlan\QAQC.doe <br />2 <br />