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GROUND ZERO ANALYSIS, INC. Quality Control/Quality Assurance Plan <br /> 5.2 Chain Of Custody Record And Sample Analysis Request Form <br /> A chain of custody record for each container or sample will be used to track possession of the <br /> samples from the time they were collected in the field until the time they are analyzed in the <br /> laboratory. <br /> The chain of custody record will contain the following information: <br /> 1. Site Name <br /> 2. Signature of collector <br /> 3. Date and time of collection <br /> 4. Sample identification number(s) <br /> 5. Number of containers in sample set <br /> 6. Description of sample and container(s) <br /> 7. Name and signature of persons, and the companies or agencies they <br /> represent, who are involved in the chain of possession <br /> 8. Inclusive dates and times of possession <br /> 9. Requested analysis for each sample <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 4C 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 properly preserved <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 and deionized water. <br /> G:\GROUNDZE\QAQC\QAQC.doc <br /> 3 <br />