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v RESNA Industries Inc. Quality Assurance/Quality Control Plan Revised November 1992 ✓ inclusive dates and times of possession ✓ requested analysis for each sample 5.3 Delivery of Samples to Laboratory Samples will be delivered to the laboratory on a daily basis. Samples will be refrigerated P Y Y to approximately 4°C for shipping. Shipping containers will be sealed with security tape to assure sample integrity during shipping. Delivered samples will be accompanied by a chain-of-custody record. The laboratory shall note on the chain-of-custody that samples were properly preserved and security tape was intact upon arrival. 6.0 SAMPLING AND DRILLING EQUIPMENT DECONTAMINATION All equipment used for drilling and sampling will be decontaminated prior to use. All equipment used for collection of more than one sample, such as bailers and spoons, will be decontaminated between each use to prevent cross contamination between samples. Drilling equipment will be decontaminated prior to commencing drilling at each hole. Well construction materials will be cleaned as necessary, prior to installation. i Equipment and well material decontamination will be conducted on an impermeable surface and all decontamination effluent will be contained. All surfaces of the equipment will be thoroughly decontaminated using a steam cleaner. The equipment will be placed on a drying rack for air drying. The decontamination water will be stored in containers certified for hazardous materials storage and disposed of in an approved manner. 1 Sample equipment to be used for pesticides and organic analysis will be washed in a nonphosphate detergent(Alconox or equivalent)and rinsed with tap water, followed by deionized water. If the equipment is for metals analysis, the initial rinse will be conducted with 0.1 N i nitric acid followed by tap water and deionized water. QAQC1092.FNL 4 i I