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Quality Assurance/Quality Control Plan Page 4 <br /> 5.3 DELIVERY OF SAMPLES TO LABORATORY <br /> Samples will be delivered to the laboratory on a daily basis. Samples will be refrigerated to <br /> approximately 4°C for shipping. Shipping containers will be sealed with security tape to assure <br /> sample integrity during shipping. Delivered samples will be accompanied by a chain-of-custody <br /> record. The laboratory shall note on the chain-of-custody that samples were Pro erlYPreserved <br /> and security tape was intact upon arrival. <br /> 6.0 SAMPLING AND DRILLING EQUIPMENT DECONTAMINATION <br /> All equipment used for drilling and sampling will be decontaminated prior to use. All equipment <br /> used for collection of more than one sample, such as bailers and spoons, will be decontaminated <br /> between each use to prevent cross contamination between samples. Drilling equipment will be <br /> decontaminated prior to commencing drilling at each hole. Well construction materials will be <br /> cleaned as necessary, prior to installation. <br /> Equipment and well material decontamination will be conducted on an impermeable surface and <br /> all decontamination effluent will be contained. All surfaces of the equipment will be thoroughly <br /> decontaminated using a steam cleaner. The equipment will be placed on a drying rack for air <br /> drying. The decontamination water will be stored in containers certified for hazardous materials <br /> storage and disposed of in an approved manner. <br /> Sample equipment to be used for pesticides and organic analysis will be washed in a <br /> nonphosphate detergent (Alconox or equivalent) and rinsed with tap water, followed by <br /> deionized water and finally with acetone. If the equipment is for metals analysis, the initial rinse <br /> will be conducted with 0.1 M nitric acid followed by tap water and deionized water. <br /> 7.0 FIELD EQUIPMENT CALIBRATION AND MAINTENANCE <br /> The following measuring equipment may be used during the Remedial Investigation. Equipment <br /> is grouped by field activity. Calibration procedures and frequency are listed for each piece. <br />