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3.3.1 Duplicate Samples <br /> Four duplicate storm water runoff samples will be collected. Each of <br /> the duplicate samples will be collected simultaneously with the original <br /> storm water sample of a given area. The sampling methods used to collect <br /> original and duplicate samples will be identical. In addition, original <br /> and duplicate samples will be placed in identical containers and handled in <br /> the same manner. The two sample areas from which the duplicates are <br /> collected will be documented in the field logbook. <br /> 3.3.2 Trip Blanks <br /> Two trip blanks will be prepared in clean sample containers by the <br /> laboratory to accompany sample containers transported to the site. The <br /> trip blanks will remain onsite during sampling and will be submitted to the <br /> laboratory for analysis with the storm water samples. <br /> 3.3.3 Background Samples <br /> Two background samples will be collected at the nozzle tip from each <br /> water supply used to wash down the sampling areas. Background samples will <br /> be collected before and after each water supply is used and the samples <br /> will be analyzed in the same manner as the storm water samples. <br /> 3.4 Decontamination Procedures <br /> Decontamination procedures for personnel, equipment, and disposal of <br /> waste materials will be in accordance with the Health and Safety Plan for <br /> Remedial Activities at the site. The catch basin cover materials will be <br /> disposed of between the flooding of each sampling area to prevent <br /> cross-contamination. <br /> 3 <br />